/**
 * BCFPanel.js
 *
 * @author realor
 */

import { Panel } from './Panel.js'
import { Controls } from './Controls.js'
import { ServiceDialog } from './ServiceDialog.js'
import { MessageDialog } from './MessageDialog.js'
import { ConfirmDialog } from './ConfirmDialog.js'
import { LoginDialog } from './LoginDialog.js'
import { Dialog } from './Dialog.js'
import { TabbedPane } from './TabbedPane.js'
import { Toast } from './Toast.js'
import { ServiceManager } from '../io/ServiceManager.js'
import { BCFService } from '../io/BCFService.js'
import * as THREE from '../lib/three.module.js'

class BCFPanel extends Panel {
    constructor(application) {
        super(application)
        this.id = 'bcf_panel'
        this.title = 'BCF'
        this.position = 'left'
        this.group = 'bcf' // service group
        this.minimumHeight = 200

        this.service = null

        this.topics = null
        this.extensions = null
        this.index = -1
        this.viewpointGuid = null
        this.viewpoints = null
        this.commentGuid = null
        this.comments = null
        this.docRefs = null
        this.docRefGuid = null

        // search panel
        this.searchPanelElem = document.createElement('div')
        this.searchPanelElem.id = 'bcf_search_panel'
        this.searchPanelElem.className = 'bcf_panel'
        this.bodyElem.appendChild(this.searchPanelElem)

        // connect panel

        this.connPanelElem = document.createElement('div')
        this.connPanelElem.className = 'bcf_body'
        this.searchPanelElem.appendChild(this.connPanelElem)

        this.bcfServiceElem = Controls.addSelectField(this.connPanelElem, 'bcfService', 'bim|label.bcf_service', [])
        this.bcfServiceElem.addEventListener('change', event => {
            let name = this.bcfServiceElem.value
            this.service = this.application.services[this.group][name]
            this.filterPanelElem.style.display = 'none'
            this.topicTableElem.style.display = 'none'
        })

        this.connButtonsElem = document.createElement('div')
        this.connPanelElem.appendChild(this.connButtonsElem)
        this.connButtonsElem.className = 'bcf_buttons'

        this.connectButton = Controls.addButton(this.connButtonsElem, 'bcfConnect', 'button.connect', () => this.refreshProjects())
        this.addServiceButton = Controls.addButton(this.connButtonsElem, 'bcfAdd', 'button.add', () => this.showAddDialog())
        this.editServiceButton = Controls.addButton(this.connButtonsElem, 'bcfEdit', 'button.edit', () => this.showEditDialog())
        this.deleteServiceButton = Controls.addButton(this.connButtonsElem, 'bcfDelete', 'button.delete', () => this.showDeleteDialog())

        // filter panel

        this.filterPanelElem = document.createElement('div')
        this.filterPanelElem.className = 'bcf_body'
        this.filterPanelElem.style.display = 'none'
        this.searchPanelElem.appendChild(this.filterPanelElem)

        this.projectElem = Controls.addSelectField(this.filterPanelElem, 'bcfProject', 'bim|label.project')
        this.projectElem.addEventListener('change', () => this.changeProject())

        this.statusFilterElem = Controls.addSelectField(this.filterPanelElem, 'bcfStatusFilter', 'bim|label.status')

        this.priorityFilterElem = Controls.addSelectField(this.filterPanelElem, 'bcfPriorityFilter', 'bim|label.priority')

        this.assignedToFilterElem = Controls.addSelectField(this.filterPanelElem, 'bcfAssignedToFilter', 'bim|label.assigned_to')

        this.filterButtonsElem = document.createElement('div')
        this.filterButtonsElem.className = 'bcf_buttons'
        this.filterPanelElem.appendChild(this.filterButtonsElem)

        this.searchTopicsButton = Controls.addButton(this.filterButtonsElem, 'searchTopics', 'button.search', () => this.searchTopics())
        this.searchTopicsButton.disabled = true

        this.setupProjectButton = Controls.addButton(this.filterButtonsElem, 'setupProject', 'button.setup', () => this.showProjectSetup())
        this.setupProjectButton.disabled = true

        this.searchNewTopicButton = Controls.addButton(this.filterButtonsElem, 'searchNewTopic', 'button.create', () => this.showTopic())
        this.searchNewTopicButton.disabled = true

        // topic table

        this.topicTableElem = Controls.addTable(this.searchPanelElem, 'topicTable', ['bim|col.index', 'bim|col.topic', 'bim|col.status'], 'data')
        this.topicTableElem.style.display = 'none'
        this.searchPanelElem.appendChild(this.topicTableElem)

        // detail panel

        this.detailPanelElem = document.createElement('div')
        this.detailPanelElem.id = 'bcf_detail_panel'
        this.detailPanelElem.className = 'bcf_panel'
        this.detailPanelElem.style.display = 'none'
        this.bodyElem.appendChild(this.detailPanelElem)

        this.detailBodyElem = document.createElement('div')
        this.detailBodyElem.className = 'bcf_body'
        this.detailPanelElem.appendChild(this.detailBodyElem)

        this.detailHeaderElem = document.createElement('div')
        this.detailHeaderElem.className = 'bcf_topic_nav'
        this.detailBodyElem.appendChild(this.detailHeaderElem)

        this.backButton = Controls.addButton(this.detailHeaderElem, 'backTopics', 'button.back', () => this.showTopicList())

        this.topicNavElem = document.createElement('span')
        this.detailHeaderElem.appendChild(this.topicNavElem)

        this.previousTopicButton = Controls.addButton(this.topicNavElem, 'previousTopic', '<', () => this.showPreviousTopic())

        this.topicSearchIndexElem = document.createElement('span')
        this.topicNavElem.appendChild(this.topicSearchIndexElem)

        this.nextTopicButton = Controls.addButton(this.topicNavElem, 'nextTopic', '>', () => this.showNextTopic())

        this.detailNewTopicButton = Controls.addButton(this.detailHeaderElem, 'detailNewTopic', 'button.create', () => this.showTopic())

        this.topicIndexElem = Controls.addTextField(this.detailBodyElem, 'topic_index', 'bim|label.index')
        this.topicIndexElem.setAttribute('readonly', true)

        this.titleElem = Controls.addTextField(this.detailBodyElem, 'topic_title', 'bim|label.title')

        this.topicTypeElem = Controls.addSelectField(this.detailBodyElem, 'topic_type', 'bim|label.type')

        this.priorityElem = Controls.addSelectField(this.detailBodyElem, 'topic_priority', 'bim|label.priority')

        this.topicStatusElem = Controls.addSelectField(this.detailBodyElem, 'topic_status', 'bim|label.status')

        this.stageElem = Controls.addSelectField(this.detailBodyElem, 'topic_stage', 'bim|label.stage')

        this.createdByElem = Controls.addTextField(this.detailBodyElem, 'topic_created_by', 'bim|label.creation_author')
        this.createdByElem.setAttribute('readonly', true)

        this.assignedToElem = Controls.addSelectField(this.detailBodyElem, 'topic_assigned_to', 'bim|label.assigned_to')

        this.dueDateElem = Controls.addDateField(this.detailBodyElem, 'due_date', 'bim|label.due_date')

        this.descriptionElem = Controls.addTextAreaField(this.detailBodyElem, 'description', 'bim|label.description', null, 'bcf_description')

        this.detailButtonsElem = document.createElement('div')
        this.detailButtonsElem.className = 'bcf_buttons'
        this.detailBodyElem.appendChild(this.detailButtonsElem)

        this.saveTopicButton = Controls.addButton(this.detailButtonsElem, 'saveTopic', 'button.save', () => this.saveTopic())

        this.deleteTopicButton = Controls.addButton(this.detailButtonsElem, 'deleteTopic', 'button.delete', () => {
            ConfirmDialog.create('bim|title.delete_topic', 'bim|question.delete_topic')
                .setAction(() => this.deleteTopic())
                .setAcceptLabel('button.delete')
                .setI18N(application.i18n)
                .show()
        })

        this.tabbedPane = new TabbedPane(this.detailPanelElem)
        this.tabbedPane.paneElem.classList.add('bcf_tabs')

        /* viewpoints panel */

        this.viewpointsPanelElem = this.tabbedPane.addTab('viewpoints', 'bim|tab.viewpoints')

        this.viewpointListElem = document.createElement('ul')
        this.viewpointListElem.classList = 'bcf_list'
        this.viewpointsPanelElem.appendChild(this.viewpointListElem)

        this.createViewpointButton = Controls.addButton(this.viewpointsPanelElem, 'createViewpoint', 'bim|button.screenshot', () => this.createViewpoint())

        this.createViewpointFromFileButton = Controls.addButton(this.viewpointsPanelElem, 'createViewpointFF', 'bim|button.upload_image', () => this.createViewpointFromFile())

        /* comments panel */

        this.commentsPanelElem = this.tabbedPane.addTab('comments', 'bim|tab.comments')

        this.commentListElem = document.createElement('ul')
        this.commentListElem.classList = 'bcf_list'
        this.commentsPanelElem.appendChild(this.commentListElem)

        this.commentElem = Controls.addTextAreaField(this.commentsPanelElem, 'comment', 'bim|label.comment')
        this.saveCommentButton = Controls.addButton(this.commentsPanelElem, 'saveComment', 'button.save', () => this.saveComment())
        this.cancelCommentButton = Controls.addButton(this.commentsPanelElem, 'cancelComment', 'button.cancel', () => this.cancelComment())

        /* document reference panel */

        this.docRefsPanelElem = this.tabbedPane.addTab('documents', 'bim|tab.doc_refs')

        this.docRefListElem = document.createElement('ul')
        this.docRefListElem.classList = 'bcf_list'
        this.docRefsPanelElem.appendChild(this.docRefListElem)

        this.docRefUrlElem = Controls.addTextAreaField(this.docRefsPanelElem, 'docRefUrl', 'bim|label.doc_ref_url')
        this.docRefDescElem = Controls.addTextAreaField(this.docRefsPanelElem, 'docRefDesc', 'bim|label.doc_ref_description')
        this.saveDocRefButton = Controls.addButton(this.docRefsPanelElem, 'saveDocRef', 'button.save', () => this.saveDocumentReference())
        this.cancelDocRefButton = Controls.addButton(this.docRefsPanelElem, 'cancelDocRef', 'button.cancel', () => this.cancelDocumentReference())

        /* audit panel */

        this.auditPanelElem = this.tabbedPane.addTab('audit', 'bim|tab.audit')
        this.auditPanelElem.classList.add('bcf_body')

        this.guidElem = Controls.addTextField(this.auditPanelElem, 'topic_guid', 'GUID:')
        this.guidElem.setAttribute('readonly', true)

        this.creationDateElem = Controls.addTextField(this.auditPanelElem, 'topic_creation_date', 'bim|label.creation_date')
        this.creationDateElem.setAttribute('readonly', true)

        this.creationAuthorElem = Controls.addTextField(this.auditPanelElem, 'topic_creation_author', 'bim|label.creation_author')
        this.creationAuthorElem.setAttribute('readonly', true)

        this.modifyDateElem = Controls.addTextField(this.auditPanelElem, 'topic_modify_date', 'bim|label.modify_date')
        this.modifyDateElem.setAttribute('readonly', true)

        this.modifyAuthorElem = Controls.addTextField(this.auditPanelElem, 'topic_modify_author', 'bim|label.modify_author')
        this.modifyAuthorElem.setAttribute('readonly', true)

        // setup panel

        this.setupPanelElem = document.createElement('div')
        this.setupPanelElem.id = 'bcf_config_panel'
        this.setupPanelElem.className = 'bcf_panel'
        this.setupPanelElem.style.display = 'none'
        this.bodyElem.appendChild(this.setupPanelElem)

        this.setupBodyElem = document.createElement('div')
        this.setupBodyElem.className = 'bcf_project_setup'
        this.setupPanelElem.appendChild(this.setupBodyElem)

        this.backSetupButton = Controls.addButton(this.setupBodyElem, 'backSetup', 'button.back', () => this.showTopicList())

        this.projectNameElem = Controls.addTextField(this.setupBodyElem, 'project_name', 'bim|label.project_name')

        this.saveProjectButtonsElem = document.createElement('div')
        this.saveProjectButtonsElem.className = 'bcf_buttons'
        this.setupBodyElem.appendChild(this.saveProjectButtonsElem)

        this.saveProjectNameButton = Controls.addButton(this.saveProjectButtonsElem, 'saveProjectName', 'button.save', () => this.saveProjectName())

        this.extensionsView = Controls.addCodeEditor(this.setupBodyElem, 'extensions_json', 'bim|label.project_extensions', '', { language: 'json', height: '200px' })

        this.saveExtensionsButtonsElem = document.createElement('div')
        this.saveExtensionsButtonsElem.className = 'bcf_buttons'
        this.setupBodyElem.appendChild(this.saveExtensionsButtonsElem)

        this.saveExtensionsButton = Controls.addButton(this.saveExtensionsButtonsElem, 'saveExtensions', 'button.save', () => this.saveProjectExtensions())
    }

    clearTopics() {
        this.topicTableElem.tBodies[0].innerHTML = ''
    }

    showTopicList() {
        this.searchPanelElem.style.display = ''
        this.detailPanelElem.style.display = 'none'
        this.setupPanelElem.style.display = 'none'
        if (this.topics === null) {
            this.searchTopics()
        }
    }

    showTopic(topic = null, index = -1) {
        // index == -1 when topic was created or udpated
        this.searchPanelElem.style.display = 'none'
        this.detailPanelElem.style.display = ''
        this.setupPanelElem.style.display = 'none'
        this.tabbedPane.paneElem.style.display = 'none'

        if (topic === null || index !== -1) {
            this.viewpointListElem.innerHTML = ''
            this.commentListElem.innerHTML = ''
            this.docRefListElem.innerHTML = ''
        }

        this.deleteTopicButton.disabled = topic === null
        this.index = index

        if (this.topics && index !== -1) {
            this.topicSearchIndexElem.innerHTML = index + 1 + ' / ' + this.topics.length
            this.previousTopicButton.disabled = index === 0
            this.nextTopicButton.disabled = index === this.topics.length - 1
        } else {
            this.topicSearchIndexElem.innerHTML = '?'
            this.previousTopicButton.disabled = true
            this.nextTopicButton.disabled = true
        }

        if (topic) {
            this.guidElem.value = topic.guid
            this.topicIndexElem.value = topic.index
            this.titleElem.value = topic.title
            this.descriptionElem.value = topic.description
            this.dueDateElem.value = this.removeTime(topic.due_date)
            this.creationDateElem.value = this.formatDate(topic.creation_date)
            this.createdByElem.value = topic.creation_author
            this.creationAuthorElem.value = topic.creation_author
            this.modifyDateElem.value = this.formatDate(topic.modify_date)
            this.modifyAuthorElem.value = topic.modify_author

            Controls.setSelectValue(this.topicTypeElem, topic.topic_type)
            Controls.setSelectValue(this.priorityElem, topic.priority)
            Controls.setSelectValue(this.topicStatusElem, topic.topic_status)
            Controls.setSelectValue(this.stageElem, topic.stage)
            Controls.setSelectValue(this.assignedToElem, topic.assigned_to)
        } else {
            this.guidElem.value = null
            this.topicIndexElem.value = null
            this.titleElem.value = null
            this.descriptionElem.value = null
            this.dueDateElem.value = null
            this.creationDateElem.value = null
            this.createdByElem.value = null
            this.creationAuthorElem.value = null
            this.modifyDateElem.value = null
            this.modifyAuthorElem.value = null

            Controls.setSelectValue(this.topicTypeElem, null)
            Controls.setSelectValue(this.priorityElem, null)
            Controls.setSelectValue(this.topicStatusElem, null)
            Controls.setSelectValue(this.stageElem, null)
            Controls.setSelectValue(this.assignedToElem, null)
        }

        if (topic) {
            this.tabbedPane.paneElem.style.display = ''

            if (index !== -1) {
                this.loadComments(false, () => this.loadViewpoints(false, () => this.loadDocumentReferences(false)))
            }
        }
        this.commentGuid = null
        this.commentElem.value = null
        this.docRefGuid = null
        this.docRefUrlElem.value = null
        this.docRefDescElem.value = null
    }

    showPreviousTopic() {
        if (this.topics) {
            let index = this.index
            if (index > 0) {
                index--
                this.showTopic(this.topics[index], index)
            }
        }
    }

    showNextTopic() {
        if (this.topics) {
            let index = this.index
            if (index >= 0 && index < this.topics.length - 1) {
                index++
                this.showTopic(this.topics[index], index)
            }
        }
    }

    searchTopics() {
        let projectId = this.getProjectId()
        if (projectId === null) return

        const onCompleted = topics => {
            this.hideProgressBar()
            this.topics = topics
            this.populateTopicTable()
        }

        const onError = error => {
            this.handleError(error, () => this.searchTopics())
        }

        let filter = {
            status: this.statusFilterElem.value,
            priority: this.priorityFilterElem.value,
            assignedTo: this.assignedToFilterElem.value
        }
        this.showProgressBar()
        this.service.getTopics(projectId, filter, onCompleted, onError)
    }

    saveTopic() {
        const application = this.application
        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value
        let topic = {
            title: this.titleElem.value,
            topic_type: this.topicTypeElem.value,
            priority: this.priorityElem.value,
            topic_status: this.topicStatusElem.value,
            stage: this.stageElem.value,
            assigned_to: this.assignedToElem.value,
            description: this.descriptionElem.value,
            due_date: this.addTime(this.dueDateElem.value)
        }

        const onCompleted = topic => {
            this.hideProgressBar()
            this.showTopic(topic)
            this.topics = null
            Toast.create('bim|message.topic_saved')
                .setI18N(application.i18n)
                .show()
        }

        const onError = error => {
            this.handleError(error, () => this.saveTopic())
        }

        this.showProgressBar()
        if (topicGuid) {
            // update
            this.service.updateTopic(projectId, topicGuid, topic, onCompleted, onError)
        } // creation
        else {
            this.service.createTopic(projectId, topic, onCompleted, onError)
        }
    }

    deleteTopic() {
        const application = this.application
        const onCompleted = () => {
            this.hideProgressBar()
            this.showTopic()
            this.topics = null // force topic list refresh
            Toast.create('bim|message.topic_deleted')
                .setI18N(application.i18n)
                .show()
        }

        const onError = error => {
            this.handleError(error, () => this.deleteTopic())
        }

        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value
        if (topicGuid) {
            this.showProgressBar()
            this.service.deleteTopic(projectId, topicGuid, onCompleted, onError)
        }
    }

    loadViewpoints(scrollBottom, onSuccess) {
        const onCompleted = viewpoints => {
            this.hideProgressBar()
            this.viewpoints = viewpoints
            this.populateViewpointList()
            if (scrollBottom) {
                this.detailPanelElem.scrollTop = this.detailPanelElem.scrollHeight
            }
            if (onSuccess) onSuccess()
        }

        const onError = error => {
            this.handleError(error, () => this.loadViewpoints(scrollBottom, onSuccess))
        }

        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value

        this.showProgressBar()
        this.service.getViewpoints(projectId, topicGuid, onCompleted, onError)
    }

    createViewpoint(imageURL = null) {
        const application = this.application
        const viewpoint = {}
        const camera = application.camera
        const matrix = camera.matrixWorld
        const xAxis = new THREE.Vector3()
        const yAxis = new THREE.Vector3()
        const zAxis = new THREE.Vector3()
        const position = new THREE.Vector3()

        matrix.extractBasis(xAxis, yAxis, zAxis)
        position.setFromMatrixPosition(matrix)

        if (camera instanceof THREE.PerspectiveCamera) {
            viewpoint.perspective_camera = {
                camera_view_point: { x: position.x, y: position.y, z: position.z },
                camera_direction: { x: zAxis.x, y: zAxis.y, z: zAxis.z },
                camera_up_vector: { x: yAxis.x, y: yAxis.y, z: yAxis.z },
                field_of_view: camera.fov
            }
        } else if (camera instanceof THREE.OrthographicCamera) {
            viewpoint.orthogonal_camera = {
                camera_view_point: { x: position.x, y: position.y, z: position.z },
                camera_direction: { x: zAxis.x, y: zAxis.y, z: zAxis.z },
                camera_up_vector: { x: yAxis.x, y: yAxis.y, z: yAxis.z },
                view_to_world_scale: (0.5 * camera.zoom) / camera.right
            }
        }

        const onCompleted = viewpoint => {
            this.hideProgressBar()
            this.loadViewpoints(true)
            Toast.create('bim|message.viewpoint_saved')
                .setI18N(application.i18n)
                .show()
        }

        const onError = error => {
            this.handleError(error, () => this.createViewpoint(imageURL))
        }

        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value

        if (imageURL === null) {
            // capture image from canvas
            const canvas = this.application.renderer.domElement
            imageURL = canvas.toDataURL('image/png')
        }

        let format = null

        if (imageURL.startsWith('data:image/jpeg;base64,')) {
            format = 'jpeg'
        } else if (imageURL.startsWith('data:image/png;base64,')) {
            format = 'png'
        }
        if (format) {
            const index = imageURL.indexOf(',')
            let image = imageURL.substring(index + 1)

            viewpoint.snapshot = {
                snapshot_type: format,
                snapshot_data: image
            }

            this.showProgressBar()
            this.service.createViewpoint(projectId, topicGuid, viewpoint, onCompleted, onError)
        } else {
            this.handleError({ code: 0, message: 'Unsupported image format' })
        }
    }

    createViewpointFromFile() {
        const onChange = () => {
            let files = this.inputFile.files
            if (files.length > 0) {
                let file = files[0]
                let reader = new FileReader()
                reader.onload = () => {
                    let imageURL = reader.result
                    this.createViewpoint(imageURL)
                }
                reader.readAsDataURL(file)
            }
        }

        let inputFile = document.createElement('input')
        this.inputFile = inputFile

        inputFile.type = 'file'
        inputFile.id = this.name + '_file'

        inputFile.accept = '.jpeg, .jpg, .png'
        inputFile.addEventListener('change', onChange, false)

        inputFile.click()
    }

    deleteViewpoint(viewpoint) {
        const application = this.application
        const onCompleted = () => {
            this.hideProgressBar()
            this.loadViewpoints()
            Toast.create('bim|message.viewpoint_deleted')
                .setI18N(application.i18n)
                .show()
        }

        const onError = error => {
            this.handleError(error, () => this.deleteViewpoint(viewpoint))
        }

        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value

        if (topicGuid) {
            this.showProgressBar()
            this.service.deleteViewpoint(projectId, topicGuid, viewpoint.guid, onCompleted, onError)
        }
    }

    loadComments(scrollBottom, onSuccess) {
        const onCompleted = comments => {
            this.hideProgressBar()
            this.comments = comments
            this.populateCommentList()
            if (scrollBottom) {
                this.detailPanelElem.scrollTop = this.detailPanelElem.scrollHeight
            }
            if (onSuccess) onSuccess()
        }

        const onError = error => {
            this.handleError(error, () => this.loadComments(scrollBottom, onSuccess))
        }

        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value

        this.showProgressBar()
        this.service.getComments(projectId, topicGuid, onCompleted, onError)
    }

    saveComment() {
        const application = this.application
        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value
        let comment = {
            comment: this.commentElem.value
        }

        const onCompleted = comment => {
            this.hideProgressBar()
            this.commentElem.value = null
            this.commentGuid = null
            this.loadComments(true)
            Toast.create('bim|message.comment_saved')
                .setI18N(application.i18n)
                .show()
        }

        const onError = error => {
            this.handleError(error, () => this.saveComment())
        }

        this.showProgressBar()
        if (this.commentGuid) {
            // update
            this.service.updateComment(projectId, topicGuid, this.commentGuid, comment, onCompleted, onError)
        } // creation
        else {
            this.service.createComment(projectId, topicGuid, comment, onCompleted, onError)
        }
    }

    deleteComment(comment) {
        const application = this.application
        const onCompleted = () => {
            this.hideProgressBar()
            this.loadComments()
            Toast.create('bim|message.comment_deleted')
                .setI18N(application.i18n)
                .show()
        }

        const onError = error => {
            this.handleError(error, () => this.deleteComment())
        }

        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value
        if (topicGuid) {
            this.showProgressBar()
            this.service.deleteComment(projectId, topicGuid, comment.guid, onCompleted, onError)
        }
    }

    editComment(comment) {
        this.commentGuid = comment.guid
        this.commentElem.value = comment.comment
        this.detailPanelElem.scrollTop = this.detailPanelElem.scrollHeight
    }

    cancelComment() {
        this.commentGuid = null
        this.commentElem.value = null
        this.detailPanelElem.scrollTop = this.detailPanelElem.scrollHeight
    }

    loadDocumentReferences(scrollBottom, onSuccess) {
        const onCompleted = docRefs => {
            this.hideProgressBar()
            this.docRefs = docRefs
            this.populateDocumentReferenceList()
            if (scrollBottom) {
                this.detailPanelElem.scrollTop = this.detailPanelElem.scrollHeight
            }
            if (onSuccess) onSuccess()
        }

        const onError = error => {
            this.handleError(error, () => this.loadDocumentReferences(scrollBottom, onSuccess))
        }

        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value

        this.showProgressBar()
        this.service.getDocumentReferences(projectId, topicGuid, onCompleted, onError)
    }

    saveDocumentReference() {
        const application = this.application
        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value
        let docRef = {
            url: this.docRefUrlElem.value,
            description: this.docRefDescElem.value
        }

        const onCompleted = docRef => {
            this.hideProgressBar()
            this.docRefUrlElem.value = null
            this.docRefDescElem.value = null
            this.docRefGuid = null
            this.loadDocumentReferences(true)
            Toast.create('bim|message.doc_ref_saved')
                .setI18N(application.i18n)
                .show()
        }

        const onError = error => {
            this.handleError(error, () => this.saveDocumentReference())
        }

        this.showProgressBar()
        if (this.docRefGuid) {
            // update
            this.service.updateDocumentReference(projectId, topicGuid, this.docRefGuid, docRef, onCompleted, onError)
        } // creation
        else {
            this.service.createDocumentReference(projectId, topicGuid, docRef, onCompleted, onError)
        }
    }

    editDocumentReference(docRef) {
        this.docRefGuid = docRef.guid
        this.docRefUrlElem.value = docRef.url
        this.docRefDescElem.value = docRef.description
        this.detailPanelElem.scrollTop = this.detailPanelElem.scrollHeight
    }

    cancelDocumentReference() {
        this.docRefGuid = null
        this.docRefUrlElem.value = null
        this.docRefDescElem.value = null
        this.detailPanelElem.scrollTop = this.detailPanelElem.scrollHeight
    }

    deleteDocumentReference(docRef) {
        const application = this.application
        const onCompleted = () => {
            this.hideProgressBar()
            this.loadDocumentReferences()
            Toast.create('bim|message.doc_ref_deleted')
                .setI18N(application.i18n)
                .show()
        }

        const onError = error => {
            this.handleError(error, () => this.deleteDocumentReference(docRef))
        }

        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value
        if (topicGuid) {
            this.showProgressBar()
            this.service.deleteDocumentReference(projectId, topicGuid, docRef.guid, onCompleted, onError)
        }
    }

    updateExtensions() {
        let projectId = this.getProjectId()
        if (projectId === null) return

        const onCompleted = extensions => {
            this.hideProgressBar()
            this.extensions = extensions
            this.populateExtensions()
        }

        const onError = error => {
            this.handleError(error, () => this.updateExtensions())
        }

        this.showProgressBar()
        this.service.getExtensions(projectId, onCompleted, onError)
    }

    refreshProjects() {
        const projects = []

        const onCompleted = serverProjects => {
            this.hideProgressBar()
            this.filterPanelElem.style.display = ''
            this.topicTableElem.style.display = ''

            const projectIdSet = new Set()

            for (let serverProject of serverProjects) {
                let projectId = serverProject.project_id
                let projectName = serverProject.name
                projectIdSet.add(projectId)
                projects.push([projectId, projectName])
            }

            const scene = this.application.scene
            scene.traverse(object => {
                if (object._ifc && object._ifc.constructor.name === 'IfcProject') {
                    let projectId = object._ifc.GlobalId
                    let projectName = object._ifc.Name || object._ifc.LongName
                    if (!projectIdSet.has(projectId)) {
                        projects.push([projectId, projectName])
                    }
                }
            })

            Controls.setSelectOptions(this.projectElem, projects)
            const disabled = projects.length === 0
            this.searchTopicsButton.disabled = disabled
            this.setupProjectButton.disabled = disabled
            this.searchNewTopicButton.disabled = disabled
            this.updateExtensions()
        }

        const onError = error => {
            this.handleError(error, () => this.refreshProjects())
        }

        this.clearTopics()
        this.showProgressBar()
        this.service.getProjects(onCompleted, onError)
    }

    saveProjectName() {
        const application = this.application
        const projectName = this.projectNameElem.value
        const index = this.projectElem.selectedIndex
        const options = this.projectElem.options
        const oldProjectName = options[index].label

        if (projectName !== oldProjectName) {
            const onCompleted = project => {
                this.hideProgressBar()
                options[index].label = project.name
                Toast.create('bim|message.project_saved')
                    .setI18N(application.i18n)
                    .show()
            }

            const onError = error => {
                this.handleError(error, () => this.saveProjectName())
            }

            const projectId = this.getProjectId()
            const project = {
                name: projectName
            }
            this.showProgressBar()
            this.service.updateProject(projectId, project, onCompleted, onError)
        }
    }

    saveProjectExtensions() {
        const application = this.application
        const extensionsText = this.extensionsView.state.doc.toString()
        const oldExtensionsText = JSON.stringify(this.extensions, null, 2)

        if (extensionsText !== oldExtensionsText) {
            const onCompleted = extensions => {
                this.hideProgressBar()
                this.extensions = extensions
                this.populateExtensions()
                Toast.create('bim|message.project_extensions_saved')
                    .setI18N(application.i18n)
                    .show()
            }

            const onError = error => {
                this.handleError(error, () => this.saveProjectExtensions())
            }

            try {
                let extensions = JSON.parse(extensionsText)

                const projectId = this.getProjectId()
                this.showProgressBar()
                this.service.updateExtensions(projectId, extensions, onCompleted, onError)
            } catch (ex) {
                console.error(ex)
            }
        }
    }

    showViewpoint(viewpoint) {
        const application = this.application
        let position, dir, up, camera

        if (viewpoint.perspective_camera) {
            const pcam = viewpoint.perspective_camera
            position = pcam.camera_view_point
            dir = pcam.camera_direction
            up = pcam.camera_up_vector
            let fov = pcam.field_of_view

            camera = this.application.perspectiveCamera
            camera.fov = fov
        } else {
            const ocam = viewpoint.orthogonal_camera
            position = ocam.camera_view_point
            dir = ocam.camera_direction
            up = ocam.camera_up_vector
            let scale = ocam.view_to_world_scale

            camera = this.application.orthographicCamera
            camera.zoom = scale
            camera.right = 0.5
            camera.left = -0.5
            camera.top = 0.1
            camera.bottom = -0.1
            camera.near = -100
            camera.far = 100
        }
        const xAxis = new THREE.Vector3()
        const yAxis = new THREE.Vector3(up.x, up.y, up.z)
        const zAxis = new THREE.Vector3(dir.x, dir.y, dir.z)
        xAxis.crossVectors(yAxis, zAxis).normalize()
        yAxis.normalize()
        zAxis.normalize()

        camera.matrix.makeBasis(xAxis, yAxis, zAxis)
        camera.matrix.setPosition(position.x, position.y, position.z)
        camera.matrix.decompose(camera.position, camera.quaternion, camera.scale)

        camera.updateMatrixWorld(true)
        application.notifyObjectsChanged(camera, this)
        application.activateCamera(camera)
    }

    showProjectSetup() {
        this.searchPanelElem.style.display = 'none'
        this.detailPanelElem.style.display = 'none'
        this.setupPanelElem.style.display = ''

        const index = this.projectElem.selectedIndex
        const options = this.projectElem.options
        this.projectNameElem.value = options[index].label

        const json = JSON.stringify(this.extensions, null, 2)

        const state = this.extensionsView.state
        const tx = state.update({ changes: { from: 0, to: state.doc.length, insert: json } })
        this.extensionsView.dispatch(tx)
    }

    populateTopicTable() {
        const topics = this.topics
        const topicsElem = this.topicTableElem
        topicsElem.tBodies[0].innerHTML = ''
        for (let i = 0; i < topics.length; i++) {
            let topic = topics[i]
            let rowElem = Controls.addTableRow(topicsElem)

            const openTopic = () => {
                this.showTopic(topic, i)
            }

            Controls.addLink(rowElem.children[0], topic.index, '#', null, null, openTopic)
            Controls.addLink(rowElem.children[1], topic.title, '#', null, null, openTopic)
            rowElem.children[2].innerHTML = topic.topic_status
        }
    }

    populateCommentList() {
        const comments = this.comments
        const commentsElem = this.commentListElem
        commentsElem.innerHTML = ''
        for (let comment of comments) {
            let itemListElem = document.createElement('li')

            let itemListHeaderElem = document.createElement('div')
            itemListElem.appendChild(itemListHeaderElem)

            let spanElem = document.createElement('span')
            spanElem.className = 'icon comment'
            itemListHeaderElem.appendChild(spanElem)

            let authorDate = comment.author || 'anonymous'
            if (comment.date) {
                authorDate += ' (' + this.formatDate(comment.date) + ')'
            }
            authorDate += ':'

            Controls.addText(itemListHeaderElem, authorDate, 'bcf_comment_author')
            Controls.addButton(itemListHeaderElem, 'updateComment', 'button.edit', () => this.editComment(comment), 'bcf_edit_comment')
            Controls.addButton(
                itemListHeaderElem,
                'deleteComment',
                'button.delete',
                () => {
                    ConfirmDialog.create('bim|title.delete_comment', 'bim|question.delete_comment')
                        .setAction(() => this.deleteComment(comment))
                        .setAcceptLabel('button.delete')
                        .setI18N(this.application.i18n)
                        .show()
                },
                'bcf_delete_comment'
            )

            Controls.addText(itemListElem, comment.comment, 'bcf_comment_text')
            this.application.i18n.updateTree(itemListElem)
            commentsElem.appendChild(itemListElem)
        }
    }

    populateDocumentReferenceList() {
        const docRefs = this.docRefs
        const docRefsElem = this.docRefListElem
        docRefsElem.innerHTML = ''
        for (let docRef of docRefs) {
            let itemListElem = document.createElement('li')

            let spanElem = document.createElement('span')
            spanElem.className = 'icon doc_ref'
            itemListElem.appendChild(spanElem)

            let linkElem = document.createElement('a')
            linkElem.href = docRef.url
            linkElem.target = '_blank'
            linkElem.innerHTML = docRef.description
            itemListElem.appendChild(linkElem)

            Controls.addButton(itemListElem, 'updateDocRef', 'button.edit', () => this.editDocumentReference(docRef), 'bcf_edit_doc_ref')
            Controls.addButton(
                itemListElem,
                'deleteDocRef',
                'button.delete',
                () => {
                    ConfirmDialog.create('bim|title.delete_doc_ref', 'bim|question.delete_doc_ref')
                        .setAction(() => this.deleteDocumentReference(docRef))
                        .setAcceptLabel('button.delete')
                        .setI18N(this.application.i18n)
                        .show()
                },
                'bcf_delete_doc_ref'
            )

            this.application.i18n.updateTree(itemListElem)
            docRefsElem.appendChild(itemListElem)
        }
    }

    populateViewpointList() {
        let projectId = this.getProjectId()
        let topicGuid = this.guidElem.value

        const viewpoints = this.viewpoints
        const viewpointsElem = this.viewpointListElem
        viewpointsElem.innerHTML = ''
        for (let viewpoint of viewpoints) {
            let itemListElem = document.createElement('li')

            let spanElem = document.createElement('span')
            spanElem.className = 'icon viewpoint'
            itemListElem.appendChild(spanElem)

            let vpType = ''
            if (viewpoint.perspective_camera) {
                vpType = ' (P)'
            } else if (viewpoint.orthogonal_camera) {
                vpType += ' (O)'
            }
            Controls.addTextWithArgs(itemListElem, 'bim|message.viewpoint', [viewpoint.index || '', vpType], 'bcf_viewpoint_text')
            Controls.addButton(itemListElem, 'showViewpoint', 'button.view', () => this.showViewpoint(viewpoint), 'bcf_show_viewpoint')

            Controls.addButton(
                itemListElem,
                'deleteViewpoint',
                'button.delete',
                () => {
                    ConfirmDialog.create('bim|title.delete_viewpoint', 'bim|question.delete_viewpoint')
                        .setAction(() => this.deleteViewpoint(viewpoint))
                        .setAcceptLabel('button.delete')
                        .setI18N(this.application.i18n)
                        .show()
                },
                'bcf_delete_viewpoint'
            )
            this.application.i18n.updateTree(itemListElem)

            if (viewpoint.snapshot) {
                let type = viewpoint.snapshot.snapshot_type
                let data = viewpoint.snapshot.snapshot_data

                let source
                if (data) {
                    source = type === 'png' ? 'data:image/png;base64,' + data : 'data:image/jpeg;base64,' + data
                } else {
                    source = this.service.url + '/bcf/2.1/projects/' + projectId + '/topics/' + topicGuid + '/viewpoints/' + viewpoint.guid + '/snapshot'
                }

                let linkElem = Controls.addLink(itemListElem, null, '#', 'bim|label.zoom_image', 'viewpoint_snapshot', () => this.zoomSnapshot(source))

                let imageElem = document.createElement('img')
                imageElem.className = 'viewpoint_snapshot'
                imageElem.src = source
                linkElem.appendChild(imageElem)
            }
            viewpointsElem.appendChild(itemListElem)
        }
    }

    zoomSnapshot(source) {
        const dialog = new Dialog('bim|title.viewpoint')
        dialog.setI18N(this.application.i18n)
        dialog.setClassName('viewpoint_dialog')

        let imageElem = document.createElement('img')
        imageElem.className = 'snapshot_zoom'
        imageElem.src = source
        imageElem.onload = () => {
            const container = this.application.container

            let imageWidth = imageElem.width
            let imageHeight = imageElem.height

            let imageAspectRatio = imageWidth / imageHeight
            let screenAspectRatio = container.clientWidth / container.clientHeight

            if (imageAspectRatio > screenAspectRatio) {
                let width = container.clientWidth
                dialog.setSize(width, width / imageAspectRatio + 100)
            } else {
                let height = container.clientHeight
                dialog.setSize((height - 100) * imageAspectRatio, height)
            }

            let acceptButton = dialog.addButton('accept', 'button.close', () => {
                dialog.hide()
            })

            dialog.onShow = () => acceptButton.focus()

            dialog.show()
        }
        dialog.bodyElem.appendChild(imageElem)
    }

    populateExtensions() {
        const ext = this.extensions

        Controls.setSelectOptions(this.statusFilterElem, [''].concat(ext.topic_status))
        Controls.setSelectOptions(this.priorityFilterElem, [''].concat(ext.priority))
        Controls.setSelectOptions(this.assignedToFilterElem, [''].concat(ext.user_id_type))

        Controls.setSelectOptions(this.topicTypeElem, ext.topic_type)
        Controls.setSelectOptions(this.priorityElem, ext.priority)
        Controls.setSelectOptions(this.topicStatusElem, ext.topic_status)
        Controls.setSelectOptions(this.stageElem, ext.stage)
        Controls.setSelectOptions(this.assignedToElem, ext.user_id_type)
    }

    getProjectId() {
        let projectId = this.projectElem.value
        if (projectId === '') projectId = null

        return projectId
    }

    changeProject() {
        this.clearTopics()
        this.updateExtensions()
    }

    formatDate(dateString) {
        if (dateString === null || dateString === '') return null

        const index = dateString.indexOf('T')
        return index === -1 ? dateString : dateString.substring(0, index) + ' ' + dateString.substring(index + 1)
    }

    addTime(dateString) {
        if (dateString === null || dateString === '') return null

        return dateString + 'T00:00:00'
    }

    removeTime(dateString) {
        if (dateString === null || dateString === '') return null

        const index = dateString.indexOf('T')
        return dateString.substring(0, index)
    }

    onShow() {
        this.updateServices()
    }

    updateServices() {
        const application = this.application
        const services = application.services[this.group]
        let options = []

        for (let name in services) {
            let service = services[name]
            options.push([service.name, service.description || service.name])
        }
        Controls.setSelectOptions(this.bcfServiceElem, options)

        if (options.length > 0) {
            let name = this.bcfServiceElem.value
            this.service = application.services[this.group][name]
        } else {
            this.service = null
        }
        let service = this.service
        this.connectButton.style.display = service ? '' : 'none'
        this.addServiceButton.style.display = ''
        this.editServiceButton.style.display = service ? '' : 'none'
        this.deleteServiceButton.style.display = service ? '' : 'none'
    }

    showAddDialog() {
        let serviceTypes = ServiceManager.getTypesOf(BCFService)
        let dialog = new ServiceDialog('Add BCF service', serviceTypes)
        dialog.serviceTypeSelect.disabled = true
        dialog.setI18N(this.application.i18n)
        dialog.onSave = (serviceType, name, description, url, username, password) => {
            const service = new ServiceManager.classes[serviceType]()
            service.name = name
            service.description = description
            service.url = url
            service.username = username
            service.password = password
            this.application.addService(service, this.group)
            this.updateServices()
            this.service = service
            this.bcfServiceElem.value = name
            this.filterPanelElem.style.display = 'none'
            this.topicTableElem.style.display = 'none'
        }
        dialog.show()
    }

    showEditDialog() {
        if (this.service === null) return

        const service = this.service
        let serviceTypes = ServiceManager.getTypesOf(BCFService)
        let dialog = new ServiceDialog('Edit BCF service', serviceTypes, service.constructor.type, service.name, service.description, service.url, service.username, service.password)
        dialog.serviceTypeSelect.disabled = true
        dialog.setI18N(this.application.i18n)
        dialog.nameElem.readOnly = true
        dialog.onSave = (serviceType, name, description, url, username, password) => {
            service.description = description
            service.url = url
            service.username = username
            service.password = password
            this.application.addService(service, this.group)
            this.updateServices()
            this.filterPanelElem.style.display = 'none'
            this.topicTableElem.style.display = 'none'
        }
        dialog.show()
    }

    showDeleteDialog() {
        const application = this.application
        let name = this.bcfServiceElem.value
        if (name) {
            ConfirmDialog.create('bim|title.delete_bcf_service', 'bim|question.delete_bcf_service', name)
                .setAction(() => {
                    let service = application.services[this.group][name]
                    application.removeService(service, this.group)
                    this.updateServices()
                    this.filterPanelElem.style.display = 'none'
                    this.topicTableElem.style.display = 'none'
                })
                .setAcceptLabel('button.delete')
                .setI18N(application.i18n)
                .show()
        }
    }

    handleError(error, onLogin) {
        this.hideProgressBar()

        if (error.code === 401) {
            this.requestCredentials('message.invalid_credentials', onLogin)
        } else if (error.code === 403) {
            this.requestCredentials('message.action_denied', onLogin)
        } else {
            let message = error.message
            MessageDialog.create('ERROR', message)
                .setClassName('error')
                .setI18N(this.application.i18n)
                .show()
        }
    }

    requestCredentials(message, onLogin, onFailed) {
        const loginDialog = new LoginDialog(this.application, message)
        loginDialog.login = (username, password) => {
            this.service.username = username
            this.service.password = password
            if (onLogin) onLogin()
        }
        loginDialog.onCancel = () => {
            loginDialog.hide()
            if (onFailed) onFailed()
        }
        loginDialog.show()
    }

    showProgressBar() {
        this.application.progressBar.message = ''
        this.application.progressBar.progress = undefined
        this.application.progressBar.visible = true
    }

    hideProgressBar() {
        this.application.progressBar.visible = false
    }
}

export { BCFPanel }