/*
 * Brain4itWatchController.js
 *
 * @author realor
 */

import { Controller } from './Controller.js'
import { Brain4it } from '../lib/Brain4it.js'

Brain4it.monitors = {}

class Brain4itWatchController extends Controller {
    constructor(object, name) {
        super(object, name)

        this.url = ''
        this.module = 'your_module'
        this.accessKey = 'access_key'
        this.func = '@function_to_call'
        this.output = 0
        this.autoStart = false

        this._monitor = null
        this._functionKey = null
        this._callback = this.callback.bind(this)
        this._onNodeChanged = this.onNodeChanged.bind(this)
    }

    onStart() {
        this.application.addEventListener('scene', this._onNodeChanged)
        this.watch()
    }

    onStop() {
        this.application.removeEventListener('scene', this._onNodeChanged)
        this.unwatch()
    }

    onNodeChanged(event) {
        if (event.type === 'nodeChanged' && this.hasChanged(event)) {
            this.watch()
        }
    }

    callback(name, value) {
        console.info('MONITOR ' + name + ' = ' + value)
        this.output = value
        this.application.notifyObjectsChanged(this.object, this)
    }

    watch() {
        let url = this.url
        if (url.trim().length === 0) return

        if (url[0] === '/') {
            url = document.location.protocol + '//' + document.location.host + url
        }
        let module = this.module
        let accessKey = this.accessKey || ''
        let func = this.func
        let moduleKey = url + '/' + module + '/' + accessKey
        let functionKey = moduleKey + '/' + func

        if (functionKey !== this._functionKey) {
            this.unwatch()

            let monitor = Brain4it.monitors[moduleKey]
            if (monitor === undefined) {
                monitor = new Brain4it.Monitor(url, module, accessKey)
                Brain4it.monitors[moduleKey] = monitor
            }

            this._monitor = monitor
            this._functionKey = functionKey
            this._func = func
            console.info('WATCH', func)
            monitor.watch(this._func, this._callback)
        }
    }

    unwatch() {
        if (this._monitor) {
            console.info('UNWATCH')
            this._monitor.unwatch(this._func, this._callback)
            this._monitor = null
            this._functionKey = null
            this._func = null
        }
    }
}

Controller.addClass(Brain4itWatchController)

export { Brain4itWatchController }