import { sdk } from './sdk'
import { toRaw, ref, watch, nextTick, watchEffect, reactive } from 'vue'
import { 
  viewModeStack, 
  showLeftPanoStack, 
  custom, 
  getResource 
} from '@/env'
import { 
  mount, 
  diffArrayChange, 
  shallowWatchArray, 
  arrayChildEffectScope,
  showLoad,
  hideLoad,
  deepIsRevise,
  round,
  togetherCallback
} from '@/utils'
import { 
  dynamicAddedModelIds,
  fuseModels, 
  taggings, 
  isEdit, 
  sysBus, 
  getFuseModelShowVariable, 
  SceneType,
  MeasureType,
  measures,
  fuseModelsLoaded,
  getMeasureIsShow
} from '@/store'

import TaggingComponent from '@/components/tagging/list.vue'

import type { FuseModel, Tagging, Measure } from '@/store'
import type { 
  SDK, 
  SceneModel, 
  SceneGuidePath, 
  ModelAttrRange, 
  Measure as SceneMeasure 
} from '.'
import { SceneStatus } from '@/api'

let isUnSet = false
const unSet = ((fn: () => void) => {
  isUnSet = true
  fn()
  nextTick(() => isUnSet = false)
})


// -----------------模型关联--------------------

export const modelRange: ModelAttrRange  = {
  opacityRange: { min: 0, max: 100, step: 0.1 },
  bottomRange: { min: -30, max: 70, step: 0.1 },
  scaleRange: { min: 0, max: 200, step: 0.1 }
}

const sceneModelMap = reactive(new WeakMap<FuseModel, SceneModel>())
export const getSceneModel = (model?: FuseModel | null) => model && sceneModelMap.get(toRaw(model))

const associationModels = (sdk: SDK) => {
  const getModels = () => fuseModels.value
    .filter(model => getSceneModel(model) || getFuseModelShowVariable(model).value)
  
  shallowWatchArray(getModels, (models, oldModels) => {
    const { added, deleted } = diffArrayChange(models, oldModels)
    for (const item of added) {
      if (getSceneModel(item)) {
        continue;
      }

      if (item.status !== SceneStatus.SUCCESS) {
        item.error = true
        item.loaded = true
        continue;
      }

      const itemRaw = toRaw(item)
      let sceneModel: SceneModel
      console.error('loaded', itemRaw)
      try {
        sceneModel = sdk.addModel({
          ...itemRaw,
          ...modelRange,
          isDynamicAdded: dynamicAddedModelIds.value.some(id => itemRaw.id === id),
          type: item.type === SceneType.SWSS ? 'laser' : item.modelType,
          url: item.type === SceneType.SWSS ? item.url : getResource(item.url)
        })
      } catch(e) {
        console.error('模型加载失败', e)
        item.error = true
        return;
      }

      sceneModelMap.set(itemRaw, sceneModel)

      let changeId: NodeJS.Timeout
      sceneModel.bus.on('transformChanged', transform => {
        clearTimeout(changeId)

        changeId = setTimeout(() => {
          transform = { ...transform }
          if (transform.rotation) {
            transform.rotation = {
              x: round(transform.rotation.x, 5),
              y: round(transform.rotation.y, 5),
              z: round(transform.rotation.z, 5),
            }
          }
          if (transform.position) {
            transform.position = {
              x: round(transform.position.x, 5),
              y: round(transform.position.y, 5),
              z: round(transform.position.z, 5),
            }
          }
          delete transform.bottom
          // if (transform.bottom) {
          //   transform.bottom = round(transform.bottom, 2)
          // }
          if (transform.scale) {
            transform.scale = round(transform.scale, 2)
          }

          const updateKeys = Object.keys(transform)
          const update: any = {}
          for (const key of updateKeys) {
            update[key] = (item as any)[key]
          }
          
          if (deepIsRevise(update, transform)) {
            unSet(() => Object.assign(item, transform))
          }
        }, 16)
      })

      sceneModel.bus.on('changeSelect', select => {
        unSet(() => {
          if (custom.currentModel === item && !select) {
            custom.currentModel = null
          } else if (custom.currentModel !== item && select) {
            custom.currentModel = item
          }
        })
      })
      showLoad()
      sceneModel.bus.on('loadDone', () => {
        item.loaded = true
        hideLoad()
      })
      sceneModel.bus.on('loadError', () => {
        item.error = true
        item.show = false
        
        custom.showModelsMap.delete(item)
        hideLoad()
      })
      sceneModel.bus.on('loadProgress', progress => item.progress = progress)
    }
    for (const item of deleted) {
      console.error('remove')
      getSceneModel(item)?.destroy()
    }
  })
  
  arrayChildEffectScope(getModels, item => {
    const stopLoadedWatch = watch(
      () => item.loaded,
      (loaded) => {
        if (loaded) {
          const modelShow = getFuseModelShowVariable(item)
          watch(
            () => item.bottom, 
            () => isUnSet || getSceneModel(item)?.changeBottom(item.bottom), 
            { immediate: true }
          )
          watch(
            () => item.opacity, 
            () => isUnSet || getSceneModel(item)?.changeOpacity(item.opacity), 
            { immediate: true }
          )
          watch(
            () => item.scale, 
            () => isUnSet || getSceneModel(item)?.changeScale(item.scale), 
            { immediate: true }
          )
          watch(
            () => item.position, 
            () => {
              if (!isUnSet) {
                getSceneModel(item)?.changePosition(item.position)
              }
            }, 
            { immediate: true }
          )
          watch(
            () => item.rotation, 
            () => {
              if (!isUnSet) {
                getSceneModel(item)?.changeRotation(item.rotation)
              }
            }, 
            { immediate: true }
          )
          watch(
            () => modelShow.value, 
            () => {
              const sceneModel = getSceneModel(item)
              if (!isUnSet && sceneModel) {
                sceneModel.changeSelect(false)
                sceneModel.changeShow(modelShow.value)
              }
            }, 
            { immediate: true }
          )

          watch(
            () => custom.currentModel === item,
            (selected) => {
              isUnSet || console.log(item.title, selected, getSceneModel(item))
              isUnSet || getSceneModel(item)?.changeSelect(selected)
            }
          )

          stopLoadedWatch()
        }
      },
      // { immediate: true }
    )
  })

  watch(() => custom.currentModel, () => {

  })
}


// -----------------热点关联--------------------

const associationTaggings = (el: HTMLDivElement) => {
  const getTaggings = () => taggings.value
  const taggingVMs = new WeakMap<Tagging, ReturnType<typeof mount>>()

  shallowWatchArray(getTaggings, (taggings, oldTaggings) => {
    const { added, deleted } = diffArrayChange(taggings, oldTaggings)
    for (const item of added) {
      taggingVMs.set(toRaw(item), mount(el, TaggingComponent, { tagging: item }))
    }
    for (const item of deleted) {
      const unMount = taggingVMs.get(toRaw(item))
      unMount && unMount()
    }
  })
}


// -----------------测量关联--------------------

const sceneMeasureMap = reactive(new WeakMap<Measure , SceneMeasure>())
export const getSceneMeasure = (measure?: Measure | null) => measure && sceneMeasureMap.get(toRaw(measure))
export const getSceneMeasureDesc = (smMeasure: SceneMeasure, measure: Measure) => {
  const length = measure.type === MeasureType.area
    ? (smMeasure as unknown as SceneMeasure<MeasureType.area>).getArea()
    : (smMeasure as unknown as SceneMeasure<MeasureType.free>).getDistance()

  return round(length.value, 2).toString()
}


export const associationMessaure = <T extends MeasureType>(smMeasure: SceneMeasure<T>, measure: Measure<T>) => {
  smMeasure.bus.on('update', ([points, modelIds]) => {
    unSet(() => measure.positions = points.map((point, i) => ({ point, modelId: modelIds[i] })))
  })
  smMeasure.bus.on('highlight', selected => unSet(() => measure.selected = selected))
}

const associationMessaures = (sdk: SDK) => {
  const getMeasures = () => measures.value.filter(getMeasureIsShow)

  shallowWatchArray(getMeasures, (measures, oldMeasures) => {
    const { added, deleted } = diffArrayChange(measures, oldMeasures)
    for (const item of added) {
      const sceneMeasure = sdk.drawMeasure(
        item.type, 
        item.positions.map(position => ({...position.point})),
        item.positions.map(position => position.modelId),
      )
      if (sceneMeasure.destroy) {
        sceneMeasureMap.set(toRaw(item), sceneMeasure)
        associationMessaure(sceneMeasure, item)
      }
    }
    for (const item of deleted) {
      const sceneMeasure = getSceneMeasure(item)
      sceneMeasure && sceneMeasure.destroy!()
      sceneMeasureMap.delete(toRaw(item))
    }
  })

  arrayChildEffectScope(getMeasures, measure => {
    watch(
      () => measure.selected, 
      (selected = false) => isUnSet || getSceneMeasure(measure)?.changeSelect(selected)
    )
    watch(
      () => measure.positions, 
      (positions) => isUnSet || getSceneMeasure(measure)?.setPositions(
        positions.map(position => ({...position.point})),
        positions.map(position => position.modelId),
      )
    )
    watch(
      () => custom.showMeasures, 
      (show) => {
        if (!isUnSet) {
          const smMeasure = getSceneMeasure(measure)
          if (show) {
            smMeasure?.show()
          } else {
            smMeasure?.hide()
          }
        }
      },
      { immediate: true }
    )
  })
}


// -----------------导览关联--------------------

const fullView = async (fn: () => void) => {
  const popViewMode = togetherCallback([
    viewModeStack.push(ref('full')),
    showLeftPanoStack.push(ref(false))
  ])
  await document.documentElement.requestFullscreen()
  const driving = () => document.fullscreenElement || fn()

  document.addEventListener('fullscreenchange', driving)
  document.addEventListener('fullscreenerror', fn)

  return () => {
    popViewMode()
    document.fullscreenElement && document.exitFullscreen()
    document.removeEventListener('fullscreenchange', driving)
    document.removeEventListener('fullscreenerror', fn)
  }
}

export const isScenePlayIng = ref(false)
export const playSceneGuide = async (paths: SceneGuidePath[], changeIndexCallback?: (index: number) => void, forceFull = false) => {
  if (isScenePlayIng.value) {
    throw new Error('导览正在播放')
  }
  isScenePlayIng.value = true

  const sceneGuide = sdk.enterSceneGuide(paths)

  changeIndexCallback && sceneGuide.bus.on('changePoint', changeIndexCallback)

  const quitHandler = () => (isScenePlayIng.value = false)
  const clearHandler = !forceFull && isEdit.value ? null : await fullView(quitHandler)
  if (!clearHandler) {
    sysBus.on('leave', quitHandler, { last: true })
    sysBus.on('save', quitHandler, { last: true })
  }

  sceneGuide.play()
  const reces = [
    new Promise(resolve => sceneGuide.bus.on('playComplete', resolve)),
    new Promise<void>(resolve => {
      const stop = watch(isScenePlayIng, () => {
        if (!isScenePlayIng.value) {
          resolve()
          sceneGuide.pause()
          stop()
        }
      })
    }),
  ]

  await Promise.race(reces)
  isScenePlayIng.value = false
  if (clearHandler) {
    clearHandler()
  } else {
    sysBus.off('leave', quitHandler)
    sysBus.off('save', quitHandler)
  }
  sceneGuide.clear()
  sceneGuide.bus.off('changePoint')
}

export const pauseSceneGuide = () => isScenePlayIng.value = false


// -----------------启动关联--------------------

export const setupAssociation = (mountEl: HTMLDivElement) => {
  associationModels(sdk)

  const stopWatch = watchEffect(() => {
    if (fuseModelsLoaded.value) {
      associationTaggings(mountEl)
      associationMessaures(sdk)
      nextTick(() => stopWatch())
    }
  })
}