const Logger = require('../Logger')
const AudioBookmark = require('./AudioBookmark')

class AudiobookProgress {
  constructor(progress) {
    this.audiobookId = null

    this.id = null
    this.totalDuration = null // seconds
    this.progress = null // 0 to 1
    this.currentTime = null // seconds
    this.isRead = false
    this.lastUpdate = null
    this.startedAt = null
    this.finishedAt = null
    this.bookmarks = []

    if (progress) {
      this.construct(progress)
    }
  }

  bookmarksToJSON() {
    if (!this.bookmarks) return []
    return this.bookmarks.filter((b) => {
      if (!b.toJSON) {
        Logger.error(`[AudiobookProgress] Invalid bookmark ${JSON.stringify(b)}`)
        return false
      }
      return true
    }).map(b => b.toJSON())
  }

  toJSON() {
    return {
      audiobookId: this.audiobookId,
      totalDuration: this.totalDuration,
      progress: this.progress,
      currentTime: this.currentTime,
      isRead: this.isRead,
      lastUpdate: this.lastUpdate,
      startedAt: this.startedAt,
      finishedAt: this.finishedAt,
      bookmarks: this.bookmarksToJSON()
    }
  }

  construct(progress) {
    this.audiobookId = progress.audiobookId
    this.totalDuration = progress.totalDuration
    this.progress = progress.progress
    this.currentTime = progress.currentTime
    this.isRead = !!progress.isRead
    this.lastUpdate = progress.lastUpdate
    this.startedAt = progress.startedAt
    this.finishedAt = progress.finishedAt || null
    if (progress.bookmarks) {
      this.bookmarks = progress.bookmarks.map(b => new AudioBookmark(b))
    } else {
      this.bookmarks = []
    }
  }

  updateFromStream(stream) {
    this.audiobookId = stream.audiobookId
    this.totalDuration = stream.totalDuration
    this.progress = stream.clientProgress
    this.currentTime = stream.clientCurrentTime
    this.lastUpdate = Date.now()

    if (!this.startedAt) {
      this.startedAt = Date.now()
    }

    // If has < 10 seconds remaining mark as read
    var timeRemaining = this.totalDuration - this.currentTime
    if (timeRemaining < 10) {
      this.isRead = true
      this.progress = 1
      this.finishedAt = Date.now()
    } else {
      this.isRead = false
      this.finishedAt = null
    }
  }

  update(payload) {
    var hasUpdates = false
    Logger.debug(`[AudiobookProgress] Update called ${JSON.stringify(payload)}`)
    for (const key in payload) {
      if (payload[key] !== this[key]) {
        if (key === 'isRead') {
          if (!payload[key]) { // Updating to Not Read - Reset progress and current time
            this.finishedAt = null
            this.progress = 0
            this.currentTime = 0
          } else { // Updating to Read
            if (!this.finishedAt) this.finishedAt = Date.now()
            this.progress = 1
          }
        }

        this[key] = payload[key]
        hasUpdates = true
      }
    }
    if (!this.startedAt) {
      this.startedAt = Date.now()
    }
    if (hasUpdates) {
      this.lastUpdate = Date.now()
    }
    return hasUpdates
  }

  checkBookmarkExists(time) {
    return this.bookmarks.find(bm => bm.time === time)
  }

  createBookmark(time, title) {
    var newBookmark = new AudioBookmark()
    newBookmark.setData(time, title)
    this.bookmarks.push(newBookmark)
    return newBookmark
  }

  updateBookmark(time, title) {
    var bookmark = this.bookmarks.find(bm => bm.time === time)
    if (!bookmark) return false
    bookmark.title = title
    return bookmark
  }

  deleteBookmark(time) {
    this.bookmarks = this.bookmarks.filter(bm => bm.time !== time)
  }
}
module.exports = AudiobookProgress