import { state, initState } from './state'
import { invalidateBounds, updateTimeline } from './timeline'
import { setupControls, showControls } from './controls'
import { setupKeyboard } from './keyboard'
import { setupSubtitles, updateSubtitleOptions, updateSubtitleRender } from './subtitles'
import { setupSkip, updateSkipButton, updateAutoSkipButton } from './skip'
import { setupQuality, updateQualityOptions } from './quality'
import { setupMode, updateModeButtons } from './mode'
import { setupAutoplayButton, updateEpisodeHighlight, switchEpisodeRange } from './episodes/ui'
import { goToNextEpisode } from './episodes/nav'
import { resolveActiveSegments, renderSegments } from './skip/segments'
import { setupThumbnails } from './episodes/thumbnails'
import { markEpisodeTransition, setupProgress } from './progress'
import { absoluteTimeFromRatio, getBounds, displayTimeFromAbsolute } from './timeline'
import { formatTime } from './controls'

let initialized = false

const hidePreviewPopover = (): void => {
  state.previewPopover?.classList.remove('block')
  state.previewPopover?.classList.add('hidden')
  state.previewPopover!.style.left = '0px'
}

const showPreviewPopover = (): void => {
  state.previewPopover?.classList.remove('hidden')
  state.previewPopover?.classList.add('block')
}

const updatePreviewUI = (ratio: number): void => {
  const progressWrap = state.container.querySelector('[data-progress-wrap]') as HTMLElement | null
  if (!progressWrap || !state.previewPopover || !state.previewTime) { hidePreviewPopover(); return }
  const b = getBounds()
  if (b.duration <= 0) { hidePreviewPopover(); return }

  state.previewTime.textContent = formatTime(Math.max(0, Math.min(b.duration, ratio * b.duration)))

  const barWidth = progressWrap.clientWidth
  if (barWidth <= 0) { hidePreviewPopover(); return }

  showPreviewPopover()
  const popoverWidth = state.previewPopover.offsetWidth || 72
  state.previewPopover.style.left = `${Math.max(popoverWidth / 2, Math.min(barWidth - popoverWidth / 2, ratio * barWidth))}px`
}

const initPlayer = (): void => {
  const container = document.querySelector('[data-video-player]') as HTMLElement | null
  if (!container || initialized) return
  initialized = true

  initState(container)

  const loading = container.querySelector('[data-loading]') as HTMLElement | null
  const progressWrap = container.querySelector('[data-progress-wrap]') as HTMLElement | null

  const preferredQuality = localStorage.getItem('mal:preferred-quality') || 'best'
  const streamToken = state.modeSources[state.currentMode]?.token
  if (streamToken) {
    state.video.src = `${state.streamURL}?mode=${encodeURIComponent(state.currentMode)}&token=${encodeURIComponent(streamToken)}${preferredQuality !== 'best' ? `&quality=${encodeURIComponent(preferredQuality)}` : ''}`
  }

  setupProgress()
  setupControls()
  setupKeyboard()
  setupSkip()
  setupSubtitles()
  setupQuality()
  setupMode()

  updateSubtitleOptions()
  updateQualityOptions()
  updateModeButtons()
  setupAutoplayButton()
  updateAutoSkipButton()
  showControls()

  state.video.addEventListener('loadedmetadata', () => {
    loading && (loading.style.display = 'none')
    invalidateBounds()

    resolveActiveSegments()
    renderSegments()

    const startTime = Number(container.dataset.startTimeSeconds ?? '0')
    if (startTime > 0 && state.video.currentTime <= 0.5 && state.video.duration > startTime) {
      state.video.currentTime = startTime
    }
    if (state.pendingSeekTime !== null) {
      state.video.currentTime = state.pendingSeekTime
      state.pendingSeekTime = null
    }
    if (state.shouldAutoPlay) state.video.play().catch(() => {})

    updateTimeline(state.video.currentTime)
    updateSkipButton(state.video.currentTime)
  })

  state.video.addEventListener('waiting', () => { loading && (loading.style.display = 'flex') })
  state.video.addEventListener('playing', () => { loading && (loading.style.display = 'none') })
  state.video.addEventListener('progress', () => { updateTimeline(state.video.currentTime) })

  state.video.addEventListener('timeupdate', () => {
    updateTimeline(state.video.currentTime)
    updateSubtitleRender(displayTimeFromAbsolute(state.video.currentTime))
    updateSkipButton(state.video.currentTime)
  })

  state.video.addEventListener('ended', () => { goToNextEpisode() })

  progressWrap?.addEventListener('mousedown', (e) => {
    state.isScrubbing = true
    const rect = progressWrap.getBoundingClientRect()
    state.video.currentTime = absoluteTimeFromRatio(Math.max(0, Math.min(1, (e.clientX - rect.left) / rect.width)))
    updateTimeline(state.video.currentTime)
    updateSkipButton(state.video.currentTime)
    showControls()
  })

  progressWrap?.addEventListener('mousemove', (e) => {
    const rect = progressWrap.getBoundingClientRect()
    updatePreviewUI(Math.max(0, Math.min(1, (e.clientX - rect.left) / rect.width)))
  })

  progressWrap?.addEventListener('mouseleave', hidePreviewPopover)

  window.addEventListener('mousemove', (e) => {
    if (!state.isScrubbing || !progressWrap) return
    const rect = progressWrap.getBoundingClientRect()
    state.video.currentTime = absoluteTimeFromRatio(Math.max(0, Math.min(1, (e.clientX - rect.left) / rect.width)))
    updateTimeline(state.video.currentTime)
    updateSkipButton(state.video.currentTime)
  })

  container.addEventListener('click', (e) => {
    const anchor = (e.target as Node).parentElement?.closest('a[href]')
    if (!(anchor instanceof HTMLAnchorElement)) return
    const parts = new URL(anchor.href, location.origin).pathname.split('/').filter(Boolean)
    if (parts[0] === 'watch' && Number.parseInt(parts[2], 10) > 0) {
      markEpisodeTransition(Number.parseInt(parts[2], 10))
    }
  })

  state.video.addEventListener('click', showControls)

  const searchInput = document.querySelector('[data-episode-search]') as HTMLInputElement | null
  const dropdown = container.querySelector('[data-episode-dropdown]') as HTMLElement | null
  let searchDebounce: number | undefined

  if (searchInput) {
    searchInput.addEventListener('input', () => {
      clearTimeout(searchDebounce)
      searchDebounce = window.setTimeout(() => {
        const val = searchInput.value.replace(/\D/g, '')
        if (!val) {
          const cur = Number.parseInt(state.currentEpisode, 10)
          switchEpisodeRange(Math.floor((cur - 1) / 100))
          updateEpisodeHighlight(cur)
          return
        }
        const ep = Number.parseInt(val, 10)
        if (!ep || ep <= 0) return
        const maxEp = state.totalEpisodes > 0 ? state.totalEpisodes : 500
        const clamped = Math.min(ep, maxEp)
        searchInput.value = String(clamped)
        if (state.episodeGrid) {
          switchEpisodeRange(Math.floor((clamped - 1) / 100))
          updateEpisodeHighlight(clamped)
        }
      }, 300)
    })
  }

  if (dropdown) {
    dropdown.querySelectorAll('.episode-range-btn').forEach(btn => {
      btn.addEventListener('click', () => {
        const idx = Number.parseInt((btn as HTMLElement).dataset.rangeIndex ?? '0', 10)
        switchEpisodeRange(idx)
      })
    })
  }

  if (state.episodeGrid && state.totalEpisodes > 100) {
    switchEpisodeRange(Math.floor((Number.parseInt(state.currentEpisode, 10) - 1) / 100))
  }

  setupThumbnails()
}

document.addEventListener('DOMContentLoaded', initPlayer)
document.body.addEventListener('htmx:afterSwap', (e: Event) => {
  const target = (e as CustomEvent).detail?.target as HTMLElement | null
  if (target?.querySelector('[data-video-player]')) initPlayer()
})