(function () {
  var ctx = window.__EDITOR__ || { folder: '', video: null }
  var folder = ctx.folder
  var video = ctx.video

  var dropZone = document.getElementById('dropZone')
  var fileInput = document.getElementById('fileInput')
  var ytUrl = document.getElementById('ytUrl')
  var ytProbeBtn = document.getElementById('ytProbeBtn')
  var ytStartBtn = document.getElementById('ytStartBtn')
  var probeInfo = document.getElementById('probeInfo')
  var dlProgress = document.getElementById('downloadProgress')
  var uploadStatus = document.getElementById('uploadStatus')

  var videoPanel = document.getElementById('videoPanel')
  var editVideo = document.getElementById('editVideo')
  var titleInput = document.getElementById('titleInput')
  var startSec = document.getElementById('startSec')
  var endSec = document.getElementById('endSec')
  var saveBtn = document.getElementById('saveBtn')

  // 드래그&드롭
  ;['dragenter', 'dragover'].forEach(function (evt) {
    dropZone.addEventListener(evt, function (e) {
      e.preventDefault(); e.stopPropagation()
      dropZone.classList.add('dragOver')
    })
  })
  ;['dragleave', 'drop'].forEach(function (evt) {
    dropZone.addEventListener(evt, function (e) {
      e.preventDefault(); e.stopPropagation()
      dropZone.classList.remove('dragOver')
    })
  })
  dropZone.addEventListener('drop', function (e) {
    var files = e.dataTransfer && e.dataTransfer.files
    if (files && files.length > 0) uploadFile(files[0])
  })
  fileInput.addEventListener('change', function () {
    if (fileInput.files && fileInput.files[0]) uploadFile(fileInput.files[0])
  })

  function uploadFile(file) {
    var form = new FormData()
    form.append('file', file)
    form.append('title', titleInput.value || file.name)
    uploadStatus.textContent = '업로드 중...'
    var xhr = new XMLHttpRequest()
    xhr.open('POST', '/op/folder/' + encodeURIComponent(folder) + '/video/upload')
    xhr.upload.addEventListener('progress', function (e) {
      if (e.lengthComputable) {
        var pct = Math.round((e.loaded / e.total) * 100)
        uploadStatus.textContent = '업로드 ' + pct + '%'
      }
    })
    xhr.onload = function () {
      try {
        var res = JSON.parse(xhr.responseText)
        if (res.ok) {
          location.href = '/op/folder/' + encodeURIComponent(folder) + '/video/editor?id=' + encodeURIComponent(res.videoId)
        } else {
          uploadStatus.textContent = '업로드 실패: ' + (res.message || '')
        }
      } catch (err) {
        uploadStatus.textContent = '업로드 실패'
      }
    }
    xhr.onerror = function () { uploadStatus.textContent = '업로드 실패 (네트워크)' }
    xhr.send(form)
  }

  // YouTube probe
  ytProbeBtn.addEventListener('click', function () {
    var url = ytUrl.value.trim()
    if (!url) return
    probeInfo.textContent = '확인 중...'
    ytStartBtn.disabled = true
    fetch('/op/folder/' + encodeURIComponent(folder) + '/video/youtube/probe', {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ url: url })
    }).then(function (r) { return r.json() }).then(function (j) {
      if (!j.ok) {
        probeInfo.textContent = j.message || '확인 실패'
        return
      }
      var p = j.probe
      var parts = [
        '제목: ' + p.title,
        '길이: ' + formatDuration(p.durationSec)
      ]
      if (p.filesizeApprox) parts.push('대략 ' + formatSize(p.filesizeApprox))
      if (p.etaSec) parts.push('예상 다운로드: ' + formatDuration(p.etaSec))
      probeInfo.textContent = parts.join(' · ')
      if (p.warnOver5min) {
        if (!window.confirm('가져오는 데 5분 이상 걸릴 수 있습니다. 진행할까요?\n(다른 페이지에서 작업해도 백그라운드로 계속 진행됩니다.)')) {
          return
        }
      }
      if (!titleInput.value) titleInput.value = p.title
      ytStartBtn.disabled = false
    }).catch(function (e) {
      probeInfo.textContent = '확인 실패: ' + e.message
    })
  })

  ytStartBtn.addEventListener('click', function () {
    var url = ytUrl.value.trim()
    if (!url) return
    fetch('/op/folder/' + encodeURIComponent(folder) + '/video/youtube/start', {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ url: url, title: titleInput.value })
    }).then(function (r) { return r.json() }).then(function (j) {
      if (!j.ok) {
        probeInfo.textContent = j.message || '시작 실패'
        return
      }
      dlProgress.hidden = false
      probeInfo.textContent = '백그라운드 다운로드 시작...'
      pollJob(j.jobId, j.videoId)
    })
  })

  function pollJob(jobId, videoId) {
    // cache: 'no-store' 로 304 가 나지 않게 강제. 304 면 body 가 비어
    // r.json() 이 reject → 폴링 중단되는 문제 방지.
    fetch('/op/job/' + encodeURIComponent(jobId), { cache: 'no-store' })
      .then(function (r) { return r.json() })
      .then(function (j) {
        if (!j.ok) {
          probeInfo.textContent = j.message || '작업을 찾을 수 없음'
          return
        }
        var job = j.job
        dlProgress.value = job.progress
        probeInfo.textContent = job.message
        if (job.status === 'done') {
          location.href = '/op/folder/' + encodeURIComponent(folder) + '/video/editor?id=' + encodeURIComponent(videoId)
        } else if (job.status === 'error') {
          probeInfo.textContent = '실패: ' + (job.error || '')
        } else {
          setTimeout(function () { pollJob(jobId, videoId) }, 1500)
        }
      })
      .catch(function (err) {
        // 네트워크 일시 오류로 폴링이 영구 중단되지 않도록 짧게 백오프 후 재시도.
        console.warn('[pollJob] fetch 실패, 재시도:', err)
        setTimeout(function () { pollJob(jobId, videoId) }, 2000)
      })
  }

  // ── 타임라인 트림 (lossless-cut 류 핸들 UI) ─────────────────────────
  var trimBar = document.getElementById('trimBar')
  var trimHandleStart = document.getElementById('trimHandleStart')
  var trimHandleEnd = document.getElementById('trimHandleEnd')
  var trimRangeFill = document.getElementById('trimRangeFill')
  var trimPlayhead = document.getElementById('trimPlayhead')
  var timeReadout = document.getElementById('timeReadout')
  var trimDuration = document.getElementById('trimDuration')

  var duration = 0
  var trimStart = video && video.trim ? Number(video.trim.startSec) || 0 : 0
  // trimEnd 가 null 이면 "끝까지" 의미
  var trimEnd = video && video.trim && video.trim.endSec != null ? Number(video.trim.endSec) : null
  var MIN_SELECTION = 0.05

  function clamp(v, lo, hi) { return Math.min(hi, Math.max(lo, v)) }
  function effectiveEnd() { return trimEnd != null ? trimEnd : duration }

  function formatTime(sec) {
    if (!isFinite(sec) || sec < 0) sec = 0
    var m = Math.floor(sec / 60)
    var s = sec - m * 60
    var sStr = s.toFixed(1)
    if (s < 10) sStr = '0' + sStr
    return (m < 10 ? '0' + m : '' + m) + ':' + sStr
  }

  function renderTimeline() {
    if (!duration || !trimBar) return
    var end = effectiveEnd()
    var startPct = (trimStart / duration) * 100
    var endPct = (end / duration) * 100
    trimRangeFill.style.left = startPct + '%'
    trimRangeFill.style.width = Math.max(0, endPct - startPct) + '%'
    trimHandleStart.style.left = startPct + '%'
    trimHandleEnd.style.left = endPct + '%'
    var cur = editVideo ? editVideo.currentTime : 0
    trimPlayhead.style.left = clamp((cur / duration) * 100, 0, 100) + '%'
    timeReadout.textContent = formatTime(cur) + ' / ' + formatTime(duration)
    trimDuration.textContent = '선택: ' + (end - trimStart).toFixed(1) + '초'
    // 숫자 입력 동기화
    startSec.value = trimStart.toFixed(2)
    endSec.value = trimEnd == null ? '' : trimEnd.toFixed(2)
  }

  function applyMetadata() {
    var d = editVideo.duration
    if (!d || !isFinite(d) || d <= 0) return
    duration = d
    // 잘못 저장돼있던 값 보정
    trimStart = clamp(trimStart, 0, Math.max(0, duration - MIN_SELECTION))
    if (trimEnd != null) trimEnd = clamp(trimEnd, trimStart + MIN_SELECTION, duration)
    renderTimeline()
  }

  if (editVideo) {
    // 스크립트가 loadedmetadata 이후에 실행되는 경우 (인라인 src) 도 커버.
    if (editVideo.readyState >= 1) applyMetadata()
    editVideo.addEventListener('loadedmetadata', applyMetadata)
    editVideo.addEventListener('durationchange', applyMetadata)
    editVideo.addEventListener('timeupdate', renderTimeline)
    editVideo.addEventListener('seeked', renderTimeline)
  }

  function clientXtoTime(clientX) {
    var rect = trimBar.getBoundingClientRect()
    var ratio = clamp((clientX - rect.left) / rect.width, 0, 1)
    return ratio * duration
  }

  function attachHandle(handle, which) {
    handle.addEventListener('pointerdown', function (e) {
      if (!duration) return
      e.preventDefault()
      handle.setPointerCapture(e.pointerId)
      handle.classList.add('dragging')
      function onMove(ev) {
        var t = clientXtoTime(ev.clientX)
        if (which === 'start') {
          trimStart = clamp(t, 0, effectiveEnd() - MIN_SELECTION)
        } else {
          trimEnd = clamp(t, trimStart + MIN_SELECTION, duration)
        }
        renderTimeline()
      }
      function onUp() {
        handle.classList.remove('dragging')
        handle.removeEventListener('pointermove', onMove)
        handle.removeEventListener('pointerup', onUp)
        handle.removeEventListener('pointercancel', onUp)
      }
      handle.addEventListener('pointermove', onMove)
      handle.addEventListener('pointerup', onUp)
      handle.addEventListener('pointercancel', onUp)
    })
  }
  if (trimBar) {
    attachHandle(trimHandleStart, 'start')
    attachHandle(trimHandleEnd, 'end')

    // 타임라인 빈 공간 클릭 → 그 지점으로 시킹
    trimBar.addEventListener('pointerdown', function (e) {
      if (!duration || !editVideo) return
      var tgt = e.target
      if (tgt && (tgt === trimHandleStart || tgt === trimHandleEnd)) return
      editVideo.currentTime = clientXtoTime(e.clientX)
    })
  }

  // 시작/끝 마크 버튼
  document.querySelectorAll('[data-mark]').forEach(function (btn) {
    btn.addEventListener('click', function () {
      if (!editVideo || !duration) return
      var t = editVideo.currentTime
      if (btn.getAttribute('data-mark') === 'start') {
        trimStart = clamp(t, 0, effectiveEnd() - MIN_SELECTION)
      } else {
        trimEnd = clamp(t, trimStart + MIN_SELECTION, duration)
      }
      renderTimeline()
    })
  })

  // 초기화 / 선택 재생
  var playSelectionStopHandler = null
  document.querySelectorAll('[data-action]').forEach(function (btn) {
    btn.addEventListener('click', function () {
      var action = btn.getAttribute('data-action')
      if (action === 'reset') {
        trimStart = 0; trimEnd = null
        renderTimeline()
      } else if (action === 'playSelection') {
        if (!editVideo || !duration) return
        editVideo.currentTime = trimStart
        editVideo.play()
        if (playSelectionStopHandler) editVideo.removeEventListener('timeupdate', playSelectionStopHandler)
        playSelectionStopHandler = function () {
          if (editVideo.currentTime >= effectiveEnd() - 0.02) {
            editVideo.pause()
            editVideo.removeEventListener('timeupdate', playSelectionStopHandler)
            playSelectionStopHandler = null
          }
        }
        editVideo.addEventListener('timeupdate', playSelectionStopHandler)
      }
    })
  })

  // 숫자 입력 → 상태로 반영
  startSec.addEventListener('change', function () {
    var v = Number(startSec.value || 0)
    if (!isFinite(v) || v < 0) v = 0
    trimStart = clamp(v, 0, duration ? effectiveEnd() - MIN_SELECTION : v)
    renderTimeline()
  })
  endSec.addEventListener('change', function () {
    if (endSec.value === '') {
      trimEnd = null
    } else {
      var v = Number(endSec.value)
      if (!isFinite(v) || v <= trimStart) { renderTimeline(); return }
      trimEnd = duration ? clamp(v, trimStart + MIN_SELECTION, duration) : v
    }
    renderTimeline()
  })

  // 저장
  saveBtn.addEventListener('click', function () {
    if (!video) { alert('먼저 영상을 추가하세요.'); return }
    var payload = {
      id: video.id,
      title: titleInput.value,
      startSec: trimStart,
      endSec: trimEnd
    }
    saveBtn.disabled = true
    saveBtn.textContent = '저장 중...'
    fetch('/op/folder/' + encodeURIComponent(folder) + '/video/save', {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify(payload)
    }).then(function (r) { return r.json() }).then(function (j) {
      saveBtn.disabled = false
      saveBtn.textContent = '저장'
      if (j.ok) {
        alert(j.note || '저장 완료')
        location.href = '/op/folder/' + encodeURIComponent(folder)
      } else {
        alert(j.message || '저장 실패')
      }
    })
  })

  function formatDuration(sec) {
    if (!sec || sec <= 0) return '0초'
    var s = Math.round(sec)
    var h = Math.floor(s / 3600); s = s % 3600
    var m = Math.floor(s / 60); s = s % 60
    if (h > 0) return h + '시간 ' + m + '분 ' + s + '초'
    if (m > 0) return m + '분 ' + s + '초'
    return s + '초'
  }
  function formatSize(bytes) {
    if (bytes < 1024) return bytes + ' B'
    if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB'
    if (bytes < 1024 * 1024 * 1024) return (bytes / 1024 / 1024).toFixed(1) + ' MB'
    return (bytes / 1024 / 1024 / 1024).toFixed(2) + ' GB'
  }
})()