'use strict'

const api = window.rpInstaller

const state = {
  packs: [],
  selectedKey: null,
  installing: false,
  installed: false,
  resourcepackPath: ''
}

const pageHost = document.getElementById('pageHost')
const stepIndicator = document.getElementById('stepIndicator')
const logViewer = document.getElementById('logViewer')
const logBody = document.getElementById('logBody')
const logToggle = document.getElementById('logToggle')

logToggle.addEventListener('click', function () {
  logViewer.classList.toggle('collapsed')
  if (logViewer.classList.contains('collapsed')) {
    logViewer.style.height = '36px'
    logToggle.textContent = '펼치기'
  } else {
    logViewer.style.height = ''
    logToggle.textContent = '접기'
  }
})

api.onLog(function (line) {
  logViewer.hidden = false
  logBody.textContent += line + '\n'
  logBody.scrollTop = logBody.scrollHeight
})

function setActiveStep(step) {
  stepIndicator.querySelectorAll('li').forEach(function (item) {
    var index = Number(item.getAttribute('data-step'))
    item.classList.remove('active', 'done')
    if (index < step) item.classList.add('done')
    if (index === step) item.classList.add('active')
  })
}

function clearPage() { pageHost.innerHTML = '' }

// ── 1단계: 음악퀴즈 선택 ────────────────────────────
function renderStep1() {
  setActiveStep(1)
  clearPage()
  var section = document.createElement('section')
  section.className = 'page'
  section.innerHTML =
    '<h2>1단계. 음악퀴즈 선택</h2>' +
    '<div id="packList" class="cardChoice"><p class="formMessage">목록을 불러오는 중...</p></div>' +
    '<div class="actionRow"><span></span><button class="primaryBtn" id="next" disabled>다음</button></div>'
  pageHost.appendChild(section)
  var listEl = section.querySelector('#packList')
  var nextBtn = section.querySelector('#next')

  function renderList() {
    listEl.innerHTML = ''
    if (state.packs.length === 0) {
      listEl.innerHTML = '<p class="formMessage error">등록된 음악퀴즈가 없습니다.</p>'
      return
    }
    state.packs.forEach(function (pack) {
      var card = document.createElement('button')
      card.type = 'button'
      card.className = 'choiceCard'
      if (state.selectedKey === pack.key) card.classList.add('active')
      var verLabel = pack.mcVersion ? '마인크래프트 ' + escapeHtml(pack.mcVersion) + ' · ' : ''
      card.innerHTML =
        '<strong>' + escapeHtml(pack.name) + '</strong>' +
        '<small>' + verLabel +
        '음악 ' + pack.list.music.length + '곡 · 사진 ' + pack.list.images.length + '장</small>'
      card.addEventListener('click', function () {
        state.selectedKey = pack.key
        nextBtn.disabled = false
        renderList()
      })
      listEl.appendChild(card)
    })
  }

  nextBtn.addEventListener('click', function () {
    if (!state.selectedKey) return
    api.selectPack(state.selectedKey).then(function () {
      renderStep2()
    }).catch(function (err) {
      alert(err.message || '선택 실패')
    })
  })

  api.loadPacks().then(function (packs) {
    state.packs = packs || []
    renderList()
  }).catch(function (err) {
    listEl.innerHTML = '<p class="formMessage error">목록 로드 실패: ' + escapeHtml(err.message || '') + '</p>'
  })
}

// ── 2단계: 설치 진행 ────────────────────────────────
function renderStep2() {
  setActiveStep(2)
  clearPage()

  var pack = null
  for (var i = 0; i < state.packs.length; i++) {
    if (state.packs[i].key === state.selectedKey) { pack = state.packs[i]; break }
  }
  var musicTotal = pack ? pack.list.music.length : 0
  var imageTotal = pack ? pack.list.images.length : 0

  var section = document.createElement('section')
  section.className = 'page'
  section.innerHTML =
    '<h2>2단계. 리소스팩 설치</h2>' +
    '<p class="formMessage">음악·사진을 받아 리소스팩을 만들고 ' +
    '<code>%appdata%/.minecraft/resourcepacks/</code> 에 자동 설치합니다.</p>' +
    '<div class="prepRow">' +
    '  <span class="prepChip" id="chip-ytdlp">yt-dlp 준비</span>' +
    '  <span class="prepChip" id="chip-ffmpeg">ffmpeg 준비</span>' +
    '</div>' +
    '<div class="progressSection">' +
    '  <h3>음악 다운로드</h3>' +
    '  <div class="sectionSub" id="music-sub">' + musicTotal + '곡</div>' +
    '  <div class="progressGrid" id="musicGrid"></div>' +
    '</div>' +
    '<div class="progressSection">' +
    '  <h3>사진 다운로드</h3>' +
    '  <div class="sectionSub" id="image-sub">' + imageTotal + '장</div>' +
    '  <div class="progressGrid" id="imageGrid"></div>' +
    '</div>' +
    '<div class="progressSection">' +
    '  <h3>리소스팩 빌드</h3>' +
    '  <div class="sectionSub" id="pkg-sub">대기 중…</div>' +
    '</div>' +
    '<div class="actionRow">' +
    '  <span></span>' +
    '  <button class="dangerBtn" id="cancel">취소</button>' +
    '</div>'
  pageHost.appendChild(section)

  var musicGrid = section.querySelector('#musicGrid')
  var imageGrid = section.querySelector('#imageGrid')
  var chipYtdlp = section.querySelector('#chip-ytdlp')
  var chipFfmpeg = section.querySelector('#chip-ffmpeg')
  var pkgSub = section.querySelector('#pkg-sub')
  var cancelBtn = section.querySelector('#cancel')

  function buildCard(idx) {
    var card = document.createElement('div')
    card.className = 'progressCard pending'
    card.setAttribute('data-idx', String(idx))
    card.innerHTML =
      '<div class="cardTop"><span class="label">' + idx + '</span><span class="icon">○</span></div>' +
      '<div class="bar"><span></span></div>' +
      '<div class="pct">대기</div>'
    return card
  }
  for (var m = 1; m <= musicTotal; m++) musicGrid.appendChild(buildCard(m))
  for (var k = 1; k <= imageTotal; k++) imageGrid.appendChild(buildCard(k))

  function updateCard(grid, index, percent, status) {
    var card = grid.querySelector('[data-idx="' + index + '"]')
    if (!card) return
    card.classList.remove('pending', 'running', 'done', 'error')
    card.classList.add(status)
    var bar = card.querySelector('.bar > span')
    if (bar) bar.style.width = Math.max(0, Math.min(100, percent)) + '%'
    var pct = card.querySelector('.pct')
    var icon = card.querySelector('.icon')
    if (status === 'done') {
      if (pct) pct.textContent = '완료'
      if (icon) icon.textContent = '✓'
      if (bar) bar.style.width = '100%'
    } else if (status === 'error') {
      if (pct) pct.textContent = '실패'
      if (icon) icon.textContent = '✕'
    } else if (status === 'running') {
      if (pct) pct.textContent = Math.round(percent) + '%'
      if (icon) icon.textContent = '⏳'
    } else {
      if (pct) pct.textContent = '대기'
      if (icon) icon.textContent = '○'
    }
  }

  var stopProgress = api.onProgress(function (payload) {
    if (!payload || typeof payload !== 'object') return
    if (payload.phase === 'prep') {
      if (payload.done) {
        chipYtdlp.classList.remove('active'); chipYtdlp.classList.add('done')
        chipFfmpeg.classList.remove('active'); chipFfmpeg.classList.add('done')
        return
      }
      if (payload.message && payload.message.indexOf('yt-dlp') >= 0) {
        chipYtdlp.classList.add('active')
      } else if (payload.message && payload.message.indexOf('ffmpeg') >= 0) {
        chipYtdlp.classList.remove('active'); chipYtdlp.classList.add('done')
        chipFfmpeg.classList.add('active')
      }
      return
    }
    if (payload.phase === 'item') {
      var grid = payload.kind === 'music' ? musicGrid : imageGrid
      updateCard(grid, payload.index, payload.percent || 0, payload.status)
      return
    }
    if (payload.phase === 'package') {
      pkgSub.textContent = payload.done ? '설치 완료' : (payload.message || '빌드 중…')
      return
    }
  })

  cancelBtn.addEventListener('click', function () {
    if (!state.installing) return
    cancelBtn.disabled = true
    api.cancelInstall()
  })

  // 페이지 진입 즉시 설치 시작
  state.installing = true
  logViewer.hidden = false
  api.startInstall().then(function (result) {
    state.installing = false
    state.installed = true
    state.resourcepackPath = (result && result.resourcepackPath) || ''
    if (stopProgress) stopProgress()
    renderStep3()
  }).catch(function (err) {
    state.installing = false
    if (stopProgress) stopProgress()
    alert('설치 실패: ' + ((err && err.message) || err))
    renderStep1()
  })
}

// ── 3단계: 완료 ────────────────────────────────────
function renderStep3() {
  setActiveStep(3)
  clearPage()
  var section = document.createElement('section')
  section.className = 'page'
  section.innerHTML =
    '<h2>3단계. 완료</h2>' +
    '<p class="formMessage">리소스팩 설치를 완료했습니다.</p>' +
    (state.resourcepackPath
      ? '<p class="formMessage"><code>' + escapeHtml(state.resourcepackPath) + '</code></p>'
      : '') +
    '<div class="actionRow">' +
    '  <button class="secondaryBtn" id="openFolder">리소스팩 폴더 열기</button>' +
    '  <button class="primaryBtn" id="finish">확인</button>' +
    '</div>'
  pageHost.appendChild(section)
  section.querySelector('#openFolder').addEventListener('click', function () {
    api.openResourcepackFolder()
  })
  section.querySelector('#finish').addEventListener('click', function () {
    api.quit()
  })
}

function escapeHtml(s) {
  return String(s).replace(/[&<>"']/g, function (c) {
    return c === '&' ? '&amp;' : c === '<' ? '&lt;' : c === '>' ? '&gt;' : c === '"' ? '&quot;' : '&#39;'
  })
}

renderStep1()