const { contextBridge, ipcRenderer } = require('electron');

let downloadSeq = 0;
function downloadFile(url, suggestName, entryId, extraHeaders, meta, onProgress) {
  const requestId = `dl_${Date.now().toString(36)}_${(++downloadSeq).toString(36)}`;
  const listener = (_event, data) => {
    if (!data || data.requestId !== requestId || typeof onProgress !== 'function') return;
    try { onProgress(data); } catch (e) { /* 渲染层进度回调异常不影响下载 */ }
  };
  if (typeof onProgress === 'function') ipcRenderer.on('download:progress', listener);
  return ipcRenderer
    .invoke('download:file', url, suggestName, entryId, extraHeaders, meta, requestId)
    .finally(() => ipcRenderer.removeListener('download:progress', listener));
}

function captureReaderRect(rect) {
  const value = rect && typeof rect === 'object' ? rect : {};
  const area = {
    x: Number(value.x),
    y: Number(value.y),
    width: Number(value.width),
    height: Number(value.height)
  };
  const documentArea = document.getElementById('docArea');
  const bounds = documentArea && documentArea.getBoundingClientRect();
  if (
    !bounds
    || !Object.values(area).every(Number.isFinite)
    || area.x < bounds.left - 1
    || area.y < bounds.top - 1
    || area.x + area.width > bounds.right + 1
    || area.y + area.height > bounds.bottom + 1
  ) {
    return Promise.resolve({ ok: false, error: '只能截取阅读正文区域' });
  }
  return ipcRenderer.invoke('reader:captureRect', area);
}

contextBridge.exposeInMainWorld('api', {
  sources: {
    list: () => ipcRenderer.invoke('sources:list'),
    browse: (sourceId, page) => ipcRenderer.invoke('source:list', sourceId, page),
    search: (sourceId, keyword, page) => ipcRenderer.invoke('source:search', sourceId, keyword, page),
    detail: (sourceId, postId) => ipcRenderer.invoke('source:detail', sourceId, postId),
    download: (sourceId, postId) => ipcRenderer.invoke('source:download', sourceId, postId)
  },
  library: {
    list: () => ipcRenderer.invoke('library:list'),
    get: (id) => ipcRenderer.invoke('library:get', id),
    listShelves: () => ipcRenderer.invoke('library:listShelves'),
    listTags: () => ipcRenderer.invoke('library:listTags'),
    addShelf: (input) => ipcRenderer.invoke('library:addShelf', input),
    updateShelf: (id, patch) => ipcRenderer.invoke('library:updateShelf', id, patch),
    removeShelf: (id) => ipcRenderer.invoke('library:removeShelf', id),
    addTag: (input) => ipcRenderer.invoke('library:addTag', input),
    updateTag: (id, patch) => ipcRenderer.invoke('library:updateTag', id, patch),
    removeTag: (id) => ipcRenderer.invoke('library:removeTag', id),
    findBySource: (sourceId, postId) => ipcRenderer.invoke('library:findBySource', sourceId, postId),
    add: (item) => ipcRenderer.invoke('library:add', item),
    update: (id, patch) => ipcRenderer.invoke('library:update', id, patch),
    updateMany: (patches) => ipcRenderer.invoke('library:updateMany', patches),
    remove: (id, options) => ipcRenderer.invoke('library:remove', id, options),
    removeMany: (ids, options) => ipcRenderer.invoke('library:removeMany', ids, options),
    getDir: () => ipcRenderer.invoke('library:getDir'),
    pickDir: () => ipcRenderer.invoke('library:pickDir'),
    setDir: (dir, migrate) => ipcRenderer.invoke('library:setDir', dir, migrate),
    pickLocal: (kind) => ipcRenderer.invoke('dialog:pickLocal', kind),
    importLocal: (selectionId, options) => (
      ipcRenderer.invoke('library:importLocal', selectionId, options)
    ),
    scan: () => ipcRenderer.invoke('library:scan'),
    onChanged: (cb) => {
      const h = () => cb();
      ipcRenderer.on('library:changed', h);
      return () => ipcRenderer.removeListener('library:changed', h);
    }
  },
  settings: {
    get: (key, def) => ipcRenderer.invoke('settings:get', key, def),
    set: (key, value) => ipcRenderer.invoke('settings:set', key, value)
  },
  ui: {
    getTheme: () => ipcRenderer.invoke('ui:getTheme'),
    setTheme: (theme) => ipcRenderer.invoke('ui:setTheme', theme),
    onThemeChanged: (cb) => {
      const h = (_event, theme) => cb(theme);
      ipcRenderer.on('ui:themeChanged', h);
      return () => ipcRenderer.removeListener('ui:themeChanged', h);
    }
  },
  downloadFile,
  zlib: {
    hasCreds: () => ipcRenderer.invoke('zlib:hasCreds'),
    login: (email, password) => ipcRenderer.invoke('zlib:login', email, password),
    logout: () => ipcRenderer.invoke('zlib:logout')
  },
  semanticScholar: {
    keyStatus: () => ipcRenderer.invoke('semanticScholar:keyStatus'),
    setKey: (key) => ipcRenderer.invoke('semanticScholar:setKey', key),
    clearKey: () => ipcRenderer.invoke('semanticScholar:clearKey')
  },
  proxy: {
    get: () => ipcRenderer.invoke('proxy:get'),
    set: (url) => ipcRenderer.invoke('proxy:set', url)
  },
  reader: {
    ready: () => ipcRenderer.invoke('reader:ready'),
    entryClosed: () => ipcRenderer.invoke('reader:entryClosed'),
    open: (entryId, fileIndex) => ipcRenderer.invoke('reader:open', entryId, fileIndex),
    openAt: (entryId, fileIndex, documentKey, locator) => (
      ipcRenderer.invoke('reader:openAt', entryId, fileIndex, documentKey, locator)
    ),
    meta: (entryId, fileIndex) => ipcRenderer.invoke('reader:meta', entryId, fileIndex),
    bytes: (entryId, fileIndex) => ipcRenderer.invoke('reader:bytes', entryId, fileIndex),
    rangeOpen: (entryId, fileIndex) => ipcRenderer.invoke('reader:rangeOpen', entryId, fileIndex),
    rangeRead: (sessionId, begin, end) => (
      ipcRenderer.invoke('reader:rangeRead', sessionId, begin, end)
    ),
    rangeClose: (sessionId) => ipcRenderer.invoke('reader:rangeClose', sessionId),
    captureRect: (rect) => captureReaderRect(rect),
    openExternal: (entryId, fileIndex) => (
      ipcRenderer.invoke('reader:openExternal', entryId, fileIndex)
    ),
    getState: (entryId, documentKey) => ipcRenderer.invoke('reader:getState', entryId, documentKey),
    setProgress: (entryId, documentKey, locator, percent) => (
      ipcRenderer.invoke('reader:setProgress', entryId, documentKey, locator, percent)
    ),
    addBookmark: (entryId, mark) => ipcRenderer.invoke('reader:addBookmark', entryId, mark),
    removeBookmark: (entryId, markId) => ipcRenderer.invoke('reader:removeBookmark', entryId, markId),
    addNote: (entryId, note) => ipcRenderer.invoke('reader:addNote', entryId, note),
    addStandaloneNote: (note) => ipcRenderer.invoke('reader:addStandaloneNote', note),
    updateNote: (entryId, noteId, patch) => ipcRenderer.invoke('reader:updateNote', entryId, noteId, patch),
    removeNote: (entryId, noteId) => ipcRenderer.invoke('reader:removeNote', entryId, noteId),
    listNotes: (filters) => ipcRenderer.invoke('reader:listNotes', filters),
    getNoteCounts: () => ipcRenderer.invoke('reader:getNoteCounts'),
    getAnnotationCounts: () => ipcRenderer.invoke('reader:getAnnotationCounts'),
    orphanReport: () => ipcRenderer.invoke('reader:orphanReport'),
    purgeOrphans: (scope) => ipcRenderer.invoke('reader:purgeOrphans', scope),
    listCollections: () => ipcRenderer.invoke('reader:listCollections'),
    addCollection: (input) => ipcRenderer.invoke('reader:addCollection', input),
    updateCollection: (id, patch) => ipcRenderer.invoke('reader:updateCollection', id, patch),
    removeCollection: (id) => ipcRenderer.invoke('reader:removeCollection', id),
    pickNotePdf: () => ipcRenderer.invoke('reader:pickNotePdf'),
    notePdfBytes: (ref) => ipcRenderer.invoke('reader:notePdfBytes', ref),
    saveNotePdf: (bytes, suggestedName) => (
      ipcRenderer.invoke('reader:saveNotePdf', bytes, suggestedName)
    ),
    getAnnotations: (entryId, fileIndex) => ipcRenderer.invoke('reader:getAnnotations', entryId, fileIndex),
    setAnnotationPage: (entryId, fileIndex, page, data) => ipcRenderer.invoke('reader:setAnnotationPage', entryId, fileIndex, page, data),
    onOpenEntry: (cb) => {
      const h = (_e, data) => cb(data);
      ipcRenderer.on('reader:openEntry', h);
      return () => ipcRenderer.removeListener('reader:openEntry', h);
    },
    onCloseEntry: (cb) => {
      const h = (_e, entryId) => cb(entryId);
      ipcRenderer.on('reader:closeEntry', h);
      return () => ipcRenderer.removeListener('reader:closeEntry', h);
    },
    onPurgeEntry: (cb) => {
      const h = async (_e, data) => {
        try { await cb(data); } finally {
          if (data && data.requestId) ipcRenderer.send('reader:purgeReady', data.requestId);
        }
      };
      ipcRenderer.on('reader:purgeEntry', h);
      return () => ipcRenderer.removeListener('reader:purgeEntry', h);
    },
    onPrepareClose: (cb) => {
      const h = async () => {
        try { await cb(); } finally { ipcRenderer.send('reader:shutdownReady'); }
      };
      ipcRenderer.on('reader:prepareClose', h);
      return () => ipcRenderer.removeListener('reader:prepareClose', h);
    },
    onNotesChanged: (cb) => {
      const h = (_e, data) => cb(data);
      ipcRenderer.on('reader:notesChanged', h);
      return () => ipcRenderer.removeListener('reader:notesChanged', h);
    }
  },
  notes: {
    openWindow: (entryId, noteId) => ipcRenderer.invoke('notes:openWindow', entryId, noteId),
    getOne: (entryId, noteId) => ipcRenderer.invoke('notes:getOne', entryId, noteId),
    openWindows: () => ipcRenderer.invoke('notes:openWindows'),
    tabsChanged: (tabs) => ipcRenderer.invoke('notes:tabsChanged', tabs),
    shutdownReady: () => ipcRenderer.invoke('notes:shutdownReady'),
    cancelClose: () => ipcRenderer.invoke('notes:cancelClose'),
    onWindowsChanged: (cb) => {
      const h = (_e, data) => cb(data);
      ipcRenderer.on('notes:windowsChanged', h);
      return () => ipcRenderer.removeListener('notes:windowsChanged', h);
    },
    onOpenTab: (cb) => {
      const h = (_e, data) => cb(data);
      ipcRenderer.on('notes:openTab', h);
      return () => ipcRenderer.removeListener('notes:openTab', h);
    },
    onCloseTab: (cb) => {
      const h = (_e, data) => cb(data);
      ipcRenderer.on('notes:closeTab', h);
      return () => ipcRenderer.removeListener('notes:closeTab', h);
    },
    onPrepareClose: (cb) => {
      const h = () => cb();
      ipcRenderer.on('notes:prepareClose', h);
      return () => ipcRenderer.removeListener('notes:prepareClose', h);
    }
  },
  ai: {
    status: () => ipcRenderer.invoke('ai:status'),
    save: (cfg) => ipcRenderer.invoke('ai:save', cfg),
    clear: () => ipcRenderer.invoke('ai:clear'),
    run: (payload) => ipcRenderer.invoke('ai:run', payload),
    cancel: (runId) => ipcRenderer.invoke('ai:cancel', runId),
    sessions: {
      list: (filters) => ipcRenderer.invoke('ai:sessionList', filters),
      create: (input) => ipcRenderer.invoke('ai:sessionCreate', input),
      rename: (sessionId, title) => ipcRenderer.invoke('ai:sessionRename', sessionId, title),
      setPinned: (sessionId, pinned) => ipcRenderer.invoke('ai:sessionPin', sessionId, pinned),
      remove: (sessionId) => ipcRenderer.invoke('ai:sessionRemove', sessionId),
      clear: (sessionId) => ipcRenderer.invoke('ai:sessionClear', sessionId),
      messages: (sessionId, options) => ipcRenderer.invoke('ai:sessionMessages', sessionId, options)
    },
    onChanged: (cb) => {
      const h = (_e, data) => cb(data);
      ipcRenderer.on('ai:changed', h);
      return () => ipcRenderer.removeListener('ai:changed', h);
    },
    // 返回取消订阅函数：阅读器窗口关闭时要能解绑，否则监听器会越积越多
    onDelta: (cb) => {
      const h = (_e, data) => cb(data);
      ipcRenderer.on('ai:delta', h);
      return () => ipcRenderer.removeListener('ai:delta', h);
    }
  },
  openPath: (p) => ipcRenderer.invoke('shell:openPath', p),
  showItem: (p) => ipcRenderer.invoke('shell:showItem', p),
  openExternal: (url) => ipcRenderer.invoke('shell:openExternal', url),
  copy: (text) => ipcRenderer.invoke('copy', text),
  getVersion: () => ipcRenderer.invoke('app:version'),
  checkUpdate: () => ipcRenderer.invoke('app:checkUpdate'),
  minimize: () => ipcRenderer.send('win:minimize'),
  maximize: () => ipcRenderer.send('win:maximize'),
  close: () => ipcRenderer.send('win:close')
});