#!/usr/bin/env node

/**
 * Telegram Reader Client — удобный JS интерфейс к tg-proxy.wzray.com
 *
 * Usage:
 *   node tg-client.js get-folders
 *   node tg-client.js get-chats [--limit 50] [--offset 0] [--archived true|false] [--chat-type direct|bot|group|channel] [--folder-id N]
 *   node tg-client.js get-messages <chat_id> [--limit 50] [--offset 0]
 *   node tg-client.js delta <chat_id> <since> [--limit 50] [--offset 0]
 *
 * Examples:
 *   node tg-client.js get-folders
 *   node tg-client.js get-chats --limit 100 --chat-type group --folder-id 2
 *   node tg-client.js get-messages 5880803391 --limit 10
 *   node tg-client.js delta 5880803391 "2026-02-16T09:00:00Z"
 */

const https = require('https');

const BASE_URL = 'tg-proxy.wzray.com';

function request(path, query = {}) {
  const queryString = new URLSearchParams(query).toString();
  const url = `${path}${queryString ? '?' + queryString : ''}`;

  return new Promise((resolve, reject) => {
    const req = https.request(
      {
        hostname: BASE_URL,
        path: url,
        method: 'GET',
        headers: { 'User-Agent': 'openclaw-telegram-reader/1.0' }
      },
      (res) => {
        let data = '';
        res.on('data', (chunk) => data += chunk);
        res.on('end', () => {
          try {
            resolve(JSON.parse(data));
          } catch (e) {
            reject(new Error(`JSON parse error: ${e.message}`));
          }
        });
      }
    );

    req.on('error', reject);
    req.end();
  });
}

function getFlagValue(args, flag, fallback) {
  const idx = args.indexOf(flag);
  if (idx === -1 || idx + 1 >= args.length) return fallback;
  const parsed = parseInt(args[idx + 1], 10);
  return Number.isNaN(parsed) ? fallback : parsed;
}

function getStringFlagValue(args, flag, fallback = undefined) {
  const idx = args.indexOf(flag);
  if (idx === -1 || idx + 1 >= args.length) return fallback;
  return args[idx + 1];
}

function getBooleanFlagValue(args, flag, fallback = undefined) {
  const value = getStringFlagValue(args, flag, undefined);
  if (value === undefined) return fallback;
  if (value === 'true') return true;
  if (value === 'false') return false;
  return fallback;
}

/**
 * Get list of chats
 */
async function getChats(limit = 50, offset = 0, options = {}) {
  const query = { limit, offset };
  if (options.archived !== undefined) query.archived = String(options.archived);
  if (options.chatType) query.chat_type = options.chatType;
  if (options.folderId !== undefined) query.folder_id = String(options.folderId);
  const result = await request('/chats', query);
  return result;
}

/**
 * Get list of folders
 */
async function getFolders() {
  const result = await request('/folders');
  return result;
}

/**
 * Get messages in a specific chat
 */
async function getChatMessages(chatId, limit = 50, offset = 0) {
  const result = await request(`/chats/${chatId}/messages`, { limit, offset });
  return result;
}

/**
 * Get messages delta since timestamp for one chat
 */
async function getChatDelta(chatId, since, limit = 50, offset = 0) {
  const result = await request(`/chats/${chatId}/delta`, {
    since,
    limit,
    offset
  });
  return result;
}

/**
 * Filter chats by criteria
 */
function filterChats(chats, criteria) {
  const now = new Date();
  const weekAgo = new Date(now.getTime() - 7 * 24 * 60 * 60 * 1000);

  return chats.filter(chat => {
    // Not muted
    if (criteria.notMuted && chat.is_muted) return false;

    // Pinned
    if (criteria.pinned && !chat.is_pinned) return false;

    // Active last week
    if (criteria.activeLastWeek) {
      if (!chat.last_message_date) return false;
      const lastMsg = new Date(chat.last_message_date);
      if (lastMsg < weekAgo) return false;
    }

    // Inactive (no messages in last week)
    if (criteria.inactiveLastWeek) {
      if (!chat.last_message_date) return true; // no messages = inactive
      const lastMsg = new Date(chat.last_message_date);
      if (lastMsg >= weekAgo) return false; // has recent messages, skip
    }

    // Type filter
    if (criteria.type) {
      if (criteria.type === 'direct' && chat.type !== 'private') return false;
      else if (criteria.type === 'bot' && chat.type !== 'bot') return false;
      else if (criteria.type === 'group' && !['group', 'supergroup', 'forum'].includes(chat.type)) return false;
      else if (criteria.type === 'channel' && chat.type !== 'channel') return false;
    }

    // Archived filter
    if (criteria.archived !== undefined && chat.archived !== criteria.archived) return false;

    // Folder filter
    if (criteria.folderId !== undefined && !(chat.folder_ids || []).includes(criteria.folderId)) return false;

    // Has unread
    if (criteria.hasUnread && chat.unread_count === 0) return false;

    return true;
  });
}

/**
 * Filter messages by importance
 */
function filterImportantMessages(messages) {
  const keywords = ['важно', 'срочно', 'deadline', 'сегодня', '@wzray', 'визирей'];
  const lowerKeywords = keywords.map(k => k.toLowerCase());

  return messages.filter(msg => {
    if (!msg.text) return false;

    const text = msg.text.toLowerCase();

    // Check for keywords
    if (lowerKeywords.some(kw => text.includes(kw))) return true;

    // Mentions (basic check)
    if (text.includes('@')) return true;

    return false;
  });
}

/**
 * CLI
 */
async function main() {
  const args = process.argv.slice(2);

  if (args.length === 0) {
    console.log('Usage:');
      console.log('  node tg-client.js get-folders');
      console.log('  node tg-client.js get-chats [--limit N] [--offset N] [--archived true|false] [--chat-type direct|bot|group|channel] [--folder-id N]');
    console.log('  node tg-client.js get-messages <chat_id> [--limit N] [--offset N]');
    console.log('  node tg-client.js delta <chat_id> <since> [--limit N] [--offset N]');
    console.log('  node tg-client.js filter-chats [--pinned] [--not-muted] [--active-last-week]');
    console.log('');
    console.log('Examples:');
      console.log('  node tg-client.js get-folders');
      console.log('  node tg-client.js get-chats --limit 100 --chat-type group --folder-id 2');
    console.log('  node tg-client.js get-messages 5880803391 --limit 10');
    console.log('  node tg-client.js delta 5880803391 "2026-02-16T09:00:00Z"');
    console.log('  node tg-client.js filter-chats --pinned --not-muted --type=direct');
    process.exit(0);
  }

  try {
      const [command] = args;

      switch (command) {
      case 'get-folders': {
        const result = await getFolders();
        console.log(JSON.stringify(result, null, 2));
        break;
      }

      case 'get-chats': {
        const limit = getFlagValue(args, '--limit', 50);
        const offset = getFlagValue(args, '--offset', 0);
        const archived = getBooleanFlagValue(args, '--archived', undefined);
        const chatType = getStringFlagValue(args, '--chat-type', undefined);
        const folderId = getFlagValue(args, '--folder-id', undefined);
        const result = await getChats(limit, offset, { archived, chatType, folderId });
        console.log(JSON.stringify(result, null, 2));
        break;
      }

      case 'get-messages': {
        const chatId = args[1];
        if (!chatId) throw new Error('chat_id is required');
        const limit = getFlagValue(args, '--limit', 50);
        const offset = getFlagValue(args, '--offset', 0);
        const result = await getChatMessages(chatId, limit, offset);
        console.log(JSON.stringify(result, null, 2));
        break;
      }

      case 'delta': {
        const chatId = args[1];
        const since = args[2];
        if (!chatId || !since) throw new Error('chat_id and since are required');
        const limit = getFlagValue(args, '--limit', 50);
        const offset = getFlagValue(args, '--offset', 0);
        const result = await getChatDelta(chatId, since, limit, offset);
        console.log(JSON.stringify(result, null, 2));
        break;
      }

      case 'filter-chats': {
        const limit = getFlagValue(args, '--limit', 100);
        const result = await getChats(limit);

        if (!result || !result.items) {
          throw new Error('Invalid response from API');
        }

        const criteria = {
          pinned: args.includes('--pinned'),
          notMuted: args.includes('--not-muted'),
          activeLastWeek: args.includes('--active-last-week'),
          inactiveLastWeek: args.includes('--inactive-last-week'),
          hasUnread: args.includes('--has-unread'),
          type: args.find(a => a.startsWith('--type='))?.split('=')[1],
          folderId: args.find(a => a.startsWith('--folder-id='))
            ? parseInt(args.find(a => a.startsWith('--folder-id='))?.split('=')[1], 10)
            : undefined,
          archived: args.find(a => a.startsWith('--archived='))?.split('=')[1] === 'true'
            ? true
            : args.find(a => a.startsWith('--archived='))?.split('=')[1] === 'false'
              ? false
              : undefined
        };

        const filtered = filterChats(result.items, criteria);
        console.log(JSON.stringify(filtered, null, 2));
        break;
      }

      default:
        throw new Error(`Unknown command: ${command}`);
    }
  } catch (error) {
    console.error(`Error: ${error.message}`);
    process.exit(1);
  }
}

// Run CLI if called directly
if (require.main === module) {
  main();
}

// Export for use as a module
module.exports = {
  getFolders,
  getChats,
  getChatMessages,
  getChatDelta,
  filterChats,
  filterImportantMessages
};