// @ts-nocheck
import type { FastifyInstance } from 'fastify';
import { channelRepository } from '@core/storage/repositories/channels.js';
import { scrapeQueueRepository } from '@core/storage/repositories/scrapeQueue.js';
import { userRepository } from '@core/storage/repositories/users.js';
import { logRepository } from '@core/storage/repositories/logs.js';
import { validateInput, channelAddSchema, channelTagsSchema, searchSchema } from '@core/security/validation.js';
import { requireAuth, checkBanned } from '@core/auth/middleware.js';
import { config } from '@config/index.js';
import { getClientIP, hashIP } from '@core/security/vpnDetect.js';
import { generateVerificationCode } from '@core/utils/id.js';
import { formatNumber, formatRelativeTime, isValidWhatsAppChannelUrl } from '@core/utils/helpers.js';

export async function channelRoutes(app: FastifyInstance) {
  // Add channel page
  app.get('/channels/add', { preHandler: [requireAuth, checkBanned] }, async (request, reply) => {
    return reply.view('pages/channels/add.njk', {
      csrfToken: request.csrfToken(),
      user: request.user,
      maxChannels: config.maxChannelsPerUser || 10,
    });
  });

  // Add channel handler
  app.post('/channels/add', { preHandler: [requireAuth, checkBanned] }, async (request, reply) => {
    const ip = getClientIP(request);
    const validation = validateInput(channelAddSchema, request.body);

    if (!validation.success) {
      return reply.status(400).view('pages/channels/add.njk', {
        csrfToken: request.csrfToken(),
        user: request.user,
        errors: validation.errors.map(e => e.message),
        formData: request.body,
      });
    }

    const { inviteLink } = validation.data;

    // Check user's channel count
    const user = await userRepository.findById(request.user!.id);
    if (!user) {
      return reply.status(404).send({ error: 'User not found' });
    }

    const maxChannels = config.maxChannelsPerUser || 10;
    if (user.channelCount >= maxChannels) {
      return reply.status(400).view('pages/channels/add.njk', {
        csrfToken: request.csrfToken(),
        user: request.user,
        errors: [`Maximum ${maxChannels} channels allowed per user`],
        formData: request.body,
      });
    }

    // Check if already in queue or published
    const existing = await channelRepository.findOne({ inviteLink, ownerId: request.user!.id });
    if (existing) {
      return reply.status(400).view('pages/channels/add.njk', {
        csrfToken: request.csrfToken(),
        user: request.user,
        errors: ['This channel is already in your list'],
        formData: request.body,
      });
    }

    // Generate verification code
    const verificationCode = generateVerificationCode();

    // Create pending channel in scrape queue
    const queueItem = await scrapeQueueRepository.addToQueue({
      type: 'new',
      channelUrl: inviteLink,
      userId: request.user!.id,
    });

    // Update queue item with verification code
    await scrapeQueueRepository.setValidationCode(queueItem.id, verificationCode);

    // Increment user's channel count
    await userRepository.incrementChannelCount(request.user!.id);

    // Log
    await logRepository.log({
      level: 'info',
      message: 'Channel submitted for scraping',
      context: { inviteLink, queueId: queueItem.id, verificationCode },
      userId: request.user!.id,
      ip,
      userAgent: request.headers['user-agent'],
      url: request.url,
      method: request.method,
    });

    return reply.view('pages/channels/verify.njk', {
      csrfToken: request.csrfToken(),
      user: request.user,
      verificationCode,
      inviteLink,
      queueId: queueItem.id,
    });
  });

  // My channels dashboard
  app.get('/channels/my', { preHandler: [requireAuth, checkBanned] }, async (request, reply) => {
    const page = parseInt(request.query.page as string) || 1;
    const limit = 10;
    const offset = (page - 1) * limit;

    const [channels, total] = await Promise.all([
      channelRepository.findByOwner(request.user!.id, { limit, offset }),
      channelRepository.count({ ownerId: request.user!.id }),
    ]);

    return reply.view('pages/channels/my.njk', {
      csrfToken: request.csrfToken(),
      user: request.user,
      channels: channels.map(c => ({
        ...c,
        formattedFollowers: formatNumber(c.followerCount),
        formattedVotes: formatNumber(c.voteCount),
        relativeTime: formatRelativeTime(c.createdAt),
        statusLabel: getStatusLabel(c.status),
      })),
      pagination: {
        page,
        totalPages: Math.ceil(total / limit),
        total,
        hasNext: page * limit < total,
        hasPrev: page > 1,
      },
    });
  });

  // Channel details (owner view)
  app.get('/channels/my/:id', { preHandler: [requireAuth, checkBanned] }, async (request, reply) => {
    const channel = await channelRepository.findById(request.params.id);
    if (!channel || channel.ownerId !== request.user!.id) {
      return reply.status(404).view('pages/404.njk', { user: request.user });
    }

    return reply.view('pages/channels/detail-owner.njk', {
      csrfToken: request.csrfToken(),
      user: request.user,
      channel: {
        ...channel,
        formattedFollowers: formatNumber(channel.followerCount),
        formattedVotes: formatNumber(channel.voteCount),
        relativeTime: formatRelativeTime(channel.createdAt),
        statusLabel: getStatusLabel(channel.status),
      },
    });
  });

  // Update channel tags
  app.post('/channels/my/:id/tags', { preHandler: [requireAuth, checkBanned] }, async (request, reply) => {
    const channel = await channelRepository.findById(request.params.id);
    if (!channel || channel.ownerId !== request.user!.id) {
      return reply.status(404).send({ error: 'Channel not found' });
    }

    const validation = validateInput(channelTagsSchema, request.body);
    if (!validation.success) {
      return reply.status(400).send({ errors: validation.errors.map(e => e.message) });
    }

    const updated = await channelRepository.addTags(channel.id, validation.data.tags);
    return reply.send({ success: true, tags: updated?.tags });
  });

  // Remove channel tag
  app.delete('/channels/my/:id/tags/:tag', { preHandler: [requireAuth, checkBanned] }, async (request, reply) => {
    const channel = await channelRepository.findById(request.params.id);
    if (!channel || channel.ownerId !== request.user!.id) {
      return reply.status(404).send({ error: 'Channel not found' });
    }

    await channelRepository.removeTag(channel.id, request.params.tag);
    return reply.send({ success: true });
  });

  // Delete channel
  app.delete('/channels/my/:id', { preHandler: [requireAuth, checkBanned] }, async (request, reply) => {
    const channel = await channelRepository.findById(request.params.id);
    if (!channel || channel.ownerId !== request.user!.id) {
      return reply.status(404).send({ error: 'Channel not found' });
    }

    await channelRepository.delete(channel.id);
    await userRepository.decrementChannelCount(request.user!.id);

    await logRepository.log({
      level: 'info',
      message: 'Channel deleted by owner',
      context: { channelId: channel.id, channelName: channel.name },
      userId: request.user!.id,
      ip: getClientIP(request),
      userAgent: request.headers['user-agent'],
      url: request.url,
      method: request.method,
    });

    return reply.send({ success: true });
  });

  // Public channel listing
  app.get('/channels', async (request, reply) => {
    const validation = validateInput(searchSchema, request.query);
    const params = validation.success ? validation.data : { q: '', sort: 'newest', page: 1, limit: 20 };

    const tag = request.query.tag as string | undefined;
    const search = params.q;
    const sort = params.sort;
    const page = params.page;
    const limit = params.limit;
    const offset = (page - 1) * limit;

    // Get sort field and order
    const { field, order } = getSortField(sort);

    const [channels, total, allTags] = await Promise.all([
      channelRepository.findPublished({
        tag,
        search,
        sortBy: field,
        sortOrder: order,
        limit,
        offset,
      }),
      channelRepository.countPublished({ ...(tag && { tags: tag }), ...(search && { $or: [] }) }),
      getAllTags(),
    ]);

    return reply.view('pages/channels/list.njk', {
      csrfToken: request.csrfToken(),
      user: request.user,
      channels: channels.map(c => ({
        ...c,
        formattedFollowers: formatNumber(c.followerCount),
        formattedVotes: formatNumber(c.voteCount),
        relativeTime: formatRelativeTime(c.createdAt),
      })),
      tags: allTags,
      currentTag: tag,
      search: search,
      sort: sort,
      pagination: {
        page,
        totalPages: Math.ceil(total / limit),
        total,
        hasNext: page * limit < total,
        hasPrev: page > 1,
      },
      sortOptions: [
        { value: 'trending', label: 'Trending' },
        { value: 'followers', label: 'Most Followers' },
        { value: 'votes', label: 'Most Votes' },
        { value: 'newest', label: 'Newest' },
        { value: 'oldest', label: 'Oldest' },
        { value: 'alphabetical', label: 'Alphabetical' },
        { value: 'updated', label: 'Recently Updated' },
      ],
    });
  });

  // Public channel detail
  app.get('/channels/:id', async (request, reply) => {
    const channel = await channelRepository.findById(request.params.id);
    if (!channel || channel.status !== 'published' || channel.isBanned) {
      return reply.status(404).view('pages/404.njk', { user: request.user });
    }

    // Increment view count
    await channelRepository.incrementViewCount(channel.id);

    return reply.view('pages/channels/detail.njk', {
      csrfToken: request.csrfToken(),
      user: request.user,
      channel: {
        ...channel,
        formattedFollowers: formatNumber(channel.followerCount),
        formattedVotes: formatNumber(channel.voteCount),
        relativeTime: formatRelativeTime(channel.createdAt),
      },
      ipHash: hashIP(getClientIP(request)),
    });
  });

  // Vote on channel
  app.post('/channels/:id/vote', async (request, reply) => {
    const ip = getClientIP(request);
    const ipHash = hashIP(ip);
    const channelId = request.params.id;

    const channel = await channelRepository.findById(channelId);
    if (!channel || channel.status !== 'published' || channel.isBanned) {
      return reply.status(404).send({ error: 'Channel not found' });
    }

    // Check VPN/Proxy
    const vpnCheck = await checkVPN(ip);
    if (vpnCheck.isVPN || vpnCheck.isProxy || vpnCheck.isDatacenter) {
      await logRepository.log({
        level: 'warn',
        message: 'Vote blocked - VPN/Proxy detected',
        context: { channelId, ip, ...vpnCheck },
        ip,
        userAgent: request.headers['user-agent'],
        url: request.url,
        method: request.method,
      });
      return reply.status(403).send({
        error: 'Votes from VPN, Proxy, or Datacenter IPs are not allowed',
        details: vpnCheck.details,
      });
    }

    // Check vote cooldown (6 hours)
    const { voteRepository } = await import('@core/storage/repositories/votes.js');
    const recentVotes = await voteRepository.getRecentVotesByIp(ipHash, 6);
    if (recentVotes.length > 0) {
      return reply.status(429).send({
        error: 'You can only vote once every 6 hours',
        retryAfter: '6 hours',
      });
    }

    // Check if already voted
    const hasVoted = await voteRepository.hasVoted(channelId, ipHash);
    if (hasVoted) {
      return reply.status(400).send({ error: 'Already voted' });
    }

    // Record vote
    await voteRepository.recordVote({ channelId, ipHash, userId: request.user?.id });
    await channelRepository.incrementVoteCount(channelId);

    await logRepository.log({
      level: 'info',
      message: 'Vote recorded',
      context: { channelId },
      userId: request.user?.id,
      ip,
      userAgent: request.headers['user-agent'],
      url: request.url,
      method: request.method,
    });

    return reply.send({ success: true, voteCount: channel.voteCount + 1 });
  });
}

function getStatusLabel(status: string): { label: string; class: string } {
  const labels: Record<string, { label: string; class: string }> = {
    pending: { label: 'Pending', class: 'badge-warning' },
    scraping: { label: 'Scraping', class: 'badge-info' },
    validating: { label: 'Verifying', class: 'badge-info' },
    published: { label: 'Published', class: 'badge-success' },
    rejected: { label: 'Rejected', class: 'badge-danger' },
    banned: { label: 'Banned', class: 'badge-dark' },
  };
  return labels[status] || { label: status, class: 'badge-secondary' };
}

function getSortField(sort: string): { field: string; order: 'asc' | 'desc' } {
  switch (sort) {
    case 'trending': return { field: 'voteCount', order: 'desc' };
    case 'followers': return { field: 'followerCount', order: 'desc' };
    case 'votes': return { field: 'voteCount', order: 'desc' };
    case 'newest': return { field: 'createdAt', order: 'desc' };
    case 'oldest': return { field: 'createdAt', order: 'asc' };
    case 'alphabetical': return { field: 'name', order: 'asc' };
    case 'updated': return { field: 'lastScrapedAt', order: 'desc' };
    default: return { field: 'createdAt', order: 'desc' };
  }
}

async function getAllTags(): Promise<string[]> {
  const channels = await channelRepository.findPublished({ limit: 10000 });
  const tags = new Set<string>();
  channels.forEach(c => c.tags.forEach(t => tags.add(t)));
  return Array.from(tags).sort();
}

async function checkVPN(ip: string) {
  const { checkVPN } = await import('@core/security/vpnDetect.js');
  return checkVPN(ip);
}