/**
 * Dashboard Routes
 * Aggregated data for user dashboard
 */

const express = require('express');
const router = express.Router();
const { authenticate } = require('../middleware/auth');
const { PrismaClient } = require('@prisma/client');

const prisma = new PrismaClient();

/**
 * GET /api/dashboard
 * Get dashboard data for authenticated user
 *
 * Returns:
 * - activeEvents: Events user is checked in to
 * - activeMatches: Accepted matches with video/rating status
 * - matchRequests: Pending incoming/outgoing match requests
 */
router.get('/', authenticate, async (req, res, next) => {
  try {
    const userId = req.user.id;

    // 1. Get active events (user is participant)
    const eventParticipants = await prisma.eventParticipant.findMany({
      where: {
        userId: userId,
      },
      include: {
        event: true,
      },
      orderBy: {
        event: {
          startDate: 'asc', // Upcoming events first
        },
      },
    });

    // Get user's heats for each event
    const activeEvents = await Promise.all(
      eventParticipants.map(async (ep) => {
        const heats = await prisma.eventUserHeat.findMany({
          where: {
            userId: userId,
            eventId: ep.event.id,
          },
          include: {
            division: {
              select: {
                id: true,
                name: true,
                abbreviation: true,
              },
            },
            competitionType: {
              select: {
                id: true,
                name: true,
                abbreviation: true,
              },
            },
          },
        });

        return {
          id: ep.event.id,
          slug: ep.event.slug,
          name: ep.event.name,
          location: ep.event.location,
          startDate: ep.event.startDate,
          endDate: ep.event.endDate,
          participantsCount: ep.event.participantsCount,
          myHeats: heats.map((h) => ({
            id: h.id,
            competitionType: h.competitionType,
            division: h.division,
            heatNumber: h.heatNumber,
            role: h.role,
          })),
        };
      })
    );

    // 2. Get active matches (accepted status)
    const matches = await prisma.match.findMany({
      where: {
        OR: [
          { user1Id: userId },
          { user2Id: userId },
        ],
        status: 'accepted',
      },
      include: {
        user1: {
          select: {
            id: true,
            username: true,
            firstName: true,
            lastName: true,
            avatar: true,
          },
        },
        user2: {
          select: {
            id: true,
            username: true,
            firstName: true,
            lastName: true,
            avatar: true,
          },
        },
        event: {
          select: {
            id: true,
            name: true,
            slug: true,
          },
        },
        room: {
          include: {
            messages: {
              orderBy: {
                createdAt: 'desc',
              },
              take: 50, // Get recent messages to check for videos
            },
          },
        },
        ratings: true,
      },
    });

    const activeMatches = matches.map((match) => {
      // Determine partner (the other user)
      const isUser1 = match.user1Id === userId;
      const partner = isUser1 ? match.user2 : match.user1;
      const partnerId = partner.id;

      // Check video exchange status from messages
      const myVideoMessages = match.room?.messages.filter(
        (m) => m.userId === userId && m.content.includes('📹 Video sent:')
      ) || [];
      const partnerVideoMessages = match.room?.messages.filter(
        (m) => m.userId === partnerId && m.content.includes('📹 Video sent:')
      ) || [];

      const videoExchange = {
        sentByMe: myVideoMessages.length > 0,
        receivedFromPartner: partnerVideoMessages.length > 0,
        lastVideoTimestamp: myVideoMessages.length > 0 || partnerVideoMessages.length > 0
          ? new Date(Math.max(
              ...[...myVideoMessages, ...partnerVideoMessages].map(m => m.createdAt.getTime())
            ))
          : null,
      };

      // Check rating status
      const myRating = match.ratings.find((r) => r.raterId === userId);
      const partnerRating = match.ratings.find((r) => r.raterId === partnerId);

      const ratings = {
        ratedByMe: !!myRating,
        ratedByPartner: !!partnerRating,
      };

      // Get last message timestamp
      const lastMessage = match.room?.messages[0];
      const lastMessageAt = lastMessage ? lastMessage.createdAt : match.createdAt;

      return {
        id: match.id,
        slug: match.slug,
        partner: {
          id: partner.id,
          username: partner.username,
          firstName: partner.firstName,
          lastName: partner.lastName,
          avatar: partner.avatar,
        },
        event: {
          id: match.event.id,
          name: match.event.name,
          slug: match.event.slug,
        },
        videoExchange,
        ratings,
        lastMessageAt,
        status: match.status,
      };
    });

    // Sort by lastMessageAt (most recent first)
    activeMatches.sort((a, b) => new Date(b.lastMessageAt) - new Date(a.lastMessageAt));

    // 3. Get match requests
    // Incoming: user is user2, status is pending
    const incomingRequests = await prisma.match.findMany({
      where: {
        user2Id: userId,
        status: 'pending',
      },
      include: {
        user1: {
          select: {
            id: true,
            username: true,
            firstName: true,
            lastName: true,
            avatar: true,
          },
        },
        event: {
          select: {
            id: true,
            name: true,
            slug: true,
          },
        },
      },
      orderBy: {
        createdAt: 'desc',
      },
    });

    // Get requester heats for incoming requests
    const incoming = await Promise.all(
      incomingRequests.map(async (req) => {
        const requesterHeats = await prisma.eventUserHeat.findMany({
          where: {
            userId: req.user1Id,
            eventId: req.eventId,
          },
          include: {
            division: {
              select: {
                name: true,
                abbreviation: true,
              },
            },
            competitionType: {
              select: {
                name: true,
                abbreviation: true,
              },
            },
          },
        });

        return {
          id: req.id,
          slug: req.slug,
          requester: {
            id: req.user1.id,
            username: req.user1.username,
            firstName: req.user1.firstName,
            lastName: req.user1.lastName,
            avatar: req.user1.avatar,
          },
          event: {
            id: req.event.id,
            name: req.event.name,
            slug: req.event.slug,
          },
          requesterHeats: requesterHeats.map((h) => ({
            competitionType: h.competitionType,
            division: h.division,
            heatNumber: h.heatNumber,
            role: h.role,
          })),
          createdAt: req.createdAt,
        };
      })
    );

    // Outgoing: user is user1, status is pending
    const outgoingRequests = await prisma.match.findMany({
      where: {
        user1Id: userId,
        status: 'pending',
      },
      include: {
        user2: {
          select: {
            id: true,
            username: true,
            firstName: true,
            lastName: true,
            avatar: true,
          },
        },
        event: {
          select: {
            id: true,
            name: true,
            slug: true,
          },
        },
      },
      orderBy: {
        createdAt: 'desc',
      },
    });

    const outgoing = outgoingRequests.map((req) => ({
      id: req.id,
      slug: req.slug,
      recipient: {
        id: req.user2.id,
        username: req.user2.username,
        firstName: req.user2.firstName,
        lastName: req.user2.lastName,
        avatar: req.user2.avatar,
      },
      event: {
        id: req.event.id,
        name: req.event.name,
        slug: req.event.slug,
      },
      createdAt: req.createdAt,
    }));

    res.json({
      success: true,
      data: {
        activeEvents,
        activeMatches,
        matchRequests: {
          incoming,
          outgoing,
        },
      },
    });
  } catch (error) {
    next(error);
  }
});

module.exports = router;