'use strict';

const bookingService = require('../services/booking.service');

const asyncHandler = (fn) => (req, res, next) => {
  Promise.resolve(fn(req, res, next)).catch(next);
};

const create = asyncHandler(async (req, res) => {
  const userId = req.user.sub || req.user.id;
  const booking = await bookingService.createBooking({
    userId,
    serviceId: req.body.serviceId,
    scheduledAt: req.body.scheduledAt,
    endTime: req.body.endTime,
    details: req.body.details
  });

  res.status(201).json({ data: booking });
});

const checkAvailability = asyncHandler(async (req, res) => {
  const { serviceId } = req.params;
  const { startTime, endTime } = req.query;

  if (!startTime || !endTime) {
    return res.status(400).json({ 
      error: { message: 'startTime and endTime query parameters are required' } 
    });
  }

  const availability = await bookingService.checkAvailability(serviceId, startTime, endTime);
  res.json({ data: availability });
});

const list = asyncHandler(async (req, res) => {
  const { status, limit, offset } = req.query;
  const userId = req.user.sub || req.user.id;
  const bookings = await bookingService.listBookings(userId, { 
    status, 
    limit: parseInt(limit) || 50, 
    offset: parseInt(offset) || 0 
  });
  res.json({ data: bookings });
});

const getById = asyncHandler(async (req, res) => {
  const booking = await bookingService.getBookingById(req.params.id);
  if (!booking) {
    return res.status(404).json({ error: { message: 'Booking not found' } });
  }

  const userId = req.user.sub || req.user.id;
  if (booking.user_id !== userId && req.user.role !== 'admin') {
    return res.status(403).json({ error: { message: 'Not authorized' } });
  }

  res.json({ data: booking });
});

const updateStatus = asyncHandler(async (req, res) => {
  const { status } = req.body;
  const booking = await bookingService.updateBookingStatus(req.params.id, status);
  res.json({ data: booking });
});

const cancel = asyncHandler(async (req, res) => {
  const userId = req.user.sub || req.user.id;
  const booking = await bookingService.cancelBooking(req.params.id, userId);
  res.json({ data: booking });
});

const listProviderBookings = asyncHandler(async (req, res) => {
  const userId = req.user.sub || req.user.id;
  const providerProfile = await bookingService.getProviderProfile(userId);
  if (!providerProfile) {
    return res.status(404).json({ error: { message: 'Provider profile not found' } });
  }

  const { status, limit, offset } = req.query;
  const bookings = await bookingService.listProviderBookings(providerProfile.id, { 
    status, 
    limit: parseInt(limit) || 50, 
    offset: parseInt(offset) || 0 
  });
  res.json({ data: bookings });
});

module.exports = {
  create,
  list,
  getById,
  updateStatus,
  cancel,
  checkAvailability,
  listProviderBookings
};