<?php

namespace Modules\Restaurant\Repositories;

use Exception;
use Modules\Restaurant\Models\Reservation;
use Modules\Restaurant\Models\ReservationUnavailable;

class ReservationRepository
{
    public function getAll(array $filters = [])
    {
        $query = Reservation::with(['table', 'customer']);

        if (! empty($filters['restaurant_id'])) {
            $query->where('restaurant_id', $filters['restaurant_id']);
        }

        if (! empty($filters['date'])) {
            $query->whereDate('reservation_date', $filters['date']);
        }

        if (! empty($filters['status'])) {
            $query->where('status', $filters['status']);
        }

        if (! empty($filters['search'])) {
            $search = $filters['search'];
            $query->where(function ($q) use ($search) {
                $q->where('note', 'like', "%$search%");
            });
        }

        $sortBy = $filters['sort_by'] ?? 'reservation_date';
        $sortOrder = $filters['sort_order'] ?? 'desc';

        $query->orderBy($sortBy, $sortOrder);

        $perPage = $filters['perPage'] ?? 10;

        return $query->paginate($perPage);
    }

    public function store(array $data)
    {
        $this->checkAvailability($data);

        return Reservation::create($data);
    }

    public function checkAvailability(array $data)
    {
        $date = $data['reservation_date'];
        $start = $data['start_time'];
        $end = $data['end_time'];
        $tableId = $data['table_id'];

        // check unavailable tables
        $unavailable = ReservationUnavailable::where('table_id', $tableId)
            ->where('date', $date)
            ->where(function ($q) use ($start, $end) {
                $q->whereBetween('start_time', [$start, $end])
                    ->orWhereBetween('end_time', [$start, $end]);
            })
            ->exists();

        if ($unavailable) {
            throw new Exception('This table is unavailable for the selected time.');
        }

        // check existing reservations
        $conflict = Reservation::where('table_id', $tableId)
            ->where('reservation_date', $date)
            ->where(function ($q) use ($start, $end) {
                $q->whereBetween('start_time', [$start, $end])
                    ->orWhereBetween('end_time', [$start, $end]);
            })
            ->whereNotIn('status', ['cancelled'])
            ->exists();

        if ($conflict) {
            throw new Exception('This table is already booked for the selected time.');
        }

        return true;
    }
}