<?php

namespace App\Http\Controllers;

use App\Models\Booking;
use App\Models\Services;
use App\Models\EmployeeAvailability;
use Illuminate\Http\Request;
use Illuminate\Support\Str;

class BookingsController extends Controller
{
    public function store(Request $request)
    {
        $request->validate([
            'service_id' => 'required|exists:services,id',
            'employee_id' => 'required|exists:users,id',
            'date' => 'required|date',
            'starttime' => 'required'
        ]);

        $clientId = auth()->id();
        if (!$clientId) {
            return response()->json(['error' => 'Авторизация обязательна'], 401);
        }

        $service = Services::where('id', $request->service_id)
            ->where('isactive', true)
            ->first();
        if (!$service) {
            return response()->json(['error' => 'Услуга неактивна или не найдена'], 400);
        }

        $durationMinutes = $service->durationminutes;
        $endtime = date('H:i:s', strtotime($request->starttime . " +{$durationMinutes} minutes"));

        $availability = EmployeeAvailability::where('employee_id', $request->employee_id)
            ->where('date', $request->date)
            ->where('starttime', '<=', $request->starttime)
            ->where('endtime', '>=', $endtime)
            ->where('isavailable', true)
            ->first();

        if (!$availability) {
            return response()->json(['error' => 'Сотрудник недоступен в это время'], 400);
        }

        $bookingExists = Booking::where('employee_id', $request->employee_id)
            ->where('bookingdate', $request->date)
            ->where('starttime', $request->starttime)
            ->whereIn('status', ['confirmed', 'completed'])
            ->exists();

        if ($bookingExists) {
            return response()->json(['error' => 'Слот уже забронирован'], 400);
        }

        $bookingNumber = 'CL-' . date('Y') . '-' . str_pad(Booking::count() + 1, 4, '0', STR_PAD_LEFT);

        $booking = Booking::create([
            'bookingnumber' => $bookingNumber,
            'client_id' => $clientId,
            'employee_id' => $request->employee_id,
            'service_id' => $request->service_id,
            'bookingdate' => $request->date,
            'starttime' => $request->starttime,
            'endtime' => $endtime,
            'status' => 'confirmed'
        ]);

        return response()->json([
            'booking' => $booking,
            'message' => 'Бронирование создано №' . $bookingNumber
        ], 201);
    }

    public function cancel(Request $request, $id)
    {
        $booking = Booking::findOrFail($id);
        
        if ($booking->client_id != auth()->id()) {
            return response()->json(['error' => 'Можете отменить только свою бронь'], 403);
        }
        
        if ($booking->status != 'confirmed') {
            return response()->json(['error' => 'Можно отменить только подтвержденные'], 400);
        }
        
        $booking->update([
            'status' => 'cancelled',
            'cancelledby' => 'client',
            'cancelreason' => $request->reason ?? null
        ]);
        
        return response()->json([
            'message' => 'Бронь отменена',
            'booking' => $booking
        ]);
    }

    public function adminCancel(Request $request, $id)
    {
        $booking = Booking::findOrFail($id);
        
        if (!auth()->user()->isEmployeeOrAdmin()) {
            return response()->json(['error' => 'Доступ только для админов/сотрудников'], 403);
        }
        
        $booking->update([
            'status' => 'cancelled',
            'cancelledby' => 'admin',
            'cancelreason' => $request->reason ?? null
        ]);
        
        return response()->json([
            'message' => 'Бронь отменена администратором',
            'booking' => $booking
        ]);
    }

    public function clientIndex(Request $request)
    {
        $clientId = auth()->id();
        
        $query = Booking::where('client_id', $clientId);
        
        if ($request->date) {
            $query->where('bookingdate', $request->date);
        }
        if ($request->status) {
            $query->where('status', $request->status);
        }
        
        $bookings = $query->with(['service', 'employee'])
            ->orderBy('bookingdate', 'desc')
            ->orderBy('starttime', 'asc')
            ->get();
            
        return response()->json($bookings);
    }

    public function adminIndex(Request $request)
    {
        if (!auth()->user()->isEmployeeOrAdmin()) {
            return response()->json(['error' => 'Доступ запрещен'], 403);
        }
        
        $query = Booking::with(['service', 'client', 'employee']);
        
        if ($request->date) {
            $query->where('bookingdate', $request->date);
        }
        if ($request->status) {
            $query->where('status', $request->status);
        }
        if ($request->employee_id) {
            $query->where('employee_id', $request->employee_id);
        }
        
        $bookings = $query->orderBy('bookingdate', 'desc')
            ->orderBy('starttime', 'asc')
            ->get();
            
        return response()->json($bookings);
    }
}