<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\Car;
use App\Models\ParkingRecord;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;
use Illuminate\Support\Facades\DB;

class CarParkingController extends Controller
{

    public function registerCar(Request $request) {

        $data = $request->validate([
            'plate_number' => 'required|string|max:20',
        ]);

        $car = Car::where('plate_number', $data['plate_number'])->first();

        if ($car) {
            return response()->json(['message' => 'Car already registered', 'car' => $car], 200);
        }

        $car = Car::create($data);

        return response()->json(['message' => 'Car registered successfully', 'car' => $car], 201);
        
    }

    public function registerEntry(Request $request) {

        $data = $request->validate([
            'plate_number' => 'required|string|exists:cars,plate_number',
        ]);

        $car = Car::where('plate_number', $data['plate_number'])->first();

        // Check if there is an active parking record (entry_time set but exit_time null)
        $activeParking = ParkingRecord::where('car_id', $car->id)
            ->whereNull('exit_time')
            ->first();

        if ($activeParking) {
            return response()->json(['message' => 'Car already parked inside'], 400);
        }

        $parkingRecord = ParkingRecord::create([
            'car_id' => $car->id,
            'entry_time' => now(),
        ]);

        return response()->json(['message' => 'Car entry registered', 'parking_record' => $parkingRecord], 201);

    }

    public function registerExit(Request $request) {

        $data = $request->validate([
            'plate_number' => 'required|string|exists:cars,plate_number',
        ]);

        $car = Car::where('plate_number', $data['plate_number'])->first();

        $activeParking = ParkingRecord::where('car_id', $car->id)
            ->whereNull('exit_time')
            ->first();

        if (!$activeParking) {
            return response()->json(['message' => 'Car is not currently parked inside'], 400);
        }

        $activeParking->exit_time = now();
        $activeParking->save();

        return response()->json(['message' => 'Car exit registered', 'parking_record' => $activeParking]);

    }

    public function countCurrentParking() {

        $count = ParkingRecord::whereNull('exit_time')->count();
        return response()->json(['current_parked_cars' => $count]);

    }

    public function getCarHistory(Request $request) {

        $data = $request->validate([
            'plate_number' => 'required|string|exists:cars,plate_number',
        ]);

        $car = Car::where('plate_number', $data['plate_number'])->first();
        $history = $car->parkingRecords()->orderBy('entry_time', 'desc')->get(['entry_time', 'exit_time']);

        return response()->json([
            'plate_number' => $car->plate_number,
            'history' => $history
        ]);

    }

}