<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\DB;

/**
 * متحكم الأكواد الترويجية (Promo Controller)
 * 
 * الغرض من الملف:
 * إدارة أكواد الخصم (Promo Codes) التي يستخدمها الركاب للحصول على تخفيضات.
 * 
 * كيفية العمل:
 * 1. يتحقق من صحة الكود المدخل وصلاحيته التاريخية.
 * 2. يطبق الخصم على سعر الرحلة إذا كان الكود صحيحاً.
 */
class PromoController extends Controller
{
    /** GET /v2/promos */
    public function index(Request $request): JsonResponse
    {
        $passengerId = $request->attributes->get('_jwt_user_id');

        $promos = DB::connection('primary')->table('promos')
            ->where(function ($q) use ($passengerId) {
                $q->where('passengerID', $passengerId)
                  ->orWhere('passengerID', 'none');
            })
            ->where(function ($q) {
                $q->whereNull('validity_end_date')
                  ->orWhere('validity_end_date', '>=', now()->toDateString());
            })
            ->get();

        return response()->json(['status' => 'success', 'message' => $promos]);
    }

    /** GET /v2/promos/check?code=XXX */
    public function check(Request $request): JsonResponse
    {
        $request->validate(['code' => 'required|string']);

        $promo = DB::connection('primary')->table('promos')
            ->where('promo_code', $request->input('code'))
            ->where(function ($q) {
                $q->whereNull('validity_end_date')
                  ->orWhere('validity_end_date', '>=', now()->toDateString());
            })
            ->first();

        if (!$promo) {
            return response()->json(['status' => 'failure', 'message' => 'Invalid promo code'], 404);
        }

        return response()->json([
            'status' => 'success',
            'data' => [
                'code' => $promo->promo_code,
                'amount' => $promo->amount,
                'description' => $promo->description,
            ],
        ]);
    }

    /** POST /v2/promos */
    public function store(Request $request): JsonResponse
    {
        $request->validate([
            'promo_code' => 'required|string|max:14',
            'amount' => 'required|string',
        ]);

        $passengerId = $request->attributes->get('_jwt_user_id');

        $exists = DB::connection('primary')->table('promos')
            ->where('passengerID', $passengerId)->exists();
        if ($exists) {
            return response()->json(['status' => 'failure', 'message' => 'Promo already assigned'], 409);
        }

        DB::connection('primary')->table('promos')->insert([
            'promo_code' => $request->input('promo_code'),
            'amount' => $request->input('amount'),
            'description' => $request->input('description'),
            'passengerID' => $passengerId,
            'validity_start_date' => $request->input('start_date'),
            'validity_end_date' => $request->input('end_date'),
        ]);

        return response()->json(['status' => 'success'], 201);
    }

    /** PUT /v2/promos/{id} */
    public function update(Request $request, int $id): JsonResponse
    {
        $passengerId = $request->attributes->get('_jwt_user_id');

        DB::connection('primary')->table('promos')
            ->where('id', $id)
            ->where('passengerID', $passengerId)
            ->update(array_filter([
                'promo_code' => $request->input('promo_code'),
                'amount' => $request->input('amount'),
                'description' => $request->input('description'),
                'validity_end_date' => $request->input('end_date'),
            ]));

        return response()->json(['status' => 'success']);
    }

    /** DELETE /v2/promos/{id} */
    public function destroy(Request $request, int $id): JsonResponse
    {
        $passengerId = $request->attributes->get('_jwt_user_id');
        DB::connection('primary')->table('promos')
            ->where('id', $id)
            ->where('passengerID', $passengerId)
            ->delete();
        return response()->json(['status' => 'success']);
    }
}