<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Http\Requests\Auth\LoginRequest;
use App\Http\Requests\Auth\RegisterRequest;
use App\Http\Resources\UserResource;
use App\Models\User;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Str;
use OpenApi\Attributes as OA;

class AuthController extends Controller
{
    #[OA\Post(
        path: '/auth/register',
        description: 'Register a new user account',
        summary: 'Register',
        tags: ['Auth'],
        requestBody: new OA\RequestBody(
            required: true,
            content: new OA\JsonContent(
                required: ['name', 'mobile', 'email', 'password'],
                properties: [
                    new OA\Property(property: 'name', type: 'string', example: 'علی رضایی'),
                    new OA\Property(property: 'mobile', type: 'string', example: '09123456789'),
                    new OA\Property(property: 'email', type: 'string', format: 'email', example: 'ali@example.com'),
                    new OA\Property(property: 'password', type: 'string', format: 'password', example: 'password123'),
                ]
            )
        ),
        responses: [
            new OA\Response(
                response: 201,
                description: 'Registered successfully',
                content: new OA\JsonContent(
                    properties: [
                        new OA\Property(property: 'message', type: 'string', example: 'ثبت‌نام با موفقیت انجام شد.'),
                        new OA\Property(
                            property: 'data',
                            properties: [
                                new OA\Property(property: 'user', ref: '#/components/schemas/User'),
                                new OA\Property(property: 'token', type: 'string'),
                            ],
                            type: 'object'
                        ),
                    ]
                )
            ),
            new OA\Response(response: 422, description: 'Validation error'),
        ]
    )]
    public function register(RegisterRequest $request): JsonResponse
    {
        $user = User::query()->create([
            'name' => $request->validated('name'),
            'username' => $this->generateUsername($request->validated('email')),
            'mobile' => $request->validated('mobile'),
            'email' => $request->validated('email'),
            'password' => $request->validated('password'),
        ]);

        $token = $user->createToken('auth-token')->plainTextToken;

        return response()->json([
            'message' => 'ثبت‌نام با موفقیت انجام شد.',
            'data' => [
                'user' => new UserResource($user),
                'token' => $token,
            ],
        ], 201);
    }

    #[OA\Post(
        path: '/auth/login',
        description: 'Login with email or username',
        summary: 'Login',
        tags: ['Auth'],
        requestBody: new OA\RequestBody(
            required: true,
            content: new OA\JsonContent(
                required: ['login', 'password'],
                properties: [
                    new OA\Property(property: 'login', description: 'Email or username', type: 'string', example: 'ali@example.com'),
                    new OA\Property(property: 'password', type: 'string', format: 'password', example: 'password123'),
                ]
            )
        ),
        responses: [
            new OA\Response(
                response: 200,
                description: 'Logged in successfully',
                content: new OA\JsonContent(
                    properties: [
                        new OA\Property(property: 'message', type: 'string', example: 'ورود با موفقیت انجام شد.'),
                        new OA\Property(
                            property: 'data',
                            properties: [
                                new OA\Property(property: 'user', ref: '#/components/schemas/User'),
                                new OA\Property(property: 'token', type: 'string'),
                            ],
                            type: 'object'
                        ),
                    ]
                )
            ),
            new OA\Response(response: 422, description: 'Invalid credentials'),
        ]
    )]
    public function login(LoginRequest $request): JsonResponse
    {
        $login = $request->validated('login');

        $user = User::query()
            ->where(function ($query) use ($login): void {
                $query->where('email', $login)
                    ->orWhere('username', $login);
            })
            ->first();

        if (! $user || ! Hash::check($request->validated('password'), $user->password)) {
            return response()->json([
                'message' => 'اطلاعات ورود نادرست است.',
                'errors' => [
                    'login' => ['ایمیل یا نام کاربری یا رمز عبور اشتباه است.'],
                ],
            ], 422);
        }

        $token = $user->createToken('auth-token')->plainTextToken;

        return response()->json([
            'message' => 'ورود با موفقیت انجام شد.',
            'data' => [
                'user' => new UserResource($user),
                'token' => $token,
            ],
        ]);
    }

    private function generateUsername(string $email): string
    {
        $base = Str::slug(Str::before($email, '@'), '') ?: 'user';
        $username = $base;
        $counter = 1;

        while (User::query()->where('username', $username)->exists()) {
            $username = $base.$counter;
            $counter++;
        }

        return $username;
    }
}