<?php

namespace App\Http\Controllers;

use App\Models\User;
use Illuminate\Http\Request;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\Hash;

class AuthController extends Controller
{
    /**
     * Register a new user
     * 
     * @param Request $request
     * @return JsonResponse
     */
    public function register(Request $request): JsonResponse
    {
        $request->validate([
            'name' => 'required|string|max:255',
            'email' => 'required|string|email|max:255|unique:users',
            'password' => 'required|string|min:8',
        ]);

        $user = User::create([
            'name' => $request->name,
            'email' => $request->email,
            'password' => Hash::make($request->password),
        ]);

        return response()->json([
            'success' => true,
            'message' => 'User created successfully',
            'data' => $user
        ], 201);
    }

    public function getAllUsers(Request $request): JsonResponse
    {
        $user = $request->user();

        // Optional: Ensure only users with 'admin' ability can access this
        if (!$user || !$request->user()->tokenCan('admin')) {
            return response()->json([
                'success' => false,
                'message' => 'Unauthorized'
            ], 403);
        }

        $users = User::all();

        return response()->json([
            'success' => true,
            'data' => $users
        ]);
    }

    /**
     * Login and generate token
     * 
     * @param Request $request
     * @return JsonResponse
     */
    public function login(Request $request): JsonResponse
    {
        $request->headers->set('Accept', 'application/json');
        
        $request->validate([
            'email' => 'required|email',
            'password' => 'required',
            'device_name' => 'nullable|string',
        ]);

        $user = User::where('email', $request->email)->first();

        if (!$user || !Hash::check($request->password, $user->password)) {
            return response()->json([
                'success' => false,
                'message' => 'Invalid credentials',
            ], 401);
        }

        // Delete existing tokens for the same device name
        if ($request->device_name) {
            $user->tokens()->where('name', $request->device_name)->delete();
        }

        // All users will get the same 'admin' ability (since dashboard is admin-only)
        $token = $user->createToken($request->device_name ?? 'api_token', ['admin']);

        $tokenExpiration = null;
        $expirationMinutes = config('sanctum.expiration');
        if ($expirationMinutes) {
            $tokenExpiration = now()->addMinutes($expirationMinutes)->toDateTimeString();
        }

        return response()->json([
            'success' => true,
            'message' => 'User signed in successfully',
            'token' => $token->plainTextToken,
            'token_type' => 'Bearer',
            'expires_at' => $tokenExpiration,
            'user' => [
                'id' => $user->id,
                'name' => $user->name,
                'email' => $user->email,
                'abilities' => ['admin']
            ]
        ]);
    }

    /**
     * Update authenticated user's account
     * 
     * @param Request $request
     * @return JsonResponse
     */
    public function update(Request $request)
    {
        $user = $request->user();
    
        // Validate incoming request
        $request->validate([
            'name' => 'required|string|max:255',
            'email' => 'required|email|unique:users,email,' . $user->id,
            'current_password' => 'required|string',
            'password' => 'nullable|string|confirmed|min:6',
        ]);
    
        // Check if current password is correct
        if (!\Hash::check($request->current_password, $user->password)) {
            return response()->json([
                'success' => false,
                'message' => 'Current password is incorrect',
            ], 422);
        }
    
        // Update user data
        $user->name = $request->name;
        $user->email = $request->email;
    
        if ($request->filled('password')) {
            $user->password = bcrypt($request->password);
        }
    
        $user->save();
    
        return response()->json([
            'success' => true,
            'message' => 'Account updated successfully',
            'user' => $user,
        ]);
    }

    /**
     * Logout (revoke token)
     * 
     * @param Request $request
     * @return JsonResponse
     */
    public function logout(Request $request): JsonResponse
    {
        $request->user()->currentAccessToken()->delete();

        return response()->json([
            'success' => true,
            'message' => 'Logged out successfully'
        ]);
    }

    /**
     * Get the authenticated user
     * 
     * @param Request $request
     * @return JsonResponse
     */
    public function me(Request $request): JsonResponse
    {
        $user = $request->user();
    
        if (!$user) {
            return response()->json([
                'success' => false,
                'message' => 'User not authenticated',
            ], 401);
        }
    
        return response()->json([
            'success' => true,
            'data' => [
                'user' => [
                    'id' => $user->id,
                    'name' => $user->name,
                    'email' => $user->email,
                ],
                'abilities' => $request->user()->currentAccessToken()?->abilities ?? [],
            ]
        ]);
    }
    
}