<?php
declare(strict_types=1);

namespace App\Controller;

use Fendx\Core\Annotation\Controller;
use Fendx\Core\Annotation\Inject;
use Fendx\Web\Annotation\GetRoute;
use Fendx\Web\Annotation\PostRoute;
use Fendx\Web\Annotation\PutRoute;
use Fendx\Web\Annotation\DeleteRoute;
use Fendx\Web\Request\Request;
use Fendx\Web\Response\Response;
use Fendx\Web\Validator\Validator;
use App\Service\UserService;

#[Controller('/api/users')]
class UserController
{
    #[Inject]
    private UserService $userService;

    #[GetRoute('/')]
    public function index(Request $request): array
    {
        $page = (int)($request->get('page', 1));
        $pageSize = min((int)($request->get('pageSize', 10)), 100);
        
        $result = $this->userService->getUsersPaginated($page, $pageSize);
        
        return Response::paginated(
            $result['users'],
            $result['total'],
            $result['page'],
            $result['pageSize']
        );
    }

    #[GetRoute('/{id}')]
    public function show(int $id): array
    {
        $user = $this->userService->getUser($id);
        
        if (!$user) {
            return Response::notFound('User not found');
        }
        
        return Response::success($user->toArray());
    }

    #[PostRoute('')]
    public function store(Request $request): array
    {
        $data = [
            'username' => $request->post('username'),
            'email' => $request->post('email'),
            'password' => $request->post('password'),
            'status' => (int)($request->post('status', 1))
        ];

        try {
            $user = $this->userService->createUser($data);
            return Response::success($user->toArray(), 'User created successfully');
        } catch (\Exception $e) {
            return Response::error($e->getCode(), $e->getMessage());
        }
    }

    #[PutRoute('/{id}')]
    public function update(int $id, Request $request): array
    {
        $data = $request->all();
        unset($data['id']); // 防止修改ID

        try {
            $success = $this->userService->updateUser($id, $data);
            
            if (!$success) {
                return Response::notFound('User not found');
            }
            
            $user = $this->userService->getUser($id);
            return Response::success($user->toArray(), 'User updated successfully');
        } catch (\Exception $e) {
            return Response::error($e->getCode(), $e->getMessage());
        }
    }

    #[DeleteRoute('/{id}')]
    public function destroy(int $id): array
    {
        try {
            $success = $this->userService->deleteUser($id);
            
            if (!$success) {
                return Response::notFound('User not found');
            }
            
            return Response::success(null, 'User deleted successfully');
        } catch (\Exception $e) {
            return Response::error($e->getCode(), $e->getMessage());
        }
    }

    #[GetRoute('/search')]
    public function search(Request $request): array
    {
        $keyword = $request->get('keyword', '');
        $page = (int)($request->get('page', 1));
        $pageSize = min((int)($request->get('pageSize', 10)), 100);
        
        if (empty($keyword)) {
            return Response::error(400, 'Keyword is required');
        }
        
        $result = $this->userService->searchUsers($keyword, $page, $pageSize);
        
        return Response::paginated(
            $result['users'],
            $result['total'],
            $result['page'],
            $result['pageSize']
        );
    }

    #[GetRoute('/active')]
    public function active(): array
    {
        $users = $this->userService->getActiveUsers();
        return Response::success($users);
    }

    #[GetRoute('/stats')]
    public function stats(): array
    {
        $stats = [
            'total_users' => $this->userService->getUsersCount(),
            'active_users' => $this->userService->getActiveUsersCount(),
            'inactive_users' => $this->userService->getUsersCount() - $this->userService->getActiveUsersCount()
        ];
        
        return Response::success($stats);
    }

    #[PutRoute('/{id}/status')]
    public function toggleStatus(int $id): array
    {
        try {
            $success = $this->userService->toggleUserStatus($id);
            
            if (!$success) {
                return Response::notFound('User not found');
            }
            
            return Response::success(null, 'User status updated successfully');
        } catch (\Exception $e) {
            return Response::error($e->getCode(), $e->getMessage());
        }
    }

    #[PutRoute('/{id}/password')]
    public function changePassword(int $id, Request $request): array
    {
        $data = [
            'old_password' => $request->post('old_password'),
            'new_password' => $request->post('new_password')
        ];

        $validator = Validator::make($data, [
            'old_password' => 'required',
            'new_password' => 'required|min:6'
        ]);

        if (!$validator->validate()) {
            return Response::validationError('Validation failed', $validator->errors());
        }

        try {
            $success = $this->userService->changePassword($id, $data['old_password'], $data['new_password']);
            
            if (!$success) {
                return Response::notFound('User not found');
            }
            
            return Response::success(null, 'Password changed successfully');
        } catch (\Exception $e) {
            return Response::error($e->getCode(), $e->getMessage());
        }
    }

    #[GetRoute('/{id}/exists')]
    public function exists(int $id): array
    {
        $user = $this->userService->getUser($id);
        return Response::success(['exists' => $user !== null]);
    }

    #[PostRoute('/check-email')]
    public function checkEmail(Request $request): array
    {
        $email = $request->post('email');
        
        if (empty($email)) {
            return Response::error(400, 'Email is required');
        }
        
        $user = $this->userService->getUserByEmail($email);
        return Response::success(['exists' => $user !== null]);
    }

    #[PostRoute('/check-username')]
    public function checkUsername(Request $request): array
    {
        $username = $request->post('username');
        
        if (empty($username)) {
            return Response::error(400, 'Username is required');
        }
        
        $user = $this->userService->getUserByUsername($username);
        return Response::success(['exists' => $user !== null]);
    }
}