<?php

namespace App\Controllers;

use App\Services\Installer;
use App\Config\AppConfig;
use App\Config\Database;
use App\Models\User;
use App\Models\Config;

class InstallController
{
    public static function status(): void
    {
        $installed = Installer::isInstalled();
        echo json_encode(['success' => true, 'data' => ['installed' => $installed]]);
    }

    public static function testDb(): void
    {
        $input = json_decode(file_get_contents('php://input'), true);
        $host = $input['host'] ?? '';
        $port = $input['port'] ?? 3306;
        $user = $input['user'] ?? '';
        $password = $input['password'] ?? '';
        $database = $input['database'] ?? '';

        if (!$host || !$user || !$database) {
            http_response_code(400);
            echo json_encode(['success' => false, 'message' => '缺少必要参数']);
            return;
        }

        try {
            $dsn = "mysql:host={$host};port={$port};dbname={$database};charset=utf8mb4";
            $pdo = new \PDO($dsn, $user, $password, [
                \PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION
            ]);
            echo json_encode(['success' => true, 'message' => '数据库连接成功']);
        } catch (\PDOException $e) {
            http_response_code(500);
            echo json_encode(['success' => false, 'message' => '数据库连接失败: ' . $e->getMessage()]);
        }
    }

    public static function setup(): void
    {
        if (Installer::isInstalled()) {
            http_response_code(400);
            echo json_encode(['success' => false, 'message' => '系统已安装，不能重复安装']);
            return;
        }

        $input = json_decode(file_get_contents('php://input'), true);
        $username = $input['username'] ?? '';
        $password = $input['password'] ?? '';
        $dbConfig = $input['dbConfig'] ?? [];
        $providers = $input['providers'] ?? [];

        if (!$username || !$password) {
            http_response_code(400);
            echo json_encode(['success' => false, 'message' => '用户名和密码不能为空']);
            return;
        }
        if (strlen($password) < 6) {
            http_response_code(400);
            echo json_encode(['success' => false, 'message' => '密码长度不能少于6位']);
            return;
        }
        if (!$dbConfig || !$dbConfig['host'] || !$dbConfig['user'] || !$dbConfig['database']) {
            http_response_code(400);
            echo json_encode(['success' => false, 'message' => '请填写数据库配置']);
            return;
        }
        if (!is_array($providers) || count($providers) === 0) {
            http_response_code(400);
            echo json_encode(['success' => false, 'message' => '请至少配置一个AI服务提供商']);
            return;
        }

        try {
            $dsn = "mysql:host={$dbConfig['host']};port=" . ($dbConfig['port'] ?? 3306) . ";dbname={$dbConfig['database']};charset=utf8mb4";
            $pdo = new \PDO($dsn, $dbConfig['user'], $dbConfig['password'], [\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION]);
        } catch (\PDOException $e) {
            http_response_code(400);
            echo json_encode(['success' => false, 'message' => '数据库连接失败: ' . $e->getMessage()]);
            return;
        }

        $configDir = __DIR__ . '/../../config';
        file_put_contents($configDir . '/db-config.json', json_encode($dbConfig, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));

        try {
            Installer::runMigration();
        } catch (\Exception $e) {
            http_response_code(500);
            echo json_encode(['success' => false, 'message' => '数据库迁移失败: ' . $e->getMessage()]);
            return;
        }

        Installer::seedDefaults();

        $admin = User::create(['username' => $username, 'password' => $password, 'role' => 'admin']);

        $jwtSecret = bin2hex(random_bytes(32));
        AppConfig::set('jwtSecret', $jwtSecret);
        AppConfig::set('jwtExpiry', 86400);
        AppConfig::set('corsOrigin', '');

        Config::setByKey('providers', json_encode($providers));

        echo json_encode([
            'success' => true,
            'message' => '安装成功',
            'data' => ['user' => $admin]
        ]);
    }
}