<?php

declare(strict_types=1);

namespace app\adminapi\logic\order;

use app\common\model\Order;
use app\common\model\OrderDetail;
use think\facade\Db;

/**
 * 订单业务逻辑
 * Class OrderLogic
 * @package app\adminapi\logic\order
 */
class OrderLogic
{
    /**
     * @notes 生成订单号
     * @return string
     */
    public static function generateOrderNo(): string
    {
        return 'ORD' . date('YmdHis') . mt_rand(100000, 999999);
    }

    /**
     * @notes 创建订单
     * @param array $params
     * @return Order|false
     */
    public static function create(array $params)
    {
        try {
            $order = new Order();
            $order->order_no = self::generateOrderNo();
            $order->patient_id = $params['patient_id'];
            $order->creator_id = $params['creator_id'];
            $order->order_type = $params['order_type'];
            $order->amount = $params['amount'];
            $order->status = 1; // 待支付
            $order->remark = $params['remark'] ?? '';
            $order->save();
            
            return $order;
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return false;
        }
    }

    /**
     * @notes 编辑订单
     * @param int $id
     * @param array $params
     * @return bool
     */
    public static function edit(int $id, array $params): bool
    {
        try {
            $order = Order::find($id);
            if (!$order) {
                self::setError('订单不存在');
                return false;
            }
            
            if (isset($params['remark'])) {
                $order->remark = $params['remark'];
            }
            
            $order->save();
            return true;
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return false;
        }
    }

    /**
     * @notes 支付订单
     * @param int $id
     * @param string $paymentMethod
     * @return bool
     */
    public static function pay(int $id, string $paymentMethod): bool
    {
        try {
            $order = Order::find($id);
            if (!$order) {
                self::setError('订单不存在');
                return false;
            }
            
            if ($order->status != 1) {
                self::setError('订单状态不允许支付');
                return false;
            }
            
            $order->status = 2; // 已支付
            $order->payment_method = $paymentMethod;
            $order->payment_time = date('Y-m-d H:i:s');
            $order->save();
            
            return true;
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return false;
        }
    }

    /**
     * @notes 取消订单
     * @param int $id
     * @return bool
     */
    public static function cancel(int $id): bool
    {
        try {
            $order = Order::find($id);
            if (!$order) {
                self::setError('订单不存在');
                return false;
            }
            
            if ($order->status != 1) {
                self::setError('只有待支付的订单才能取消');
                return false;
            }
            
            $order->status = 3; // 已取消
            $order->save();
            
            return true;
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return false;
        }
    }

    /**
     * @notes 退款订单
     * @param int $id
     * @return bool
     */
    public static function refund(int $id): bool
    {
        try {
            $order = Order::find($id);
            if (!$order) {
                self::setError('订单不存在');
                return false;
            }
            
            if ($order->status != 2) {
                self::setError('只有已支付的订单才能退款');
                return false;
            }
            
            $order->status = 4; // 已退款
            $order->save();
            
            return true;
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return false;
        }
    }

    /**
     * @notes 删除订单
     * @param int $id
     * @return bool
     */
    public static function delete(int $id): bool
    {
        try {
            $order = Order::find($id);
            if (!$order) {
                self::setError('订单不存在');
                return false;
            }
            
            // 删除订单
            $order->delete();
            
            return true;
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return false;
        }
    }

    /**
     * @notes 获取订单详情
     * @param int $id
     * @return array|null
     */
    public static function detail(int $id): ?array
    {
        $order = Order::with(['patient', 'creator'])
            ->find($id);
        
        if (!$order) {
            return null;
        }
        
        return $order->toArray();
    }

    private static $error = '';

    public static function setError(string $error): void
    {
        self::$error = $error;
    }

    public static function getError(): string
    {
        return self::$error;
    }

    /**
     * @notes 生成支付宝签名
     * @param array $params
     * @param string $privateKey
     * @return string
     */
    private static function generateAlipaySign(array $params, string $privateKey): string
    {
        // 移除sign字段
        unset($params['sign']);
        
        // 按键排序
        ksort($params);
        
        // 构建签名字符串
        $signStr = '';
        foreach ($params as $key => $value) {
            if ($value !== '' && $value !== null) {
                $signStr .= $key . '=' . $value . '&';
            }
        }
        $signStr = rtrim($signStr, '&');
        
        // 使用私钥签名
        $privateKeyResource = openssl_pkey_get_private($privateKey);
        openssl_sign($signStr, $sign, $privateKeyResource, OPENSSL_ALGO_SHA256);
        openssl_free_key($privateKeyResource);
        
        return base64_encode($sign);
    }

    /**
     * @notes 生成微信签名
     * @param array $params
     * @param string $apiKey
     * @return string
     */
    private static function generateWechatSign(array $params, string $apiKey): string
    {
        // 移除sign字段
        unset($params['sign']);
        
        // 按键排序
        ksort($params);
        
        // 构建签名字符串
        $signStr = '';
        foreach ($params as $key => $value) {
            if ($value !== '' && $value !== null) {
                $signStr .= $key . '=' . $value . '&';
            }
        }
        $signStr .= 'key=' . $apiKey;
        
        // MD5签名
        return strtoupper(md5($signStr));
    }

    /**
     * @notes 生成随机字符串
     * @param int $length
     * @return string
     */
    private static function generateNonceStr(int $length = 32): string
    {
        $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
        $str = '';
        for ($i = 0; $i < $length; $i++) {
            $str .= $chars[mt_rand(0, strlen($chars) - 1)];
        }
        return $str;
    }

    /**
     * @notes 支付宝支付
     * @param $order
     * @return string|false
     */
    public static function alipayPay($order)
    {
        try {
            // 这里调用支付宝SDK生成支付链接
            // 示例：生成支付宝支付URL
            $payUrl = self::generateAlipayUrl($order);
            return $payUrl;
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return false;
        }
    }

    /**
     * @notes 微信支付
     * @param $order
     * @return array|false
     */
    public static function wechatPay($order)
    {
        try {
            // 这里调用微信SDK生成支付二维码或链接
            // 示例：生成微信支付数据
            $payData = self::generateWechatPayData($order);
            return $payData;
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return false;
        }
    }

    /**
     * @notes 生成支付宝支付URL
     * @param $order
     * @return string
     */
    private static function generateAlipayUrl($order): string
    {
        try {
            // 获取订单号
            $orderNo = is_array($order) ? $order['order_no'] : $order->order_no;
            $amount = is_array($order) ? ($order['amount'] ?? 0) : $order->amount;
            
            // 获取支付宝配置
            $alipayConfig = config('pay.alipay');
            
            if (empty($alipayConfig['app_id']) || empty($alipayConfig['merchant_private_key'])) {
                throw new \Exception('支付宝配置不完整');
            }
            
            // 使用支付宝SDK生成支付URL
            $params = [
                'app_id' => $alipayConfig['app_id'],
                'method' => 'alipay.trade.page.pay',
                'charset' => 'UTF-8',
                'sign_type' => 'RSA2',
                'timestamp' => date('Y-m-d H:i:s'),
                'version' => '1.0',
                'notify_url' => $alipayConfig['notify_url'] ?: config('app.url') . '/api/order/alipay-notify',
                'return_url' => $alipayConfig['return_url'] ?: config('app.url') . '/order',
                'biz_content' => json_encode([
                    'out_trade_no' => $orderNo,
                    'product_code' => 'FAST_INSTANT_TRADE_PAY',
                    'total_amount' => $amount,
                    'subject' => '订单支付',
                    'body' => '订单号：' . $orderNo,
                ], JSON_UNESCAPED_UNICODE),
            ];
            
            // 生成签名
            $sign = self::generateAlipaySign($params, $alipayConfig['merchant_private_key']);
            $params['sign'] = $sign;
            
            // 生成支付URL
            $payUrl = $alipayConfig['gateway_url'] . '?' . http_build_query($params);
            
            return $payUrl;
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return '';
        }
    }

    /**
     * @notes 生成微信支付数据
     * @param $order
     * @return array
     */
    private static function generateWechatPayData($order): array
    {
        try {
            // 获取订单号
            $orderNo = is_array($order) ? $order['order_no'] : $order->order_no;
            $amount = is_array($order) ? ($order['amount'] ?? 0) : $order->amount;
            
            // 获取微信配置
            $wechatConfig = config('pay.wechat');
            
            if (empty($wechatConfig['app_id']) || empty($wechatConfig['mch_id']) || empty($wechatConfig['api_key'])) {
                throw new \Exception('微信支付配置不完整');
            }
            
            // 生成微信支付数据
            $payData = [
                'appid' => $wechatConfig['app_id'],
                'mch_id' => $wechatConfig['mch_id'],
                'nonce_str' => self::generateNonceStr(),
                'body' => '订单支付',
                'out_trade_no' => $orderNo,
                'total_fee' => (int)($amount * 100), // 转换为分
                'spbill_create_ip' => request()->ip() ?: '127.0.0.1',
                'notify_url' => $wechatConfig['notify_url'] ?: config('app.url') . '/api/order/wechat-notify',
                'trade_type' => 'NATIVE', // 二维码支付
            ];
            
            // 生成签名
            $sign = self::generateWechatSign($payData, $wechatConfig['api_key']);
            $payData['sign'] = $sign;
            
            // 返回支付数据
            return [
                'pay_url' => $wechatConfig['gateway_url'] . '/pay/unifiedorder',
                'pay_data' => $payData,
                'order_no' => $orderNo,
            ];
        } catch (\Exception $e) {
            self::setError($e->getMessage());
            return [];
        }
    }
}