package xy_sh

import (
	"context"
	"encoding/json"
	"fmt"
	"log"
	"net/http"
	"net/http/httptest"
	"strings"
)

// ExampleClient_PlaceOrder 演示卡券/直充权益下单
func ExampleClient_PlaceOrder() {
	// 模拟供应商服务端
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		// 读取请求体
		var req EncryptedRequest
		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
			http.Error(w, "bad request", http.StatusBadRequest)
			return
		}

		// 验证签名（实际生产环境需要验证）
		timestamp := r.Header.Get("timestamp")
		sign := r.Header.Get("sign")
		_ = timestamp
		_ = sign

		// 模拟响应
		resp := EncryptedResponse{
			Code: 0,
			Msg:  "请求成功",
			Data: strPtr(`{"orderNo":"HM17575805323790000127073398f3772c00","expireTime":"2025-09-12 00:00:00","couponNo":"27073398f3772c00","couponCode":"27073398f3772c00","status":1}`),
		}
		w.Header().Set("Content-Type", "application/json")
		json.NewEncoder(w).Encode(resp)
	}))
	defer server.Close()

	// 初始化客户端
	// 注意：SM4密钥必须为16字节
	sm4Key := []byte("1234567890abcdef") // 16字节密钥
	sm3Salt := "my_sm3_salt_value"
	baseURL := server.URL

	client, err := NewClient(sm4Key, sm3Salt, baseURL)
	if err != nil {
		log.Fatalf("创建客户端失败: %v", err)
	}

	// 调用下单接口
	req := &PlaceOrderRequest{
		ActCode:     "ACT001",
		GoodsCode:   "123456",
		ActOrderNum: "00001",
		Account:     "19912345678",
		CallbackUrl: "https://xxx/notice",
	}

	resp, data, err := client.PlaceOrder(context.Background(), req)
	if err != nil {
		log.Fatalf("下单失败: %v", err)
	}

	if resp.Code != 0 {
		fmt.Printf("下单失败: %s\n", resp.Msg)
		return
	}

	fmt.Printf("订单号: %s\n", data.OrderNo)
	fmt.Printf("卡号: %s\n", data.CouponNo)
	fmt.Printf("卡密: %s\n", data.CouponCode)
	fmt.Printf("状态: %d\n", data.Status)
	fmt.Printf("有效期: %s\n", data.ExpireTime)

	// Output:
	// 订单号: HM17575805323790000127073398f3772c00
	// 卡号: 27073398f3772c00
	// 卡密: 27073398f3772c00
	// 状态: 1
	// 有效期: 2025-09-12 00:00:00
}

// ExampleClient_QueryOrder 演示订单查询
func ExampleClient_QueryOrder() {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		resp := EncryptedResponse{
			Code: 0,
			Msg:  "请求成功",
			Data: strPtr(`{"orderNo":"HM1757046717684000102707339840b23222","cardInfo":"{\"couponNo\":\"11111\",\"couponCode\":\"12334\",\"expireTime\":\"2029-03-09 00:00:00\"}","status":3}`),
		}
		w.Header().Set("Content-Type", "application/json")
		json.NewEncoder(w).Encode(resp)
	}))
	defer server.Close()

	client, _ := NewClient([]byte("1234567890abcdef"), "my_sm3_salt", server.URL)

	req := &QueryOrderRequest{
		ActCode: "FBG6vdYqGE4mGX7EH/woEg==",
		OrderNo: "HM1757046717684000102707339840b23222",
	}

	resp, data, err := client.QueryOrder(context.Background(), req)
	if err != nil {
		log.Fatalf("查询失败: %v", err)
	}

	if resp.Code != 0 {
		fmt.Printf("查询失败: %s\n", resp.Msg)
		return
	}

	fmt.Printf("订单号: %s\n", data.OrderNo)
	fmt.Printf("状态: %d\n", data.Status)
	if data.CardInfo != nil {
		fmt.Printf("卡号: %s\n", data.CardInfo.CouponNo)
		fmt.Printf("卡密: %s\n", data.CardInfo.CouponCode)
		fmt.Printf("过期时间: %s\n", data.CardInfo.ExpireTime)
	}

	// Output:
	// 订单号: HM1757046717684000102707339840b23222
	// 状态: 3
	// 卡号: 11111
	// 卡密: 12334
	// 过期时间: 2029-03-09 00:00:00
}

// ExampleClient_WechatRecharge 演示微信立减金充值
func ExampleClient_WechatRecharge() {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		resp := EncryptedResponse{
			Code: 0,
			Msg:  "请求成功",
			Data: strPtr(`{"orderNo":"0001","couponId":"123456","status":1}`),
		}
		w.Header().Set("Content-Type", "application/json")
		json.NewEncoder(w).Encode(resp)
	}))
	defer server.Close()

	client, _ := NewClient([]byte("1234567890abcdef"), "my_sm3_salt", server.URL)

	req := &WechatRechargeRequest{
		ActCode:     "FBG6vdYqGE4mGX7EH/woEg==",
		GoodsCode:   "0001",
		ActOrderNum: "0001",
		OpenId:      "0001",
		AppId:       "00001",
	}

	resp, data, err := client.WechatRecharge(context.Background(), req)
	if err != nil {
		log.Fatalf("充值失败: %v", err)
	}

	if resp.Code != 0 {
		fmt.Printf("充值失败: %s\n", resp.Msg)
		return
	}

	fmt.Printf("订单号: %s\n", data.OrderNo)
	fmt.Printf("优惠ID: %s\n", data.CouponId)
	fmt.Printf("状态: %d\n", data.Status)

	// Output:
	// 订单号: 0001
	// 优惠ID: 123456
	// 状态: 1
}

// ExampleClient_ParseNotifyRequest 演示解析回调通知
func ExampleClient_ParseNotifyRequest() {
	client, _ := NewClient([]byte("1234567890abcdef"), "my_sm3_salt", "http://example.com")

	// 模拟供应商发来的回调通知
	notifyData := NotifyRequest{
		OrderNo:     "HM202509291010001",
		ActOrderNum: "XY2025092910100001",
		Status:      3,
		Account:     "19912345678",
	}

	// 加密并签名（模拟供应商端操作）
	encryptedData, timestamp, sign, err := client.encryptAndSign(notifyData)
	if err != nil {
		log.Fatalf("加密失败: %v", err)
	}

	// 构建HTTP请求
	reqBody := fmt.Sprintf(`{"encryptedData":"%s"}`, encryptedData)
	httpReq := httptest.NewRequest(http.MethodPost, "/notify", strings.NewReader(reqBody))
	httpReq.Header.Set("Content-Type", "application/json")
	httpReq.Header.Set("timestamp", timestamp)
	httpReq.Header.Set("sign", sign)

	// 解析回调通知
	notifyReq, err := client.ParseNotifyRequest(httpReq)
	if err != nil {
		log.Fatalf("解析回调通知失败: %v", err)
	}

	fmt.Printf("订单号: %s\n", notifyReq.OrderNo)
	fmt.Printf("活动方订单号: %s\n", notifyReq.ActOrderNum)
	fmt.Printf("状态: %d\n", notifyReq.Status)
	fmt.Printf("账号: %s\n", notifyReq.Account)

	// 生成成功响应
	statusCode, body := NotifyResponseOK()
	fmt.Printf("响应状态码: %d\n", statusCode)
	fmt.Printf("响应内容: %s\n", body)

	// Output:
	// 订单号: HM202509291010001
	// 活动方订单号: XY2025092910100001
	// 状态: 3
	// 账号: 19912345678
	// 响应状态码: 200
	// 响应内容: ok
}

// strPtr 辅助函数：返回字符串指针
func strPtr(s string) *string {
	return &s
}