package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
)

func main() {
	// 设置路由和处理函数
	http.HandleFunc("/get-ecpm", func(w http.ResponseWriter, r *http.Request) {
		// 检查请求方法是否为GET
		if r.Method != http.MethodGet {
			http.Error(w, "Invalid request method", http.StatusMethodNotAllowed)
			return
		}

		// 从请求参数中获取所需的值
		openID := r.URL.Query().Get("open_id")
		mpID := r.URL.Query().Get("mp_id")
		dateHour := r.URL.Query().Get("date_hour")
		accessToken := r.URL.Query().Get("access_token")

		if openID == "" || mpID == "" || dateHour == "" || accessToken == "" {
			http.Error(w, "Missing required parameters", http.StatusBadRequest)
			return
		}

		// 构建请求体
		requestBody := map[string]string{
			"open_id":      openID,
			"mp_id":        mpID,
			"date_hour":    dateHour,
			"access_token": accessToken,
		}
		requestBodyJSON, err := json.Marshal(requestBody)
		if err != nil {
			http.Error(w, "Failed to encode request body", http.StatusInternalServerError)
			return
		}

		// 发送请求到抖音API
		apiURL := "https://minigame.zijieapi.com/mgplatform/api/apps/data/get_ecpm"
		resp, err := http.Post(apiURL, "application/json", bytes.NewBuffer(requestBodyJSON))
		if err != nil {
			http.Error(w, "Failed to call Douyin API", http.StatusInternalServerError)
			return
		}
		defer resp.Body.Close()

		// 读取响应内容
		responseBody, err := ioutil.ReadAll(resp.Body)
		if err != nil {
			http.Error(w, "Failed to read Douyin API response", http.StatusInternalServerError)
			return
		}

		// 将API响应返回给客户端
		w.Header().Set("Content-Type", "application/json")
		w.WriteHeader(resp.StatusCode)
		w.Write(responseBody)
	})

	// 启动HTTP服务器
	fmt.Println("Server is running on http://localhost:8080")
	err := http.ListenAndServe(":8080", nil)
	if err != nil {
		fmt.Println("Error starting server:", err)
	}
}