// Package fenwei
// @Author gmy 2024/8/20 14:47:00
package fenwei

import (
	"bytes"
	"context"
	"encoding/json"
	"eta/eta_data_analysis/models"
	"eta/eta_data_analysis/utils"
	"fmt"
	"github.com/chromedp/cdproto/network"
	"github.com/chromedp/chromedp"
	"io"
	"io/ioutil"
	"log"
	"net/http"
	"strings"
	"sync"
	"time"
)

type DataProcessor interface {
	FetchAndProcess(DataProcessor) error
	GenerateRequestParams(currentTime string) map[string]string
	ProcessResponse(data string) ([]models.FenWeiNetIndexInfo, error)
}

type BaseProcessor struct {
	URL string
}

var (
	authorization string
	authLock      sync.RWMutex
)

func (p *BaseProcessor) FetchAndProcess(processor DataProcessor) error {

	// 获取当前时间 yyyy-MM-dd
	now := time.Now()
	currentTime := now.Format(utils.FormatDateUnSpace)

	// 请求参数
	params := processor.GenerateRequestParams(currentTime)
	// 保存请求参数
	originalRequestBody := params["params"] // 保存原始请求数据

	requestBody := bytes.NewBufferString(originalRequestBody)
	req, err := http.NewRequest("POST", p.URL, requestBody)
	if err != nil {
		return err
	}

	// 设置请求头
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("accept-language", "zh-CN,zh;q=0.9")

	authLock.RLock()
	req.Header.Set("Authorization", authorization)
	authLock.RUnlock()

	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		return err
	}
	defer resp.Body.Close()

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return err
	}
	if checkResp(string(body)) {
		authLock.Lock()

		// 登录获取Authorization
		authorization, err = getAuthorizationByChrome()
		if err != nil {
			authLock.Unlock()
			return err
		}
		authLock.Unlock()

		// 重新创建请求对象
		requestBody = bytes.NewBufferString(originalRequestBody)
		req, err = http.NewRequest("POST", p.URL, requestBody)
		if err != nil {
			return err
		}

		// 重新设置请求头
		req.Header.Set("Content-Type", "application/json")
		req.Header.Set("accept-language", "zh-CN,zh;q=0.9")
		req.Header.Set("Authorization", authorization)

		// 重新请求
		resp, err = client.Do(req)
		if err != nil {
			return err
		}
		defer resp.Body.Close()

		body, err = io.ReadAll(resp.Body)
		if err != nil {
			return err
		}
	}

	// 数据处理
	response, err := processor.ProcessResponse(string(body))
	if err != nil {
		return err
	}
	log.Printf("response size: %v", len(response))
	utils.FileLog.Info(fmt.Sprintf("response: %v", response))

	// 请求lib应用入库
	paramsLib := make(map[string]interface{})
	paramsLib["List"] = response
	paramsLib["TerminalCode"] = utils.TerminalCode
	postEdbLib, err := postEdbLib(paramsLib, utils.LIB_ROUTE_FENWEI_NET_DATA_HANDLE)
	if err != nil {
		// 有错误就不继续执行
		log.Printf("postEdbLib err: %v", err)
		return err
	}
	log.Printf("postEdbLib size: %v", len(postEdbLib))
	utils.FileLog.Info(fmt.Sprintf("postEdbLib: %v", string(postEdbLib)))
	return nil
}

// PostEdbLib 调用指标接口
func postEdbLib(param map[string]interface{}, method string) (result []byte, err error) {
	postUrl := utils.EDB_LIB_URL + method
	postData, err := json.Marshal(param)
	if err != nil {
		return
	}
	result, err = httpPost(postUrl, string(postData), "application/json")
	if err != nil {
		return
	}
	return
}

func httpPost(url, postData string, params ...string) ([]byte, error) {
	fmt.Println("HttpPost Url:" + url)
	body := ioutil.NopCloser(strings.NewReader(postData))
	client := &http.Client{}
	req, err := http.NewRequest("POST", url, body)
	if err != nil {
		return nil, err
	}
	contentType := "application/x-www-form-urlencoded;charset=utf-8"
	if len(params) > 0 && params[0] != "" {
		contentType = params[0]
	}
	req.Header.Set("Content-Type", contentType)
	req.Header.Set("authorization", utils.MD5(utils.APP_EDB_LIB_NAME_EN+utils.EDB_LIB_Md5_KEY))
	resp, err := client.Do(req)
	if err != nil {
		fmt.Println("client.Do err:" + err.Error())
		return nil, err
	}
	defer resp.Body.Close()
	b, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Println("HttpPost:" + string(b))
	}
	return b, err
}

// resp响应参数检测 code or message 判断是否需要重新登录
func checkResp(resp string) bool {
	if resp == "" {
		return true
	}
	var responseObj models.Response
	err := json.Unmarshal([]byte(resp), &responseObj)
	if err != nil {
		return false
	}
	if responseObj.Code != 200 || responseObj.Message != "成功!" {
		return true
	}

	return false
}

// GenerateRequestParams 让子类来实现这个方法
func (p *BaseProcessor) GenerateRequestParams(currentTime string) map[string]string {
	return map[string]string{}
}

func (p *BaseProcessor) ProcessResponse(data string) ([]models.FenWeiNetIndexInfo, error) {

	return nil, nil
}

// GetAuthorizationByChrome 获取Authorization
func getAuthorizationByChrome() (authorization string, err error) {
	// 检查账号和密码是否设置
	if utils.FenweiNetUseName == "" {
		return "", fmt.Errorf("汾渭账号未设置")
	}
	if utils.FenweiNetPassword == "" {
		return "", fmt.Errorf("汾渭密码未设置")
	}

	opts := append(
		chromedp.DefaultExecAllocatorOptions[:],
		chromedp.Flag("headless", false),
	)
	allocCtx, cancel1 := chromedp.NewExecAllocator(context.Background(), opts...)
	defer cancel1()

	// 创建chrome实例
	ctx, cancel2 := chromedp.NewContext(
		allocCtx,
		chromedp.WithLogf(log.Printf),
	)
	defer cancel2()

	// 提前设置监听器
	authorizationChan := make(chan string, 1) // 使用channel来确保监听到的Authorization可以安全传递
	chromedp.ListenTarget(ctx, func(ev interface{}) {
		if ev, ok := ev.(*network.EventRequestWillBeSent); ok {
			if authHeader, found := ev.Request.Headers["Authorization"]; found {
				if authStr, ok := authHeader.(string); ok {
					select {
					case authorizationChan <- authStr: // 将Authorization放入channel
					default:
					}
					utils.FileLog.Info("Authorization header found: " + authStr)
				}
			}
		}
	})

	// 运行浏览器操作
	err = chromedp.Run(ctx,
		chromedp.Navigate(`https://www.sxcoal.com/`),
		chromedp.Click(`.pc_content__jO_mq`, chromedp.ByQuery),
		chromedp.Sleep(2*time.Second),

		chromedp.SetValue(`div.Sign_username__7eYwE input[type="text"]`, utils.FenweiNetUseName, chromedp.ByQuery),
		chromedp.SetValue(`div.Sign_password__dwxMn input[type="password"]`, utils.FenweiNetPassword, chromedp.ByQuery),
		chromedp.Sleep(2*time.Second),

		// 定位并点击指定按钮（class属性为 'Button_btn__xbZjp Button_black__X_jwF Button_mediu__ZVHO_'，并且 span 标签内容为 '登录'）
		chromedp.Click(`//button[contains(@class, 'Button_btn__xbZjp') and contains(@class, 'Button_black__X_jwF') and contains(@class, 'Button_mediu__ZVHO_')]/span[text()='登录']`, chromedp.BySearch),

		// 添加延迟，确保捕获到请求头
		chromedp.Sleep(8*time.Second),
	)

	// 从channel中获取authorization
	select {
	case authorization = <-authorizationChan:
	case <-time.After(10 * time.Second): // 超时时间，可以根据实际情况调整
		err = fmt.Errorf("未能获取到Authorization")
	}

	return
}