package main

import (
	"database/sql"
	"encoding/json"
	"intimate"
	"log"
	"os"
	"os/signal"
	"regexp"
	"sync/atomic"
	"syscall"
	"time"

	"github.com/tebeka/selenium"
)

// sstore  源存储实例, 为存储源数据的实现. 表格具体参考sql/intimate_source.sql
var sstore *intimate.StoreSource = intimate.NewStoreSource(string(intimate.STTwitch))

// estore 解析存储连接实例
var estore *intimate.StoreExtractor = intimate.NewStoreExtractor()

// 获取类型的所有频道链接

// UserList 频道链接
type UserList struct {
}

// Execute 执行任务
func (cl *UserList) Execute() {
	// DELETE FROM source_twitch WHERE uid NOT IN (SELECT MAX(s.uid) FROM (SELECT uid, source FROM source_twitch ) s GROUP BY s.source) ;
	//article//a[@data-a-target='preview-card-title-link']

	wd := intimate.GetChromeDriver(3030)
	defer wd.Close()

	var loop int32 = 1
	var count = 0

	go func() {
		signalchan := make(chan os.Signal)
		signal.Notify(signalchan, syscall.SIGKILL, syscall.SIGQUIT, syscall.SIGTERM, syscall.SIGSTOP)
		log.Println("accept stop command:", <-signalchan)
		atomic.StoreInt32(&loop, 0)
	}()

	for atomic.LoadInt32(&loop) > 0 {

		var err error
		sourceChannel, err := sstore.Pop(intimate.TTwitchChannel)
		if err != nil {
			panic(err)
		}

		weburl := sourceChannel.Source.String + "?sort=VIEWER_COUNT"
		err = wd.Get(weburl)
		if err != nil {
			panic(err)
		}

		wd.WaitWithTimeout(func(wd selenium.WebDriver) (bool, error) {
			_, err := wd.FindElement(selenium.ByXPATH, "(//div/p[@class=''])[last()]")
			if err != nil {
				return false, err
			}
			return true, nil
		}, time.Second*10)

		btn, err := wd.FindElement(selenium.ByXPATH, "//button[@data-a-target='browse-sort-menu']")
		if err != nil {
			log.Println(err)
			continue
		}
		btn.Click()

		var elements []selenium.WebElement
		var liveurls = 0
		var delayerror = 2
		for i := 0; i < 200 && atomic.LoadInt32(&loop) > 0; i++ {
			elements, err = wd.FindElements(selenium.ByXPATH, "(//div/p[@class=''])[last()]")
			if err != nil {
				log.Println(err)
				break
			}
			time.Sleep(time.Millisecond * 500)
			wd.KeyDown(selenium.EndKey)
			wd.KeyUp(selenium.EndKey)
			time.Sleep(time.Millisecond * 1500)
			if len(elements) == liveurls {
				delayerror--
				if delayerror <= 0 {
					break
				}
			} else {
				delayerror = 2
			}
			liveurls = len(elements)
		}
		elements, err = wd.FindElements(selenium.ByXPATH, "//article//a[@data-a-target='preview-card-title-link' and @href]")
		if err != nil {
			log.Println(err)
			continue
		}

		for _, e := range elements {

			attr, err := e.GetAttribute("href")
			if err != nil {
				log.Println(err)
				continue
			}
			streamer := &intimate.Streamer{}

			matches := regexp.MustCompile(`https://www.twitch.tv/(\w+)`).FindStringSubmatch(attr)
			if len(matches) == 2 {
				streamer.UserId = matches[1]
			} else {
				log.Println(attr)
				continue
			}

			streamer.Platform = intimate.Ptwitch

			updateUrl := make(map[string]string)
			updateUrl["live"] = attr
			streamer.LiveUrl = sql.NullString{String: attr, Valid: true}
			data, err := json.Marshal(updateUrl)
			if err != nil {
				log.Println(err)
				continue
			}
			streamer.UpdateUrl = data
			streamer.Operator = 0

			estore.InsertStreamer(streamer)
		}
		log.Println("streamer insert", len(elements))
		count++
		if count >= 100 {
			wd.Close()
			wd = intimate.GetChromeDriver(3030)
			count = 0
		}
	}
}