package main

import (
	"database/sql"
	"encoding/json"
	"intimate"
	"log"
	"regexp"
	"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.Quit()
	ps := intimate.NewPerfectShutdown()
	counter := intimate.NewCounter()
	counter.SetMaxLimit(100)
	counter.SetMaxToDo(func(olist ...interface{}) error {
		owd := olist[0].(*selenium.WebDriver)
		(*owd).Quit()
		*owd = intimate.GetChromeDriver(3030)
		return nil
	}, &wd)

	for !ps.IsClose() {

		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 {
			log.Println(err)
			sstore.UpdateError(sourceChannel, err)
			time.Sleep(time.Second * 10)
			continue
		}

		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 && !ps.IsClose(); i++ {
			elements, err = wd.FindElements(selenium.ByXPATH, "(//div/p[@class=''])[last()]")
			if err != nil {
				log.Println(err)
				break
			}
			time.Sleep(time.Millisecond * 200)
			wd.KeyDown(selenium.EndKey)
			time.Sleep(time.Millisecond * 200)
			wd.KeyUp(selenium.EndKey)
			time.Sleep(time.Millisecond * 2000)
			if len(elements) == liveurls {
				delayerror--
				if delayerror <= 0 {
					break
				}
			} else {
				delayerror = 2
			}
			liveurls = len(elements)
		}
		articles, err := wd.FindElements(selenium.ByXPATH, "//article")
		if err != nil {
			log.Println(err)
			continue
		}

		for _, article := range articles {

			e, err := article.FindElement(selenium.ByXPATH, ".//a[@data-a-target='preview-card-title-link' and @href]")
			if err != nil {
				log.Println(err)
				continue
			}

			href, err := e.GetAttribute("href")
			if err != nil {
				log.Println(err)
				continue
			}

			btns, err := article.FindElements(selenium.ByXPATH, ".//div[@class='tw-full-width tw-inline-block']//button")
			if err != nil {
				log.Println(err)
				continue
			}

			var tags []string
			for _, btn := range btns {
				tag, err := btn.GetAttribute("data-a-target")
				if err == nil {
					tags = append(tags, tag)
				}
			}

			streamer := &intimate.Streamer{}

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

			jtags, err := json.Marshal(tags)
			if err != nil {
				log.Println(err)
			} else {
				streamer.Tags = jtags
			}

			streamer.Platform = intimate.Ptwitch

			updateUrl := make(map[string]string)
			updateUrl["live"] = href
			streamer.LiveUrl = sql.NullString{String: href, Valid: true}
			data, err := json.Marshal(updateUrl)
			if err != nil {
				log.Println(err)
				continue
			}
			streamer.UpdateUrl = data
			streamer.Operator = 0
			if estore.InsertStreamer(streamer) {
				// log.Println("streamer update tags", streamer.Uid, tags)
				estore.Update(streamer, "Tags", streamer.Tags)
			}
		}
		log.Println("streamer find", len(articles))
		if len(articles) == 0 {
			sourceChannel.Operator = 5
			sstore.UpdateOperator(sourceChannel)
		}
		counter.AddWithReset(1)
	}

	wd.Close()
	wd.Quit()
}