package main

import (
	"database/sql"
	"intimate"
	"log"
	"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

// Execute 执行任务
func Execute() {
	var err error
	wd := intimate.GetChromeDriver(3030)
	ps := intimate.NewPerfectShutdown()

	weburl := "https://www.twitch.tv/directory?sort=VIEWER_COUNT"
	err = wd.Get(weburl)
	if err != nil {
		panic(err)
	}

	cardCondition := func(wd selenium.WebDriver) (bool, error) {
		elements, err := wd.FindElements(selenium.ByXPATH, "//span/a[contains(@data-a-target,'card-') and @href]")
		if err != nil {
			return false, err
		}
		return len(elements) > 0, nil
	}
	wd.WaitWithTimeout(cardCondition, time.Second*15)
	time.Sleep(time.Second)

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

	var hrefs map[string]bool = make(map[string]bool)
	var delayerror = 5
	for i := 0; i <= 200; i++ {
		cards, err := wd.FindElements(selenium.ByXPATH, "//span/a[contains(@data-a-target,'card-') and @href]")
		if err != nil {
			log.Println(err)
			break
		}

		if len(hrefs) == 0 {
			delayerror--
			if delayerror <= 0 {
				break
			}
		} else {
			delayerror = 5
		}

		for ii := 0; ii < 10; ii++ {
			for _, card := range cards {
				href, err := card.GetAttribute("href")
				if err != nil {
					log.Println(href, err)
					continue
				} else {
					hrefs[href] = true
				}
			}
			break
		}

		if ps.IsClose() {
			break
		}

		if len(cards) > 10 {
			log.Println(len(cards))
			wd.ExecuteScript(`items = document.evaluate("//div[@data-target='directory-page__card-container']/../self::div[@data-target and @style]", document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null); 
		for (var i = 0; i < items.snapshotLength - 10; i++) { item = items.snapshotItem(i); item.remove() ;};`, nil)
		}
		time.Sleep(time.Millisecond * 200)
		wd.KeyDown(selenium.EndKey)
		time.Sleep(time.Millisecond * 200)
		wd.KeyUp(selenium.EndKey)
		time.Sleep(time.Millisecond * 2500)
	}

	for href := range hrefs {

		// TODO: Save href
		source := &intimate.Source{}
		source.Source = sql.NullString{String: href, Valid: true}
		source.Operator = 0
		source.Target = intimate.TTwitchChannel
		source.Url = weburl
		sstore.Insert(source)
	}

	log.Println("hrefs len:", len(hrefs))
	sstore.Deduplicate(intimate.TTwitchChannel, "source")
}