package main

import (
	"regexp"
	"strings"

	"github.com/PuerkitoBio/goquery"
	"github.com/gocolly/colly"
)

func (app *App) ScrapeWhic(shop Shop) []Angebot {
	Shop_url := "https://whic.de/angebote"
	Whiskys := []Angebot{}

	c := app.customCollector([]string{"whic.de"})

	c.OnHTML("li.item", func(e *colly.HTMLElement) {

		if e.Request.URL.String() != Shop_url {
			return
		}

		W := Angebot{}

		W.Shop = shop.Id

		whisky_name := e.ChildAttr("a", "title")
		whisky_url := e.ChildAttr("a", "href")

		W.Name = whisky_name
		W.Url = whisky_url

		var err error

		e.ForEach(".price-box", func(i int, e *colly.HTMLElement) {
			e.ForEach(".old-price", func(i int, e *colly.HTMLElement) {
				W.Original_price, err = convert_price(e.ChildText(".price"))
				if err != nil {
					W.error_msg = err.Error()
					W.error_ctx = e.ChildText(".price")
					W.Println("Whic: Converting original price failed")
					return
				}
			})
			e.ForEach(".special-price", func(i int, e *colly.HTMLElement) {
				W.Discounted_price, err = convert_price(e.ChildText(".price"))
				if err != nil {
					W.error_msg = err.Error()
					W.error_ctx = e.ChildText(".price")
					W.Println("Whic: Converting discounted price failed")
					return
				}
			})
		})

		base_price_noisy := e.ChildText(".base-price")
		W.Base_price, err = sanitize_base_price(base_price_noisy)
		if err != nil {
			W.error_msg = err.Error()
			W.error_ctx = base_price_noisy
			W.Println("Whic: Sanitizing base price failed")
			return
		}

		/*
		 * colly does not parse a <noscript>, thus we are reading the content and parse it as html.
		 */
		img_link_noisy := e.ChildText(".product-image")

		doc, err := goquery.NewDocumentFromReader(strings.NewReader(img_link_noisy))
		if err != nil {
			W.error_msg = err.Error()
			W.error_ctx = img_link_noisy
			W.Println("Whic: Parsing document in Goquery failed")
			return
		}
		W.Image_url, _ = doc.Find("img").Attr("src")

		e.Request.Visit(W.Url)

		var ctx string
		W.Volume, ctx = get_volume(e)
		if W.Volume == 0 {
			W.error_msg = "Whic: Volume is zero"
			W.error_ctx = ctx
			W.Println("Whic: Volume is zero")
			return
		}
		W.Abv, ctx = get_abv(e)
		if W.Abv == 0 {
			W.error_msg = "Whic: Abv is zero"
			W.error_ctx = ctx
			W.Println("Whic: Abv is zero")
			return
		}

		spirit_type_noisy := e.Request.Ctx.Get("spirit_type")
		W.Spirit_type = detect_spirit_type(spirit_type_noisy)

		W.Website = e.Request.Ctx.Get("website")

		Whiskys = append(Whiskys, W)
	})

	c.OnHTML("#product-view-head-txt-extra-info", func(e *colly.HTMLElement) {
		text_noisy := e.Text

		r_volume, err := regexp.Compile("Volumen: ([0-9]+([.,][0-9]+)) Liter")
		if err != nil {
			Fatal(err, "Whic: Volumen regex failed")
		}
		volume := r_volume.FindStringSubmatch(text_noisy)
		if volume == nil || len(volume) < 2 {
			return
		}

		e.Request.Ctx.Put("volume", volume[1]+"l")

		r_abv, err := regexp.Compile("Alkoholgehalt: ([0-9]+([.,][0-9]+))%")
		if err != nil {
			Fatal(err, "Whic: Abv regex failed")
		}
		abv := r_abv.FindStringSubmatch(text_noisy)
		if abv == nil || len(abv) < 2 {
			return
		}

		e.Request.Ctx.Put("abv", abv[1]+"%")
		e.Request.Ctx.Put("website", string(e.Response.Body))
	})

	c.OnHTML("#product-attribute-specs-table", func(e *colly.HTMLElement) {
		e.ForEach("tr", func(i int, e *colly.HTMLElement) {
			th_str := e.ChildText("th")
			if "Produkt Kategorie" == th_str {
				e.Request.Ctx.Put("spirit_type", e.ChildText("td"))
			}
		})
	})

	err := c.Visit(Shop_url)
	if err != nil {
		shop.error_msg = err.Error()
		shop.error_ctx = Shop_url
		shop.Warn("Crawling failed")
	}

	return Whiskys
}