package main

import (
	"io"
	"net/http"
	"strconv"
	"strings"
	"time"
)

func handler() {
	//Pages
	httpHandleFunc("", "./web/pages/home.html", "text/html")
	httpHandleFunc("home", "./web/pages/home.html", "text/html")
	httpHandleFunc("treff", "./web/pages/treff.html", "text/html")
	httpHandleFunc("events", "./web/pages/events.html", "text/html")
	httpHandleFunc("about", "./web/pages/about.html", "text/html")

	httpHandleFunc("kontakt", "./web/pages/kontakt.html", "text/html")
	httpHandleFunc("kontakt/adresse", "./web/pages/kontakt/adresse.html", "text/html")
	httpHandleFunc("kontakt/irc", "./web/pages/kontakt/irc.html", "text/html")
	httpHandleFunc("kontakt/mail", "./web/pages/kontakt/mail.html", "text/html")
	httpHandleFunc("kontakt/tel", "./web/pages/kontakt/tel.html", "text/html")

	httpHandleFunc("verein", "./web/pages/verein.html", "text/html")
	httpHandleFunc("support", "./web/pages/support.html", "text/html")

	httpHandleFunc("impressum", "./web/pages/impressum.html", "text/html")
	httpHandleFunc("datenschutz", "./web/pages/datenschutz.html", "text/html")

	//Styles
	httpHandleFunc("style/main.css", "./web/styles/main.css", "text/css")
	httpHandleFunc("style/kontakt.css", "./web/styles/kontakt.css", "text/css")
	httpHandleFunc("style/home.css", "./web/styles/home.css", "text/css")
	httpHandleFunc("style/events.css", "./web/styles/events.css", "text/css")

	//Images
	httpHandleFunc("image/logo_ctdo.svg", "./web/images/logo_ctdo.svg", "image/svg+xml")
	httpHandleFunc("image/header.jpg", "./web/images/header.jpg", "image/jpeg")
	httpHandleFunc("image/adresse_knopf.webp", "./web/images/adresse_knopf.webp", "image/webp")
	httpHandleFunc("image/chat_knopf.webp", "./web/images/chat_knopf.webp", "image/webp")
	httpHandleFunc("image/mail_knopf.webp", "./web/images/mail_knopf.webp", "image/webp")
	httpHandleFunc("image/tel_knopf.webp", "./web/images/tel_knopf.webp", "image/webp")
}

func getPages() [][]string {
	output := [][]string{}

	output = append(output, []string{"home", "/home"})
	output = append(output, []string{"zeiten & location", "/treff"})
	output = append(output, []string{"events", "/events"})
	output = append(output, []string{"über uns", "/about"})
	output = append(output, []string{"kontakt", "/kontakt"})
	output = append(output, []string{"verein", "/verein"})
	output = append(output, []string{"unterstützung", "/support"})

	return output
}

func getFooterPages() [][]string {
	output := [][]string{}

	output = append(output, []string{"impressum", "/impressum"})
	output = append(output, []string{"datenschutzerklärung", "/datenschutz"})

	return output
}

func getRoomState() status {
	c := &http.Client{Timeout: 10 * time.Second}
	r, err := c.Get("https://status.ctdo.de/api/simple/v2")
	if err != nil {
		panic(err.Error())
	}
	defer r.Body.Close()

	body, _err := io.ReadAll(r.Body)
	if _err != nil {
		panic(_err.Error())
	}

	bodyString := string(body)

	temp := []string{}

	bodyString = strings.ReplaceAll(bodyString, "{", "")
	bodyString = strings.ReplaceAll(bodyString, "}", "")

	_temp := strings.Split(bodyString, ",")

	for _, element := range _temp {
		__temp := strings.Split(element, ":")
		temp = append(temp, __temp[1])
	}

	roomState := new(status)

	roomState.state = temp[0] == "true"
	var __err error
	roomState.power, __err = strconv.ParseInt(temp[2], 0, 64)
	if __err != nil {
		panic(__err.Error())
	}

	return *roomState
}

func htmlNewBanner(text string, link string) string {
	output := ""

	output += htmlElement("div", htmlLinkElement(text, link, true, ""), "class=\"newBanner\"")

	return output
}

func htmlReplacer(input string, activePage string) string {
	output := strings.ReplaceAll(input, "!NAV", htmlNav(getPages(), activePage))

	if getRoomState().state {
		output = strings.ReplaceAll(output, "!RAUMSTATUS", "<p>Raumstatus: <b class=\"green-text\">offen</b></p>")
	} else {
		output = strings.ReplaceAll(output, "!RAUMSTATUS", "<p>Raumstatus: <b class=\"red-text\">geschlossen</b></p>")
	}

	output = strings.ReplaceAll(output, "!FOOTERNAV", htmlNav(getFooterPages(), activePage))

	if getNextTopic().days == 0 {
		output = strings.ReplaceAll(output, "!TOPICTREFF", htmlElement("h3", "Nächster Topictreff findet Heute statt!", ""))
	} else if getNextTopic().days == 1 {
		output = strings.ReplaceAll(output, "!TOPICTREFF", htmlElement("h3", "Nächster Topictreff findet Morgen statt!", "class=\"topic\"")+htmlElement("p", "Am "+getNextTopic().date, "class=\"topic\""))
	} else if getNextTopic().days < 10 {
		output = strings.ReplaceAll(output, "!TOPICTREFF", htmlElement("h3", "Nächster Topictreff findet in "+strconv.FormatInt(int64(getNextTopic().days), 10)+" Tagen statt!", "class=\"topic\"")+htmlElement("p", "Am "+getNextTopic().date, "class=\"topic\""))
	} else {
		output = strings.ReplaceAll(output, "!TOPICTREFF", htmlElement("h3", "Nächster Topictreff findet in "+string(getNextTopic().days)+" Tagen statt!", "class=\"topic\"")+htmlElement("p", "Am "+getNextTopic().date, "class=\"topic\""))
	}

	events := getEvents()

	if len(events) == 0 {
		output = strings.ReplaceAll(output, "!EVENTS", htmlNewBanner("Rundgang", "https://www.chaostreff-dortmund.de/rundgang/"))
	} else {

		output = strings.ReplaceAll(output, "!EVENTS", htmlNewBanner("Rundgang", "https://www.chaostreff-dortmund.de/rundgang/"))
	}

	output = strings.ReplaceAll(output, "!NEWBANNER", htmlNewBanner("Rundgang", "https://www.chaostreff-dortmund.de/rundgang/"))

	return output
}

func ifFloatRange(variable float64, min float64, max float64, includeMin bool, includeMax bool) bool {
	a, b := false, false

	if includeMin {
		a = variable >= min
	} else {
		a = variable > min
	}

	if includeMax {
		b = variable <= max
	} else {
		b = variable < max
	}

	return a && b
}

func stringSplit(input string, sep string) []string {
	output := *new([]string)
	for _, element := range strings.Split(input, sep) {
		if element != "" {
			output = append(output, element)
		}
	}
	return output
}

// jeden ersten donnerstag und dritten dienstag
func getNextTopic() topic {
	date := time.Now()

	var output topic

	for i := 0; i < 31; i++ {
		newDate := stringSplit(date.AddDate(0, 0, 1*i).Format(time.UnixDate), " ")

		if newDate[0] == "Thu" || newDate[0] == "Tue" {
			dayA, errA := strconv.Atoi(newDate[2])
			if errA != nil {
				panic(errA.Error())
			}

			dayB, errB := strconv.Atoi(newDate[2])
			if errB != nil {
				panic(errB.Error())
			}

			if ifFloatRange(float64(dayA)/7, 0, 1, false, true) || (ifFloatRange(float64(dayB)/7, 2, 3, false, true) && newDate[0] == "Tue") {
				output.date = date.AddDate(0, 0, 1*i).Format("02.01.2006")
				output.days = i
				break
			}
		}
	}

	return output
}