package main

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

func logger(input string) {
	println("[" + time.Now().Format("15:04:05 CET") + "] " + input)
	fileAddLine("["+time.Now().Format("15:04:05 CET")+"] "+input, "./log/"+time.Now().Format("2006-02-01 CET")+".log")
}

func handler() {
	logger("Pages:")

	//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")

	//contact pages
	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")

	//pages
	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")

	//admin pages
	keys := getAdminKeys()

	//this check is necessary!
	if keys != nil {
		for _, key := range keys {
			httpHandleFunc("admin/"+key, "./web/pages/admin/dashboard.html", "text/html")
			httpHandleFuncWithPOST("admin/"+key+"/addEvent", "./web/pages/admin/dashboard.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()

	var body []byte
	body, err = io.ReadAll(r.Body)
	errorPanic(err)

	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"
	roomState.power, err = strconv.ParseInt(temp[2], 0, 64)
	errorPanic(err)

	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", htmlElement("h4", "Keine Events in der nächsten Zeit.", ""))
		output = strings.ReplaceAll(output, "!NEXTEVENTS", htmlElement("h4", "Keine Events in der nächsten Zeit.", ""))
	} else {
		tempA, tempB := "", ""
		for i, Event := range events {
			if i == 24 {
				break
			}

			tempA = htmlElement("h2", Event.title, "")
			tempA += htmlElement("p", Event.description, "")
			tempA += htmlElement("p", Event.date, "")
			tempB += htmlElement("div", tempA, "class=\"event\"")
		}
		output = strings.ReplaceAll(output, "!EVENTS", htmlElement("div", tempB, "class=\"eventList\""))
		output = strings.ReplaceAll(output, "!NEXTEVENTS", htmlElement("div", string(tempB[0]+tempB[1]+tempB[2]+tempB[3]), "class=\"eventList\""))
	}

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

	output = strings.ReplaceAll(output, "!ADMINKEY", activePage)

	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("Mon Jan _2 15:04:05 CET 2006"), " ")

		if newDate[0] == "Thu" || newDate[0] == "Tue" {
			dayA, errA := strconv.Atoi(newDate[2])
			errorPanic(errA)

			dayB, errB := strconv.Atoi(newDate[2])
			errorPanic(errB)

			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 CET")
				output.days = i
				break
			}
		}
	}

	return output
}

func readDatabaseYML() database {
	file := fileRead("./config/database.yml")

	rows := [][]string{}

	for _, row := range strings.Split(file, "\n") {
		rows = append(rows, strings.Split(row, ": "))
	}

	output := new(database)

	for i, row := range rows {
		switch i {
		case 0:
			output.username = row[1]
		case 1:
			output.password = row[1]
		case 2:
			output.address = row[1]
		case 3:
			output.port = row[1]
		case 4:
			output.database = row[1]
		default:
			logger("func.go:259 -> switch-case is out of range")
		}
	}

	return *output
}

func readHttpYML() string {
	file := fileRead("./config/http.yml")

	rows := [][]string{}

	for _, row := range strings.Split(file, "\n") {
		rows = append(rows, strings.Split(row, ": "))
	}

	for i, row := range rows {
		switch i {
		case 0:
			return row[1]
		default:
			logger("func.go:280 -> switch-case is out of range")
		}
	}

	return ""
}

/*
	func generateRandomString(length int) string {
		chars := "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
		chars += strings.ToLower(chars)

		output := ""

		for i := 0; i < length; i++ {
			output += string(chars[rand.Intn(len(chars)-1)])
		}

		return output
	}
*/

func errorPanic(err error) {
	if err != nil {
		logger(err.Error())
		panic("----------------ERROR----------------")
	}
}