package main

import (
	"strconv"
	"strings"
)

func htmlElement(tag string, innerHTML string, args string) string {
	return "<" + tag + " " + args + ">" + innerHTML + "</" + tag + ">"
}

func htmlLinkElement(innerHTML string, destination string, blank bool, args string) string {
	b := ""
	if blank {
		b = "target=\"_blank\" "
	}

	return htmlElement("a", innerHTML, " href=\""+destination+"\" "+b+args)
}

func htmlInputElement(name string, _type string, value string, args string) string {
	return "<input name=\"" + name + "\" type=\"" + _type + "\" value=\"" + value + "\" " + args + ">"
}

func htmlNav(pages [][]string, activePage string) string {
	output := ""

	for _, page := range pages {
		if page[1] == "/"+activePage || (page[1] == "/home" && activePage == "") {
			output += htmlElement("li", htmlLinkElement(page[0], page[1], false, "class=\"active\""), "")
		} else {
			output += htmlElement("li", htmlLinkElement(page[0], page[1], false, ""), "")
		}
	}

	return htmlElement("nav", htmlElement("ul", output, ""), "")
}

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/"))

	if strings.Contains(activePage, "/addEvent") {
		output = strings.ReplaceAll(output, "!ADMINKEY", activePage)
	} else {
		output = strings.ReplaceAll(output, "!ADMINKEY", activePage+"/addEvent")
	}

	return output
}