package main

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

/*

Timezone = UTC

*/

func main() {
	addr := readHttpYML()

	logger("----------------START----------------")
	logger("timezone = UTC")
	logger("connection open with address " + addr)

	handler()

	err := http.ListenAndServe(addr, nil)
	errorPanic(err)
}

func handler() {
	//reihenfolge ist wichtig!

	//admin pages
	logger("----------------HANDLE ADMIN LOGIN----------------")
	keys := getAdminKeys()
	if len(keys) > 0 {
		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")
		}
	}
	logger("----------------HANDLE END----------------")

	//events
	handleEvents()

	//pages
	logger("----------------HANDLE PAGES----------------")
	httpHandleFunc("", "./web/pages/home.html", "text/html")
	handleFilesInFolder("", "./web/pages/", true)
	logger("----------------HANDLE END----------------")

	//styles
	logger("----------------HANDLE STYLES----------------")
	handleFilesInFolder("style/", "./web/styles/", false)
	logger("----------------HANDLE END----------------")

	//images
	handleImages()
}

func handleEvents() {
	if getEventCount() > 0 {
		logger("----------------HANDLE EVENTS----------------")
		events := getEvents()
		for _, e := range events {
			httpHandleFunc("event/"+strconv.Itoa(e.id), "./web/pages/event.html", "text/html")
		}
		logger("----------------HANDLE END----------------")
	}
}

func handleImages() {
	logger("----------------HANDLE IMAGES----------------")
	handleFilesInFolder("image/", "./web/images/", false)
	logger("----------------HANDLE END----------------")
}

var alreadyHandledFiles []string = []string{"./web/pages/admin/dashboard.html", "./web/pages/event.html"}

func handleFilesInFolder(urlPrefix string, folderpath string, handleWithoutFileSuffix bool) {
	if folderpath[len(folderpath)-1] != '/' {
		folderpath += "/"
	}
	files, err := ioutil.ReadDir(folderpath)
	errorPanic(err)

	for _, file := range files {
		alreadyHandled := stringListContains(alreadyHandledFiles, folderpath+file.Name())

		if !alreadyHandled {
			if !file.IsDir() {
				f := strings.Split(file.Name(), ".")
				ContentType := f[len(f)-1]
				filename := ""

				if handleWithoutFileSuffix {
					for index, item := range f {
						if index < len(f)-1 {
							filename += item
						}
					}
				} else {
					filename = file.Name()
				}

				switch ContentType {
				case "png":
					httpHandleFunc(urlPrefix+filename, folderpath+file.Name(), "image/png")
				case "webp":
					httpHandleFunc(urlPrefix+filename, folderpath+file.Name(), "image/webp")
				case "svg":
					httpHandleFunc(urlPrefix+filename, folderpath+file.Name(), "image/svg+xml")
				case "jpeg":
					httpHandleFunc(urlPrefix+filename, folderpath+file.Name(), "image/jpeg")
				case "jpg":
					httpHandleFunc(urlPrefix+filename, folderpath+file.Name(), "image/jpeg")
				case "gif":
					httpHandleFunc(urlPrefix+filename, folderpath+file.Name(), "image/gif")
				case "css":
					httpHandleFunc(urlPrefix+filename, folderpath+file.Name(), "text/css")
				case "html":
					httpHandleFunc(urlPrefix+filename, folderpath+file.Name(), "text/html")
				default:
					logger("handleFilesInFolder -> content-type unknown : " + folderpath + file.Name())
				}
				alreadyHandledFiles = append(alreadyHandledFiles, folderpath+file.Name())
			} else {
				childFolder := file.Name()
				handleFilesInFolder(childFolder, folderpath+childFolder, handleWithoutFileSuffix)
			}
		} else {
			logger("handleFilesInFolder -> already handled : " + folderpath + file.Name())
		}
	}
}

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
}