package main

import (
	"embed"
	"html/template"
	"log"
	"net/http"
	"time"
)

//go:embed index.html
var indexTemplate string

type TemplateQuay struct {
	Name       string
	Town       string
	Departures []Departure
}

type TemplateContext struct {
	Quays []TemplateQuay
}

func formatTime(t time.Time) string {
	return t.Format("15:04")
}

var tplFunctions = template.FuncMap{"formatTime": formatTime}

func serveHttp() {
	http.HandleFunc("/", handleIndex)

	log.Println("Serving on port 4444")

	err := http.ListenAndServe(":4444", nil)
	if err != nil {
		log.Fatal(err)
	}
}

func handleIndex(w http.ResponseWriter, r *http.Request) {
	var ctxt = TemplateContext{}

	for _, quay := range Quays {
		departures, err := getDepartures(quay)
		if err != nil {
			log.Printf("Error retrieving departures for quay '%s'", quay.ID)
			continue
		}

		ctxt.Quays = append(ctxt.Quays, TemplateQuay{quay.Name, quay.Town, departures})
	}

	tpl := template.New("index.html").Funcs(tplFunctions)
	tpl, _ = tpl.Parse(indexTemplate)

	_ = tpl.Execute(w, ctxt)
}