package main

import (
	"fmt"
	"html/template"
	"log"
	"net/http"
	"nethack-high-scores/pkg/logparser"
	"os"
)

type siteData struct {
	ServerName string
	Records    []logparser.Record
}

func main() {
	HTTP_PORT := 8080

	if len(os.Args) != 2 {
		fmt.Printf("USAGE: %v NETHACK_LOG_FILE\n", os.Args[0])
		os.Exit(1)
	}

	logFile := os.Args[1]
	if _, err := os.Open(logFile); err != nil {
		panic(err)
	}

	http.HandleFunc("/", servePage)

	log.Printf("Listening on :%v...", HTTP_PORT)
	addr := fmt.Sprintf(":%v", HTTP_PORT)
	log.Fatal(http.ListenAndServe(addr, nil))
}

func servePage(w http.ResponseWriter, r *http.Request) {
	log.Printf(
		"%s %s %s %s",
		r.RemoteAddr, r.Method, r.URL, r.Header["User-Agent"],
	)

	// Error already handled in main()
	f, _ := os.Open(os.Args[1])

	records, errs := logparser.ParseLog(f)
	if len(errs) > 0 {
		panic(errs)
	}

	records = logparser.TopX(records, 10)
	tmpl := template.New("index.gohtml")
	tmpl = tmpl.Funcs(template.FuncMap{
		"add": func(i int, x int) int {
			return i + x
		},
	})
	tmpl, err := tmpl.ParseFiles("./templates/index.gohtml")
	if err != nil {
		log.Fatal(err)
	}

	log.Printf("%#v", tmpl)
	data := siteData{
		ServerName: "nethack.jerryaldrichiii.com",
		Records:    records,
	}
	err = tmpl.Execute(w, data)
	if err != nil {
		log.Fatal(err)
	}
}