package main

import (
	"flag"
	"log/slog"
	"net/http"
	"os"
)

// for application wide dependencies
type application struct {
	logger *slog.Logger
}

// main it's the snippetbox webapp
func main() {
	// configuration
	addr := flag.String("addr", ":4000", "HTTP network address")
	logfmt := flag.String("logfmt", "text", "Log output format")
	loglevel := flag.String("loglevel", "INFO", "Log level: DEBUG, INFO, WARN, or ERROR")
	flag.Parse()

	var logger *slog.Logger
	var handler_options slog.HandlerOptions

	switch *loglevel {
        case "DEBUG": handler_options = slog.HandlerOptions{Level: slog.LevelDebug}
	case "INFO": handler_options = slog.HandlerOptions{Level: slog.LevelInfo}
	case "WARN": handler_options = slog.HandlerOptions{Level: slog.LevelWarn}
	case "ERROR": handler_options = slog.HandlerOptions{Level: slog.LevelError}
	}

	switch *logfmt {
	case "json": logger = slog.New(slog.NewJSONHandler(os.Stdout, &handler_options))
	default: logger = slog.New(slog.NewTextHandler(os.Stdout, &handler_options))
	}

	app := &application{
		logger: logger,
	}

	mux := http.NewServeMux()

	// setup server for static files
	fileServer := http.FileServer(http.Dir("./ui/static"))
	mux.Handle("/static/", http.StripPrefix("/static", fileServer))

	mux.HandleFunc("/", app.home)
	mux.HandleFunc("/snippet/view", app.snippetView)
	mux.HandleFunc("/snippet/create", app.snippetCreate)

	logger.Info("starting server", slog.String("addr", *addr))
	err := http.ListenAndServe(*addr, mux)
	logger.Error(err.Error())
	os.Exit(1)
}