package main

import (
	"fmt"

	tpl "lamium/template"
)

var (
	// App information.
	app = struct {
		name       string
		cmd        string
		desc       string
		version    string
		configPath string
	}{
		name:       "Lamium",
		cmd:        "lm",
		desc:       "Static web album generator",
		version:    "0.1.0",
		configPath: "lamium.json",
	}

	// Command line menu options.
	helpOpts = [][]string{
		{"Usage: " + app.cmd + " [option]\n"},
		{"Options:"},
		{"-h", "help", "Show this help message"},
		{"-m", "make", "Make album in the configured directory"},
		{"-n", "new", "Place a new config in the current directory"},
		{"-v", "version", "Show app version"},
	}
)

// Prints a help message to standard output.
func showHelp() {
	for i := range helpOpts {
		if len(helpOpts[i]) >= 3 {
			fmt.Println(helpOpts[i][0]+", "+helpOpts[i][1], "\t\t"+
				helpOpts[i][2])
		} else {
			fmt.Println(helpOpts[i][0])
		}
	}
}

// Prints version information.
func showVersion() {
	fmt.Println(app.name, app.version, "—", app.desc)
}

// Maps command line options to corresponding functions.
func parseArgs(args []string) {
	if len(args) > 1 {
		switch args[1] {
		case "-h", "h", "help":
			showHelp()
		case "-m", "m", "make":
			conf := loadConfig(app.configPath)
			index := map[string]string{
				"html":  conf.IndexHTML,
				"type":  conf.IndexType,
				"title": conf.IndexTitle,
			}
			tpl.MakeAlbum(conf.ThemeDir, conf.HTMLDir, index, conf.Sets)
		case "-n", "n", "new":
			genConfig(app.configPath)
			tpl.GenTheme(false)
		case "-v", "v", "version":
			showVersion()
		}
	} else {
		showHelp()
	}
}