package main

import (
	"flag"
	"fmt"
	"os"
)

// Flags supplied to the cli.
type Flags struct {
	ConfigPath string
	Discover   bool
	Verbose    bool
}

// ParseFlags parses the supplied command-line flags.
func (a *App) ParseFlags() {
	app.flags = new(Flags)
	flag.Usage = func() {
		fmt.Printf(serviceName + ": " + serviceDescription + ".\n\nUsage:\n")
		flag.PrintDefaults()
	}

	// Print the version and exit when requested.
	var printVersion bool
	flag.BoolVar(&printVersion, "v", false, "Print version")

	// Override the configuration path.
	usage := "Load configuration from `FILE`"
	flag.StringVar(&app.flags.ConfigPath, "config", "", usage)
	flag.StringVar(&app.flags.ConfigPath, "c", "", usage+" (shorthand)")

	// Query each configured device for its integration IDs and exit.
	usage = "Connect to each device, print its integration IDs, and exit"
	flag.BoolVar(&app.flags.Discover, "discover", false, usage)
	flag.BoolVar(&app.flags.Discover, "d", false, usage+" (shorthand)")

	// Force debug-level logging to the console, overriding the configured log level.
	usage = "Force debug-level logging to the console, overriding the config"
	flag.BoolVar(&app.flags.Verbose, "verbose", false, usage)
	flag.BoolVar(&app.flags.Verbose, "V", false, usage+" (shorthand)")

	flag.Parse()

	if printVersion {
		fmt.Println(serviceName + ": " + serviceVersion)
		os.Exit(0)
	}
}