package main

import (
	"errors"
	"fmt"
	"os"
	"strings"

	"sectorinf.com/emilis/hlctl/cmdlets"
	"sectorinf.com/emilis/hlctl/cmdlets/group"
	initcmd "sectorinf.com/emilis/hlctl/cmdlets/init"
	"sectorinf.com/emilis/hlctl/cmdlets/notify"
	"sectorinf.com/emilis/hlctl/cmdlets/save"
	"sectorinf.com/emilis/hlctl/ctllog"
)

var log = ctllog.Logger{}.New("hlctl", ctllog.Green)

var cmds = []cmdlets.Commandlet{
	initcmd.Command,
	group.Command,
	notify.Command,
	save.Command,
}

var (
	ErrNotFound = errors.New("not found")
)

func getCmdlet(name string) (cmdlets.Commandlet, error) {
	for _, c := range cmds {
		if c.Name() == name {
			return c, nil
		}
	}
	return nil, fmt.Errorf("%s: %w", name, ErrNotFound)
}

func help() {
	commands := make([]string, len(cmds))
	for i, c := range cmds {
		commands[i] = c.Name()
	}
	fmt.Fprint(os.Stderr, "USAGE: hlctl [command] [arguments]\n")
	fmt.Fprintf(os.Stderr, "\nAvailable commands: %v\n", commands)
	fmt.Fprint(os.Stderr, "\nSee hlctl help [command] for details\n")
}

func main() {
	// omit the program name
	args := os.Args[1:]
	if len(args) == 0 {
		help()
		os.Exit(1)
	}
	command := strings.ToLower(args[0])
	if command == "help" {
		if len(args) == 1 {
			help()
			return
		}
		name := args[1]
		c, err := getCmdlet(name)
		if err != nil {
			help()
			os.Exit(1)
		}
		fmt.Println(c.Usage())
		return
	}
	c, err := getCmdlet(command)
	if err != nil {
		help()
		os.Exit(1)
	}

	if err := c.Invoke(args[1:]...); err != nil {
		log.Fatalf(" %s > %s", c.Name(), err.Error())
	}
}