package main

import (
	"fmt"
	"io"
	"os"
	"path/filepath"
	"strings"

	"git.icyphox.sh/mx/commands"
	"github.com/peterh/liner"
)

var (
	hd, _    = os.UserHomeDir()
	histfile = filepath.Join(hd, ".mx.hist")
)

func main() {
	line := liner.NewLiner()
	defer line.Close()

	line.SetCtrlCAborts(true)

	line.SetCompleter(func(line string) (c []string) {
		for n, _ := range commands.Commands {
			if strings.HasPrefix(n, strings.ToLower(line)) {
				c = append(c, n)
			}
		}
		return
	})

	if f, err := os.Open(histfile); err == nil {
		line.ReadHistory(f)
		f.Close()
	}

	prompt := ""
	for {
		if cmd, err := line.Prompt(prompt + " > "); err == nil {
			commands.ProcessCommands(cmd)
			line.AppendHistory(cmd)
			prompt = cmd
		} else if err == liner.ErrPromptAborted || err == io.EOF {
			fmt.Print("bye!")
			break
		} else {
			fmt.Errorf("error reading line: %+v", err)
		}
	}

	if f, err := os.Create(histfile); err != nil {
		fmt.Errorf("error writing history file: %+v", err)
	} else {
		line.WriteHistory(f)
		f.Close()
	}
}