package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

func help(args []string) {
	fmt.Println()
	fmt.Println(Translate("Commands:"))
	fmt.Println(Translate("ls: list files"))
	fmt.Println(Translate("cd: change directory"))
	fmt.Println(Translate("rm: mark files for removal"))
	fmt.Println(Translate("urm: unmark files for removal"))
	fmt.Println(Translate("exit: delete marked files and exit"))
	fmt.Println()
}

func ls(args []string) {
	path := strings.Join(args, " ")
	if path == "" {
		path = "."
	}

	entries := getEntriesForPath(path)
	if len(entries) == 0 {
		showError("'%s' could not be found", path)
		return
	}

	for _, entry := range entries {
		fmt.Println()
		fmt.Println(entry.StringRecursive(1))
	}
}

func rm(args []string, removalMark bool) {
	path := strings.Join(args, " ")

	entries := getEntriesForPath(path)
	if len(entries) == 0 {
		showError("'%s' could not be found", path)
		return
	}

	for _, entry := range entries {
		entry.SetRemovalMark(removalMark)
	}
}

func cd(args []string) {
	path := "/"
	if len(args) > 0 {
		path = args[0]
	}

	entries := getEntriesForPath(path)
	if len(entries) == 0 {
		showError("'%s' could not be found", path)
		return
	} else if len(entries) > 1 {
		b := new(strings.Builder)
		for _, entry := range entries {
			path := strings.TrimPrefix(entry.Path(), Current.Path()+"/")
			path = strings.TrimPrefix(path, Root.Path())
			b.WriteString(path)
			b.WriteRune('\n')
		}
		showError("ambiguous path: %s", path)
		fmt.Println(Translate("possible paths:\n%s", b.String()))
		return
	}

	entry := entries[0]
	if entry.IsDir() {
		Current = entry
		fmt.Println()
	} else {
		showError("'%s' is not a directory", entry.Name())
	}
}

func exit() {
	fmt.Println()

	stats := new(RemovalStats)
	Root.RemovalStats(stats)

	if len(stats.Paths) == 0 {
		s := bufio.NewScanner(os.Stdin)
		s.Split(bufio.ScanRunes)

		fmt.Print(Translate("exit? [%s/%s]: ", "y", "N"))
		if s.Scan() {
			text := strings.ToLower(s.Text())
			if text == "y" || text == "yes" {
				os.Exit(0)
			}
		}
		return
	}

	fmt.Println(Translate("The following items will be removed:"))
	fmt.Println(stats)

	s := bufio.NewScanner(os.Stdin)
	s.Split(bufio.ScanRunes)

	fmt.Print(Translate("Delete files? [%s/%s/%s]: ", ColorRed.Sprint("y"), "n", "C"))
	if s.Scan() {
		text := strings.ToLower(s.Text())
		if text == "y" || text == "yes" {
			removeMarkedEntries(Root)
			os.Exit(0)
		} else if text == "n" || text == "no" {
			os.Exit(0)
		}
	}
}