package main

import (
	"fmt"
	"strings"
)

func cmdManageTag(args []string) int {
	if len(args) == 0 {
		return cmdListTags(args)
	}
	return cmdEditTag(args)
}

func cmdListTags(args []string) int {
	m, err := LoadMetadata()
	if err != nil {
		fmt.Println("Error loading tags")
		return 1
	}

	fmt.Println("[")
	for _, v := range m.Tags {
		fmt.Println("  " + v.String())
	}
	fmt.Println("]")
	return 0
}

func cmdEditTag(args []string) int {
	m, err := LoadMetadata()
	if err != nil {
		fmt.Println("Error loading tags")
		return 1
	}
	// The first argument should be the tag name that we want to edit
	tagName := args[0]
	if tagName[0] == '+' {
		tagName = tagName[1:]
	}
	tg := m.GetTag(tagName)
	if tg == nil {
		tg = NewTag(tagName, false)
	}
	for _, v := range args[1:] {
		switch v[0] {
		case '+':
			// Altering tag name
			tg.Name = v[1:]
		case ':':
			// Altering billable flag
			if strings.HasPrefix(v, ":non") {
				tg.SetBillable(false)
			} else if strings.HasPrefix(v, ":bill") {
				tg.SetBillable(true)
			}
		}
	}
	m.SaveTag(tg)
	if err = SaveMetadata(m); err != nil {
		fmt.Println("Error saving metadata: " + err.Error())
		return 1
	}
	fmt.Println(tg.String())
	return 0
}