package main

import (
	"time"

	termboxUtil "git.bullercodeworks.com/brian/termbox-util"
	termbox "github.com/nsf/termbox-go"
)

const MessageNoTimeout = -1

type Message struct {
	value   string
	timeout time.Duration
	setTime time.Time
	fg, bg  termbox.Attribute

	defaultValue   string
	defaultTimeout time.Duration
	defaultFg      termbox.Attribute
	defaultBg      termbox.Attribute
}

func NewMessage(defaultVal string, defaultFg, defaultBg termbox.Attribute, defaultTO time.Duration) *Message {
	return &Message{
		defaultValue:   defaultVal,
		defaultTimeout: defaultTO,
		defaultFg:      defaultFg,
		defaultBg:      defaultBg,
	}
}

func (m *Message) Get() string {
	m.checkExpiration()
	return m.value
}

func (m *Message) Set(v string) {
	m.value = v
	m.setTime = time.Now()
}

func (m *Message) Clear() {
	m.value = m.defaultValue
	m.setTime = time.Time{}
	m.setFromDefaults()
}

func (m *Message) SetWithNoTimeout(v string) {
	m.Set(v)
	m.timeout = MessageNoTimeout
}

func (m *Message) SetWithTimeout(v string, t time.Duration) {
	m.Set(v)
	m.timeout = t
}

func (m *Message) SetError(v string) {
	m.value = v
	m.setTime = time.Now()
	m.timeout = time.Second * 2
	m.bg = termbox.ColorRed
	m.fg = termbox.ColorWhite | termbox.AttrBold
}

func (m *Message) DrawAt(x, y int) {
	termboxUtil.DrawStringAtPoint(m.value, x, y, m.fg, m.bg)
}

func (m *Message) checkExpiration() {
	if m.expired() {
		m.Clear()
	}
}

func (m *Message) expired() bool {
	return m.timeout > 0 && time.Since(m.setTime) > m.timeout
}

func (m *Message) setFromDefaults() {
	m.value = m.defaultValue
	m.timeout = m.defaultTimeout
	m.fg, m.bg = m.defaultFg, m.defaultBg
}