package gui

import (
	"fmt"
	"gitea.tyrel.dev/tyrel/itor/models"

	tea "github.com/charmbracelet/bubbletea"
)

type errMsg error

const InputCount = 2

func (m *model) nextTabIndex() {
	m.createdInputIndex++
	m.createdInputIndex = m.createdInputIndex % InputCount
}

func (m *model) createCurrent() {
	// Get the value of the front and back of the card
	front := m.createInputs[0].Value()
	back := m.createInputs[1].Value()

	if front == "" || back == "" {
		return
	}

	// Create a new card
	card := models.Card{
		Front: front,
		Back:  back,
	}
	// Add it to the deck
	m.deck = append(m.deck, card)

	m.selectList.InsertItem(len(m.selectList.Items())+1, card)

	// Clear the inputs
	for i, _ := range m.createInputs {
		m.createInputs[i].Reset()
	}

	// Back to Select
	m.switchMode(Select)
}

func (m *model) updateCreate(msg tea.Msg) (tea.Model, tea.Cmd) {
	var cmd tea.Cmd

	switch msg := msg.(type) {
	case tea.KeyMsg:
		switch msg.Type {
		case tea.KeyCtrlC:
			return m, tea.Quit
		case tea.KeyEsc:
			m.switchMode(Select)
			return m, cmd
		case tea.KeyEnter:
			m.createCurrent()
		case tea.KeyTab:
			m.createInputs[m.createdInputIndex].Blur()
			m.nextTabIndex()
			m.createInputs[m.createdInputIndex].Focus()
		}

	// We handle errors just like any other message
	case errMsg:
		m.err = msg
		return m, nil
	}
	for i, _ := range m.createInputs {
		m.createInputs[i], cmd = m.createInputs[i].Update(msg)
	}

	return m, cmd
}

func (m *model) viewCreate() string {
	s := fmt.Sprintf(
		"Create a card:\n\nFront: %s\nBack: %s\n\n[Tab] switch field.\n[Enter] creates new card.\n[Escape] for back.",
		m.createInputs[0].View(),
		m.createInputs[1].View(),
	)

	return s
}