package gui

import (
	"fmt"
	"gitea.tyrel.dev/tyrel/itor/models"
	"github.com/charmbracelet/bubbles/list"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
	"io"
)

var (
	titleStyle        = lipgloss.NewStyle().MarginLeft(2)
	itemStyle         = lipgloss.NewStyle().PaddingLeft(4)
	selectedItemStyle = lipgloss.NewStyle().PaddingLeft(2).Foreground(lipgloss.Color("170"))
	paginationStyle   = list.DefaultStyles().PaginationStyle.PaddingLeft(4)
	helpStyle         = list.DefaultStyles().HelpStyle.PaddingLeft(4).PaddingBottom(1)
	quitTextStyle     = lipgloss.NewStyle().Margin(1, 0, 2, 4)
)

type itemDelegate struct{}

func (d itemDelegate) Height() int {
	return 1
}

func (d itemDelegate) Spacing() int {
	return 0
}

func (d itemDelegate) Update(msg tea.Msg, m *list.Model) tea.Cmd {
	return nil
}

func (d itemDelegate) Render(w io.Writer, m list.Model, index int, listItem list.Item) {
	i, ok := listItem.(models.Card)
	if !ok {
		return
	}

	checked := " " // not selected
	if i.Selected {
		checked = "✓" // selected!
	}

	str := fmt.Sprintf("[%s] %d. %s", checked, index+1, i.ToString())

	fn := itemStyle.Render
	if index == m.Index() {
		fn = func(s string) string {
			return selectedItemStyle.Render("> " + s)
		}
	}

	_, _ = fmt.Fprint(w, fn(str)) // ignore error
}

func (m *model) updateSelect(msg tea.Msg) (tea.Model, tea.Cmd) {
	switch msg := msg.(type) {
	case tea.WindowSizeMsg:
		m.selectList.SetWidth(msg.Width)
		return m, nil

	// Is it a key press?
	case tea.KeyMsg:
		switch msg.String() {
		case "ctrl+c", "q":
			return m, tea.Quit

		// The "up" and "k" keys move the selectCardIndex up
		case "up", "k":
			if m.selectCardIndex > 0 {
				m.selectCardIndex--
			}

		// The "down" and "j" keys move the selectCardIndex down
		case "down", "j":
			if m.selectCardIndex < len(m.deck)-1 {
				m.selectCardIndex++
			}

		// MODES
		case "d":
			// Only draw if at least one card
			if len(m.selected) > 0 {
				m.drawRandomCard()
				m.switchMode(Draw)
			}
		case "c":
			m.switchMode(Create)

		// The "enter" key and the spacebar (a literal space) toggle
		// the selected state for the item that the selectCardIndex is pointing at.
		case "enter", " ":
			card, ok := m.selectList.SelectedItem().(models.Card)
			if ok {
				idx := SliceIndex(len(m.deck), func(i int) bool { return m.deck[i].Id == card.Id })
				if _, ok := m.selected[idx]; ok {
					delete(m.selected, idx)
					m.deck[idx].Selected = false
				} else {
					m.selected[idx] = struct{}{}
					m.deck[idx].Selected = true
				}
				m.selectList.SetItem(idx, m.deck[idx])
			}
		}
	}

	var cmd tea.Cmd
	m.selectList, cmd = m.selectList.Update(msg)
	return m, cmd
}
func (m *model) viewSelect() string {

	return template(`Select cards to draw:
{selectList}

Press [↑/k] move up.
Press [↓/j] move down.
Press [enter/space] to toggle selection.
Press [c] to Create.
Press [d] to Draw.
Press [q] to quit.
`,
		"{selectList}", m.selectList.View(),
	)
}

func SliceIndex(limit int, predicate func(i int) bool) int {
	for i := 0; i < limit; i++ {
		if predicate(i) {
			return i
		}
	}
	return -1
}