package dashboard

import (
	"github.com/LazyBachelor/LazyPM/pkg/tui/styles"
	"github.com/charmbracelet/lipgloss"
)

type HelpBar struct {
	keyMap  DashboardKeyMap
	showAll bool
	width   int
}

func NewHelpBar(keyMap DashboardKeyMap) HelpBar {
	return HelpBar{keyMap: keyMap}
}

func (h *HelpBar) SetWidth(width int) {
	h.width = width
}

func (h HelpBar) View() string {
	if h.width == 0 {
		return ""
	}
	if h.showAll {
		return h.fullHelp()
	}
	return h.shortHelp()
}

func (h HelpBar) shortHelp() string {
	keys := []string{
		styles.HighlightKey("tab") + "switch ",
		styles.HighlightKey("↑/k") + "up ",
		styles.HighlightKey("↓/j") + "down ",
		styles.HighlightKey("pgup/pgdn") + "page ",
		styles.HighlightKey("a") + "add ",
		styles.HighlightKey("e/d/s/p/t/c") + "edit ",
		styles.HighlightKey("x") + "delete ",
		styles.HighlightKey("q") + "quit ",
		styles.HighlightKey("S") + "submit ",
		styles.HighlightKey("?") + "help ",
	}
	content := lipgloss.JoinHorizontal(lipgloss.Left, keys...)
	return lipgloss.NewStyle().
		Border(lipgloss.Border{Top: "─"}, true, false, false, false).
		BorderForeground(styles.SecondaryBorder).
		Padding(0, 1).
		Width(h.width).
		Render(content)
}

func (h HelpBar) fullHelp() string {
	keyStyle := lipgloss.NewStyle().Width(8).Align(lipgloss.Right)
	descStyle := lipgloss.NewStyle().Width(12)

	renderHelpItem := func(key, desc string) string {
		return lipgloss.JoinHorizontal(
			lipgloss.Left,
			keyStyle.Render(styles.HighlightKey(key)),
			" ",
			descStyle.Render(desc),
		)
	}

	renderRow := func(leftKey, leftDesc, rightKey, rightDesc string) string {
		leftItem := renderHelpItem(leftKey, leftDesc)
		rightItem := renderHelpItem(rightKey, rightDesc)
		return lipgloss.JoinHorizontal(lipgloss.Left, leftItem, "  ", rightItem)
	}

	rows := []string{
		renderRow("tab", "switch window", "↑/k", "up"),
		renderRow("enter", "view issue", "↓/j", "down"),
		renderRow("pgup", "page up", "pgdn", "page down"),
		renderRow("b", "back to list", "a", "add issue"),
		renderRow("e", "edit title", "d", "edit desc"),
		renderRow("c", "add comment", "", ""),
		renderRow("s", "change status", "p", "change priority"),
		renderRow("t", "change type", "x", "delete issue"),
		renderRow("S", "submit task", "q", "quit"),
	}
	content := lipgloss.JoinVertical(lipgloss.Left, rows...)
	return lipgloss.NewStyle().
		Border(lipgloss.Border{Top: "─"}, true, false, false, false).
		BorderForeground(styles.SecondaryBorder).
		Padding(0, 1).
		Width(h.width).
		Render(content)
}

func (h HelpBar) Height() int {
	if h.width == 0 {
		return 0
	}
	return lipgloss.Height(h.View())
}

func (h HelpBar) IsExpanded() bool {
	return h.showAll
}

func (h *HelpBar) ToggleHelp() {
	h.showAll = !h.showAll
}