package views

import (
	"fmt"
	"strings"
	"unicode"

	"github.com/charmbracelet/lipgloss"

	"task/internal/ticket"
)

// StatusMenu renders a status picker overlay.
type StatusMenu struct {
	Cursor int
	Width  int
	Styles StatusMenuStyles
}

// StatusMenuStyles holds styles for the status picker.
type StatusMenuStyles struct {
	Box      lipgloss.Style
	Title    lipgloss.Style
	Selected lipgloss.Style
	Normal   lipgloss.Style
}

// NewStatusMenu creates a menu with the given status pre-selected.
func NewStatusMenu(current ticket.Status, width int, styles StatusMenuStyles) StatusMenu {
	return StatusMenu{
		Cursor: current.Index(),
		Width:  width,
		Styles: styles,
	}
}

// MoveDown moves the selection down.
func (m *StatusMenu) MoveDown() {
	if m.Cursor < len(ticket.AllStatuses)-1 {
		m.Cursor++
	}
}

// MoveUp moves the selection up.
func (m *StatusMenu) MoveUp() {
	if m.Cursor > 0 {
		m.Cursor--
	}
}

// JumpToShortcut moves the cursor to the status whose label starts with r.
func (m *StatusMenu) JumpToShortcut(r rune) bool {
	r = unicode.ToLower(r)
	for i, st := range ticket.AllStatuses {
		if st.Shortcut() == r {
			m.Cursor = i
			return true
		}
	}
	return false
}

// Selected returns the currently highlighted status.
func (m StatusMenu) Selected() ticket.Status {
	if m.Cursor < 0 || m.Cursor >= len(ticket.AllStatuses) {
		return ticket.StatusTodo
	}
	return ticket.AllStatuses[m.Cursor]
}

// View renders the status menu.
func (m StatusMenu) View() string {
	var lines []string
	lines = append(lines, m.Styles.Title.Render("Set status"))
	for i, st := range ticket.AllStatuses {
		entry := fmt.Sprintf("%c  %s", st.Shortcut(), st.Label())
		if i == m.Cursor {
			lines = append(lines, m.Styles.Selected.Render("▸ "+entry))
		} else {
			lines = append(lines, m.Styles.Normal.Render("  "+entry))
		}
	}
	body := strings.Join(lines, "\n")
	w := m.Width
	if w < 20 {
		w = 20
	}
	return m.Styles.Box.Width(min(40, w-2)).Render(body)
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}