package views

import (
	"fmt"
	"strings"
	"unicode"
)

// SyncAction is a sync menu choice.
type SyncAction string

const (
	SyncActionPull SyncAction = "pull"
	SyncActionPush SyncAction = "push"
)

// SyncOption is one row in the sync menu.
type SyncOption struct {
	Action   SyncAction
	Label    string
	Shortcut rune
}

// SyncMenu renders a pull/push picker overlay.
type SyncMenu struct {
	Cursor  int
	Width   int
	Title   string
	Options []SyncOption
	Styles  StatusMenuStyles
}

// NewSyncMenu creates a sync action menu for the given backend label.
func NewSyncMenu(width int, styles StatusMenuStyles, backendLabel string) SyncMenu {
	if backendLabel == "" {
		backendLabel = "Sync"
	}
	opts := []SyncOption{
		{Action: SyncActionPull, Label: "Pull from " + backendLabel, Shortcut: 'p'},
		{Action: SyncActionPush, Label: "Push to " + backendLabel, Shortcut: 'u'},
	}
	return SyncMenu{Cursor: 0, Width: width, Title: backendLabel, Options: opts, Styles: styles}
}

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

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

// JumpToShortcut selects the option whose shortcut matches r.
func (m *SyncMenu) JumpToShortcut(r rune) bool {
	r = unicode.ToLower(r)
	for i, opt := range m.Options {
		if opt.Shortcut == r {
			m.Cursor = i
			return true
		}
	}
	return false
}

// Selected returns the highlighted action.
func (m SyncMenu) Selected() SyncAction {
	if m.Cursor < 0 || m.Cursor >= len(m.Options) {
		return SyncActionPull
	}
	return m.Options[m.Cursor].Action
}

// View renders the sync menu.
func (m SyncMenu) View() string {
	var lines []string
	lines = append(lines, m.Styles.Title.Render(m.Title))
	for i, opt := range m.Options {
		entry := fmt.Sprintf("%c  %s", opt.Shortcut, opt.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(44, w-2)).Render(body)
}