package views

import (
	"unicode"

	"github.com/charmbracelet/bubbles/list"

	"task/internal/project"
)

// ProjectItem wraps a project for bubbles/list.
type ProjectItem struct {
	Project project.Project
	Active  bool
}

func (i ProjectItem) Title() string {
	if i.Active {
		return i.Project.Name + " *"
	}
	return i.Project.Name
}
func (i ProjectItem) Description() string { return i.Project.ID }
func (i ProjectItem) FilterValue() string { return i.Project.Name }

// NewProjectList builds a list of projects.
func NewProjectList(projects []project.Project, activeID string, width, height int) list.Model {
	items := make([]list.Item, len(projects))
	selected := 0
	for i, p := range projects {
		items[i] = ProjectItem{Project: p, Active: p.ID == activeID}
		if p.ID == activeID {
			selected = i
		}
	}

	delegate := list.NewDefaultDelegate()
	delegate.ShowDescription = false
	l := list.New(items, delegate, width, height)
	l.Title = "Projects"
	l.SetShowStatusBar(false)
	l.SetShowHelp(false)
	l.SetFilteringEnabled(false)
	l.DisableQuitKeybindings()
	if len(items) > 0 {
		l.Select(selected)
	}
	return l
}

// JumpProjectByLetter cycles to the next project whose name starts with r.
func JumpProjectByLetter(l *list.Model, r rune) bool {
	r = unicode.ToLower(r)
	items := l.Items()
	n := len(items)
	if n == 0 {
		return false
	}
	start := l.Index()
	for step := 1; step <= n; step++ {
		i := (start + step) % n
		pi, ok := items[i].(ProjectItem)
		if !ok {
			continue
		}
		name := []rune(pi.Project.Name)
		if len(name) == 0 {
			continue
		}
		if unicode.ToLower(name[0]) == r {
			l.Select(i)
			return true
		}
	}
	return false
}

// ProjectsToItems converts projects to list items.
func ProjectsToItems(projects []project.Project, activeID string) []list.Item {
	items := make([]list.Item, len(projects))
	for i, p := range projects {
		items[i] = ProjectItem{Project: p, Active: p.ID == activeID}
	}
	return items
}