package ui

import (
	"fmt"
	"io"
	"strconv"
	"strings"

	"charm.land/bubbles/v2/list"
	tea "charm.land/bubbletea/v2"
	"github.com/charmbracelet/x/ansi"
	zone "github.com/lrstanley/bubblezone/v2"

	"github.com/anotherhadi/default-creds-tui/internal/creds"
)

const cardHeight = 4

func entryUserZoneID(index int) string { return "entry-user-" + strconv.Itoa(index) }
func entryPassZoneID(index int) string { return "entry-pass-" + strconv.Itoa(index) }
func entryZoneID(index int) string     { return "entry-" + strconv.Itoa(index) }

func clampToWidth(s string, width int) string {
	if width <= 0 {
		return s
	}
	return ansi.Truncate(s, width, "…")
}

type entryDelegate struct{}

func (d entryDelegate) Height() int                             { return cardHeight }
func (d entryDelegate) Spacing() int                            { return 1 }
func (d entryDelegate) Update(_ tea.Msg, _ *list.Model) tea.Cmd { return nil }

func (d entryDelegate) Render(w io.Writer, m list.Model, index int, item list.Item) {
	e, ok := item.(creds.Entry)
	if !ok {
		return
	}
	selected := index == m.Index()
	width := m.Width()

	side := unselectedIndentStyle
	name := nameStyle
	if selected {
		side = selectedBorderStyle
		name = nameSelectedStyle
	}

	titleParts := []string{manufacturerStyle.Render(strings.ToUpper(e.Manufacturer))}
	if e.Version != "" && e.Version != "all" {
		titleParts = append(titleParts, versionStyle.Render("v"+e.Version))
	}
	line1 := strings.Join(titleParts, subtleStyle.Render("  ·  "))
	line2 := name.Render(e.Name)

	var chips []string
	if e.User != "" {
		chips = append(chips, zone.Mark(entryUserZoneID(index), chipStyle.Render("user: "+e.User)))
	}
	if e.Pass != "" {
		chips = append(chips, zone.Mark(entryPassZoneID(index), chipStyle.Render("pass: "+e.Pass)))
	}
	line3 := strings.Join(chips, " ")
	if line3 == "" {
		line3 = mutedStyle.Render("(no credentials listed)")
	}

	line4 := ""
	switch {
	case e.Comment != "":
		line4 = commentStyle.Render(e.Comment)
	case len(e.Tags) > 0:
		line4 = subtleStyle.Render("#" + strings.Join(e.Tags, " #"))
	}

	lines := []string{
		clampToWidth(side.Render(line1), width),
		clampToWidth(side.Render(line2), width),
		clampToWidth(side.Render(line3), width),
		clampToWidth(side.Render(line4), width),
	}
	fmt.Fprint(w, zone.Mark(entryZoneID(index), strings.Join(lines, "\n")))
}