package tui

import (
	"fmt"
	"io"
	"strings"

	"github.com/charmbracelet/bubbles/list"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
)

// itemDelegate is a custom list delegate that renders both folderItems and
// requestItems in a single-row style with method colour coding.
type itemDelegate struct{}

func (d itemDelegate) Height() int  { return 1 }
func (d itemDelegate) Spacing() int { return 0 }

func (d itemDelegate) Update(_ tea.Msg, _ *list.Model) tea.Cmd { return nil }

func (d itemDelegate) Render(w io.Writer, m list.Model, index int, itm list.Item) {
	isSelected := index == m.Index()
	maxW := m.Width()
	if maxW <= 0 {
		maxW = 30
	}

	switch i := itm.(type) {
	case folderItem:
		line := folderItemStyle.Render("  ▸ " + strings.ToUpper(i.name))
		fmt.Fprint(w, line)

	case requestItem:
		method := fmt.Sprintf("%-6s", i.request.Method)
		styledMethod := methodStyle(i.request.Method).Render(method)

		name := i.request.Name
		// Truncate to avoid overflowing the panel
		nameMax := maxW - 10
		if nameMax < 1 {
			nameMax = 1
		}
		if len(name) > nameMax {
			name = name[:nameMax-1] + "…"
		}

		indent := "  "
		if i.folder != "" {
			indent = "    "
		}

		var styledName string
		if isSelected {
			styledName = selectedItemStyle.Render(name)
			cursor := lipgloss.NewStyle().Foreground(colorPurple).Render("▶")
			fmt.Fprintf(w, "%s%s %s %s", indent, cursor, styledMethod, styledName)
		} else {
			styledName = lipgloss.NewStyle().Foreground(colorFg).Render(name)
			fmt.Fprintf(w, "%s  %s %s", indent, styledMethod, styledName)
		}
	}
}