// Shared screen chrome: a header rule (app name + server) and a footer rule
// (status + help) used by the browse and playing screens so they feel like one
// app rather than three separate views.
package tui

import (
	"net/url"
	"strings"

	"github.com/charmbracelet/lipgloss"
)

// hostLabel extracts a friendly host from a server URL — no scheme or port, and
// a trailing ".local" trimmed (so "http://omabox.local:8096" → "omabox").
func hostLabel(raw string) string {
	u, err := url.Parse(raw)
	if err != nil || u.Host == "" {
		return raw
	}
	return strings.TrimSuffix(u.Hostname(), ".local")
}

// serverLabel prefers a discovered server's advertised name (matched by URL),
// otherwise falls back to the host portion of the configured URL.
func (m Model) serverLabel() string {
	for _, s := range m.discovered {
		if s.Address == m.cfg.ServerURL && s.Name != "" {
			return s.Name
		}
	}
	return hostLabel(m.cfg.ServerURL)
}

// frameWidth returns the usable width, with a sane fallback before the first
// WindowSizeMsg arrives.
func (m Model) frameWidth() int {
	if m.width <= 0 {
		return 80
	}
	return m.width
}

// headerBar renders the top rule: " tsplay ───────────────── server ".
func (m Model) headerBar() string {
	title := m.st.title.Render(" tsplay ")
	srv := ""
	if s := m.serverLabel(); s != "" {
		srv = m.st.muted.Render(" " + s + " ")
	}
	dash := m.frameWidth() - lipgloss.Width(title) - lipgloss.Width(srv)
	if dash < 1 {
		dash = 1
	}
	return title + m.st.barEmpty.Render(strings.Repeat("─", dash)) + srv
}

// footerBar renders a thin rule, an optional accent status line, then the help
// keys — the consistent bottom of every framed screen.
func (m Model) footerBar(help, status string) string {
	rule := m.st.barEmpty.Render(strings.Repeat("─", m.frameWidth()))
	lines := []string{rule}
	if status != "" {
		lines = append(lines, " "+m.st.accent.Render(status))
	}
	lines = append(lines, " "+m.st.help.Render(help))
	return strings.Join(lines, "\n")
}