package tui

import (
	"fmt"
	"strings"

	"github.com/charmbracelet/lipgloss"
	"github.com/muyue/muyue/internal/version"
)

func (m Model) renderHeader() string {
	var tabs []string
	for i, name := range tabNames {
		icon := tabIcons[i]
		if tab(i) == m.activeTab {
			tabStyle := lipgloss.NewStyle().
				Background(cyberRed).
				Foreground(lipgloss.Color("#FFFFFF")).
				Bold(true).
				Padding(0, 2)
			tabs = append(tabs, tabStyle.Render(icon+" "+name))
		} else {
			tabStyle := lipgloss.NewStyle().
				Background(bgSurface).
				Foreground(textDim).
				Padding(0, 2)
			tabs = append(tabs, tabStyle.Render(icon+" "+name))
		}
	}

	tabLine := tabBarStyle.Render(lipgloss.JoinHorizontal(lipgloss.Bottom, tabs...))

	timeStr := ""
	if !m.currentTime.IsZero() {
		timeStr = m.currentTime.Format("15:04:05")
	}

	dateStr := ""
	if !m.currentTime.IsZero() {
		dateStr = m.currentTime.Format("02/01/2006")
	}

	rightInfo := lipgloss.NewStyle().Background(bgSurface).Padding(0, 1).Render(
		lipgloss.JoinHorizontal(lipgloss.Center,
			lipgloss.NewStyle().Foreground(textDim).Render(dateStr+" "),
			lipgloss.NewStyle().Foreground(cyberRed).Bold(true).Render(timeStr),
			lipgloss.NewStyle().Foreground(textMuted).Render("  "+getAnimFrame(m.animationFrame)),
		),
	)

	statusDots := ""
	if m.config != nil {
		hasAI := false
		for _, p := range m.config.AI.Providers {
			if p.Active && p.APIKey != "" {
				hasAI = true
				break
			}
		}
		if hasAI {
			statusDots += lipgloss.NewStyle().Foreground(successGreen).Render("●")
		} else {
			statusDots += lipgloss.NewStyle().Foreground(errorRed).Render("●")
		}
	} else {
		statusDots += lipgloss.NewStyle().Foreground(warnAmber).Render("●")
	}

	statusDots += lipgloss.NewStyle().Foreground(textMuted).Render(" ")

	if m.mcpConfigured {
		statusDots += lipgloss.NewStyle().Foreground(successGreen).Render("●")
	} else {
		statusDots += lipgloss.NewStyle().Foreground(warnAmber).Render("●")
	}

	statusInfo := lipgloss.NewStyle().Background(bgSurface).Padding(0, 1).Render(
		lipgloss.JoinHorizontal(lipgloss.Center,
			lipgloss.NewStyle().Foreground(textDim).Render("SYS "),
			statusDots,
		),
	)

	badge := lipgloss.NewStyle().Foreground(cyberRed).Bold(true).Render("MUYUE")
	versionBadge := lipgloss.NewStyle().Foreground(dimRed).Render("v" + version.Version)

	logoLine := lipgloss.NewStyle().Background(bgVoid).Padding(0, 1).Render(
		lipgloss.JoinHorizontal(lipgloss.Center, badge, " ", versionBadge),
	)

	topLine := lipgloss.JoinHorizontal(lipgloss.Bottom,
		logoLine,
		strings.Repeat(" ", max(0, m.width-lipgloss.Width(logoLine)-lipgloss.Width(rightInfo)-lipgloss.Width(statusInfo))),
		statusInfo,
		rightInfo,
	)

	return lipgloss.JoinVertical(lipgloss.Left, topLine, tabLine)
}

func (m Model) renderTabMenuOverlay() string {
	menuStyle := lipgloss.NewStyle().
		Border(lipgloss.RoundedBorder()).
		BorderForeground(cyberRed).
		Background(bgCard).
		Padding(1, 3)

	tabItemStyle := lipgloss.NewStyle().
		Foreground(textDim).
		Padding(0, 2)

	tabItemActiveStyle := lipgloss.NewStyle().
		Foreground(lipgloss.Color("#FFFFFF")).
		Background(cyberRed).
		Bold(true).
		Padding(0, 2)

	descs := []string{
		"tools, updates & system status",
		"chat, agents & workflows",
		"terminal + AI assistant",
		"profile, API keys & settings",
	}

	var items []string
	for i, name := range tabNames {
		num := lipgloss.NewStyle().Foreground(dimRed).Render(fmt.Sprintf(" %d.", i+1))
		icon := tabIcons[i] + " "
		if i == m.tabMenuCursor {
			item := fmt.Sprintf("%s %s%-10s %s", num, icon, name, lipgloss.NewStyle().Foreground(cyberRose).Render(descs[i]))
			items = append(items, tabItemActiveStyle.Render(">"+item))
		} else {
			item := fmt.Sprintf("%s %s%-10s %s", num, icon, name, lipgloss.NewStyle().Foreground(textMuted).Render(descs[i]))
			items = append(items, tabItemStyle.Render(" "+item))
		}
	}

	header := lipgloss.NewStyle().Foreground(cyberRed).Bold(true).Render("SWITCH TAB")
	content := header + "\n\n" +
		strings.Join(items, "\n") +
		"\n\n" +
		lipgloss.NewStyle().Foreground(textMuted).Render("up/down navigate | enter select | esc cancel")

	box := menuStyle.Render(content)

	return lipgloss.Place(m.width, m.height,
		0.5, 0.5,
		box,
		lipgloss.WithWhitespaceBackground(bgVoid),
		lipgloss.WithWhitespaceForeground(textMuted),
	)
}

func (m Model) renderQuitOverlay() string {
	yesStyle := confirmNoStyle
	noStyle := confirmYesStyle
	if m.confirmCursor == 0 {
		yesStyle = confirmYesStyle
		noStyle = confirmNoStyle
	}

	frame := lipgloss.NewStyle().Foreground(cyberRed).Render(getAnimFrame(m.animationFrame))

	box := fmt.Sprintf("\n\n  %s Quit muyue?\n\n  %s    %s",
		frame,
		yesStyle.Render("[ Yes ]"),
		noStyle.Render("[ No ]"),
	)

	content := confirmBoxStyle.Render(box)

	return lipgloss.Place(m.width, m.height,
		0.5, 0.5,
		content,
		lipgloss.WithWhitespaceBackground(bgVoid),
		lipgloss.WithWhitespaceForeground(textMuted),
	)
}