MuyueWorkspace/internal/tui/app.go

package tui

import (
	"fmt"
	"os"
	"os/exec"
	"path/filepath"
	"regexp"
	"strings"
	"time"

	"github.com/charmbracelet/bubbles/help"
	"github.com/charmbracelet/bubbles/key"
	"github.com/charmbracelet/bubbles/progress"
	"github.com/charmbracelet/bubbles/spinner"
	"github.com/charmbracelet/bubbles/viewport"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
	"github.com/muyue/muyue/internal/config"
	"github.com/muyue/muyue/internal/daemon"
	"github.com/muyue/muyue/internal/installer"
	"github.com/muyue/muyue/internal/lsp"
	"github.com/muyue/muyue/internal/mcp"
	"github.com/muyue/muyue/internal/orchestrator"
	"github.com/muyue/muyue/internal/preview"
	"github.com/muyue/muyue/internal/proxy"
	"github.com/muyue/muyue/internal/scanner"
	"github.com/muyue/muyue/internal/skills"
	"github.com/muyue/muyue/internal/updater"
	"github.com/muyue/muyue/internal/version"
	"github.com/muyue/muyue/internal/workflow"
)

type tab int

const (
	tabDashboard tab = iota
	tabChat
	tabWorkflow
	tabTerminal
	tabAgents
	tabConfig
	tabCount
)

var tabNames = []string{"Dashboard", "Chat", "Workflow", "Terminal", "Agents", "Config"}

var (
	baseColor    = lipgloss.Color("#FF6B9D")
	accentColor  = lipgloss.Color("#A0D2FF")
	aiColor      = lipgloss.Color("#C4B5FD")
	successColor = lipgloss.Color("#4ADE80")
	warningColor = lipgloss.Color("#FBBF24")
	errorColor   = lipgloss.Color("#FF6B6B")
	mutedColor   = lipgloss.Color("#666680")
	dimColor     = lipgloss.Color("#444460")
	bgDark       = lipgloss.Color("#1A1A2E")
	bgPanel      = lipgloss.Color("#16213E")
	bgCard       = lipgloss.Color("#1F2937")

	sectionStyle = lipgloss.NewStyle().
			Foreground(accentColor).
			Bold(true)

	itemOKStyle = lipgloss.NewStyle().
			Foreground(successColor)

	itemMissingStyle = lipgloss.NewStyle().
			Foreground(errorColor)

	itemWarnStyle = lipgloss.NewStyle().
			Foreground(warningColor)

	itemPendingStyle = lipgloss.NewStyle().
			Foreground(mutedColor)

	userMsgStyle = lipgloss.NewStyle().
			Foreground(accentColor)

	aiMsgStyle = lipgloss.NewStyle().
			Foreground(aiColor)

	errMsgStyle = lipgloss.NewStyle().
			Foreground(errorColor)

	inputStyle = lipgloss.NewStyle().
			Foreground(baseColor)

	stepDoneStyle = lipgloss.NewStyle().
			Foreground(successColor)

	stepPendingStyle = lipgloss.NewStyle().
			Foreground(mutedColor)

	stepCurrentStyle = lipgloss.NewStyle().
			Foreground(baseColor).
			Bold(true)

	stepErrorStyle = lipgloss.NewStyle().
			Foreground(errorColor)

	statusBarStyle = lipgloss.NewStyle().
			Background(bgDark).
			Foreground(lipgloss.Color("#A0A0B0")).
			Padding(0, 1)

	confirmBoxStyle = lipgloss.NewStyle().
				Border(lipgloss.RoundedBorder()).
				BorderForeground(baseColor).
				Background(bgCard).
				Foreground(lipgloss.Color("#FFFFFF")).
				Padding(1, 3).
				Bold(true)

	confirmYesStyle = lipgloss.NewStyle().
			Foreground(successColor).
			Bold(true)

	confirmNoStyle = lipgloss.NewStyle().
			Foreground(mutedColor)
)

type aiResponseMsg struct{ content string }
type aiErrMsg struct{ err error }
type scanCompleteMsg struct{ result *scanner.ScanResult }
type installCompleteMsg struct{ results []installer.InstallResult }
type installProgressMsg struct {
	tool    string
	current int
	total   int
}
type updateCheckMsg struct{ statuses []updater.UpdateStatus }
type previewReadyMsg struct{ url string }
type workflowPhaseMsg struct{ phase workflow.Phase }

type daemonLogMsg struct{ logs []string }
type lspScanMsg struct{ servers []lsp.LSPServer }
type mcpConfigMsg struct{ err error }

type skillsListMsg struct{ skills []skills.Skill }

type spinnerTickMsg struct{ time time.Time }

type termOutputMsg struct{ line string }
type termExitMsg struct{}

type Model struct {
	config        *config.MuyueConfig
	scanResult    *scanner.ScanResult
	activeTab     tab
	width         int
	height        int
	viewport      viewport.Model
	ready         bool
	chatInput     string
	chatLog       []string
	chatLoading   bool
	orch          *orchestrator.Orchestrator
	proxyMgr      *proxy.Manager
	updateStatus  []updater.UpdateStatus
	installLog    []string
	previewURL    string
	previewSrv    *preview.PreviewServer
	daemon        *daemon.Daemon
	lspServers    []lsp.LSPServer
	mcpConfigured bool
	skillList     []skills.Skill

	helpModel   help.Model
	progressBar progress.Model
	spinner     spinner.Model

	showingQuit    bool
	confirmCursor  int
	showingTabMenu bool
	tabMenuCursor  int

	ctrlCCount int
	lastCtrlC  time.Time

	installing     bool
	installCurrent int
	installTotal   int
	installTool    string

	termCmd    *exec.Cmd
	termInput  string
	termLog    []string
	termRunning bool
	termCwd    string
}

type keyMap struct {
	Tab       key.Binding
	Prev      key.Binding
	Quit      key.Binding
	Confirm   key.Binding
	Cancel    key.Binding
	TabMenu   key.Binding
	Install   key.Binding
	Update    key.Binding
	Scan      key.Binding
	Enter     key.Binding
	Backspace key.Binding
}

var keys = keyMap{
	Tab: key.NewBinding(
		key.WithKeys("tab"),
		key.WithHelp("tab", "indent"),
	),
	Prev: key.NewBinding(
		key.WithKeys("shift+tab"),
		key.WithHelp("shift+tab", "unindent"),
	),
	Quit: key.NewBinding(
		key.WithKeys("ctrl+c"),
		key.WithHelp("ctrl+c", "quit"),
	),
	Confirm: key.NewBinding(
		key.WithKeys("y"),
		key.WithHelp("y", "yes"),
	),
	Cancel: key.NewBinding(
		key.WithKeys("n", "esc"),
		key.WithHelp("n/esc", "no"),
	),
	TabMenu: key.NewBinding(
		key.WithKeys("ctrl+t"),
		key.WithHelp("ctrl+t", "switch tab"),
	),
	Install: key.NewBinding(
		key.WithKeys("i"),
		key.WithHelp("i", "install"),
	),
	Update: key.NewBinding(
		key.WithKeys("u"),
		key.WithHelp("u", "update"),
	),
	Scan: key.NewBinding(
		key.WithKeys("s"),
		key.WithHelp("s", "scan"),
	),
	Enter: key.NewBinding(
		key.WithKeys("enter"),
		key.WithHelp("enter", "send"),
	),
	Backspace: key.NewBinding(
		key.WithKeys("backspace"),
		key.WithHelp("backspace", "delete"),
	),
}

func (k keyMap) ShortHelp() []key.Binding {
	return []key.Binding{k.TabMenu, k.Tab, k.Quit}
}

func (k keyMap) FullHelp() [][]key.Binding {
	return [][]key.Binding{
		{k.TabMenu, k.Tab, k.Prev},
		{k.Quit},
	}
}

func NewModel(cfg *config.MuyueConfig, scan *scanner.ScanResult) Model {
	orch, _ := orchestrator.New(cfg)
	proxyMgr := proxy.NewManager()
	d := daemon.NewDaemon(cfg, 1*time.Hour)

	lspServers := lsp.ScanServers()

	skillList, _ := skills.List()

	mcpConfigured := false
	if err := mcp.ConfigureAll(cfg); err == nil {
		mcpConfigured = true
	}

	if cfg.Profile.Preferences.AutoUpdate {
		d.Start()
	}

	sp := spinner.New()
	sp.Spinner = spinner.Dot
	sp.Style = lipgloss.NewStyle().Foreground(baseColor)

	prog := progress.New(progress.WithGradient("#FF6B9D", "#A0D2FF"))

	cwd, _ := os.Getwd()

	return Model{
		config:        cfg,
		scanResult:    scan,
		activeTab:     tabDashboard,
		chatLog: []string{
			aiMsgStyle.Render("muyue: Welcome! I'm your AI development environment assistant."),
			aiMsgStyle.Render("muyue: Type /plan <goal> to start a structured workflow, or just chat."),
		},
		orch:           orch,
		proxyMgr:       proxyMgr,
		chatInput:      "",
		chatLoading:    false,
		daemon:         d,
		lspServers:     lspServers,
		mcpConfigured:  mcpConfigured,
		skillList:      skillList,
		helpModel:      help.New(),
		progressBar:    prog,
		spinner:        sp,
		showingQuit:    false,
		confirmCursor:  1,
		showingTabMenu: false,
		tabMenuCursor:  0,
		termCwd:        cwd,
	}
}

func (m Model) Init() tea.Cmd {
	return tea.Batch(spinner.Tick, tea.EnterAltScreen)
}

func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	switch msg := msg.(type) {
	case tea.KeyMsg:
		return m.handleKey(msg)
	case spinner.TickMsg:
		var cmd tea.Cmd
		m.spinner, cmd = m.spinner.Update(msg)
		return m, cmd
	case progress.FrameMsg:
		pm, cmd := m.progressBar.Update(msg)
		m.progressBar = pm.(progress.Model)
		return m, cmd
	case termOutputMsg:
		m.termLog = append(m.termLog, msg.line)
		if m.activeTab == tabTerminal {
			m.viewport.SetContent(m.renderContent())
			m.viewport.GotoBottom()
		}
		return m, nil
	case termExitMsg:
		m.termRunning = false
		m.termLog = append(m.termLog, lipgloss.NewStyle().Foreground(mutedColor).Render("(process exited)"))
		m.termCmd = nil
		if m.activeTab == tabTerminal {
			m.viewport.SetContent(m.renderContent())
		}
		return m, nil
	case aiResponseMsg:
		m.chatLoading = false
		content := msg.content
		m.chatLog = append(m.chatLog, aiMsgStyle.Render("muyue: "+content))

		if m.orch != nil && m.orch.Workflow != nil {
			previewFiles := workflow.ParsePreviewFiles(content)
			if len(previewFiles) > 0 {
				m.handlePreview(previewFiles)
			}
		}

		m.viewport.SetContent(m.renderContent())
		m.viewport.GotoBottom()
		return m, nil
	case aiErrMsg:
		m.chatLoading = false
		m.chatLog = append(m.chatLog, errMsgStyle.Render("error: "+msg.err.Error()))
		m.viewport.SetContent(m.renderContent())
		m.viewport.GotoBottom()
		return m, nil
	case scanCompleteMsg:
		m.scanResult = msg.result
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case installCompleteMsg:
		m.installing = false
		for _, r := range msg.results {
			status := itemOKStyle.Render("[OK]")
			if !r.Success {
				status = itemMissingStyle.Render("[FAIL]")
			}
			m.installLog = append(m.installLog, fmt.Sprintf("  %s %s: %s", status, r.Tool, r.Message))
		}
		m.scanResult = scanner.ScanSystem()
		m.progressBar.SetPercent(1)
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case installProgressMsg:
		status := itemOKStyle.Render("[OK]")
		m.installLog = append(m.installLog, fmt.Sprintf("  %s %s installed", status, msg.tool))
		m.installCurrent = msg.current
		m.installTool = ""
		pct := float64(msg.current) / float64(max(msg.total, 1))
		m.progressBar.SetPercent(pct)
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case installBatchMsg:
		status := itemOKStyle.Render("[OK]")
		if !msg.result.Success {
			status = itemMissingStyle.Render("[FAIL]")
		}
		m.installLog = append(m.installLog, fmt.Sprintf("  %s %s: %s", status, msg.result.Tool, msg.result.Message))
		m.installCurrent = msg.index + 1
		m.installTotal = len(msg.tools)
		pct := float64(m.installCurrent) / float64(max(m.installTotal, 1))
		m.progressBar.SetPercent(pct)
		if msg.index+1 < len(msg.tools) {
			m.installTool = msg.tools[msg.index+1]
			m.viewport.SetContent(m.renderContent())
			return m, startInstallCmd(msg.config, msg.tools, msg.index+1)
		}
		m.installing = false
		m.scanResult = scanner.ScanSystem()
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case updateCheckMsg:
		m.updateStatus = msg.statuses
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case previewReadyMsg:
		m.previewURL = msg.url
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case lspScanMsg:
		m.lspServers = msg.servers
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case mcpConfigMsg:
		if msg.err == nil {
			m.mcpConfigured = true
		}
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case daemonLogMsg:
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case tea.WindowSizeMsg:
		m.width = msg.Width
		m.height = msg.Height
		m.helpModel.Width = msg.Width
		headerH := 1
		footerH := 2
		inputH := 0
		if m.activeTab == tabChat || m.activeTab == tabWorkflow {
			inputH = 2
		}
		if m.activeTab == tabTerminal {
			inputH = 2
		}
		contentH := msg.Height - headerH - footerH - inputH
		if contentH < 1 {
			contentH = 1
		}
		m.viewport = viewport.New(msg.Width, contentH)
		m.viewport.Width = msg.Width
		m.viewport.Height = contentH
		m.progressBar.Width = msg.Width - 20
		m.ready = true
		m.viewport.SetContent(m.renderContent())
		return m, nil
	}
	return m, nil
}

func (m Model) handleKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	if m.showingQuit {
		return m.handleQuitConfirm(msg)
	}
	if m.showingTabMenu {
		return m.handleTabMenu(msg)
	}

	if m.activeTab == tabTerminal {
		return m.handleTerminalKey(msg)
	}

	switch msg.String() {
	case "ctrl+c":
		now := time.Now()
		if m.ctrlCCount > 0 && now.Sub(m.lastCtrlC) < 2*time.Second {
			return m, tea.Quit
		}
		m.ctrlCCount++
		m.lastCtrlC = now
		m.showingQuit = true
		m.confirmCursor = 1
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case "ctrl+t":
		m.showingTabMenu = true
		m.tabMenuCursor = int(m.activeTab)
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case "enter":
		if (m.activeTab == tabChat || m.activeTab == tabWorkflow) && m.chatInput != "" && !m.chatLoading {
			return m.handleChatSubmit()
		}
	case "backspace":
		if (m.activeTab == tabChat || m.activeTab == tabWorkflow) && len(m.chatInput) > 0 {
			m.chatInput = m.chatInput[:len(m.chatInput)-1]
			m.viewport.SetContent(m.renderContent())
		}
	default:
		if (m.activeTab == tabChat || m.activeTab == tabWorkflow) && len(msg.String()) == 1 && !m.chatLoading {
			m.chatInput += msg.String()
			m.viewport.SetContent(m.renderContent())
		}
	}

	if m.activeTab == tabDashboard {
		return m.handleDashboardKey(msg)
	}
	if m.activeTab == tabAgents {
		return m.handleAgentsKey(msg)
	}
	if m.activeTab == tabWorkflow {
		return m.handleWorkflowKey(msg)
	}

	return m, nil
}

func (m Model) handleTerminalKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch msg.String() {
	case "ctrl+c":
		if m.termCmd != nil && m.termCmd.Process != nil {
			m.termCmd.Process.Kill()
			m.termRunning = false
			m.termLog = append(m.termLog, lipgloss.NewStyle().Foreground(errorColor).Render("^C"))
			m.termCmd = nil
			m.viewport.SetContent(m.renderContent())
			return m, nil
		}
		now := time.Now()
		if m.ctrlCCount > 0 && now.Sub(m.lastCtrlC) < 2*time.Second {
			return m, tea.Quit
		}
		m.ctrlCCount++
		m.lastCtrlC = now
		m.showingQuit = true
		m.confirmCursor = 1
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case "ctrl+t":
		m.showingTabMenu = true
		m.tabMenuCursor = int(m.activeTab)
		return m, nil
	case "enter":
		if m.termRunning {
			return m, nil
		}
		input := strings.TrimSpace(m.termInput)
		m.termInput = ""
		if input == "" {
			return m, nil
		}
		if input == "exit" || input == "quit" {
			return m, nil
		}
		if input == "clear" {
			m.termLog = nil
			m.viewport.SetContent(m.renderContent())
			return m, nil
		}
		if strings.HasPrefix(input, "cd ") {
			dir := strings.TrimPrefix(input, "cd ")
			dir = strings.TrimSpace(dir)
			if dir == "~" {
				home, _ := os.UserHomeDir()
				dir = home
			}
			if err := os.Chdir(dir); err == nil {
				m.termCwd, _ = os.Getwd()
				m.termLog = append(m.termLog, lipgloss.NewStyle().Foreground(dimColor).Render(m.termCwd+" $ "+input))
			} else {
				m.termLog = append(m.termLog, errMsgStyle.Render("cd: "+err.Error()))
			}
			m.viewport.SetContent(m.renderContent())
			m.viewport.GotoBottom()
			return m, nil
		}
		m.termLog = append(m.termLog, lipgloss.NewStyle().Foreground(dimColor).Render(m.termCwd+" $ ")+input)
		m.viewport.SetContent(m.renderContent())
		m.viewport.GotoBottom()
		return m, m.runTermCommand(input)
	case "backspace":
		if len(m.termInput) > 0 {
			m.termInput = m.termInput[:len(m.termInput)-1]
			m.viewport.SetContent(m.renderContent())
		}
		return m, nil
	case "tab":
		if m.activeTab == tabChat || m.activeTab == tabWorkflow {
			m.chatInput += "\t"
			m.viewport.SetContent(m.renderContent())
		}
	default:
		if len(msg.String()) == 1 {
			m.termInput += msg.String()
			m.viewport.SetContent(m.renderContent())
		}
	}
	return m, nil
}

func (m Model) runTermCommand(input string) tea.Cmd {
	return tea.Cmd(func() tea.Msg {
		shell := os.Getenv("SHELL")
		if shell == "" {
			shell = "/bin/sh"
		}
		cmd := exec.Command(shell, "-c", input)
		cmd.Dir = m.termCwd
		out, err := cmd.CombinedOutput()
		if err != nil {
			return termOutputMsg{line: string(out) + errMsgStyle.Render(err.Error())}
		}
		return termOutputMsg{line: string(out)}
	})
}

func (m Model) handleQuitConfirm(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch msg.String() {
	case "y", "Y", "o", "O":
		m.showingQuit = false
		return m, tea.Quit
	case "n", "N", "esc":
		m.showingQuit = false
		m.ctrlCCount = 0
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case "left", "h":
		m.confirmCursor = 0
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case "right", "l":
		m.confirmCursor = 1
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case "enter":
		if m.confirmCursor == 0 {
			m.showingQuit = false
			return m, tea.Quit
		}
		m.showingQuit = false
		m.ctrlCCount = 0
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case "ctrl+c":
		m.showingQuit = false
		return m, tea.Quit
	}
	return m, nil
}

func (m Model) handleTabMenu(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch msg.String() {
	case "ctrl+c", "esc":
		m.showingTabMenu = false
		m.viewport.SetContent(m.renderContent())
		return m, nil
	case "up", "k":
		if m.tabMenuCursor > 0 {
			m.tabMenuCursor--
		}
		return m, nil
	case "down", "j":
		if m.tabMenuCursor < int(tabCount)-1 {
			m.tabMenuCursor++
		}
		return m, nil
	case "enter":
		m.activeTab = tab(m.tabMenuCursor)
		m.showingTabMenu = false
		m.resizeViewport()
		return m, nil
	default:
		for i := 0; i < int(tabCount); i++ {
			if msg.String() == fmt.Sprintf("%d", i+1) {
				m.activeTab = tab(i)
				m.showingTabMenu = false
				m.resizeViewport()
				return m, nil
			}
		}
	}
	return m, nil
}

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

	tabItemStyle := lipgloss.NewStyle().
		Foreground(lipgloss.Color("#A0A0B0")).
		Padding(0, 2)

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

	tabNumStyle := lipgloss.NewStyle().
		Foreground(dimColor).
		Width(4)

	var items []string
	descs := []string{"system overview & tools", "AI chat & conversation", "plan & execute workflows", "integrated shell", "background AI agents", "profile & settings"}

	for i, name := range tabNames {
		num := tabNumStyle.Render(fmt.Sprintf(" %d.", i+1))
		if i == m.tabMenuCursor {
			item := fmt.Sprintf("%s %-12s %s", num, name, lipgloss.NewStyle().Foreground(mutedColor).Render(descs[i]))
			items = append(items, tabItemActiveStyle.Render(">"+item))
		} else {
			item := fmt.Sprintf("%s %-12s %s", num, name, lipgloss.NewStyle().Foreground(dimColor).Render(descs[i]))
			items = append(items, tabItemStyle.Render(" "+item))
		}
	}

	content := lipgloss.NewStyle().Foreground(accentColor).Bold(true).Render("Switch Tab") +
		"\n\n" +
		strings.Join(items, "\n") +
		"\n\n" +
		lipgloss.NewStyle().Foreground(dimColor).Render("up/down navigate  enter/select  esc cancel")

	box := tabMenuStyle.Render(content)

	return lipgloss.Place(m.width, m.height,
		0.5, 0.5,
		box,
		lipgloss.WithWhitespaceBackground(bgPanel),
		lipgloss.WithWhitespaceForeground(dimColor),
	)
}

func (m Model) handleChatSubmit() (tea.Model, tea.Cmd) {
	input := m.chatInput
	m.chatLog = append(m.chatLog, userMsgStyle.Render("you: "+input))
	m.chatInput = ""
	m.chatLoading = true
	m.viewport.SetContent(m.renderContent())
	m.viewport.GotoBottom()

	if strings.HasPrefix(input, "/plan ") {
		goal := strings.TrimPrefix(input, "/plan ")
		return m, startWorkflowCmd(m.orch, goal)
	}

	if m.orch != nil && m.orch.Workflow != nil && m.orch.Workflow.Phase != workflow.PhaseIdle {
		return m, workflowChatCmd(m.orch, input)
	}

	return m, sendAIMessage(m.orch, input)
}

func (m Model) handleDashboardKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch msg.String() {
	case "i":
		if m.installing {
			return m, nil
		}
		var missing []string
		if m.scanResult != nil {
			for _, t := range m.scanResult.Tools {
				if !t.Installed {
					missing = append(missing, t.Name)
				}
			}
		}
		if len(missing) == 0 {
			m.installLog = append(m.installLog, itemOKStyle.Render("All tools already installed!"))
			m.viewport.SetContent(m.renderContent())
			return m, nil
		}
		needsSudo := checkNeedsSudo(m.scanResult)
		if needsSudo && !hasSudo() {
			m.installLog = append(m.installLog, errMsgStyle.Render("Some tools require sudo. Run: sudo muyue install"))
			m.viewport.SetContent(m.renderContent())
			return m, nil
		}
		m.installing = true
		m.installCurrent = 0
		m.installTotal = len(missing)
		m.installTool = missing[0]
		m.progressBar.SetPercent(0)
		m.viewport.SetContent(m.renderContent())
		return m, startInstallCmd(m.config, missing, 0)
	case "u":
		return m, tea.Cmd(func() tea.Msg {
			result := scanner.ScanSystem()
			return updateCheckMsg{statuses: updater.CheckUpdates(result)}
		})
	case "s":
		return m, tea.Cmd(func() tea.Msg {
			return scanCompleteMsg{result: scanner.ScanSystem()}
		})
	case "l":
		return m, tea.Cmd(func() tea.Msg {
			servers := lsp.ScanServers()
			return lspScanMsg{servers: servers}
		})
	case "m":
		return m, tea.Cmd(func() tea.Msg {
			err := mcp.ConfigureAll(m.config)
			return mcpConfigMsg{err: err}
		})
	}
	return m, nil
}

func (m Model) handleAgentsKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch msg.String() {
	case "c":
		if m.proxyMgr.IsAvailable(proxy.AgentCrush) {
			m.proxyMgr.Start(proxy.AgentCrush)
		}
		m.viewport.SetContent(m.renderContent())
	case "l":
		if m.proxyMgr.IsAvailable(proxy.AgentClaude) {
			m.proxyMgr.Start(proxy.AgentClaude)
		}
		m.viewport.SetContent(m.renderContent())
	}
	return m, nil
}

func (m Model) handleWorkflowKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	if m.orch == nil || m.orch.Workflow == nil {
		return m, nil
	}

	wf := m.orch.Workflow

	switch msg.String() {
	case "a":
		if wf.Phase == workflow.PhaseReviewing {
			m.chatLog = append(m.chatLog, userMsgStyle.Render("you: [Plan approved]"))
			m.chatLoading = true
			m.viewport.SetContent(m.renderContent())
			return m, reviewPlanCmd(m.orch, true, "")
		}
	case "r":
		if wf.Phase == workflow.PhaseReviewing {
			m.chatInput = ""
			m.chatLog = append(m.chatLog, itemWarnStyle.Render("Type your rejection feedback below:"))
			m.viewport.SetContent(m.renderContent())
		}
	case "g":
		if wf.Phase == workflow.PhaseGathering && len(wf.Plan.Questions) > 0 && len(wf.Plan.Answers) >= len(wf.Plan.Questions) {
			m.chatLog = append(m.chatLog, userMsgStyle.Render("you: [Generate plan]"))
			m.chatLoading = true
			m.viewport.SetContent(m.renderContent())
			return m, generatePlanCmd(m.orch)
		}
	case "n":
		if wf.Phase == workflow.PhaseExecuting {
			current := wf.CurrentStep()
			if current != nil {
				m.chatLoading = true
				m.viewport.SetContent(m.renderContent())
				return m, continueWorkflowCmd(m.orch, "proceeding")
			}
		}
	case "x":
		wf.Reset()
		m.chatLog = append(m.chatLog, itemWarnStyle.Render("Workflow reset."))
		m.viewport.SetContent(m.renderContent())
	}
	return m, nil
}

func (m *Model) handlePreview(files []workflow.PreviewFile) {
	dir := filepath.Join(os.TempDir(), "muyue-preview")
	os.RemoveAll(dir)
	os.MkdirAll(dir, 0755)

	for _, f := range files {
		preview.CreatePreviewFile(dir, f.Filename, f.Content)
	}

	if m.previewSrv != nil {
		m.previewSrv.Stop()
	}
	m.previewSrv = preview.NewPreviewServer(dir)
	if err := m.previewSrv.Start(8765); err != nil {
		m.chatLog = append(m.chatLog, errMsgStyle.Render("preview error: "+err.Error()))
	} else {
		m.previewURL = "http://127.0.0.1:8765"
		m.chatLog = append(m.chatLog, itemOKStyle.Render("Preview opened in browser: http://127.0.0.1:8765"))
	}
}

func (m *Model) resizeViewport() {
	headerH := 1
	footerH := 2
	inputH := 0
	if m.activeTab == tabChat || m.activeTab == tabWorkflow {
		inputH = 2
	}
	if m.activeTab == tabTerminal {
		inputH = 2
	}
	contentH := m.height - headerH - footerH - inputH
	if contentH < 1 {
		contentH = 1
	}
	m.viewport = viewport.New(m.width, contentH)
	m.viewport.Width = m.width
	m.viewport.Height = contentH
	m.viewport.SetContent(m.renderContent())
}

func checkNeedsSudo(scan *scanner.ScanResult) bool {
	if scan == nil {
		return false
	}
	sudoTools := map[string]bool{
		"docker": true, "git": true, "gh": true, "node": true, "python": true,
	}
	for _, t := range scan.Tools {
		if !t.Installed && sudoTools[t.Name] {
			return true
		}
	}
	return false
}

func hasSudo() bool {
	if os.Geteuid() == 0 {
		return true
	}
	if _, err := exec.LookPath("sudo"); err == nil {
		return true
	}
	if _, err := exec.LookPath("pkexec"); err == nil {
		return true
	}
	return false
}

func startInstallCmd(cfg *config.MuyueConfig, tools []string, index int) tea.Cmd {
	return tea.Cmd(func() tea.Msg {
		inst := installer.New(cfg)
		result := inst.InstallTool(tools[index])

		if index+1 < len(tools) {
			return installBatchMsg{
				result: result,
				tools:  tools,
				index:  index,
				config: cfg,
			}
		}
		return installCompleteMsg{results: []installer.InstallResult{result}}
	})
}

type installBatchMsg struct {
	result installer.InstallResult
	tools  []string
	index  int
	config *config.MuyueConfig
}

func sendAIMessage(orch *orchestrator.Orchestrator, input string) tea.Cmd {
	return tea.Cmd(func() tea.Msg {
		if orch == nil {
			return aiErrMsg{err: fmt.Errorf("orchestrator not configured")}
		}
		resp, err := orch.Send(input)
		if err != nil {
			return aiErrMsg{err: err}
		}
		return aiResponseMsg{content: resp}
	})
}

func startWorkflowCmd(orch *orchestrator.Orchestrator, goal string) tea.Cmd {
	return tea.Cmd(func() tea.Msg {
		resp, err := orch.StartWorkflow(goal)
		if err != nil {
			return aiErrMsg{err: err}
		}
		return aiResponseMsg{content: resp}
	})
}

func workflowChatCmd(orch *orchestrator.Orchestrator, input string) tea.Cmd {
	return tea.Cmd(func() tea.Msg {
		wf := orch.Workflow
		switch wf.Phase {
		case workflow.PhaseGathering:
			resp, err := orch.AnswerQuestion(input)
			if err != nil {
				return aiErrMsg{err: err}
			}
			return aiResponseMsg{content: resp}
		case workflow.PhaseReviewing:
			approved, feedback := workflow.ParseApproval(input)
			resp, err := orch.ReviewPlan(approved, feedback)
			if err != nil {
				return aiErrMsg{err: err}
			}
			return aiResponseMsg{content: resp}
		default:
			resp, err := orch.Send(input)
			if err != nil {
				return aiErrMsg{err: err}
			}
			return aiResponseMsg{content: resp}
		}
	})
}

func generatePlanCmd(orch *orchestrator.Orchestrator) tea.Cmd {
	return tea.Cmd(func() tea.Msg {
		resp, err := orch.GeneratePlan()
		if err != nil {
			return aiErrMsg{err: err}
		}
		return aiResponseMsg{content: resp}
	})
}

func reviewPlanCmd(orch *orchestrator.Orchestrator, approved bool, feedback string) tea.Cmd {
	return tea.Cmd(func() tea.Msg {
		resp, err := orch.ReviewPlan(approved, feedback)
		if err != nil {
			return aiErrMsg{err: err}
		}
		return aiResponseMsg{content: resp}
	})
}

func continueWorkflowCmd(orch *orchestrator.Orchestrator, output string) tea.Cmd {
	return tea.Cmd(func() tea.Msg {
		resp, err := orch.ContinueExecution(output)
		if err != nil {
			return aiErrMsg{err: err}
		}
		return aiResponseMsg{content: resp}
	})
}

func (m Model) View() string {
	if !m.ready {
		return "Loading..."
	}

	if m.showingQuit {
		return m.renderQuitOverlay()
	}

	if m.showingTabMenu {
		return m.renderTabMenuOverlay()
	}

	var b strings.Builder
	b.WriteString(m.renderHeader())
	b.WriteString("\n")
	b.WriteString(m.viewport.View())
	if m.activeTab == tabChat || m.activeTab == tabWorkflow {
		b.WriteString("\n")
		b.WriteString(m.renderChatInput())
	}
	if m.activeTab == tabTerminal {
		b.WriteString("\n")
		b.WriteString(m.renderTermInput())
	}
	b.WriteString("\n")
	b.WriteString(m.renderFooter())

	return b.String()
}

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

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

	content := confirmBoxStyle.Render(box)

	return lipgloss.Place(m.width, m.height,
		0.5, 0.5,
		content,
		lipgloss.WithWhitespaceBackground(bgDark),
		lipgloss.WithWhitespaceForeground(dimColor),
	)
}

func (m Model) renderHeader() string {
	logoStyle := lipgloss.NewStyle().Foreground(baseColor).Bold(true)
	badgeStyle := lipgloss.NewStyle().
		Background(baseColor).
		Foreground(lipgloss.Color("#FFFFFF")).
		Padding(0, 1)

	logo := logoStyle.Render("muyue")
	badge := badgeStyle.Render("v" + version.Version)

	activeTabName := lipgloss.NewStyle().Foreground(accentColor).Bold(true).Render(tabNames[m.activeTab])
	separator := lipgloss.NewStyle().Foreground(dimColor).Render(" · ")

	rightPart := separator + activeTabName

	line := lipgloss.NewStyle().Background(bgDark).Padding(0, 1).Render(
		lipgloss.JoinHorizontal(lipgloss.Center, logo, " ", badge, rightPart),
	)

	return line
}

func (m Model) renderContent() string {
	switch m.activeTab {
	case tabDashboard:
		return m.renderDashboard()
	case tabChat:
		return m.renderChat()
	case tabWorkflow:
		return m.renderWorkflow()
	case tabTerminal:
		return m.renderTerminal()
	case tabAgents:
		return m.renderAgents()
	case tabConfig:
		return m.renderConfig()
	default:
		return ""
	}
}

func (m Model) renderTerminal() string {
	var b strings.Builder

	b.WriteString(sectionStyle.Render("Terminal"))
	b.WriteString("  ")
	b.WriteString(lipgloss.NewStyle().Foreground(dimColor).Render(m.termCwd))
	b.WriteString("\n\n")

	for _, line := range m.termLog {
		b.WriteString(line + "\n")
	}

	return b.String()
}

func (m Model) renderTermInput() string {
	prompt := lipgloss.NewStyle().Foreground(successColor).Render("$ ")
	return prompt + m.termInput + lipgloss.NewStyle().Foreground(baseColor).Render("")
}

func (m Model) renderDashboard() string {
	colWidth := m.width / 2
	if colWidth < 30 {
		colWidth = 30
	}

	var left, right strings.Builder

	left.WriteString(sectionStyle.Render("System"))
	left.WriteString("\n")
	if m.scanResult != nil {
		sysInfo := m.scanResult.System.String()
		left.WriteString("  ")
		left.WriteString(lipgloss.NewStyle().Foreground(lipgloss.Color("#E0E0E0")).Render(sysInfo))
	}
	left.WriteString("\n\n")

	left.WriteString(sectionStyle.Render("Tools"))
	left.WriteString("\n")
	if m.scanResult != nil {
		installed := 0
		total := len(m.scanResult.Tools)
		for _, t := range m.scanResult.Tools {
			if t.Installed {
				installed++
				left.WriteString("  ")
				left.WriteString(itemOKStyle.Render("  "))
				left.WriteString(fmt.Sprintf(" %-12s %s\n", t.Name, extractVersion(t.Version)))
			} else {
				left.WriteString("  ")
				left.WriteString(itemMissingStyle.Render("  "))
				left.WriteString(fmt.Sprintf(" %-12s %s\n", t.Name, itemPendingStyle.Render("(not installed)")))
			}
		}
		barWidth := 20
		pct := 0
		if total > 0 {
			pct = (installed * barWidth) / total
		}
		bar := lipgloss.NewStyle().Foreground(successColor).Render(strings.Repeat("█", pct)) +
			lipgloss.NewStyle().Foreground(dimColor).Render(strings.Repeat("░", barWidth-pct))
		left.WriteString(fmt.Sprintf("\n  %s %d/%d\n", bar, installed, total))
	}
	left.WriteString("\n")

	if m.installing {
		left.WriteString(sectionStyle.Render("Installing..."))
		left.WriteString("\n")
		progBar := m.progressBar.View()
		label := ""
		if m.installTool != "" {
			label = fmt.Sprintf(" %d/%d - %s", m.installCurrent+1, m.installTotal, m.installTool)
		} else {
			label = fmt.Sprintf(" %d/%d", m.installCurrent, m.installTotal)
		}
		left.WriteString(fmt.Sprintf("  %s%s\n", progBar, label))
		left.WriteString("\n")
	}

	if len(m.installLog) > 0 {
		left.WriteString(sectionStyle.Render("Install Log"))
		left.WriteString("\n")
		for _, l := range m.installLog {
			left.WriteString(l + "\n")
		}
		left.WriteString("\n")
	}

	right.WriteString(sectionStyle.Render("Quick Actions"))
	right.WriteString("\n")
	actions := []struct {
		key  string
		desc string
	}{
		{"i", "Install missing tools"},
		{"u", "Check for updates"},
		{"s", "Rescan system"},
		{"l", "Scan LSP servers"},
		{"m", "Configure MCP servers"},
	}
	for _, a := range actions {
		right.WriteString(fmt.Sprintf("  %s %s\n",
			lipgloss.NewStyle().Foreground(baseColor).Bold(true).Render("["+a.key+"]"),
			a.desc))
	}
	right.WriteString("\n")

	if len(m.updateStatus) > 0 {
		right.WriteString(sectionStyle.Render("Updates"))
		right.WriteString("\n")
		for _, s := range m.updateStatus {
			if s.NeedsUpdate {
				right.WriteString("  ")
				right.WriteString(itemWarnStyle.Render(" "))
				right.WriteString(fmt.Sprintf(" %s: %s -> %s\n", s.Tool, s.Current, s.Latest))
			} else if s.Error == "" {
				right.WriteString("  ")
				right.WriteString(itemOKStyle.Render(" "))
				right.WriteString(fmt.Sprintf(" %s: up to date\n", s.Tool))
			}
		}
		right.WriteString("\n")
	}

	if len(m.lspServers) > 0 {
		right.WriteString(sectionStyle.Render("LSP Servers"))
		right.WriteString("\n")
		lspInstalled := 0
		for _, s := range m.lspServers {
			if s.Installed {
				lspInstalled++
				right.WriteString("  ")
				right.WriteString(itemOKStyle.Render(" "))
				right.WriteString(fmt.Sprintf(" %-22s (%s)\n", s.Name, s.Language))
			} else {
				right.WriteString("  ")
				right.WriteString(itemPendingStyle.Render(" "))
				right.WriteString(fmt.Sprintf(" %-22s (%s)\n", s.Name, s.Language))
			}
		}
		right.WriteString(fmt.Sprintf("\n  Installed: %d/%d\n", lspInstalled, len(m.lspServers)))
		right.WriteString("\n")
	}

	if m.daemon != nil {
		right.WriteString(sectionStyle.Render("Daemon"))
		right.WriteString("\n")
		if m.daemon.IsRunning() {
			right.WriteString("  ")
			right.WriteString(itemOKStyle.Render("running"))
			lastCheck := m.daemon.LastCheck()
			if !lastCheck.IsZero() {
				right.WriteString(fmt.Sprintf("  last: %s", lastCheck.Format("15:04:05")))
			}
		} else {
			right.WriteString("  ")
			right.WriteString(itemPendingStyle.Render("stopped"))
		}
		right.WriteString("\n\n")
	}

	mcpStatus := itemPendingStyle.Render("not configured")
	if m.mcpConfigured {
		mcpStatus = itemOKStyle.Render("configured")
	}
	right.WriteString(fmt.Sprintf("MCP: %s\n", mcpStatus))

	leftCol := lipgloss.NewStyle().Width(colWidth).Render(left.String())
	rightCol := lipgloss.NewStyle().Width(colWidth).Render(right.String())

	return lipgloss.JoinHorizontal(lipgloss.Top, leftCol, rightCol)
}

func (m Model) renderChat() string {
	var b strings.Builder

	header := sectionStyle.Render("Chat")
	header += " "
	header += lipgloss.NewStyle().Foreground(mutedColor).Render("(" + m.config.Profile.Preferences.DefaultAI + ")")
	if m.chatLoading {
		header += "  " + m.spinner.View() + lipgloss.NewStyle().Foreground(warningColor).Render("thinking...")
	}
	b.WriteString(header)
	b.WriteString("\n\n")

	separator := lipgloss.NewStyle().Foreground(dimColor).Render(strings.Repeat("─", max(m.width-4, 10)))
	b.WriteString(separator)
	b.WriteString("\n\n")

	for _, msg := range m.chatLog {
		b.WriteString(msg)
		b.WriteString("\n\n")
	}

	if m.previewURL != "" {
		b.WriteString(itemOKStyle.Render(fmt.Sprintf("Preview: %s", m.previewURL)))
		b.WriteString("\n\n")
	}

	return b.String()
}

func (m Model) renderChatInput() string {
	if m.chatLoading {
		return inputStyle.Render("> ") + m.spinner.View() + lipgloss.NewStyle().Foreground(mutedColor).Render(" waiting for response...")
	}
	cursor := lipgloss.NewStyle().Foreground(baseColor).Render("")
	return inputStyle.Render("> ") + m.chatInput + cursor
}

func (m Model) renderWorkflow() string {
	var b strings.Builder

	if m.orch == nil || m.orch.Workflow == nil {
		b.WriteString("Workflow engine not available.")
		return b.String()
	}

	wf := m.orch.Workflow

	b.WriteString(sectionStyle.Render("Workflow"))
	b.WriteString("  ")

	phaseColors := map[workflow.Phase]lipgloss.Style{
		workflow.PhaseIdle:      lipgloss.NewStyle().Foreground(mutedColor),
		workflow.PhaseGathering: lipgloss.NewStyle().Foreground(warningColor).Bold(true),
		workflow.PhasePlanning:  lipgloss.NewStyle().Foreground(accentColor).Bold(true),
		workflow.PhaseReviewing: lipgloss.NewStyle().Foreground(aiColor).Bold(true),
		workflow.PhaseExecuting: lipgloss.NewStyle().Foreground(baseColor).Bold(true),
		workflow.PhaseDone:      lipgloss.NewStyle().Foreground(successColor).Bold(true),
		workflow.PhaseError:     lipgloss.NewStyle().Foreground(errorColor).Bold(true),
	}

	if style, ok := phaseColors[wf.Phase]; ok {
		b.WriteString(style.Render(string(wf.Phase)))
	}
	b.WriteString("\n\n")

	if wf.Plan.Goal != "" {
		b.WriteString(fmt.Sprintf("Goal: %s\n\n", wf.Plan.Goal))
	}

	switch wf.Phase {
	case workflow.PhaseIdle:
		b.WriteString("No active workflow.\n")
		b.WriteString("Type /plan <goal> to start a structured workflow.\n")
		b.WriteString("Example: /plan Create a REST API in Go\n")

	case workflow.PhaseGathering:
		b.WriteString(sectionStyle.Render("Gathering Requirements"))
		b.WriteString("\n")
		for i, q := range wf.Plan.Questions {
			icon := itemPendingStyle.Render("  ")
			if i < len(wf.Plan.Answers) {
				icon = itemOKStyle.Render("  ")
				b.WriteString(fmt.Sprintf("  %s Q: %s\n", icon, q))
				b.WriteString(fmt.Sprintf("      A: %s\n", wf.Plan.Answers[i]))
			} else {
				b.WriteString(fmt.Sprintf("  %s Q: %s\n", icon, q))
			}
		}
		if len(wf.Plan.Answers) >= len(wf.Plan.Questions) && len(wf.Plan.Questions) > 0 {
			b.WriteString("\n  ")
			b.WriteString(itemOKStyle.Render("[g] Generate plan"))
			b.WriteString("\n")
		}

	case workflow.PhasePlanning:
		b.WriteString(m.spinner.View())
		b.WriteString(" ")
		b.WriteString(itemWarnStyle.Render("Generating plan..."))
		b.WriteString("\n")

	case workflow.PhaseReviewing:
		b.WriteString(sectionStyle.Render("Plan (review before execution)"))
		b.WriteString("\n\n")
		for i, s := range wf.Plan.Steps {
			numStyle := lipgloss.NewStyle().Foreground(accentColor).Bold(true)
			icon := stepPendingStyle.Render("  ")
			b.WriteString(fmt.Sprintf("  %s %s %s\n", icon, numStyle.Render("#"+s.ID+":"), s.Title))
			b.WriteString(fmt.Sprintf("       %s\n", lipgloss.NewStyle().Foreground(lipgloss.Color("#E0E0E0")).Render(s.Description)))
			agentStyle := lipgloss.NewStyle().Foreground(aiColor).Render(s.Agent)
			b.WriteString(fmt.Sprintf("       Agent: %s\n", agentStyle))
			if i < len(wf.Plan.Steps)-1 {
				b.WriteString("\n")
			}
		}
		b.WriteString("\n  ")
		b.WriteString(itemOKStyle.Render("[a] Approve plan"))
		b.WriteString("  ")
		b.WriteString(itemMissingStyle.Render("[r] Reject with feedback"))
		b.WriteString("\n")

		if len(wf.Plan.PreviewFiles) > 0 {
			b.WriteString("\n  ")
			b.WriteString(itemWarnStyle.Render("Preview files available (opened in browser)"))
			b.WriteString("\n")
		}

	case workflow.PhaseExecuting:
		b.WriteString(sectionStyle.Render("Executing Plan"))
		b.WriteString("\n\n")
		done, total := wf.Progress()

		m.progressBar.SetPercent(float64(done) / float64(max(total, 1)))
		fmt.Fprintf(&b, "  %s %d/%d\n\n", m.progressBar.View(), done, total)

		for _, s := range wf.Plan.Steps {
			var icon string
			switch s.Status {
			case "done":
				icon = stepDoneStyle.Render("  ")
			case "error":
				icon = stepErrorStyle.Render("  ")
			default:
				if wf.Plan.Steps[wf.Plan.StepIndex].ID == s.ID {
					icon = stepCurrentStyle.Render(">")
				} else {
					icon = stepPendingStyle.Render("  ")
				}
			}
			b.WriteString(fmt.Sprintf("  %s %s: %s\n", icon, s.ID, s.Title))
			if s.Output != "" {
				output := s.Output
				if len(output) > 80 {
					output = output[:80] + "..."
				}
				b.WriteString(fmt.Sprintf("     %s\n", output))
			}
		}
		b.WriteString("\n  ")
		b.WriteString(itemOKStyle.Render("[n] Next step"))
		b.WriteString("  ")
		b.WriteString(itemMissingStyle.Render("[x] Cancel workflow"))
		b.WriteString("\n")

	case workflow.PhaseDone:
		b.WriteString(itemOKStyle.Render("Workflow completed!"))
		b.WriteString("\n\n")
		for _, s := range wf.Plan.Steps {
			icon := stepDoneStyle.Render("  ")
			b.WriteString(fmt.Sprintf("  %s %s: %s\n", icon, s.ID, s.Title))
		}
		b.WriteString("\n  [x] Reset workflow\n")

	case workflow.PhaseError:
		b.WriteString(itemMissingStyle.Render("Workflow encountered an error."))
		b.WriteString("\n  [x] Reset workflow\n")
	}

	b.WriteString("\n\n")
	b.WriteString(lipgloss.NewStyle().Foreground(dimColor).Render(strings.Repeat("─", max(m.width-4, 10))))
	b.WriteString("\n")
	b.WriteString(sectionStyle.Render("Chat"))
	b.WriteString("\n")
	for _, msg := range m.chatLog {
		lines := strings.Split(msg, "\n")
		for _, line := range lines {
			if len(line) > m.width-4 {
				line = line[:m.width-7] + "..."
			}
			b.WriteString("  " + line + "\n")
		}
	}

	return b.String()
}

func (m Model) renderAgents() string {
	var b strings.Builder

	b.WriteString(sectionStyle.Render("Background Agents"))
	b.WriteString("\n\n")

	agents := []struct {
		name      string
		agentType proxy.AgentType
		tool      string
	}{
		{"Crush", proxy.AgentCrush, "Z.AI GLM"},
		{"Claude Code", proxy.AgentClaude, "Anthropic Claude"},
	}

	for _, a := range agents {
		status, logs := m.proxyMgr.Status(a.agentType)
		available := m.proxyMgr.IsAvailable(a.agentType)

		var statusStr string
		switch status {
		case proxy.StatusRunning:
			statusStr = itemWarnStyle.Render(" running")
		case proxy.StatusStopped:
			statusStr = itemMissingStyle.Render(" stopped")
		case proxy.StatusError:
			statusStr = itemMissingStyle.Render(" error")
		default:
			if available {
				statusStr = itemOKStyle.Render(" available")
			} else {
				statusStr = itemMissingStyle.Render(" not installed")
			}
		}

		nameStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("#E0E0E0")).Bold(true)
		b.WriteString(fmt.Sprintf("  %s %s  %s\n", nameStyle.Render(a.name), statusStr,
			lipgloss.NewStyle().Foreground(mutedColor).Render("("+a.tool+")")))

		if logs != nil && len(logs) > 0 {
			lastLogs := logs
			if len(logs) > 5 {
				lastLogs = logs[len(logs)-5:]
			}
			for _, l := range lastLogs {
				b.WriteString(fmt.Sprintf("    %s %s\n",
					lipgloss.NewStyle().Foreground(dimColor).Render(l.Timestamp.Format("15:04:05")),
					l.Message))
			}
		}
	}

	b.WriteString("\n")
	b.WriteString(sectionStyle.Render("Actions"))
	b.WriteString("\n")
	b.WriteString(fmt.Sprintf("  %s Start Crush\n", lipgloss.NewStyle().Foreground(baseColor).Bold(true).Render("[c]")))
	b.WriteString(fmt.Sprintf("  %s Start Claude Code\n", lipgloss.NewStyle().Foreground(baseColor).Bold(true).Render("[l]")))

	return b.String()
}

func (m Model) renderConfig() string {
	var b strings.Builder

	b.WriteString(sectionStyle.Render("Profile"))
	b.WriteString("\n")
	if m.config != nil {
		fields := []struct {
			label string
			value string
		}{
			{"Name", m.config.Profile.Name},
			{"Pseudo", m.config.Profile.Pseudo},
			{"Email", m.config.Profile.Email},
			{"Editor", m.config.Profile.Preferences.Editor},
			{"Shell", m.config.Profile.Preferences.Shell},
			{"Theme", m.config.Profile.Preferences.Theme},
			{"Default AI", m.config.Profile.Preferences.DefaultAI},
		}
		for _, f := range fields {
			labelStyle := lipgloss.NewStyle().Foreground(mutedColor).Width(14)
			valueStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("#E0E0E0"))
			b.WriteString(fmt.Sprintf("  %s %s\n", labelStyle.Render(f.label+":"), valueStyle.Render(f.value)))
		}
		if len(m.config.Profile.Languages) > 0 {
			labelStyle := lipgloss.NewStyle().Foreground(mutedColor).Width(14)
			valueStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("#E0E0E0"))
			b.WriteString(fmt.Sprintf("  %s %s\n", labelStyle.Render("Languages:"), valueStyle.Render(strings.Join(m.config.Profile.Languages, ", "))))
		}
	}
	b.WriteString("\n")

	b.WriteString(sectionStyle.Render("AI Providers"))
	b.WriteString("\n")
	if m.config != nil {
		for _, p := range m.config.AI.Providers {
			active := ""
			if p.Active {
				active = itemOKStyle.Render(" active")
			}
			keyStatus := itemMissingStyle.Render("no key")
			if p.APIKey != "" {
				keyStatus = itemOKStyle.Render("configured")
			}
			nameStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("#E0E0E0")).Bold(true)
			b.WriteString(fmt.Sprintf("  %s  model=%s  key=%s%s\n",
				nameStyle.Render(p.Name), p.Model, keyStatus, active))
		}
	}
	b.WriteString("\n")

	b.WriteString(sectionStyle.Render("BMAD Method"))
	b.WriteString("\n")
	if m.config != nil {
		installed := itemMissingStyle.Render("no")
		if m.config.BMAD.Installed {
			installed = itemOKStyle.Render("yes")
		}
		b.WriteString(fmt.Sprintf("  Installed: %s\n", installed))
		b.WriteString(fmt.Sprintf("  Global:    %v\n", m.config.BMAD.Global))
	}
	b.WriteString("\n")

	b.WriteString(sectionStyle.Render("Terminal"))
	b.WriteString("\n")
	if m.config != nil {
		b.WriteString(fmt.Sprintf("  Custom Prompt: %v\n", m.config.Terminal.CustomPrompt))
		b.WriteString(fmt.Sprintf("  Prompt Theme:  %s\n", m.config.Terminal.PromptTheme))
	}
	b.WriteString("\n")

	b.WriteString(sectionStyle.Render(fmt.Sprintf("Skills (%d)", len(m.skillList))))
	b.WriteString("\n")
	if len(m.skillList) > 0 {
		for _, s := range m.skillList {
			target := s.Target
			if target == "" {
				target = "both"
			}
			b.WriteString(fmt.Sprintf("  %-20s %s %s\n",
				lipgloss.NewStyle().Foreground(lipgloss.Color("#E0E0E0")).Render(s.Name),
				lipgloss.NewStyle().Foreground(aiColor).Render("["+target+"]"),
				s.Description))
		}
	} else {
		b.WriteString("  No skills. Run `muyue skills init` to install built-ins.\n")
	}

	return b.String()
}

func (m Model) renderFooter() string {
	profile := "unknown"
	if m.config != nil && m.config.Profile.Pseudo != "" {
		profile = m.config.Profile.Pseudo
	}

	left := fmt.Sprintf(" %s@%s", profile, version.Name)
	leftR := statusBarStyle.Render(left)

	var helpText string
	switch m.activeTab {
	case tabDashboard:
		helpText = "[i] install  [u] update  [s] scan"
	case tabChat, tabWorkflow:
		helpText = "[ctrl+t] switch tab  [ctrl+c] quit"
	case tabTerminal:
		helpText = "[enter] run  [ctrl+c] kill  [clear] clear"
	case tabAgents:
		helpText = "[c] crush  [l] claude"
	default:
		helpText = "[ctrl+t] switch tab  [ctrl+c] quit"
	}
	rightR := statusBarStyle.Render(helpText)

	gap := m.width - lipgloss.Width(leftR) - lipgloss.Width(rightR)
	if gap < 0 {
		gap = 0
	}

	statusLine := lipgloss.JoinHorizontal(lipgloss.Bottom,
		leftR,
		strings.Repeat(" ", gap),
		rightR,
	)

	return lipgloss.JoinVertical(lipgloss.Left, statusLine,
		lipgloss.NewStyle().Foreground(dimColor).Render(
			lipgloss.NewStyle().Padding(0, 1).Render(m.helpModel.View(keys))))
}

func extractVersion(s string) string {
	return versionRegex.FindString(s)
}

var versionRegex = regexp.MustCompile(`\d+\.\d+\.\d+`)