package tui

import (
	"context"
	"log/slog"
	"strings"

	"github.com/charmbracelet/bubbles/cursor"
	"github.com/charmbracelet/bubbles/key"
	"github.com/charmbracelet/bubbles/spinner"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"

	"github.com/sst/opencode/internal/app"
	"github.com/sst/opencode/internal/components/core"
	"github.com/sst/opencode/internal/components/dialog"
	"github.com/sst/opencode/internal/layout"
	"github.com/sst/opencode/internal/page"
	"github.com/sst/opencode/internal/state"
	"github.com/sst/opencode/internal/status"
	"github.com/sst/opencode/internal/util"
	"github.com/sst/opencode/pkg/client"
)

type keyMap struct {
	Quit          key.Binding
	Help          key.Binding
	SwitchSession key.Binding
	Commands      key.Binding
	Filepicker    key.Binding
	Models        key.Binding
	SwitchTheme   key.Binding
	Tools         key.Binding
}

const (
	quitKey = "q"
)

var keys = keyMap{
	Quit: key.NewBinding(
		key.WithKeys("ctrl+c"),
		key.WithHelp("ctrl+c", "quit"),
	),
	Help: key.NewBinding(
		key.WithKeys("ctrl+_"),
		key.WithHelp("ctrl+?", "toggle help"),
	),

	SwitchSession: key.NewBinding(
		key.WithKeys("ctrl+s"),
		key.WithHelp("ctrl+s", "switch session"),
	),

	Commands: key.NewBinding(
		key.WithKeys("ctrl+k"),
		key.WithHelp("ctrl+k", "commands"),
	),
	Filepicker: key.NewBinding(
		key.WithKeys("ctrl+f"),
		key.WithHelp("ctrl+f", "select files to upload"),
	),
	Models: key.NewBinding(
		key.WithKeys("ctrl+o"),
		key.WithHelp("ctrl+o", "model selection"),
	),

	SwitchTheme: key.NewBinding(
		key.WithKeys("ctrl+t"),
		key.WithHelp("ctrl+t", "switch theme"),
	),

	Tools: key.NewBinding(
		key.WithKeys("f9"),
		key.WithHelp("f9", "show available tools"),
	),
}

var helpEsc = key.NewBinding(
	key.WithKeys("?"),
	key.WithHelp("?", "toggle help"),
)

var returnKey = key.NewBinding(
	key.WithKeys("esc"),
	key.WithHelp("esc", "close"),
)

type appModel struct {
	width, height int
	currentPage   page.PageID
	previousPage  page.PageID
	pages         map[page.PageID]tea.Model
	loadedPages   map[page.PageID]bool
	status        core.StatusCmp
	app           *app.App

	showPermissions bool
	permissions     dialog.PermissionDialogCmp

	showHelp bool
	help     dialog.HelpCmp

	showQuit bool
	quit     dialog.QuitDialog

	showSessionDialog bool
	sessionDialog     dialog.SessionDialog

	showCommandDialog bool
	commandDialog     dialog.CommandDialog
	commands          []dialog.Command

	showModelDialog bool
	modelDialog     dialog.ModelDialog

	showInitDialog bool
	initDialog     dialog.InitDialogCmp

	showFilepicker bool
	filepicker     dialog.FilepickerCmp

	showThemeDialog bool
	themeDialog     dialog.ThemeDialog

	showMultiArgumentsDialog bool
	multiArgumentsDialog     dialog.MultiArgumentsDialogCmp

	showToolsDialog bool
	toolsDialog     dialog.ToolsDialog
}

func (a appModel) Init() tea.Cmd {
	var cmds []tea.Cmd
	cmd := a.pages[a.currentPage].Init()
	a.loadedPages[a.currentPage] = true
	cmds = append(cmds, cmd)
	cmd = a.status.Init()
	cmds = append(cmds, cmd)
	cmd = a.quit.Init()
	cmds = append(cmds, cmd)
	cmd = a.help.Init()
	cmds = append(cmds, cmd)
	cmd = a.sessionDialog.Init()
	cmds = append(cmds, cmd)
	cmd = a.commandDialog.Init()
	cmds = append(cmds, cmd)
	cmd = a.modelDialog.Init()
	cmds = append(cmds, cmd)
	cmd = a.initDialog.Init()
	cmds = append(cmds, cmd)
	cmd = a.filepicker.Init()
	cmds = append(cmds, cmd)
	cmd = a.themeDialog.Init()
	cmds = append(cmds, cmd)
	cmd = a.toolsDialog.Init()
	cmds = append(cmds, cmd)

	// Check if we should show the init dialog
	cmds = append(cmds, func() tea.Msg {
		shouldShow := a.app.Info.Git && a.app.Info.Time.Initialized == nil
		return dialog.ShowInitDialogMsg{Show: shouldShow}
	})

	return tea.Batch(cmds...)
}

func (a appModel) updateAllPages(msg tea.Msg) (tea.Model, tea.Cmd) {
	var cmds []tea.Cmd
	var cmd tea.Cmd

	for id := range a.pages {
		a.pages[id], cmd = a.pages[id].Update(msg)
		cmds = append(cmds, cmd)
	}

	s, cmd := a.status.Update(msg)
	cmds = append(cmds, cmd)
	a.status = s.(core.StatusCmp)

	return a, tea.Batch(cmds...)
}

func (a appModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	var cmds []tea.Cmd
	var cmd tea.Cmd
	switch msg := msg.(type) {
	case cursor.BlinkMsg:
		return a.updateAllPages(msg)
	case spinner.TickMsg:
		return a.updateAllPages(msg)

	case client.EventSessionUpdated:
		if msg.Properties.Info.Id == a.app.Session.Id {
			a.app.Session = &msg.Properties.Info
			return a.updateAllPages(state.StateUpdatedMsg{State: nil})
		}

	case client.EventMessageUpdated:
		if msg.Properties.Info.Metadata.SessionID == a.app.Session.Id {
			for i, m := range a.app.Messages {
				if m.Id == msg.Properties.Info.Id {
					a.app.Messages[i] = msg.Properties.Info
					return a.updateAllPages(state.StateUpdatedMsg{State: nil})
				}
			}
			a.app.Messages = append(a.app.Messages, msg.Properties.Info)
			return a.updateAllPages(state.StateUpdatedMsg{State: nil})
		}

	case tea.WindowSizeMsg:
		msg.Height -= 2 // Make space for the status bar
		a.width, a.height = msg.Width, msg.Height

		s, _ := a.status.Update(msg)
		a.status = s.(core.StatusCmp)
		a.pages[a.currentPage], cmd = a.pages[a.currentPage].Update(msg)
		cmds = append(cmds, cmd)

		prm, permCmd := a.permissions.Update(msg)
		a.permissions = prm.(dialog.PermissionDialogCmp)
		cmds = append(cmds, permCmd)

		help, helpCmd := a.help.Update(msg)
		a.help = help.(dialog.HelpCmp)
		cmds = append(cmds, helpCmd)

		session, sessionCmd := a.sessionDialog.Update(msg)
		a.sessionDialog = session.(dialog.SessionDialog)
		cmds = append(cmds, sessionCmd)

		command, commandCmd := a.commandDialog.Update(msg)
		a.commandDialog = command.(dialog.CommandDialog)
		cmds = append(cmds, commandCmd)

		filepicker, filepickerCmd := a.filepicker.Update(msg)
		a.filepicker = filepicker.(dialog.FilepickerCmp)
		cmds = append(cmds, filepickerCmd)

		a.initDialog.SetSize(msg.Width, msg.Height)

		if a.showMultiArgumentsDialog {
			a.multiArgumentsDialog.SetSize(msg.Width, msg.Height)
			args, argsCmd := a.multiArgumentsDialog.Update(msg)
			a.multiArgumentsDialog = args.(dialog.MultiArgumentsDialogCmp)
			cmds = append(cmds, argsCmd, a.multiArgumentsDialog.Init())
		}

		return a, tea.Batch(cmds...)

	// case pubsub.Event[permission.PermissionRequest]:
	// 	a.showPermissions = true
	// 	return a, a.permissions.SetPermissions(msg.Payload)

	case dialog.PermissionResponseMsg:
		// TODO: Permissions service not implemented in API yet
		// var cmd tea.Cmd
		// switch msg.Action {
		// case dialog.PermissionAllow:
		// 	a.app.Permissions.Grant(context.Background(), msg.Permission)
		// case dialog.PermissionAllowForSession:
		// 	a.app.Permissions.GrantPersistant(context.Background(), msg.Permission)
		// case dialog.PermissionDeny:
		// 	a.app.Permissions.Deny(context.Background(), msg.Permission)
		// }
		a.showPermissions = false
		return a, nil

	case page.PageChangeMsg:
		return a, a.moveToPage(msg.ID)

	case dialog.CloseQuitMsg:
		a.showQuit = false
		return a, nil

	case dialog.CloseSessionDialogMsg:
		a.showSessionDialog = false
		if msg.Session != nil {
			return a, util.CmdHandler(state.SessionSelectedMsg(msg.Session))
		}
		return a, nil

	case state.SessionSelectedMsg:
		a.app.Session = msg
		a.app.Messages, _ = a.app.ListMessages(context.Background(), msg.Id)
		return a.updateAllPages(msg)

	case dialog.CloseModelDialogMsg:
		a.showModelDialog = false
		slog.Debug("closing model dialog", "msg", msg)
		if msg.Provider != nil && msg.Model != nil {
			return a, util.CmdHandler(state.ModelSelectedMsg{Provider: *msg.Provider, Model: *msg.Model})
		}
		return a, nil

	case state.ModelSelectedMsg:
		a.app.Provider = &msg.Provider
		a.app.Model = &msg.Model
		a.app.Config.Provider = msg.Provider.Id
		a.app.Config.Model = msg.Model.Id
		a.app.SaveConfig()
		return a.updateAllPages(msg)

	case dialog.CloseCommandDialogMsg:
		a.showCommandDialog = false
		return a, nil

	case dialog.CloseThemeDialogMsg:
		a.showThemeDialog = false
		return a, nil

	case dialog.CloseToolsDialogMsg:
		a.showToolsDialog = false
		return a, nil

	case dialog.ShowToolsDialogMsg:
		a.showToolsDialog = msg.Show
		return a, nil

	case dialog.ThemeChangedMsg:
		a.app.Config.Theme = msg.ThemeName
		a.app.SaveConfig()

		a.pages[a.currentPage], cmd = a.pages[a.currentPage].Update(msg)
		a.showThemeDialog = false
		status.Info("Theme changed to: " + msg.ThemeName)
		return a, cmd

	case dialog.ShowInitDialogMsg:
		a.showInitDialog = msg.Show
		return a, nil

	case dialog.CloseInitDialogMsg:
		a.showInitDialog = false
		if msg.Initialize {
			return a, a.app.InitializeProject(context.Background())
		} else {
			// Mark the project as initialized without running the command
			if err := a.app.MarkProjectInitialized(context.Background()); err != nil {
				status.Error(err.Error())
				return a, nil
			}
		}
		return a, nil

	case dialog.CommandSelectedMsg:
		a.showCommandDialog = false
		// Execute the command handler if available
		if msg.Command.Handler != nil {
			return a, msg.Command.Handler(msg.Command)
		}
		status.Info("Command selected: " + msg.Command.Title)
		return a, nil

	case dialog.ShowMultiArgumentsDialogMsg:
		// Show multi-arguments dialog
		a.multiArgumentsDialog = dialog.NewMultiArgumentsDialogCmp(msg.CommandID, msg.Content, msg.ArgNames)
		a.showMultiArgumentsDialog = true
		return a, a.multiArgumentsDialog.Init()

	case dialog.CloseMultiArgumentsDialogMsg:
		// Close multi-arguments dialog
		a.showMultiArgumentsDialog = false

		// If submitted, replace all named arguments and run the command
		if msg.Submit {
			content := msg.Content

			// Replace each named argument with its value
			for name, value := range msg.Args {
				placeholder := "$" + name
				content = strings.ReplaceAll(content, placeholder, value)
			}

			// Execute the command with arguments
			return a, util.CmdHandler(dialog.CommandRunCustomMsg{
				Content: content,
				Args:    msg.Args,
			})
		}
		return a, nil

	case tea.KeyMsg:
		// If multi-arguments dialog is open, let it handle the key press first
		if a.showMultiArgumentsDialog {
			args, cmd := a.multiArgumentsDialog.Update(msg)
			a.multiArgumentsDialog = args.(dialog.MultiArgumentsDialogCmp)
			return a, cmd
		}

		switch {
		case key.Matches(msg, keys.Quit):
			a.showQuit = !a.showQuit
			if a.showHelp {
				a.showHelp = false
			}
			if a.showSessionDialog {
				a.showSessionDialog = false
			}
			if a.showCommandDialog {
				a.showCommandDialog = false
			}
			if a.showFilepicker {
				a.showFilepicker = false
				a.filepicker.ToggleFilepicker(a.showFilepicker)
				a.app.SetFilepickerOpen(a.showFilepicker)
			}
			if a.showModelDialog {
				a.showModelDialog = false
			}
			if a.showMultiArgumentsDialog {
				a.showMultiArgumentsDialog = false
			}
			if a.showToolsDialog {
				a.showToolsDialog = false
			}
			return a, nil
		case key.Matches(msg, keys.SwitchSession):
			if a.currentPage == page.ChatPage && !a.showQuit && !a.showPermissions && !a.showCommandDialog {
				// Close other dialogs
				a.showToolsDialog = false
				a.showThemeDialog = false
				a.showModelDialog = false
				a.showFilepicker = false

				// Load sessions and show the dialog
				sessions, err := a.app.ListSessions(context.Background())
				if err != nil {
					status.Error(err.Error())
					return a, nil
				}
				if len(sessions) == 0 {
					status.Warn("No sessions available")
					return a, nil
				}
				a.sessionDialog.SetSessions(sessions)
				a.showSessionDialog = true
				return a, nil
			}
			return a, nil
		case key.Matches(msg, keys.Commands):
			if a.currentPage == page.ChatPage && !a.showQuit && !a.showPermissions && !a.showSessionDialog && !a.showThemeDialog && !a.showFilepicker {
				// Close other dialogs
				a.showToolsDialog = false
				a.showModelDialog = false

				// Show commands dialog
				if len(a.commands) == 0 {
					status.Warn("No commands available")
					return a, nil
				}
				a.commandDialog.SetCommands(a.commands)
				a.showCommandDialog = true
				return a, nil
			}
			return a, nil
		case key.Matches(msg, keys.Models):
			if a.showModelDialog {
				a.showModelDialog = false
				return a, nil
			}
			if a.currentPage == page.ChatPage && !a.showQuit && !a.showPermissions && !a.showSessionDialog && !a.showCommandDialog {
				// Close other dialogs
				a.showToolsDialog = false
				a.showThemeDialog = false
				a.showFilepicker = false

				// Load providers and show the dialog
				providers, err := a.app.ListProviders(context.Background())
				if err != nil {
					status.Error(err.Error())
					return a, nil
				}
				if len(providers) == 0 {
					status.Warn("No providers available")
					return a, nil
				}
				a.modelDialog.SetProviders(providers)

				a.showModelDialog = true
				return a, nil
			}
			return a, nil
		case key.Matches(msg, keys.SwitchTheme):
			if a.currentPage == page.ChatPage && !a.showQuit && !a.showPermissions && !a.showSessionDialog && !a.showCommandDialog {
				// Close other dialogs
				a.showToolsDialog = false
				a.showModelDialog = false
				a.showFilepicker = false

				a.showThemeDialog = true
				return a, a.themeDialog.Init()
			}
			return a, nil
		case key.Matches(msg, keys.Tools):
			// Check if any other dialog is open
			if a.currentPage == page.ChatPage && !a.showQuit && !a.showPermissions &&
				!a.showSessionDialog && !a.showCommandDialog && !a.showThemeDialog &&
				!a.showFilepicker && !a.showModelDialog && !a.showInitDialog &&
				!a.showMultiArgumentsDialog {
				// Toggle tools dialog
				a.showToolsDialog = !a.showToolsDialog
				if a.showToolsDialog {
					// Get tool names dynamically
					toolNames := getAvailableToolNames(a.app)
					a.toolsDialog.SetTools(toolNames)
				}
				return a, nil
			}
			return a, nil
		case key.Matches(msg, returnKey) || key.Matches(msg):
			if !a.filepicker.IsCWDFocused() {
				if a.showToolsDialog {
					a.showToolsDialog = false
					return a, nil
				}
				if a.showQuit {
					a.showQuit = !a.showQuit
					return a, nil
				}
				if a.showHelp {
					a.showHelp = !a.showHelp
					return a, nil
				}
				if a.showInitDialog {
					a.showInitDialog = false
					// TODO: should we not ask again?
					// Mark the project as initialized without running the command
					// if err := config.MarkProjectInitialized(); err != nil {
					// 	status.Error(err.Error())
					// 	return a, nil
					// }
					return a, nil
				}
				if a.showFilepicker {
					a.showFilepicker = false
					a.filepicker.ToggleFilepicker(a.showFilepicker)
					a.app.SetFilepickerOpen(a.showFilepicker)
					return a, nil
				}
			}
		case key.Matches(msg, keys.Help):
			if a.showQuit {
				return a, nil
			}
			a.showHelp = !a.showHelp

			// Close other dialogs if opening help
			if a.showHelp {
				a.showToolsDialog = false
			}
			return a, nil
		case key.Matches(msg, helpEsc):
			if a.app.IsBusy() {
				if a.showQuit {
					return a, nil
				}
				a.showHelp = !a.showHelp
				return a, nil
			}
		case key.Matches(msg, keys.Filepicker):
			// Toggle filepicker
			a.showFilepicker = !a.showFilepicker
			a.filepicker.ToggleFilepicker(a.showFilepicker)
			a.app.SetFilepickerOpen(a.showFilepicker)
			// Close other dialogs if opening filepicker
			if a.showFilepicker {
				a.showToolsDialog = false
				a.showThemeDialog = false
				a.showModelDialog = false
				a.showCommandDialog = false
				a.showSessionDialog = false
			}
			return a, nil
		}

	default:
		f, filepickerCmd := a.filepicker.Update(msg)
		a.filepicker = f.(dialog.FilepickerCmp)
		cmds = append(cmds, filepickerCmd)
	}

	if a.showFilepicker {
		f, filepickerCmd := a.filepicker.Update(msg)
		a.filepicker = f.(dialog.FilepickerCmp)
		cmds = append(cmds, filepickerCmd)
		// Only block key messages send all other messages down
		if _, ok := msg.(tea.KeyMsg); ok {
			return a, tea.Batch(cmds...)
		}
	}

	if a.showQuit {
		q, quitCmd := a.quit.Update(msg)
		a.quit = q.(dialog.QuitDialog)
		cmds = append(cmds, quitCmd)
		// Only block key messages send all other messages down
		if _, ok := msg.(tea.KeyMsg); ok {
			return a, tea.Batch(cmds...)
		}
	}

	if a.showPermissions {
		d, permissionsCmd := a.permissions.Update(msg)
		a.permissions = d.(dialog.PermissionDialogCmp)
		cmds = append(cmds, permissionsCmd)
		// Only block key messages send all other messages down
		if _, ok := msg.(tea.KeyMsg); ok {
			return a, tea.Batch(cmds...)
		}
	}

	if a.showSessionDialog {
		d, sessionCmd := a.sessionDialog.Update(msg)
		a.sessionDialog = d.(dialog.SessionDialog)
		cmds = append(cmds, sessionCmd)
		// Only block key messages send all other messages down
		if _, ok := msg.(tea.KeyMsg); ok {
			return a, tea.Batch(cmds...)
		}
	}

	if a.showCommandDialog {
		d, commandCmd := a.commandDialog.Update(msg)
		a.commandDialog = d.(dialog.CommandDialog)
		cmds = append(cmds, commandCmd)
		// Only block key messages send all other messages down
		if _, ok := msg.(tea.KeyMsg); ok {
			return a, tea.Batch(cmds...)
		}
	}

	if a.showModelDialog {
		d, modelCmd := a.modelDialog.Update(msg)
		a.modelDialog = d.(dialog.ModelDialog)
		cmds = append(cmds, modelCmd)
		// Only block key messages send all other messages down
		if _, ok := msg.(tea.KeyMsg); ok {
			return a, tea.Batch(cmds...)
		}
	}

	if a.showInitDialog {
		d, initCmd := a.initDialog.Update(msg)
		a.initDialog = d.(dialog.InitDialogCmp)
		cmds = append(cmds, initCmd)
		// Only block key messages send all other messages down
		if _, ok := msg.(tea.KeyMsg); ok {
			return a, tea.Batch(cmds...)
		}
	}

	if a.showThemeDialog {
		d, themeCmd := a.themeDialog.Update(msg)
		a.themeDialog = d.(dialog.ThemeDialog)
		cmds = append(cmds, themeCmd)
		// Only block key messages send all other messages down
		if _, ok := msg.(tea.KeyMsg); ok {
			return a, tea.Batch(cmds...)
		}
	}

	if a.showToolsDialog {
		d, toolsCmd := a.toolsDialog.Update(msg)
		a.toolsDialog = d.(dialog.ToolsDialog)
		cmds = append(cmds, toolsCmd)
		// Only block key messages send all other messages down
		if _, ok := msg.(tea.KeyMsg); ok {
			return a, tea.Batch(cmds...)
		}
	}

	s, cmd := a.status.Update(msg)
	cmds = append(cmds, cmd)
	a.status = s.(core.StatusCmp)

	a.pages[a.currentPage], cmd = a.pages[a.currentPage].Update(msg)
	cmds = append(cmds, cmd)
	return a, tea.Batch(cmds...)
}

// RegisterCommand adds a command to the command dialog
func (a *appModel) RegisterCommand(cmd dialog.Command) {
	a.commands = append(a.commands, cmd)
}

// getAvailableToolNames returns a list of all available tool names
func getAvailableToolNames(_ *app.App) []string {
	// TODO: Tools not implemented in API yet
	return []string{"Tools not available in API mode"}
}

func (a *appModel) moveToPage(pageID page.PageID) tea.Cmd {
	var cmds []tea.Cmd
	if _, ok := a.loadedPages[pageID]; !ok {
		cmd := a.pages[pageID].Init()
		cmds = append(cmds, cmd)
		a.loadedPages[pageID] = true
	}
	a.previousPage = a.currentPage
	a.currentPage = pageID
	if sizable, ok := a.pages[a.currentPage].(layout.Sizeable); ok {
		cmd := sizable.SetSize(a.width, a.height)
		cmds = append(cmds, cmd)
	}

	return tea.Batch(cmds...)
}

func (a appModel) View() string {
	components := []string{
		a.pages[a.currentPage].View(),
	}

	components = append(components, a.status.View())

	appView := lipgloss.JoinVertical(lipgloss.Top, components...)

	if a.showPermissions {
		overlay := a.permissions.View()
		row := lipgloss.Height(appView) / 2
		row -= lipgloss.Height(overlay) / 2
		col := lipgloss.Width(appView) / 2
		col -= lipgloss.Width(overlay) / 2
		appView = layout.PlaceOverlay(
			col,
			row,
			overlay,
			appView,
			true,
		)
	}

	if a.showFilepicker {
		overlay := a.filepicker.View()
		row := lipgloss.Height(appView) / 2
		row -= lipgloss.Height(overlay) / 2
		col := lipgloss.Width(appView) / 2
		col -= lipgloss.Width(overlay) / 2
		appView = layout.PlaceOverlay(
			col,
			row,
			overlay,
			appView,
			true,
		)

	}

	if a.showHelp {
		bindings := layout.KeyMapToSlice(keys)
		if p, ok := a.pages[a.currentPage].(layout.Bindings); ok {
			bindings = append(bindings, p.BindingKeys()...)
		}
		if a.showPermissions {
			bindings = append(bindings, a.permissions.BindingKeys()...)
		}
		if !a.app.IsBusy() {
			bindings = append(bindings, helpEsc)
		}
		a.help.SetBindings(bindings)

		overlay := a.help.View()
		row := lipgloss.Height(appView) / 2
		row -= lipgloss.Height(overlay) / 2
		col := lipgloss.Width(appView) / 2
		col -= lipgloss.Width(overlay) / 2
		appView = layout.PlaceOverlay(
			col,
			row,
			overlay,
			appView,
			true,
		)
	}

	if a.showQuit {
		overlay := a.quit.View()
		row := lipgloss.Height(appView) / 2
		row -= lipgloss.Height(overlay) / 2
		col := lipgloss.Width(appView) / 2
		col -= lipgloss.Width(overlay) / 2
		appView = layout.PlaceOverlay(
			col,
			row,
			overlay,
			appView,
			true,
		)
	}

	if a.showSessionDialog {
		overlay := a.sessionDialog.View()
		row := lipgloss.Height(appView) / 2
		row -= lipgloss.Height(overlay) / 2
		col := lipgloss.Width(appView) / 2
		col -= lipgloss.Width(overlay) / 2
		appView = layout.PlaceOverlay(
			col,
			row,
			overlay,
			appView,
			true,
		)
	}

	if a.showModelDialog {
		overlay := a.modelDialog.View()
		row := lipgloss.Height(appView) / 2
		row -= lipgloss.Height(overlay) / 2
		col := lipgloss.Width(appView) / 2
		col -= lipgloss.Width(overlay) / 2
		appView = layout.PlaceOverlay(
			col,
			row,
			overlay,
			appView,
			true,
		)
	}

	if a.showCommandDialog {
		overlay := a.commandDialog.View()
		row := lipgloss.Height(appView) / 2
		row -= lipgloss.Height(overlay) / 2
		col := lipgloss.Width(appView) / 2
		col -= lipgloss.Width(overlay) / 2
		appView = layout.PlaceOverlay(
			col,
			row,
			overlay,
			appView,
			true,
		)
	}

	if a.showInitDialog {
		overlay := a.initDialog.View()
		appView = layout.PlaceOverlay(
			a.width/2-lipgloss.Width(overlay)/2,
			a.height/2-lipgloss.Height(overlay)/2,
			overlay,
			appView,
			true,
		)
	}

	if a.showThemeDialog {
		overlay := a.themeDialog.View()
		row := lipgloss.Height(appView) / 2
		row -= lipgloss.Height(overlay) / 2
		col := lipgloss.Width(appView) / 2
		col -= lipgloss.Width(overlay) / 2
		appView = layout.PlaceOverlay(
			col,
			row,
			overlay,
			appView,
			true,
		)
	}

	if a.showMultiArgumentsDialog {
		overlay := a.multiArgumentsDialog.View()
		row := lipgloss.Height(appView) / 2
		row -= lipgloss.Height(overlay) / 2
		col := lipgloss.Width(appView) / 2
		col -= lipgloss.Width(overlay) / 2
		appView = layout.PlaceOverlay(
			col,
			row,
			overlay,
			appView,
			true,
		)
	}

	if a.showToolsDialog {
		overlay := a.toolsDialog.View()
		row := lipgloss.Height(appView) / 2
		row -= lipgloss.Height(overlay) / 2
		col := lipgloss.Width(appView) / 2
		col -= lipgloss.Width(overlay) / 2
		appView = layout.PlaceOverlay(
			col,
			row,
			overlay,
			appView,
			true,
		)
	}

	return appView
}

func NewModel(app *app.App) tea.Model {
	startPage := page.ChatPage
	model := &appModel{
		currentPage:   startPage,
		loadedPages:   make(map[page.PageID]bool),
		status:        core.NewStatusCmp(app),
		help:          dialog.NewHelpCmp(),
		quit:          dialog.NewQuitCmp(),
		sessionDialog: dialog.NewSessionDialogCmp(),
		commandDialog: dialog.NewCommandDialogCmp(),
		modelDialog:   dialog.NewModelDialogCmp(app),
		permissions:   dialog.NewPermissionDialogCmp(),
		initDialog:    dialog.NewInitDialogCmp(),
		themeDialog:   dialog.NewThemeDialogCmp(),
		toolsDialog:   dialog.NewToolsDialogCmp(),
		app:           app,
		commands:      []dialog.Command{},
		pages: map[page.PageID]tea.Model{
			page.ChatPage: page.NewChatPage(app),
		},
		filepicker: dialog.NewFilepickerCmp(app),
	}

	model.RegisterCommand(dialog.Command{
		ID:          "init",
		Title:       "Initialize Project",
		Description: "Create/Update the AGENTS.md memory file",
		Handler: func(cmd dialog.Command) tea.Cmd {
			return app.InitializeProject(context.Background())
		},
	})

	model.RegisterCommand(dialog.Command{
		ID:          "compact_conversation",
		Title:       "Compact Conversation",
		Description: "Summarize the current session to save tokens",
		Handler: func(cmd dialog.Command) tea.Cmd {
			// Get the current session from the appModel
			if model.currentPage != page.ChatPage {
				status.Warn("Please navigate to a chat session first.")
				return nil
			}

			// Return a message that will be handled by the chat page
			status.Info("Compacting conversation...")
			return util.CmdHandler(state.CompactSessionMsg{})
		},
	})

	// Load custom commands
	customCommands, err := dialog.LoadCustomCommands(app)
	if err != nil {
		slog.Warn("Failed to load custom commands", "error", err)
	} else {
		for _, cmd := range customCommands {
			model.RegisterCommand(cmd)
		}
	}

	return model
}
