package ui

import (
	"context"
	"fmt"
	"os"
	"strings"
	"time"

	"github.com/charmbracelet/bubbles/key"
	"github.com/charmbracelet/bubbles/list"
	"github.com/charmbracelet/bubbles/textinput"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"

	"task/internal/command"
	"task/internal/config"
	"task/internal/project"
	"task/internal/ticket"
	"task/internal/ui/views"
	"task/internal/version"
	"task/internal/youtrack"
	"task/internal/ytsync"
)

// DaemonChangedMsg is sent when the daemon publishes a change event (SSE).
type DaemonChangedMsg struct {
	ProjectID string
}

// RemoteOps is the optional daemon client surface for sync and MCP tokens.
type RemoteOps interface {
	SyncPull(projectID string) (ytsync.Result, error)
	SyncPush(projectID string) (ytsync.Result, error)
	CreateMCPToken(projectID string) (token, createdAt string, err error)
	RevokeMCPToken(projectID string) error
}

// timerTickMsg refreshes the header while a timer is running.
type timerTickMsg time.Time

// editorFinishedMsg is sent after the external $EDITOR exits.
type editorFinishedMsg struct {
	ticketID string // empty when create==true
	path     string
	err      error
	create   bool // true: create ticket from edited file
}

// syncFinishedMsg is sent after a manual YouTrack pull or push completes.
type syncFinishedMsg struct {
	projectID string
	action    views.SyncAction
	pull      ytsync.Result
	push      ytsync.Result
	err       error
}

// Mode is the active UI mode.
type Mode int

const (
	ModeList Mode = iota
	ModeCreate
	ModeSearch
	ModeProjects
	ModeMoveTicket
	ModeStatus
	ModeBoard
	ModeConfirmDelete
	ModeTimeManual
	ModeTimeEntries
	ModeTimeEdit
	ModeReport
	ModeReportGroup
	ModeEditProject
	ModeSync
)

// Model is the root Bubble Tea model.
type Model struct {
	cfg       *config.Config
	store     ticket.Store
	timeStore ticket.TimeStore
	projects  project.Store
	exec      command.Executor

	mode                 Mode
	tickets              views.TicketList
	projectList          list.Model
	statusMenu           views.StatusMenu
	syncMenu             views.SyncMenu
	syncProjectID        string // project targeted by ModeSync
	boardMenu            views.BoardMenu
	boardFilter          ticket.BoardFilter
	input                textinput.Model
	report               views.ReportView
	reportGroupBy        ticket.GroupBy
	groupByMenu          views.GroupByMenu
	timeEntries          views.TimeEntriesView
	timeEntriesTicket    string // ticket ID for ModeTimeEntries
	editingTimeEntry     ticket.TimeEntry
	timeEdit             views.TimeEditForm
	activeTimer          *ticket.ActiveTimer
	spentByID            map[string]time.Duration
	width                int
	height               int
	status               string
	statusIsError        bool
	filter               string
	keys                 KeyMap
	styles               Styles
	version              string
	allTickets           []ticket.Ticket
	creatingProject      bool
	pendingDeleteTitle   string
	pendingDeleteProject string // non-empty → confirm deletes a project, not a ticket
	projectEdit          views.ProjectEditForm
	projectEditMeta      project.Meta // snapshot when opening the form
	syncing              bool
	remote               RemoteOps
}

// New creates the root UI model.
func New(cfg *config.Config, store ticket.Store, projects project.Store, timeStore ticket.TimeStore, exec command.Executor, remote RemoteOps) Model {
	styles := DefaultStyles()
	if exec == nil {
		exec = command.NewHistory()
	}

	m := Model{
		cfg:           cfg,
		store:         store,
		timeStore:     timeStore,
		projects:      projects,
		exec:          exec,
		remote:        remote,
		mode:          ModeList,
		boardFilter:   ticket.ParseBoardLists(cfg.ActiveBoardLists(cfg.ActiveProject)),
		reportGroupBy: ticket.GroupByProject,
		spentByID:     map[string]time.Duration{},
		tickets: views.TicketList{
			Styles: views.TicketListStyles{
				Card:         styles.Card,
				CardSelected: styles.CardSelected,
				StatusOPEN:   styles.StatusTodo,
				StatusWIP:    styles.StatusWIP,
				StatusDONE:   styles.StatusDone,
				Headline:     styles.Headline,
			},
			SpentByID: map[string]time.Duration{},
		},
		input:   views.NewCreateInput(),
		keys:    DefaultKeyMap(),
		styles:  styles,
		version: version.BuildVersion,
	}
	if timeStore != nil {
		if t, err := timeStore.LoadActiveTimer(); err == nil {
			m.activeTimer = t
		}
	}
	_ = m.reloadTickets()
	return m
}

// Init implements tea.Model.
func (m Model) Init() tea.Cmd {
	if m.activeTimer != nil {
		return timerTickCmd()
	}
	return nil
}

func timerTickCmd() tea.Cmd {
	return tea.Tick(time.Second, func(t time.Time) tea.Msg {
		return timerTickMsg(t)
	})
}

// Update implements tea.Model.
func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	switch msg := msg.(type) {
	case DaemonChangedMsg:
		_ = m.reloadTickets()
		if m.activeTimer != nil && m.timeStore != nil {
			if t, err := m.timeStore.LoadActiveTimer(); err == nil {
				m.activeTimer = t
			}
		}
		return m, nil

	case tea.WindowSizeMsg:
		m.width = msg.Width
		m.height = msg.Height
		m.resizeLists()
		return m, nil

	case timerTickMsg:
		if m.activeTimer != nil {
			return m, timerTickCmd()
		}
		return m, nil

	case editorFinishedMsg:
		return m.handleEditorFinished(msg)

	case syncFinishedMsg:
		m.syncing = false
		if msg.err != nil {
			m.setError(msg.err)
			return m, nil
		}
		if err := m.reloadTickets(); err != nil {
			m.setError(err)
			return m, nil
		}
		switch msg.action {
		case views.SyncActionPush:
			m.setStatus(fmt.Sprintf(
				"pushed %s: +%d ~%d · time %d",
				msg.projectID, msg.push.Created, msg.push.Updated, msg.push.TimePushed,
			))
		default:
			m.setStatus(fmt.Sprintf(
				"pulled %s: +%d ~%d · time %d",
				msg.projectID, msg.pull.Created, msg.pull.Updated, msg.pull.TimePulled,
			))
		}
		return m, nil

	case tea.KeyMsg:
		switch m.mode {
		case ModeCreate, ModeSearch, ModeTimeManual:
			return m.updateInput(msg)
		case ModeTimeEdit:
			return m.updateTimeEdit(msg)
		case ModeEditProject:
			return m.updateEditProject(msg)
		case ModeProjects:
			return m.updateProjects(msg)
		case ModeMoveTicket:
			return m.updateMoveTicket(msg)
		case ModeStatus:
			return m.updateStatus(msg)
		case ModeSync:
			return m.updateSync(msg)
		case ModeBoard:
			return m.updateBoard(msg)
		case ModeConfirmDelete:
			return m.updateConfirmDelete(msg)
		case ModeTimeEntries:
			return m.updateTimeEntries(msg)
		case ModeReport:
			return m.updateReport(msg)
		case ModeReportGroup:
			return m.updateReportGroup(msg)
		default:
			return m.updateList(msg)
		}
	}

	var cmd tea.Cmd
	switch m.mode {
	case ModeProjects, ModeMoveTicket:
		m.projectList, cmd = m.projectList.Update(msg)
	case ModeCreate, ModeSearch, ModeTimeManual:
		m.input, cmd = m.input.Update(msg)
	case ModeTimeEdit:
		cmd = m.timeEdit.Update(msg)
	case ModeEditProject:
		cmd = m.projectEdit.Update(msg)
	}
	return m, cmd
}

// View implements tea.Model.
func (m Model) View() string {
	if m.width == 0 {
		return "loading…"
	}
	header := m.renderHeader()
	footer := m.renderFooter()
	bodyH := m.height - lipgloss.Height(header) - lipgloss.Height(footer)
	if bodyH < 1 {
		bodyH = 1
	}
	body := m.renderBody(bodyH)
	return lipgloss.JoinVertical(lipgloss.Left, header, body, footer)
}

func (m *Model) resizeLists() {
	headerH := 1
	footerH := 1
	bodyH := m.height - headerH - footerH
	if bodyH < 1 {
		bodyH = 1
	}
	m.tickets.SetSize(m.width, bodyH)
	if m.mode == ModeProjects || m.mode == ModeMoveTicket {
		m.projectList.SetSize(m.width, bodyH)
	}
	m.input.Width = max(10, m.width-4)
	m.statusMenu.Width = m.width
	m.boardMenu.Width = m.width
	m.groupByMenu.Width = m.width
	m.report.SetSize(m.width, bodyH)
	m.timeEntries.SetSize(m.width, bodyH)
}

func (m Model) updateList(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Quit):
		return m, tea.Quit

	case key.Matches(msg, m.keys.New):
		m.clearStatus()
		m.creatingProject = false
		m.mode = ModeCreate
		m.input = views.NewCreateInput()
		m.input.Focus()
		return m, textinput.Blink

	case key.Matches(msg, m.keys.Search):
		m.clearStatus()
		m.creatingProject = false
		m.mode = ModeSearch
		m.input = views.NewSearchInput()
		m.input.SetValue(m.filter)
		m.input.Focus()
		return m, textinput.Blink

	case key.Matches(msg, m.keys.Project):
		m.clearStatus()
		if err := m.openProjects(); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeProjects
		return m, nil

	case key.Matches(msg, m.keys.MoveTicket):
		m.clearStatus()
		if _, ok := m.tickets.Selected(); !ok {
			m.setError(fmt.Errorf("no ticket selected"))
			return m, nil
		}
		if err := m.openProjects(); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeMoveTicket
		return m, nil

	case key.Matches(msg, m.keys.Board):
		m.clearStatus()
		m.boardMenu = views.NewBoardMenu(m.boardFilter, m.width, views.StatusMenuStyles{
			Box:      m.styles.StatusMenuBox,
			Title:    m.styles.StatusMenuTitle,
			Selected: m.styles.StatusMenuSelected,
			Normal:   m.styles.StatusMenuNormal,
		})
		m.mode = ModeBoard
		return m, nil

	case key.Matches(msg, m.keys.DeleteForce):
		m.clearStatus()
		if err := m.deleteSelected(); err != nil {
			m.setError(err)
		} else {
			m.setStatus("deleted")
		}
		return m, nil

	case key.Matches(msg, m.keys.Delete):
		m.clearStatus()
		t, ok := m.tickets.Selected()
		if !ok {
			m.setError(fmt.Errorf("no ticket selected"))
			return m, nil
		}
		m.pendingDeleteTitle = strings.TrimSpace(t.Title)
		m.mode = ModeConfirmDelete
		return m, nil

	case key.Matches(msg, m.keys.Undo):
		m.clearStatus()
		if err := m.undo(); err != nil {
			m.setError(err)
		}
		return m, nil

	case key.Matches(msg, m.keys.Redo):
		m.clearStatus()
		if err := m.redo(); err != nil {
			m.setError(err)
		}
		return m, nil

	case key.Matches(msg, m.keys.Edit):
		m.clearStatus()
		cmd, err := m.openEditorForSelected()
		if err != nil {
			m.setError(err)
			return m, nil
		}
		return m, cmd

	case key.Matches(msg, m.keys.Status):
		m.clearStatus()
		t, ok := m.tickets.Selected()
		if !ok {
			m.setError(fmt.Errorf("no ticket selected"))
			return m, nil
		}
		m.statusMenu = views.NewStatusMenu(t.Status, m.width, views.StatusMenuStyles{
			Box:      m.styles.StatusMenuBox,
			Title:    m.styles.StatusMenuTitle,
			Selected: m.styles.StatusMenuSelected,
			Normal:   m.styles.StatusMenuNormal,
		})
		m.mode = ModeStatus
		return m, nil

	case key.Matches(msg, m.keys.Timer):
		m.clearStatus()
		cmd, err := m.toggleTimer()
		if err != nil {
			m.setError(err)
			return m, nil
		}
		return m, cmd

	case key.Matches(msg, m.keys.TimeManual):
		m.clearStatus()
		if _, ok := m.tickets.Selected(); !ok {
			m.setError(fmt.Errorf("no ticket selected"))
			return m, nil
		}
		m.mode = ModeTimeManual
		m.input = views.NewTimeManualInput()
		m.input.Focus()
		return m, textinput.Blink

	case key.Matches(msg, m.keys.Report):
		m.clearStatus()
		if err := m.openReport(); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeReport
		return m, nil

	case key.Matches(msg, m.keys.Sync):
		m.clearStatus()
		m.openSyncMenu(m.cfg.ActiveProject)
		return m, nil

	case key.Matches(msg, m.keys.TimeEntries):
		m.clearStatus()
		if err := m.openTimeEntries(); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeTimeEntries
		return m, nil

	case key.Matches(msg, m.keys.ChecklistNext):
		m.clearStatus()
		m.tickets.MoveChecklistDown()
		return m, nil

	case key.Matches(msg, m.keys.ChecklistPrev):
		m.clearStatus()
		m.tickets.MoveChecklistUp()
		return m, nil

	case key.Matches(msg, m.keys.Toggle):
		m.clearStatus()
		if err := m.toggleSelectedCheckbox(); err != nil {
			m.setError(err)
		}
		return m, nil

	case key.Matches(msg, m.keys.Down):
		m.tickets.MoveDown()
		return m, nil

	case key.Matches(msg, m.keys.Up):
		m.tickets.MoveUp()
		return m, nil
	}

	return m, nil
}

func (m Model) updateStatus(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		m.mode = ModeList
		m.clearStatus()
		return m, nil

	case key.Matches(msg, m.keys.Enter):
		if err := m.applyStatus(m.statusMenu.Selected()); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeList
		return m, nil

	case key.Matches(msg, m.keys.Down):
		m.statusMenu.MoveDown()
		return m, nil

	case key.Matches(msg, m.keys.Up):
		m.statusMenu.MoveUp()
		return m, nil
	}

	// Jump to option by first letter of its label (o/w/d).
	if msg.Type == tea.KeyRunes && len(msg.Runes) == 1 {
		if m.statusMenu.JumpToShortcut(msg.Runes[0]) {
			return m, nil
		}
	}
	return m, nil
}

func (m Model) updateBoard(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		m.mode = ModeList
		m.clearStatus()
		return m, nil

	case key.Matches(msg, m.keys.Enter):
		if err := m.applyBoardFilter(m.boardMenu.Selected()); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeList
		return m, nil

	case key.Matches(msg, m.keys.Toggle):
		m.boardMenu.Toggle()
		return m, nil

	case key.Matches(msg, m.keys.Down):
		m.boardMenu.MoveDown()
		return m, nil

	case key.Matches(msg, m.keys.Up):
		m.boardMenu.MoveUp()
		return m, nil
	}

	if msg.Type == tea.KeyRunes && len(msg.Runes) == 1 {
		if m.boardMenu.JumpToShortcut(msg.Runes[0]) {
			return m, nil
		}
	}
	return m, nil
}

func (m Model) updateConfirmDelete(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		wasProject := m.pendingDeleteProject != ""
		m.pendingDeleteTitle = ""
		m.pendingDeleteProject = ""
		m.clearStatus()
		if wasProject {
			m.mode = ModeProjects
		} else {
			m.mode = ModeList
		}
		return m, nil

	case key.Matches(msg, m.keys.Enter), key.Matches(msg, m.keys.ConfirmYes):
		if m.pendingDeleteProject != "" {
			id := m.pendingDeleteProject
			m.pendingDeleteTitle = ""
			m.pendingDeleteProject = ""
			if err := m.deleteProject(id); err != nil {
				m.setError(err)
				m.mode = ModeProjects
				return m, nil
			}
			m.mode = ModeList
			m.setStatus(fmt.Sprintf("deleted project %s", id))
			return m, nil
		}
		m.pendingDeleteTitle = ""
		m.mode = ModeList
		if err := m.deleteSelected(); err != nil {
			m.setError(err)
		} else {
			m.setStatus("deleted")
		}
		return m, nil
	}
	return m, nil
}

func (m Model) updateInput(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		wasProject := m.creatingProject
		m.creatingProject = false
		m.input.Blur()
		m.clearStatus()
		switch {
		case wasProject:
			m.mode = ModeProjects
		default:
			m.mode = ModeList
		}
		return m, nil

	case key.Matches(msg, m.keys.EditInEditor):
		if m.mode != ModeCreate || m.creatingProject {
			break
		}
		m.clearStatus()
		cmd, err := m.openEditorForNewTicket()
		if err != nil {
			m.setError(err)
			return m, nil
		}
		m.input.Blur()
		m.mode = ModeList
		return m, cmd

	case key.Matches(msg, m.keys.Enter):
		value := strings.TrimSpace(m.input.Value())
		if m.mode == ModeTimeManual {
			if err := m.addManualTime(value); err != nil {
				m.setError(err)
				return m, nil
			}
			m.mode = ModeList
			m.input.Blur()
			m.setStatus("time logged")
			return m, nil
		}
		if m.mode == ModeCreate {
			if value == "" {
				m.setError(fmt.Errorf("name required"))
				return m, nil
			}
			if m.creatingProject {
				id := sanitizeProjectID(value)
				if err := m.projects.Ensure(id); err != nil {
					m.setError(err)
					return m, nil
				}
				if err := m.switchProject(id); err != nil {
					m.setError(err)
					return m, nil
				}
				m.creatingProject = false
				m.mode = ModeList
				m.input.Blur()
				m.setStatus(fmt.Sprintf("created project %s", id))
				return m, nil
			}
			if _, err := m.createTicket(value, ""); err != nil {
				m.setError(err)
				return m, nil
			}
			m.mode = ModeList
			m.input.Blur()
			m.setStatus("created")
			return m, nil
		}
		m.filter = value
		m.applyFilter()
		m.mode = ModeList
		m.input.Blur()
		if value == "" {
			m.setStatus("filter cleared")
		} else {
			m.setStatus(fmt.Sprintf("filter: %q", value))
		}
		return m, nil
	}

	var cmd tea.Cmd
	m.input, cmd = m.input.Update(msg)
	return m, cmd
}

func (m Model) updateTimeEntries(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		m.timeEntriesTicket = ""
		m.mode = ModeList
		m.clearStatus()
		return m, nil

	case key.Matches(msg, m.keys.Down):
		m.timeEntries.MoveDown()
		return m, nil

	case key.Matches(msg, m.keys.Up):
		m.timeEntries.MoveUp()
		return m, nil

	case key.Matches(msg, m.keys.Delete), key.Matches(msg, m.keys.DeleteForce):
		m.clearStatus()
		if err := m.deleteSelectedTimeEntry(); err != nil {
			m.setError(err)
		} else {
			m.setStatus("time entry deleted")
		}
		return m, nil

	case key.Matches(msg, m.keys.Edit):
		m.clearStatus()
		e, ok := m.timeEntries.Selected()
		if !ok {
			m.setError(fmt.Errorf("no entry selected"))
			return m, nil
		}
		m.editingTimeEntry = e
		m.timeEdit = views.NewTimeEditForm(e, m.width)
		m.mode = ModeTimeEdit
		return m, textinput.Blink

	case key.Matches(msg, m.keys.Undo):
		m.clearStatus()
		if err := m.undo(); err != nil {
			m.setError(err)
			return m, nil
		}
		if err := m.openTimeEntriesFor(m.timeEntriesTicket); err != nil {
			m.setError(err)
		}
		return m, nil

	case key.Matches(msg, m.keys.Redo):
		m.clearStatus()
		if err := m.redo(); err != nil {
			m.setError(err)
			return m, nil
		}
		if err := m.openTimeEntriesFor(m.timeEntriesTicket); err != nil {
			m.setError(err)
		}
		return m, nil
	}
	return m, nil
}

func (m Model) updateReport(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		m.mode = ModeList
		m.clearStatus()
		return m, nil

	case key.Matches(msg, m.keys.Down):
		m.report.MoveDown()
		return m, nil

	case key.Matches(msg, m.keys.Up):
		m.report.MoveUp()
		return m, nil
	}

	if msg.Type == tea.KeyRunes && len(msg.Runes) == 1 {
		switch msg.Runes[0] {
		case 'g', 'G':
			m.groupByMenu = views.NewGroupByMenu(m.reportGroupBy, m.width, views.StatusMenuStyles{
				Box:      m.styles.StatusMenuBox,
				Title:    m.styles.StatusMenuTitle,
				Selected: m.styles.StatusMenuSelected,
				Normal:   m.styles.StatusMenuNormal,
			})
			m.mode = ModeReportGroup
			return m, nil
		}
	}
	return m, nil
}

func (m Model) updateReportGroup(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		m.mode = ModeReport
		m.clearStatus()
		return m, nil

	case key.Matches(msg, m.keys.Enter):
		m.reportGroupBy = m.groupByMenu.Selected()
		if err := m.openReport(); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeReport
		return m, nil

	case key.Matches(msg, m.keys.Down):
		m.groupByMenu.MoveDown()
		return m, nil

	case key.Matches(msg, m.keys.Up):
		m.groupByMenu.MoveUp()
		return m, nil
	}

	if msg.Type == tea.KeyRunes && len(msg.Runes) == 1 {
		if m.groupByMenu.JumpToShortcut(msg.Runes[0]) {
			return m, nil
		}
	}
	return m, nil
}

func (m Model) updateEditProject(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		m.mode = ModeProjects
		m.clearStatus()
		return m, nil

	case key.Matches(msg, m.keys.Tab):
		m.projectEdit.NextField()
		return m, textinput.Blink

	case key.Matches(msg, m.keys.ShiftTab):
		m.projectEdit.PrevField()
		return m, textinput.Blink

	case msg.Type == tea.KeyDown:
		m.projectEdit.NextField()
		return m, textinput.Blink

	case msg.Type == tea.KeyUp:
		m.projectEdit.PrevField()
		return m, textinput.Blink

	case msg.Type == tea.KeyLeft:
		m.projectEdit.CycleBackend(-1)
		return m, nil

	case msg.Type == tea.KeyRight:
		m.projectEdit.CycleBackend(1)
		return m, nil

	case key.Matches(msg, m.keys.Enter):
		if err := m.projectEdit.Validate(m.projectEditMeta); err != nil {
			m.setError(err)
			return m, nil
		}
		meta := m.projectEdit.Meta(m.projectEditMeta)
		id := m.projectEdit.ProjectID
		if err := m.projects.SaveMeta(id, meta); err != nil {
			m.setError(err)
			return m, nil
		}
		if err := m.openProjects(); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeProjects
		if meta.SyncConfigured() {
			m.setStatus(fmt.Sprintf("saved %s sync for %s", meta.EffectiveBackend(), id))
		} else {
			m.setStatus(fmt.Sprintf("cleared sync settings for %s", id))
		}
		return m, nil
	}

	cmd := m.projectEdit.Update(msg)
	return m, cmd
}

func (m *Model) openProjectEdit(projectID string) error {
	meta, err := m.projects.LoadMeta(projectID)
	if err != nil {
		return err
	}
	m.projectEditMeta = meta
	m.projectEdit = views.NewProjectEditForm(projectID, meta, m.width)
	return nil
}

func (m *Model) openSyncMenu(projectID string) {
	m.syncProjectID = projectID
	label := "Sync"
	if meta, err := m.projects.LoadMeta(projectID); err == nil {
		switch meta.EffectiveBackend() {
		case project.BackendTaskMaster:
			label = "task-master"
		case project.BackendYouTrack:
			label = "YouTrack"
		}
	}
	m.syncMenu = views.NewSyncMenu(m.width, views.StatusMenuStyles{
		Box:      m.styles.StatusMenuBox,
		Title:    m.styles.StatusMenuTitle,
		Selected: m.styles.StatusMenuSelected,
		Normal:   m.styles.StatusMenuNormal,
	}, label)
	m.mode = ModeSync
}

func (m Model) updateSync(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		m.mode = ModeList
		m.clearStatus()
		return m, nil

	case key.Matches(msg, m.keys.Enter):
		action := m.syncMenu.Selected()
		m.mode = ModeList
		return m.startSyncAction(m.syncProjectID, action)

	case key.Matches(msg, m.keys.Down):
		m.syncMenu.MoveDown()
		return m, nil

	case key.Matches(msg, m.keys.Up):
		m.syncMenu.MoveUp()
		return m, nil
	}

	if msg.Type == tea.KeyRunes && len(msg.Runes) == 1 {
		if m.syncMenu.JumpToShortcut(msg.Runes[0]) {
			action := m.syncMenu.Selected()
			m.mode = ModeList
			return m.startSyncAction(m.syncProjectID, action)
		}
	}
	return m, nil
}

func (m Model) startSyncAction(projectID string, action views.SyncAction) (tea.Model, tea.Cmd) {
	if m.syncing {
		m.setStatus("sync already running…")
		return m, nil
	}
	if m.remote == nil {
		m.setError(fmt.Errorf("daemon client not available"))
		return m, nil
	}
	m.clearStatus()
	m.syncing = true
	switch action {
	case views.SyncActionPush:
		m.setStatus(fmt.Sprintf("pushing %s…", projectID))
	default:
		m.setStatus(fmt.Sprintf("pulling %s…", projectID))
	}
	remote := m.remote
	return m, func() tea.Msg {
		var pull, push ytsync.Result
		var err error
		switch action {
		case views.SyncActionPush:
			push, err = remote.SyncPush(projectID)
		default:
			pull, err = remote.SyncPull(projectID)
		}
		return syncFinishedMsg{projectID: projectID, action: action, pull: pull, push: push, err: err}
	}
}

func (m Model) updateMoveTicket(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		m.mode = ModeList
		m.clearStatus()
		return m, nil

	case key.Matches(msg, m.keys.Enter):
		item, ok := m.projectList.SelectedItem().(views.ProjectItem)
		if !ok {
			return m, nil
		}
		if err := m.moveSelectedToProject(item.Project.ID); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeList
		return m, nil
	}

	if msg.Type == tea.KeyRunes && len(msg.Runes) == 1 {
		if views.JumpProjectByLetter(&m.projectList, msg.Runes[0]) {
			return m, nil
		}
	}

	var cmd tea.Cmd
	m.projectList, cmd = m.projectList.Update(msg)
	return m, cmd
}

func (m Model) updateProjects(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		m.mode = ModeList
		m.clearStatus()
		return m, nil

	case key.Matches(msg, m.keys.New):
		m.clearStatus()
		m.creatingProject = true
		m.mode = ModeCreate
		m.input = views.NewCreateInput()
		m.input.Placeholder = "Project name…"
		m.input.Focus()
		return m, textinput.Blink

	case key.Matches(msg, m.keys.Edit):
		m.clearStatus()
		item, ok := m.projectList.SelectedItem().(views.ProjectItem)
		if !ok {
			m.setError(fmt.Errorf("no project selected"))
			return m, nil
		}
		if err := m.openProjectEdit(item.Project.ID); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeEditProject
		return m, textinput.Blink

	case key.Matches(msg, m.keys.Sync):
		item, ok := m.projectList.SelectedItem().(views.ProjectItem)
		if !ok {
			m.setError(fmt.Errorf("no project selected"))
			return m, nil
		}
		m.clearStatus()
		m.openSyncMenu(item.Project.ID)
		return m, nil

	case key.Matches(msg, m.keys.MCPToken):
		item, ok := m.projectList.SelectedItem().(views.ProjectItem)
		if !ok {
			m.setError(fmt.Errorf("no project selected"))
			return m, nil
		}
		if m.remote == nil {
			m.setError(fmt.Errorf("daemon client not available"))
			return m, nil
		}
		token, _, err := m.remote.CreateMCPToken(item.Project.ID)
		if err != nil {
			m.setError(err)
			return m, nil
		}
		m.setStatus(fmt.Sprintf("MCP token for %s (save as .tm_token): project=%s token=%s", item.Project.ID, item.Project.ID, token))
		return m, nil

	case key.Matches(msg, m.keys.MCPTokenRevoke):
		item, ok := m.projectList.SelectedItem().(views.ProjectItem)
		if !ok {
			m.setError(fmt.Errorf("no project selected"))
			return m, nil
		}
		if m.remote == nil {
			m.setError(fmt.Errorf("daemon client not available"))
			return m, nil
		}
		if err := m.remote.RevokeMCPToken(item.Project.ID); err != nil {
			m.setError(err)
			return m, nil
		}
		m.setStatus(fmt.Sprintf("revoked MCP token for %s", item.Project.ID))
		return m, nil

	case key.Matches(msg, m.keys.DeleteForce):
		m.clearStatus()
		item, ok := m.projectList.SelectedItem().(views.ProjectItem)
		if !ok {
			m.setError(fmt.Errorf("no project selected"))
			return m, nil
		}
		if err := m.deleteProject(item.Project.ID); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeList
		m.setStatus(fmt.Sprintf("deleted project %s", item.Project.ID))
		return m, nil

	case key.Matches(msg, m.keys.Delete):
		m.clearStatus()
		item, ok := m.projectList.SelectedItem().(views.ProjectItem)
		if !ok {
			m.setError(fmt.Errorf("no project selected"))
			return m, nil
		}
		n, err := m.countTickets(item.Project.ID)
		if err != nil {
			m.setError(err)
			return m, nil
		}
		m.pendingDeleteProject = item.Project.ID
		m.pendingDeleteTitle = fmt.Sprintf("project %q (%d tickets)", item.Project.ID, n)
		m.mode = ModeConfirmDelete
		return m, nil

	case key.Matches(msg, m.keys.Enter):
		item, ok := m.projectList.SelectedItem().(views.ProjectItem)
		if !ok {
			return m, nil
		}
		if err := m.switchProject(item.Project.ID); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeList
		m.setStatus(fmt.Sprintf("switched to %s", item.Project.ID))
		return m, nil
	}

	if msg.Type == tea.KeyRunes && len(msg.Runes) == 1 {
		if views.JumpProjectByLetter(&m.projectList, msg.Runes[0]) {
			return m, nil
		}
	}

	var cmd tea.Cmd
	m.projectList, cmd = m.projectList.Update(msg)
	return m, cmd
}

func (m Model) openEditorForSelected() (tea.Cmd, error) {
	t, ok := m.tickets.Selected()
	if !ok {
		return nil, fmt.Errorf("no ticket selected")
	}
	path, err := ticket.WriteEditFile(t)
	if err != nil {
		return nil, err
	}
	c := ticket.EditorCmd(path)
	ticketID := t.ID
	return tea.ExecProcess(c, func(err error) tea.Msg {
		return editorFinishedMsg{ticketID: ticketID, path: path, err: err}
	}), nil
}

func (m Model) openEditorForNewTicket() (tea.Cmd, error) {
	title := strings.TrimSpace(m.input.Value())
	if title == "" {
		title = "New ticket"
	}
	path, err := ticket.WriteEditFile(ticket.Ticket{Title: title})
	if err != nil {
		return nil, err
	}
	c := ticket.EditorCmd(path)
	return tea.ExecProcess(c, func(err error) tea.Msg {
		return editorFinishedMsg{path: path, err: err, create: true}
	}), nil
}

func (m Model) handleEditorFinished(msg editorFinishedMsg) (tea.Model, tea.Cmd) {
	defer func() { _ = os.Remove(msg.path) }()

	if msg.err != nil {
		m.setError(fmt.Errorf("editor: %w", msg.err))
		return m, nil
	}

	data, err := os.ReadFile(msg.path)
	if err != nil {
		m.setError(fmt.Errorf("read edited file: %w", err))
		return m, nil
	}
	title, description, err := ticket.ParseEditDocument(string(data))
	if err != nil {
		m.setError(err)
		return m, nil
	}

	if msg.create {
		if _, err := m.createTicket(title, description); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeList
		m.setStatus("created")
		return m, nil
	}

	before, err := m.store.Get(msg.ticketID)
	if err != nil {
		m.setError(err)
		return m, nil
	}
	after := before
	after.Title = title
	after.Description = description
	if err := m.exec.Do(&command.UpdateTicket{
		Store:  m.store,
		Before: before,
		After:  after,
	}); err != nil {
		m.setError(err)
		return m, nil
	}
	idx := m.tickets.CursorIndex()
	if err := m.reloadTickets(); err != nil {
		m.setError(err)
		return m, nil
	}
	if idx < m.tickets.Len() {
		m.tickets.Select(idx)
	}
	m.setStatus("saved")
	return m, nil
}

func (m *Model) createTicket(title, description string) (ticket.Ticket, error) {
	cmd := &command.CreateTicket{
		Store: m.store,
		Ticket: ticket.Ticket{
			Title:       title,
			Description: description,
			ProjectID:   m.cfg.ActiveProject,
			Status:      m.boardFilter.DefaultStatus(),
		},
	}
	if err := m.exec.Do(cmd); err != nil {
		return ticket.Ticket{}, err
	}
	if err := m.reloadTickets(); err != nil {
		return ticket.Ticket{}, err
	}
	return cmd.Ticket, nil
}

func (m *Model) deleteSelected() error {
	t, ok := m.tickets.Selected()
	if !ok {
		return fmt.Errorf("no ticket selected")
	}
	idx := m.tickets.CursorIndex()
	if err := m.exec.Do(&command.DeleteTicket{Store: m.store, Snapshot: t}); err != nil {
		return err
	}
	if err := m.reloadTickets(); err != nil {
		return err
	}
	if idx >= m.tickets.Len() && m.tickets.Len() > 0 {
		m.tickets.Select(m.tickets.Len() - 1)
	} else if idx < m.tickets.Len() {
		m.tickets.Select(idx)
	}
	return nil
}

func (m *Model) applyStatus(st ticket.Status) error {
	t, ok := m.tickets.Selected()
	if !ok {
		return fmt.Errorf("no ticket selected")
	}
	after := t
	after.Status = st
	if err := m.exec.Do(&command.UpdateTicket{
		Store:  m.store,
		Before: t,
		After:  after,
	}); err != nil {
		return err
	}
	idx := m.tickets.CursorIndex()
	if err := m.reloadTickets(); err != nil {
		return err
	}
	if idx < m.tickets.Len() {
		m.tickets.Select(idx)
	}
	m.setStatus(fmt.Sprintf("status → %s", st.Label()))
	return nil
}

func (m *Model) toggleSelectedCheckbox() error {
	t, ok := m.tickets.Selected()
	if !ok {
		return fmt.Errorf("no ticket selected")
	}
	boxes := ticket.ListCheckboxes(t.Description)
	if len(boxes) == 0 {
		return fmt.Errorf("no checkboxes in description")
	}
	checkIdx := m.tickets.ChecklistCursor
	if checkIdx < 0 || checkIdx >= len(boxes) {
		checkIdx = 0
	}
	newDesc, err := ticket.ToggleCheckbox(t.Description, checkIdx)
	if err != nil {
		return err
	}
	after := t
	after.Description = newDesc
	if err := m.exec.Do(&command.UpdateTicket{
		Store:  m.store,
		Before: t,
		After:  after,
	}); err != nil {
		return err
	}
	ticketIdx := m.tickets.CursorIndex()
	if err := m.reloadTickets(); err != nil {
		return err
	}
	if ticketIdx < m.tickets.Len() {
		m.tickets.Select(ticketIdx)
	}
	m.tickets.SetChecklistCursor(checkIdx)
	state := "unchecked"
	if !boxes[checkIdx].Checked {
		state = "checked"
	}
	label := strings.TrimSpace(boxes[checkIdx].Text)
	if label == "" {
		label = fmt.Sprintf("#%d", checkIdx+1)
	}
	m.setStatus(fmt.Sprintf("%s %s", state, label))
	return nil
}

func (m *Model) undo() error {
	name := m.exec.LastUndoName()
	if err := m.exec.Undo(); err != nil {
		return err
	}
	if err := m.reloadTickets(); err != nil {
		return err
	}
	if name != "" {
		m.setStatus("undo: " + name)
	} else {
		m.setStatus("undo")
	}
	return nil
}

func (m *Model) redo() error {
	name := m.exec.LastRedoName()
	if err := m.exec.Redo(); err != nil {
		return err
	}
	if err := m.reloadTickets(); err != nil {
		return err
	}
	if name != "" {
		m.setStatus("redo: " + name)
	} else {
		m.setStatus("redo")
	}
	return nil
}

func (m *Model) applyBoardFilter(f ticket.BoardFilter) error {
	m.boardFilter = ticket.NormalizeFilter(f)
	m.cfg.SetActiveBoardLists(m.cfg.ActiveProject, ticket.FormatBoardLists(m.boardFilter))
	if err := config.Save(m.cfg); err != nil {
		return err
	}
	m.applyFilter()
	m.setStatus(fmt.Sprintf("list → %s", m.boardFilter.Label()))
	return nil
}

func (m *Model) switchProject(id string) error {
	if err := m.projects.Ensure(id); err != nil {
		return err
	}
	m.cfg.ActiveProject = id
	m.boardFilter = ticket.ParseBoardLists(m.cfg.ActiveBoardLists(id))
	if err := config.Save(m.cfg); err != nil {
		return err
	}
	m.filter = ""
	return m.reloadTickets()
}

func (m *Model) moveSelectedToProject(toProjectID string) error {
	t, ok := m.tickets.Selected()
	if !ok {
		return fmt.Errorf("no ticket selected")
	}
	if toProjectID == t.ProjectID {
		m.setStatus("already there")
		return nil
	}
	if err := m.projects.Ensure(toProjectID); err != nil {
		return err
	}
	after := t
	after.ProjectID = toProjectID
	if err := m.exec.Do(&command.MoveTicket{
		Store:     m.store,
		TimeStore: m.timeStore,
		Before:    t,
		After:     after,
	}); err != nil {
		return err
	}
	if m.activeTimer != nil && m.activeTimer.TicketID == t.ID && m.timeStore != nil {
		m.activeTimer.ProjectID = toProjectID
		if err := m.timeStore.SaveActiveTimer(m.activeTimer); err != nil {
			return err
		}
	}
	if err := m.reloadTickets(); err != nil {
		return err
	}
	m.setStatus(fmt.Sprintf("moved → %s", toProjectID))
	return nil
}

func (m *Model) countTickets(projectID string) (int, error) {
	tickets, err := m.store.List(projectID)
	if err != nil {
		return 0, err
	}
	return len(tickets), nil
}

func (m *Model) deleteProject(id string) error {
	if id == "" {
		return fmt.Errorf("no project selected")
	}
	all, err := m.projects.List()
	if err != nil {
		return err
	}
	if len(all) <= 1 {
		return fmt.Errorf("cannot delete the last project")
	}

	wasActive := m.cfg.ActiveProject == id

	// Clear running timer if it belongs to this project.
	if m.activeTimer != nil && m.activeTimer.ProjectID == id && m.timeStore != nil {
		if err := m.timeStore.SaveActiveTimer(nil); err != nil {
			return err
		}
		m.activeTimer = nil
	}

	if m.timeStore != nil {
		if err := m.timeStore.DeleteByProject(id); err != nil {
			return err
		}
	}
	if err := m.projects.Delete(id); err != nil {
		return err
	}

	m.cfg.ClearProjectLists(id)
	if wasActive {
		next := pickFallbackProject(all, id)
		m.cfg.ActiveProject = next
		m.boardFilter = ticket.ParseBoardLists(m.cfg.ActiveBoardLists(next))
		m.filter = ""
	}
	if err := config.Save(m.cfg); err != nil {
		return err
	}
	if err := m.openProjects(); err != nil {
		return err
	}
	return m.reloadTickets()
}

func pickFallbackProject(all []project.Project, deletedID string) string {
	var rest []string
	for _, p := range all {
		if p.ID == deletedID {
			continue
		}
		rest = append(rest, p.ID)
	}
	for _, id := range rest {
		if id == config.DefaultProject {
			return id
		}
	}
	if len(rest) > 0 {
		return rest[0]
	}
	return config.DefaultProject
}

func (m *Model) openProjects() error {
	projects, err := m.projects.List()
	if err != nil {
		return err
	}
	if len(projects) == 0 {
		if err := m.projects.Ensure(m.cfg.ActiveProject); err != nil {
			return err
		}
		projects, err = m.projects.List()
		if err != nil {
			return err
		}
	}
	headerH, footerH := 1, 1
	bodyH := m.height - headerH - footerH
	if bodyH < 1 {
		bodyH = 1
	}
	yt := make(map[string]bool, len(projects))
	for _, p := range projects {
		meta, err := m.projects.LoadMeta(p.ID)
		if err != nil {
			return err
		}
		yt[p.ID] = meta.SyncConfigured()
	}
	m.projectList = views.NewProjectListWithYT(projects, m.cfg.ActiveProject, yt, m.width, bodyH)
	return nil
}

func (m *Model) reloadTickets() error {
	tickets, err := m.store.List(m.cfg.ActiveProject)
	if err != nil {
		return err
	}
	m.allTickets = tickets
	if err := m.reloadSpent(); err != nil {
		return err
	}
	m.applyFilter()
	return nil
}

func (m *Model) reloadSpent() error {
	m.spentByID = map[string]time.Duration{}
	if m.timeStore == nil {
		m.tickets.SpentByID = m.spentByID
		return nil
	}
	for _, t := range m.allTickets {
		sum, err := m.timeStore.SumByTicket(t.ID)
		if err != nil {
			return err
		}
		if sum > 0 {
			m.spentByID[t.ID] = sum
		}
	}
	m.tickets.SpentByID = m.spentByID
	return nil
}

func (m *Model) toggleTimer() (tea.Cmd, error) {
	if m.timeStore == nil {
		return nil, fmt.Errorf("time store not configured")
	}
	sel, ok := m.tickets.Selected()
	if !ok {
		return nil, fmt.Errorf("no ticket selected")
	}

	if m.activeTimer == nil {
		t := &ticket.ActiveTimer{
			TicketID:  sel.ID,
			ProjectID: sel.ProjectID,
			StartedAt: time.Now().UTC(),
		}
		if err := m.timeStore.SaveActiveTimer(t); err != nil {
			return nil, err
		}
		m.activeTimer = t
		m.setStatus("timer started")
		return timerTickCmd(), nil
	}

	// Stop current timer (same or other ticket).
	stoppedID := m.activeTimer.TicketID
	if err := m.stopActiveTimer(); err != nil {
		return nil, err
	}
	m.setStatus("timer stopped")

	// If selection is a different ticket, start a new timer there.
	if sel.ID != stoppedID {
		t := &ticket.ActiveTimer{
			TicketID:  sel.ID,
			ProjectID: sel.ProjectID,
			StartedAt: time.Now().UTC(),
		}
		if err := m.timeStore.SaveActiveTimer(t); err != nil {
			return nil, err
		}
		m.activeTimer = t
		m.setStatus("timer switched")
		return timerTickCmd(), nil
	}
	return nil, nil
}

func (m *Model) stopActiveTimer() error {
	if m.activeTimer == nil || m.timeStore == nil {
		return nil
	}
	now := time.Now().UTC()
	start := m.activeTimer.StartedAt
	dur := now.Sub(start)
	if dur < time.Second {
		dur = time.Second
	}
	entry := ticket.TimeEntry{
		TicketID:  m.activeTimer.TicketID,
		ProjectID: m.activeTimer.ProjectID,
		Start:     start,
		End:       now,
		Duration:  dur,
		Source:    ticket.SourceTimer,
	}
	if err := m.exec.Do(&command.AddTimeEntry{Store: m.timeStore, Entry: entry}); err != nil {
		return err
	}
	if err := m.timeStore.SaveActiveTimer(nil); err != nil {
		return err
	}
	m.activeTimer = nil
	return m.reloadSpent()
}

func (m *Model) addManualTime(raw string) error {
	if m.timeStore == nil {
		return fmt.Errorf("time store not configured")
	}
	sel, ok := m.tickets.Selected()
	if !ok {
		return fmt.Errorf("no ticket selected")
	}
	dur, err := ticket.ParseDurationFlexible(raw)
	if err != nil {
		return err
	}
	end := time.Now().UTC()
	start := end.Add(-dur)
	entry := ticket.TimeEntry{
		TicketID:  sel.ID,
		ProjectID: sel.ProjectID,
		Start:     start,
		End:       end,
		Duration:  dur,
		Source:    ticket.SourceManual,
	}
	if err := m.exec.Do(&command.AddTimeEntry{Store: m.timeStore, Entry: entry}); err != nil {
		return err
	}
	return m.reloadSpent()
}

func (m *Model) openTimeEntries() error {
	sel, ok := m.tickets.Selected()
	if !ok {
		return fmt.Errorf("no ticket selected")
	}
	return m.openTimeEntriesFor(sel.ID)
}

func (m *Model) openTimeEntriesFor(ticketID string) error {
	if m.timeStore == nil {
		return fmt.Errorf("time store not configured")
	}
	if ticketID == "" {
		return fmt.Errorf("no ticket selected")
	}
	entries, err := m.timeStore.ListByTicket(ticketID)
	if err != nil {
		return err
	}
	title := ticketID
	if t, err := m.store.Get(ticketID); err == nil {
		title = strings.TrimSpace(t.Title)
		title = strings.TrimLeft(title, "#")
		title = strings.TrimSpace(title)
	}
	headerH, footerH := 1, 2
	bodyH := m.height - headerH - footerH
	if bodyH < 1 {
		bodyH = 1
	}
	prevCursor := m.timeEntries.Cursor
	m.timeEntriesTicket = ticketID
	m.timeEntries = views.NewTimeEntriesView(title, entries, m.width, bodyH, views.TimeEntriesStyles{
		Title:    m.styles.StatusMenuTitle,
		Row:      m.styles.StatusMenuNormal,
		Selected: m.styles.StatusMenuSelected,
		Meta:     m.styles.HeaderMeta,
		Total:    m.styles.Headline,
		Hint:     m.styles.HelpDesc,
		Empty:    m.styles.HelpDesc,
	})
	if prevCursor < m.timeEntries.Len() {
		m.timeEntries.Cursor = prevCursor
		m.timeEntries.SetSize(m.width, bodyH)
	}
	return nil
}

func (m *Model) deleteSelectedTimeEntry() error {
	e, ok := m.timeEntries.Selected()
	if !ok {
		return fmt.Errorf("no entry selected")
	}
	// If synced to YouTrack, remove the remote work item first so the next
	// pull does not resurrect it.
	if e.ExternalID != "" {
		if err := m.deleteRemoteWorkItem(e); err != nil {
			return err
		}
	}
	if err := m.exec.Do(&command.RemoveTimeEntry{Store: m.timeStore, Snapshot: e}); err != nil {
		return err
	}
	if err := m.reloadSpent(); err != nil {
		return err
	}
	return m.openTimeEntriesFor(m.timeEntriesTicket)
}

func (m *Model) deleteRemoteWorkItem(e ticket.TimeEntry) error {
	tk, err := m.store.Get(e.TicketID)
	if err != nil {
		return fmt.Errorf("resolve ticket for work item: %w", err)
	}
	if tk.ExternalID == "" {
		return nil
	}
	meta, err := m.projects.LoadMeta(tk.ProjectID)
	if err != nil {
		return err
	}
	if meta.YouTrack == nil || !meta.YouTrack.Configured() {
		return nil
	}
	client := &youtrack.Client{BaseURL: meta.YouTrack.BaseURL, Token: meta.YouTrack.Token}
	if err := client.DeleteWorkItem(context.Background(), tk.ExternalID, e.ExternalID); err != nil {
		return fmt.Errorf("delete YouTrack work item: %w", err)
	}
	return nil
}

func (m Model) updateTimeEdit(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch {
	case key.Matches(msg, m.keys.Escape):
		m.mode = ModeTimeEntries
		m.clearStatus()
		return m, nil

	case key.Matches(msg, m.keys.Tab), msg.Type == tea.KeyDown:
		m.timeEdit.NextField()
		return m, textinput.Blink

	case key.Matches(msg, m.keys.ShiftTab), msg.Type == tea.KeyUp:
		m.timeEdit.PrevField()
		return m, textinput.Blink

	case key.Matches(msg, m.keys.Enter):
		m.clearStatus()
		if err := m.saveEditedTime(); err != nil {
			m.setError(err)
			return m, nil
		}
		m.mode = ModeTimeEntries
		m.setStatus("time updated")
		return m, nil
	}

	cmd := m.timeEdit.Update(msg)
	return m, cmd
}

func (m *Model) saveEditedTime() error {
	if m.timeStore == nil {
		return fmt.Errorf("time store not configured")
	}
	start, end, err := m.timeEdit.Parse()
	if err != nil {
		return err
	}
	before := m.editingTimeEntry
	after := before
	after.Start = start
	after.End = end
	after.Duration = end.Sub(start)
	if err := m.exec.Do(&command.UpdateTimeEntry{
		Store:  m.timeStore,
		Before: before,
		After:  after,
	}); err != nil {
		return err
	}
	if err := m.reloadSpent(); err != nil {
		return err
	}
	return m.openTimeEntriesFor(m.timeEntriesTicket)
}

func (m *Model) openReport() error {
	if m.timeStore == nil {
		return fmt.Errorf("time store not configured")
	}
	entries, err := m.timeStore.List()
	if err != nil {
		return err
	}
	byID, err := m.allTicketsByID()
	if err != nil {
		return err
	}
	rows := ticket.Aggregate(entries, byID, m.reportGroupBy)
	total := ticket.TotalDuration(entries)
	headerH, footerH := 1, 2
	bodyH := m.height - headerH - footerH
	if bodyH < 1 {
		bodyH = 1
	}
	m.report = views.NewReportView(rows, total, m.reportGroupBy, m.width, bodyH, views.ReportStyles{
		Title:    m.styles.StatusMenuTitle,
		Group:    m.styles.StatusMenuNormal,
		Duration: m.styles.HeaderMeta,
		Total:    m.styles.Headline,
		Hint:     m.styles.HelpDesc,
		Selected: m.styles.StatusMenuSelected,
	})
	return nil
}

func (m *Model) allTicketsByID() (map[string]ticket.Ticket, error) {
	out := map[string]ticket.Ticket{}
	projects, err := m.projects.List()
	if err != nil {
		return nil, err
	}
	for _, p := range projects {
		list, err := m.store.List(p.ID)
		if err != nil {
			return nil, err
		}
		for _, t := range list {
			out[t.ID] = t
		}
	}
	return out, nil
}

func (m Model) timerHeaderLabel() string {
	if m.activeTimer == nil {
		return ""
	}
	title := m.activeTimer.TicketID
	if t, err := m.store.Get(m.activeTimer.TicketID); err == nil {
		title = strings.TrimSpace(t.Title)
		title = strings.TrimLeft(title, "#")
		title = strings.TrimSpace(title)
		if lipgloss.Width(title) > 24 {
			runes := []rune(title)
			for len(runes) > 0 && lipgloss.Width(string(runes)) > 23 {
				runes = runes[:len(runes)-1]
			}
			title = string(runes) + "…"
		}
	}
	elapsed := time.Since(m.activeTimer.StartedAt)
	return fmt.Sprintf("timer: %s %s", title, ticket.FormatDurationHuman(elapsed))
}

func (m *Model) applyFilter() {
	filtered := make([]ticket.Ticket, 0, len(m.allTickets))
	for _, t := range m.allTickets {
		if m.boardFilter.Matches(t.Status) {
			filtered = append(filtered, t)
		}
	}
	filtered = views.FilterTickets(filtered, m.filter)
	cursor := m.tickets.CursorIndex()
	m.tickets.SetItems(filtered)
	if cursor < m.tickets.Len() {
		m.tickets.Select(cursor)
	}
}

func (m Model) ticketCount() int {
	return m.tickets.Len()
}

func (m *Model) setStatus(s string) {
	m.status = s
	m.statusIsError = false
}

func (m *Model) setError(err error) {
	m.status = err.Error()
	m.statusIsError = true
}

func (m *Model) clearStatus() {
	m.status = ""
	m.statusIsError = false
}

func sanitizeProjectID(name string) string {
	name = strings.TrimSpace(strings.ToLower(name))
	var b strings.Builder
	for _, r := range name {
		switch {
		case r >= 'a' && r <= 'z', r >= '0' && r <= '9', r == '-', r == '_':
			b.WriteRune(r)
		case r == ' ':
			b.WriteRune('-')
		}
	}
	id := b.String()
	if id == "" {
		return "project"
	}
	return id
}

func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}