package display

import (
	"context"
	"net/http"
	"net/http/httptest"
	"os"
	"reflect"
	"strings"
	"testing"
	"time"

	core "dappco.re/go/core"
	"forge.lthn.ai/core/gui/pkg/menu"
	"forge.lthn.ai/core/gui/pkg/systray"
	"forge.lthn.ai/core/gui/pkg/window"
	"github.com/gorilla/websocket"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// --- Test helpers ---

// newTestDisplayService creates a display service registered with Core for IPC testing.
func newTestDisplayService(t *testing.T) (*Service, *core.Core) {
	t.Helper()
	c := core.New(
		core.WithService(Register(nil)),
		core.WithServiceLock(),
	)
	require.True(t, c.ServiceStartup(context.Background(), nil).OK)
	svc := core.MustServiceFor[*Service](c, "display")
	return svc, c
}

// newTestConclave creates a full 4-service conclave for integration testing.
func newTestConclave(t *testing.T) *core.Core {
	t.Helper()
	c := core.New(
		core.WithService(Register(nil)),
		core.WithService(window.Register(window.NewMockPlatform())),
		core.WithService(systray.Register(systray.NewMockPlatform())),
		core.WithService(menu.Register(menu.NewMockPlatform())),
		core.WithServiceLock(),
	)
	require.True(t, c.ServiceStartup(context.Background(), nil).OK)
	return c
}

func taskRun(c *core.Core, name string, task any) core.Result {
	return c.Action(name).Run(context.Background(), core.NewOptions(
		core.Option{Key: "task", Value: task},
	))
}

// --- Tests ---

func TestNew_Good(t *testing.T) {
	service, err := New()
	assert.NoError(t, err)
	assert.NotNil(t, service)
}

func TestNew_Good_IndependentInstances(t *testing.T) {
	service1, err1 := New()
	service2, err2 := New()
	assert.NoError(t, err1)
	assert.NoError(t, err2)
	assert.NotSame(t, service1, service2)
}

func TestRegister_Good(t *testing.T) {
	factory := Register(nil) // nil wailsApp for testing
	assert.NotNil(t, factory)

	c := core.New(
		core.WithService(factory),
		core.WithServiceLock(),
	)
	require.True(t, c.ServiceStartup(context.Background(), nil).OK)

	svc := core.MustServiceFor[*Service](c, "display")
	assert.NotNil(t, svc)
}

func TestConfigQuery_Good(t *testing.T) {
	svc, c := newTestDisplayService(t)

	// Set window config
	svc.configData["window"] = map[string]any{
		"default_width": 1024,
	}

	r := c.QUERY(window.QueryConfig{})
	require.True(t, r.OK)
	cfg := r.Value.(map[string]any)
	assert.Equal(t, 1024, cfg["default_width"])
}

func TestConfigQuery_Bad(t *testing.T) {
	// No display service — window config query returns handled=false
	c := core.New(core.WithServiceLock())
	r := c.QUERY(window.QueryConfig{})
	assert.False(t, r.OK)
}

func TestConfigTask_Good(t *testing.T) {
	_, c := newTestDisplayService(t)

	newCfg := map[string]any{"default_width": 800}
	r := taskRun(c, "display.saveWindowConfig", window.TaskSaveConfig{Config: newCfg})
	require.True(t, r.OK)

	// Verify config was saved
	r2 := c.QUERY(window.QueryConfig{})
	cfg := r2.Value.(map[string]any)
	assert.Equal(t, 800, cfg["default_width"])
}

func TestStorageTask_Bad(t *testing.T) {
	_, c := newTestDisplayService(t)

	r := c.Action("display.storage.set").Run(context.Background(), core.NewOptions(
		core.Option{Key: "origin", Value: "core://settings"},
		core.Option{Key: "bucket", Value: "localStorage"},
		core.Option{Key: "key", Value: strings.Repeat("k", maxStorageKeyBytes+1)},
		core.Option{Key: "value", Value: "dark"},
	))

	require.False(t, r.OK)
	assert.Contains(t, r.Value.(error).Error(), "invalid storage entry")
}

func TestResolveScheme_StoreRoute_Good(t *testing.T) {
	svc, _ := newTestDisplayService(t)

	result := svc.ResolveScheme(context.Background(), "core://store?q=alpha")
	require.True(t, result.OK)

	payload, ok := result.Value.(map[string]any)
	require.True(t, ok)
	assert.Equal(t, "text/html", payload["content_type"])

	body, ok := payload["body"].(string)
	require.True(t, ok)
	assert.Contains(t, body, "core://store")
	assert.Contains(t, body, "storage scopes")
	assert.Contains(t, body, "Search the in-memory storage scopes")
}

// --- Conclave integration tests ---

func TestServiceConclave_Good(t *testing.T) {
	c := newTestConclave(t)

	// Open a window via IPC
	r := taskRun(c, "window.open", window.TaskOpenWindow{
		Window: &window.Window{Name: "main"},
	})
	require.True(t, r.OK)
	info := r.Value.(window.WindowInfo)
	assert.Equal(t, "main", info.Name)

	// Query window config from display
	r2 := c.QUERY(window.QueryConfig{})
	require.True(t, r2.OK)
	assert.NotNil(t, r2.Value)

	// Set app menu via IPC
	r3 := taskRun(c, "menu.setAppMenu", menu.TaskSetAppMenu{Items: []menu.MenuItem{
		{Label: "File"},
	}})
	require.True(t, r3.OK)

	// Query app menu via IPC
	r4 := c.QUERY(menu.QueryGetAppMenu{})
	assert.True(t, r4.OK)
	items := r4.Value.([]menu.MenuItem)
	assert.Len(t, items, 1)
}

func TestServiceConclave_Bad(t *testing.T) {
	// Sub-service starts without display — config QUERY returns handled=false
	c := core.New(
		core.WithService(window.Register(window.NewMockPlatform())),
		core.WithServiceLock(),
	)
	require.True(t, c.ServiceStartup(context.Background(), nil).OK)

	r := c.QUERY(window.QueryConfig{})
	assert.False(t, r.OK, "no display service means no config handler")
}

// --- IPC delegation tests (full conclave) ---

func TestOpenWindow_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	t.Run("creates window with default options", func(t *testing.T) {
		err := svc.OpenWindow()
		assert.NoError(t, err)

		// Verify via IPC query
		infos := svc.ListWindowInfos()
		assert.GreaterOrEqual(t, len(infos), 1)
	})

	t.Run("creates window with custom options", func(t *testing.T) {
		err := svc.OpenWindow(
			window.WithName("custom-window"),
			window.WithTitle("Custom Title"),
			window.WithSize(640, 480),
			window.WithURL("/custom"),
		)
		assert.NoError(t, err)

		r := c.QUERY(window.QueryWindowByName{Name: "custom-window"})
		info := r.Value.(*window.WindowInfo)
		assert.Equal(t, "custom-window", info.Name)
	})
}

func TestGetWindowInfo_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	_ = svc.OpenWindow(
		window.WithName("test-win"),
		window.WithSize(800, 600),
	)

	// Modify position via IPC
	taskRun(c, "window.setPosition", window.TaskSetPosition{Name: "test-win", X: 100, Y: 200})

	info, err := svc.GetWindowInfo("test-win")
	require.NoError(t, err)
	assert.Equal(t, "test-win", info.Name)
	assert.Equal(t, 100, info.X)
	assert.Equal(t, 200, info.Y)
	assert.Equal(t, 800, info.Width)
	assert.Equal(t, 600, info.Height)
}

func TestGetWindowInfo_Bad(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	info, err := svc.GetWindowInfo("nonexistent")
	// QueryWindowByName returns nil for nonexistent — handled=true, result=nil
	assert.NoError(t, err)
	assert.Nil(t, info)
}

func TestGetWindowInfo_BadType(t *testing.T) {
	svc, c := newTestDisplayService(t)
	c.RegisterQuery(func(_ *core.Core, q core.Query) core.Result {
		switch q.(type) {
		case window.QueryWindowByName:
			return core.Result{Value: "unexpected", OK: true}
		default:
			return core.Result{}
		}
	})

	info, err := svc.GetWindowInfo("broken")

	require.Error(t, err)
	assert.Nil(t, info)
}

func TestListWindowInfos_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	_ = svc.OpenWindow(window.WithName("win-1"))
	_ = svc.OpenWindow(window.WithName("win-2"))

	infos := svc.ListWindowInfos()
	assert.Len(t, infos, 2)
}

func TestSetWindowPosition_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("pos-win"))

	err := svc.SetWindowPosition("pos-win", 300, 400)
	assert.NoError(t, err)

	info, _ := svc.GetWindowInfo("pos-win")
	assert.Equal(t, 300, info.X)
	assert.Equal(t, 400, info.Y)
}

func TestSetWindowPosition_Bad(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	err := svc.SetWindowPosition("nonexistent", 0, 0)
	assert.Error(t, err)
}

func TestSetWindowPosition_ActionFailure(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	c.Action("window.setPosition", func(_ context.Context, _ core.Options) core.Result {
		return core.Result{OK: false}
	})

	err := svc.SetWindowPosition("pos-win", 300, 400)

	require.Error(t, err)
	assert.Contains(t, err.Error(), "window.setPosition")
}

func TestSetWindowSize_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("size-win"))

	err := svc.SetWindowSize("size-win", 1024, 768)
	assert.NoError(t, err)

	info, _ := svc.GetWindowInfo("size-win")
	assert.Equal(t, 1024, info.Width)
	assert.Equal(t, 768, info.Height)
}

func TestSetWindowBounds_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("bounds-win"))

	err := svc.SetWindowBounds("bounds-win", 10, 20, 640, 480)
	assert.NoError(t, err)

	info, _ := svc.GetWindowInfo("bounds-win")
	assert.Equal(t, 10, info.X)
	assert.Equal(t, 20, info.Y)
	assert.Equal(t, 640, info.Width)
	assert.Equal(t, 480, info.Height)
}

func TestSetWindowBounds_Bad(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	err := svc.SetWindowBounds("missing", 1, 2, 3, 4)

	assert.Error(t, err)
}

func TestSetWindowBounds_Ugly(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("bounds-win"))

	err := svc.SetWindowBounds("bounds-win", -10, -20, 0, 1)
	assert.NoError(t, err)

	info, _ := svc.GetWindowInfo("bounds-win")
	assert.Equal(t, -10, info.X)
	assert.Equal(t, -20, info.Y)
	assert.Equal(t, 0, info.Width)
	assert.Equal(t, 1, info.Height)
}

func TestMaximizeWindow_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("max-win"))

	err := svc.MaximizeWindow("max-win")
	assert.NoError(t, err)

	info, _ := svc.GetWindowInfo("max-win")
	assert.True(t, info.Maximized)
}

func TestRestoreWindow_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("restore-win"))
	_ = svc.MaximizeWindow("restore-win")

	err := svc.RestoreWindow("restore-win")
	assert.NoError(t, err)

	info, _ := svc.GetWindowInfo("restore-win")
	assert.False(t, info.Maximized)
}

func TestFocusWindow_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("focus-win"))

	err := svc.FocusWindow("focus-win")
	assert.NoError(t, err)

	info, _ := svc.GetWindowInfo("focus-win")
	assert.True(t, info.Focused)
}

func TestCloseWindow_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("close-win"))

	err := svc.CloseWindow("close-win")
	assert.NoError(t, err)

	// Window should be removed
	info, _ := svc.GetWindowInfo("close-win")
	assert.Nil(t, info)
}

func TestSetWindowVisibility_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("vis-win"))

	err := svc.SetWindowVisibility("vis-win", false)
	assert.NoError(t, err)

	err = svc.SetWindowVisibility("vis-win", true)
	assert.NoError(t, err)
}

func TestSetWindowAlwaysOnTop_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("ontop-win"))

	err := svc.SetWindowAlwaysOnTop("ontop-win", true)
	assert.NoError(t, err)
}

func TestSetWindowTitle_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("title-win"))

	err := svc.SetWindowTitle("title-win", "New Title")
	assert.NoError(t, err)
}

func TestSetWindowFullscreen_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	windowSvc := core.MustServiceFor[*window.Service](c, "window")
	_ = svc.OpenWindow(window.WithName("full-win"))

	err := svc.SetWindowFullscreen("full-win", true)

	require.NoError(t, err)
	pw, ok := windowSvc.Manager().Get("full-win")
	require.True(t, ok)
	assert.True(t, pw.IsFullscreen())
}

func TestSetWindowFullscreen_Bad(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	err := svc.SetWindowFullscreen("missing", true)

	require.Error(t, err)
}

func TestLayoutBesideEditor_ActionFailure(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	c.Action("window.layoutBesideEditor", func(_ context.Context, _ core.Options) core.Result {
		return core.Result{OK: false}
	})

	result, err := svc.LayoutBesideEditor("preview", "code", "right", 0.62)

	require.Error(t, err)
	assert.Zero(t, result)
	assert.Contains(t, err.Error(), "window.layoutBesideEditor")
}

func TestSetWindowFullscreen_Ugly(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	windowSvc := core.MustServiceFor[*window.Service](c, "window")
	_ = svc.OpenWindow(window.WithName("full-win"))

	require.NoError(t, svc.SetWindowFullscreen("full-win", true))
	err := svc.SetWindowFullscreen("full-win", false)

	require.NoError(t, err)
	pw, ok := windowSvc.Manager().Get("full-win")
	require.True(t, ok)
	assert.False(t, pw.IsFullscreen())
}

func TestGetWindowTitle_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("title-win"), window.WithTitle("Inspector"))

	title, err := svc.GetWindowTitle("title-win")

	require.NoError(t, err)
	assert.Equal(t, "Inspector", title)
}

func TestGetWindowTitle_Bad(t *testing.T) {
	svc, _ := newTestDisplayService(t)

	title, err := svc.GetWindowTitle("missing")

	require.Error(t, err)
	assert.Empty(t, title)
}

func TestGetWindowTitle_Ugly(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("title-win"), window.WithTitle("Line 1 <Line 2>\nTabbed"))

	title, err := svc.GetWindowTitle("title-win")

	require.NoError(t, err)
	assert.Equal(t, "Line 1 <Line 2>\nTabbed", title)
}

func TestMinimizeWindow_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	windowSvc := core.MustServiceFor[*window.Service](c, "window")
	_ = svc.OpenWindow(window.WithName("min-win"))

	err := svc.MinimizeWindow("min-win")

	require.NoError(t, err)
	pw, ok := windowSvc.Manager().Get("min-win")
	require.True(t, ok)
	assert.True(t, pw.IsMinimised())
}

func TestMinimizeWindow_Bad(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	err := svc.MinimizeWindow("missing")

	require.Error(t, err)
}

func TestMinimizeWindow_Ugly(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	windowSvc := core.MustServiceFor[*window.Service](c, "window")
	_ = svc.OpenWindow(window.WithName("min-win"))

	require.NoError(t, svc.MinimizeWindow("min-win"))
	err := svc.MinimizeWindow("min-win")

	require.NoError(t, err)
	pw, ok := windowSvc.Manager().Get("min-win")
	require.True(t, ok)
	assert.True(t, pw.IsMinimised())
}

func TestHandleWSMessage_SetWindowOpacity_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("opacity-win"))

	r := svc.handleWSMessage(WSMessage{
		Action: "window:set-opacity",
		Data: map[string]any{
			"name":    "opacity-win",
			"opacity": 0.35,
		},
	})
	require.True(t, r.OK)

	info, err := svc.GetWindowInfo("opacity-win")
	require.NoError(t, err)
	require.NotNil(t, info)
	assert.InDelta(t, 0.35, info.Opacity, 0.0001)
}

func TestDisplay_requireStringField_Good(t *testing.T) {
	value, err := requireStringField(map[string]any{"window": "main"}, "window")

	require.NoError(t, err)
	assert.Equal(t, "main", value)
}

func TestDisplay_requireStringField_Bad(t *testing.T) {
	value, err := requireStringField(map[string]any{"window": ""}, "window")

	require.Error(t, err)
	assert.Empty(t, value)
}

func TestDisplay_requireStringField_Ugly(t *testing.T) {
	value, err := requireStringField(map[string]any{"window": 42}, "window")

	require.Error(t, err)
	assert.Empty(t, value)
}

func TestDisplay_optionsFromMap_Good(t *testing.T) {
	opts := optionsFromMap(map[string]any{"alpha": "one", "beta": 2})

	require.Equal(t, 2, opts.Len())
	got := map[string]any{}
	for _, opt := range opts.Items() {
		got[opt.Key] = opt.Value
	}
	assert.True(t, reflect.DeepEqual(map[string]any{"alpha": "one", "beta": 2}, got))
}

func TestDisplay_optionsFromMap_Bad(t *testing.T) {
	opts := optionsFromMap(nil)

	require.NotNil(t, opts)
	assert.Equal(t, 0, opts.Len())
}

func TestDisplay_optionsFromMap_Ugly(t *testing.T) {
	opts := wsOptions(map[string]any{"nested": map[string]any{"value": "x"}})

	require.Equal(t, 1, opts.Len())
	item := opts.Items()[0]
	assert.Equal(t, "nested", item.Key)
	assert.Equal(t, map[string]any{"value": "x"}, item.Value)
}

func TestDisplay_handleWSMessage_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("opacity-win"))

	result := svc.handleWSMessage(WSMessage{
		Action: "window:set-opacity",
		Data: map[string]any{
			"name":    "opacity-win",
			"opacity": 0.55,
		},
	})
	require.True(t, result.OK)

	info, err := svc.GetWindowInfo("opacity-win")
	require.NoError(t, err)
	require.NotNil(t, info)
	assert.InDelta(t, 0.55, info.Opacity, 0.0001)
}

func TestDisplay_handleWSMessage_Bad(t *testing.T) {
	svc, _ := newTestDisplayService(t)
	result := svc.handleWSMessage(WSMessage{Action: "unknown:action"})

	require.False(t, result.OK)
	assert.Contains(t, result.Value.(error).Error(), "unknown websocket action")
}

func TestDisplay_handleWSMessage_Ugly(t *testing.T) {
	svc, _ := newTestDisplayService(t)
	result := svc.handleWSMessage(WSMessage{
		Action: "window:set-opacity",
		Data: map[string]any{
			"name": "main",
		},
	})

	require.False(t, result.OK)
	assert.Contains(t, result.Value.(error).Error(), "missing required field \"opacity\"")
}

func TestDisplay_handleWSMessage_LayoutCommands_Good(t *testing.T) {
	cases := []struct {
		name   string
		action string
		msg    WSMessage
		check  func(*testing.T, core.Options)
	}{
		{
			name:   "LayoutBesideEditor",
			action: "window.layoutBesideEditor",
			msg: WSMessage{
				Action: "layout:beside-editor",
				Data: map[string]any{
					"name":   "preview",
					"editor": "code",
					"side":   "right",
					"ratio":  0.62,
				},
			},
			check: func(t *testing.T, opts core.Options) {
				t.Helper()
				task := opts.Get("task").Value.(window.TaskLayoutBesideEditor)
				assert.Equal(t, "preview", task.Name)
				assert.Equal(t, "code", task.Editor)
				assert.Equal(t, "right", task.Side)
				assert.InDelta(t, 0.62, task.Ratio, 0.0001)
			},
		},
		{
			name:   "LayoutSuggest",
			action: "window.layoutSuggest",
			msg: WSMessage{
				Action: "layout:suggest",
				Data: map[string]any{
					"screen_id":    "screen-1",
					"window_count": 3,
				},
			},
			check: func(t *testing.T, opts core.Options) {
				t.Helper()
				task := opts.Get("task").Value.(window.TaskLayoutSuggest)
				assert.Equal(t, "screen-1", task.ScreenID)
				assert.Equal(t, 3, task.WindowCount)
			},
		},
		{
			name:   "FindScreenSpace",
			action: "window.findSpace",
			msg: WSMessage{
				Action: "screen:find-space",
				Data: map[string]any{
					"screen_id": "screen-1",
					"width":     800,
					"height":    600,
					"padding":   24,
				},
			},
			check: func(t *testing.T, opts core.Options) {
				t.Helper()
				task := opts.Get("task").Value.(window.TaskScreenFindSpace)
				assert.Equal(t, "screen-1", task.ScreenID)
				assert.Equal(t, 800, task.Width)
				assert.Equal(t, 600, task.Height)
				assert.Equal(t, 24, task.Padding)
			},
		},
		{
			name:   "ArrangeWindowPair",
			action: "window.arrangePair",
			msg: WSMessage{
				Action: "window:arrange-pair",
				Data: map[string]any{
					"primary":   "editor",
					"secondary": "preview",
					"screen_id": "screen-1",
					"ratio":     0.55,
				},
			},
			check: func(t *testing.T, opts core.Options) {
				t.Helper()
				task := opts.Get("task").Value.(window.TaskWindowArrangePair)
				assert.Equal(t, "editor", task.Primary)
				assert.Equal(t, "preview", task.Secondary)
				assert.Equal(t, "screen-1", task.ScreenID)
				assert.InDelta(t, 0.55, task.Ratio, 0.0001)
			},
		},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			svc, c := newTestDisplayAPIService(t)
			called := false
			c.Action(tc.action, func(_ context.Context, opts core.Options) core.Result {
				called = true
				tc.check(t, opts)
				return core.Result{OK: true}
			})

			result := svc.handleWSMessage(tc.msg)
			require.True(t, result.OK)
			assert.True(t, called)
		})
	}
}

func TestDisplay_handleWSMessage_LayoutCommands_Bad(t *testing.T) {
	cases := []struct {
		name   string
		action string
		msg    WSMessage
		field  string
	}{
		{
			name:   "LayoutBesideEditor",
			action: "window.layoutBesideEditor",
			msg: WSMessage{
				Action: "layout:beside-editor",
				Data: map[string]any{
					"name":   "preview",
					"editor": "code",
					"side":   "right",
				},
			},
			field: "ratio",
		},
		{
			name:   "LayoutSuggest",
			action: "window.layoutSuggest",
			msg: WSMessage{
				Action: "layout:suggest",
				Data: map[string]any{
					"screen_id": "screen-1",
				},
			},
			field: "window_count",
		},
		{
			name:   "FindScreenSpace",
			action: "window.findSpace",
			msg: WSMessage{
				Action: "screen:find-space",
				Data: map[string]any{
					"screen_id": "screen-1",
					"width":     800,
					"height":    600,
				},
			},
			field: "padding",
		},
		{
			name:   "ArrangeWindowPair",
			action: "window.arrangePair",
			msg: WSMessage{
				Action: "window:arrange-pair",
				Data: map[string]any{
					"primary":   "editor",
					"secondary": "preview",
					"screen_id": "screen-1",
				},
			},
			field: "ratio",
		},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			svc, c := newTestDisplayAPIService(t)
			called := false
			c.Action(tc.action, func(_ context.Context, _ core.Options) core.Result {
				called = true
				return core.Result{OK: true}
			})

			result := svc.handleWSMessage(tc.msg)

			require.False(t, result.OK)
			assert.False(t, called)
			assert.Contains(t, result.Value.(error).Error(), "missing required field \""+tc.field+"\"")
		})
	}
}

func TestDisplay_handleWSMessage_LayoutCommands_Ugly(t *testing.T) {
	cases := []struct {
		name   string
		action string
		msg    WSMessage
		field  string
	}{
		{
			name:   "LayoutBesideEditor",
			action: "window.layoutBesideEditor",
			msg: WSMessage{
				Action: "layout:beside-editor",
				Data: map[string]any{
					"name":   "preview",
					"editor": "code",
					"side":   "right",
					"ratio":  "0.62",
				},
			},
			field: "ratio",
		},
		{
			name:   "LayoutSuggest",
			action: "window.layoutSuggest",
			msg: WSMessage{
				Action: "layout:suggest",
				Data: map[string]any{
					"screen_id":    "screen-1",
					"window_count": 2.5,
				},
			},
			field: "window_count",
		},
		{
			name:   "FindScreenSpace",
			action: "window.findSpace",
			msg: WSMessage{
				Action: "screen:find-space",
				Data: map[string]any{
					"screen_id": "screen-1",
					"width":     "800",
					"height":    600,
					"padding":   24,
				},
			},
			field: "width",
		},
		{
			name:   "ArrangeWindowPair",
			action: "window.arrangePair",
			msg: WSMessage{
				Action: "window:arrange-pair",
				Data: map[string]any{
					"primary":   "editor",
					"secondary": "preview",
					"screen_id": "screen-1",
					"ratio":     true,
				},
			},
			field: "ratio",
		},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			svc, c := newTestDisplayAPIService(t)
			called := false
			c.Action(tc.action, func(_ context.Context, _ core.Options) core.Result {
				called = true
				return core.Result{OK: true}
			})

			result := svc.handleWSMessage(tc.msg)

			require.False(t, result.OK)
			assert.False(t, called)
			assert.Contains(t, result.Value.(error).Error(), "invalid required field \""+tc.field+"\"")
		})
	}
}

func TestDisplay_handleTrayAction_Good(t *testing.T) {
	platform := window.NewMockPlatform()
	c := core.New(
		core.WithService(Register(nil)),
		core.WithService(window.Register(platform)),
		core.WithService(systray.Register(systray.NewMockPlatform())),
		core.WithService(menu.Register(menu.NewMockPlatform())),
		core.WithServiceLock(),
	)
	require.True(t, c.ServiceStartup(context.Background(), nil).OK)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("one"))
	_ = svc.OpenWindow(window.WithName("two"))

	svc.handleTrayAction("open-desktop")
	require.Len(t, platform.Windows, 2)
	assert.True(t, platform.Windows[0].IsFocused())
	assert.True(t, platform.Windows[1].IsFocused())

	svc.handleTrayAction("close-desktop")
	assert.False(t, platform.Windows[0].IsVisible())
	assert.False(t, platform.Windows[1].IsVisible())
}

func TestGetFocusedWindow_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("win-a"))
	_ = svc.OpenWindow(window.WithName("win-b"))
	_ = svc.FocusWindow("win-b")

	focused := svc.GetFocusedWindow()
	assert.Equal(t, "win-b", focused)
}

func TestGetFocusedWindow_Good_NoneSelected(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")
	_ = svc.OpenWindow(window.WithName("win-a"))

	focused := svc.GetFocusedWindow()
	assert.Equal(t, "", focused)
}

func TestCreateWindow_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	info, err := svc.CreateWindow(CreateWindowOptions{
		Name:   "new-win",
		Title:  "New Window",
		URL:    "/new",
		Width:  600,
		Height: 400,
	})
	require.NoError(t, err)
	assert.Equal(t, "new-win", info.Name)
}

func TestCreateWindow_Bad(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	_, err := svc.CreateWindow(CreateWindowOptions{})
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "window name is required")
}

func TestResetWindowState_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	err := svc.ResetWindowState()
	assert.NoError(t, err)
}

func TestGetSavedWindowStates_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	states := svc.GetSavedWindowStates()
	assert.NotNil(t, states)
}

func TestDisplay_PublicCollections_AreNilSafe(t *testing.T) {
	svc, _ := newTestDisplayService(t)

	infos := svc.ListWindowInfos()
	layouts := svc.ListLayouts()
	states := svc.GetSavedWindowStates()

	require.NotNil(t, infos)
	require.NotNil(t, layouts)
	require.NotNil(t, states)
	assert.Empty(t, infos)
	assert.Empty(t, layouts)
	assert.Empty(t, states)
}

func TestDisplay_WindowService_NilSafe(t *testing.T) {
	svc := &Service{}

	assert.NotPanics(t, func() {
		svc.ResetWindowState()
	})

	assert.NotPanics(t, func() {
		states := svc.GetSavedWindowStates()
		require.NotNil(t, states)
		assert.Empty(t, states)
	})
}

func TestHandleIPCEvents_WindowOpened_Good(t *testing.T) {
	c := newTestConclave(t)

	// Open a window — this should trigger ActionWindowOpened
	// which HandleIPCEvents should convert to a WS event
	r := taskRun(c, "window.open", window.TaskOpenWindow{
		Window: &window.Window{Name: "test"},
	})
	require.True(t, r.OK)
	info := r.Value.(window.WindowInfo)
	assert.Equal(t, "test", info.Name)
}

func TestHandleListWorkspaces_Good(t *testing.T) {
	c := newTestConclave(t)
	svc := core.MustServiceFor[*Service](c, "display")

	// handleListWorkspaces should not panic when workspace service is not available
	assert.NotPanics(t, func() {
		svc.handleListWorkspaces()
	})
}

func TestWSEventManager_Good(t *testing.T) {
	em := NewWSEventManager()
	defer em.Close()

	assert.NotNil(t, em)
	assert.Equal(t, 0, em.ConnectedClients())
}

func TestService_OnShutdown_ClosesEventManager(t *testing.T) {
	em := NewWSEventManager()
	svc := &Service{events: em}

	server := httptest.NewServer(http.HandlerFunc(em.HandleWebSocket))
	t.Cleanup(server.Close)

	wsURL := "ws" + strings.TrimPrefix(server.URL, "http")
	conn, _, err := websocket.DefaultDialer.Dial(wsURL, nil)
	require.NoError(t, err)
	defer func() { _ = conn.Close() }()
	defer em.Close()

	require.True(t, svc.OnShutdown(context.Background()).OK)
	assert.Nil(t, svc.events)

	require.Eventually(t, func() bool {
		return em.ConnectedClients() == 0
	}, 2*time.Second, 20*time.Millisecond)

	_ = conn.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
	_, _, err = conn.ReadMessage()
	require.Error(t, err)
}

// --- Config file loading tests ---

func TestLoadConfig_Good(t *testing.T) {
	// Create temp config file
	dir := t.TempDir()
	cfgPath := core.JoinPath(dir, ".core", "gui", "config.yaml")
	require.NoError(t, os.MkdirAll(core.PathDir(cfgPath), 0o755))
	require.NoError(t, os.WriteFile(cfgPath, []byte(`
window:
  default_width: 1280
  default_height: 720
systray:
  tooltip: "Test App"
menu:
  show_dev_tools: false
`), 0o644))

	s, _ := New()
	s.loadConfigFrom(cfgPath)

	// Verify configData was populated from file
	assert.Equal(t, 1280, s.configData["window"]["default_width"])
	assert.Equal(t, "Test App", s.configData["systray"]["tooltip"])
	assert.Equal(t, false, s.configData["menu"]["show_dev_tools"])
}

func TestLoadConfig_Bad_MissingFile(t *testing.T) {
	s, _ := New()
	s.loadConfigFrom(core.JoinPath(t.TempDir(), "nonexistent.yaml"))

	// Should not panic, configData stays at empty defaults
	assert.Empty(t, s.configData["window"])
	assert.Empty(t, s.configData["systray"])
	assert.Empty(t, s.configData["menu"])
}

func TestHandleConfigTask_Persists_Good(t *testing.T) {
	dir := t.TempDir()
	cfgPath := core.JoinPath(dir, "config.yaml")

	s, _ := New()
	s.loadConfigFrom(cfgPath) // Creates empty config (file doesn't exist yet)

	// Simulate a TaskSaveConfig through the handler
	c := core.New(
		core.WithService(func(c *core.Core) core.Result {
			s.ServiceRuntime = core.NewServiceRuntime[Options](c, Options{})
			return core.Result{Value: s, OK: true}
		}),
		core.WithServiceLock(),
	)
	c.ServiceStartup(context.Background(), nil)

	r := taskRun(c, "display.saveWindowConfig", window.TaskSaveConfig{
		Config: map[string]any{"default_width": 1920},
	})
	require.True(t, r.OK)

	// Verify file was written
	data, err := os.ReadFile(cfgPath)
	require.NoError(t, err)
	assert.Contains(t, string(data), "default_width")
}

func TestDisplay_LayoutSuggest_Good(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	var gotTask window.TaskLayoutSuggest
	c.Action("window.layoutSuggest", func(_ context.Context, opts core.Options) core.Result {
		gotTask = opts.Get("task").Value.(window.TaskLayoutSuggest)
		return core.Result{
			Value: window.LayoutSuggestion{
				Mode:     "coding",
				Reason:   "two-pane split",
				ScreenID: "screen-1",
				Width:    1280,
				Height:   720,
			},
			OK: true,
		}
	})

	got, err := svc.LayoutSuggest("screen-1", 2)

	require.NoError(t, err)
	assert.Equal(t, "coding", got.Mode)
	assert.Equal(t, "two-pane split", got.Reason)
	assert.Equal(t, "screen-1", got.ScreenID)
	assert.Equal(t, 1280, got.Width)
	assert.Equal(t, 720, got.Height)
	assert.Equal(t, "screen-1", gotTask.ScreenID)
	assert.Equal(t, 2, gotTask.WindowCount)
}

func TestDisplay_LayoutSuggest_Bad(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	c.Action("window.layoutSuggest", func(_ context.Context, _ core.Options) core.Result {
		return core.Result{Value: assert.AnError, OK: false}
	})

	got, err := svc.LayoutSuggest("", 0)

	require.Error(t, err)
	assert.Equal(t, window.LayoutSuggestion{}, got)
	assert.Equal(t, assert.AnError, err)
}

func TestDisplay_LayoutSuggest_Ugly(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	c.Action("window.layoutSuggest", func(_ context.Context, _ core.Options) core.Result {
		return core.Result{Value: "unexpected", OK: true}
	})

	got, err := svc.LayoutSuggest("screen-1", 1)

	require.Error(t, err)
	assert.Equal(t, window.LayoutSuggestion{}, got)
	assert.Contains(t, err.Error(), "unexpected result type")
}

func TestDisplay_GetLayout_Good(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	c.RegisterQuery(func(_ *core.Core, q core.Query) core.Result {
		switch typed := q.(type) {
		case window.QueryLayoutGet:
			assert.Equal(t, "development", typed.Name)
			return core.Result{
				Value: &window.Layout{
					Name: "development",
					Windows: map[string]window.WindowState{
						"editor":   {},
						"terminal": {},
					},
					CreatedAt: 1,
					UpdatedAt: 2,
				},
				OK: true,
			}
		default:
			return core.Result{}
		}
	})

	got := svc.GetLayout("development")

	require.NotNil(t, got)
	assert.Equal(t, "development", got.Name)
	assert.Len(t, got.Windows, 2)
	assert.Equal(t, int64(1), got.CreatedAt)
	assert.Equal(t, int64(2), got.UpdatedAt)
}

func TestDisplay_GetLayout_Bad(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	c.RegisterQuery(func(_ *core.Core, q core.Query) core.Result {
		switch q.(type) {
		case window.QueryLayoutGet:
			return core.Result{Value: nil, OK: true}
		default:
			return core.Result{}
		}
	})

	got := svc.GetLayout("missing")

	assert.Nil(t, got)
}

func TestDisplay_GetLayout_Ugly(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	c.RegisterQuery(func(_ *core.Core, q core.Query) core.Result {
		switch q.(type) {
		case window.QueryLayoutGet:
			return core.Result{Value: "unexpected", OK: true}
		default:
			return core.Result{}
		}
	})

	got := svc.GetLayout("broken")

	assert.Nil(t, got)
}

func TestDisplay_SaveLayout_Good(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	var gotTask window.TaskSaveLayout
	c.Action("window.saveLayout", func(_ context.Context, opts core.Options) core.Result {
		gotTask = opts.Get("task").Value.(window.TaskSaveLayout)
		return core.Result{OK: true}
	})

	err := svc.SaveLayout("development")

	require.NoError(t, err)
	assert.Equal(t, "development", gotTask.Name)
}

func TestDisplay_SaveLayout_Bad(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	c.Action("window.saveLayout", func(_ context.Context, _ core.Options) core.Result {
		return core.Result{Value: assert.AnError, OK: false}
	})

	err := svc.SaveLayout("development")

	require.Error(t, err)
	assert.Equal(t, assert.AnError, err)
}

func TestDisplay_SaveLayout_Ugly(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	c.Action("window.saveLayout", func(_ context.Context, _ core.Options) core.Result {
		return core.Result{Value: "unexpected", OK: false}
	})

	err := svc.SaveLayout("")

	require.Error(t, err)
	assert.Contains(t, err.Error(), "window.saveLayout")
}

func TestDisplay_RestoreLayout_Good(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	var gotTask window.TaskRestoreLayout
	c.Action("window.restoreLayout", func(_ context.Context, opts core.Options) core.Result {
		gotTask = opts.Get("task").Value.(window.TaskRestoreLayout)
		return core.Result{OK: true}
	})

	err := svc.RestoreLayout("development")

	require.NoError(t, err)
	assert.Equal(t, "development", gotTask.Name)
}

func TestDisplay_RestoreLayout_Bad(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	c.Action("window.restoreLayout", func(_ context.Context, _ core.Options) core.Result {
		return core.Result{Value: assert.AnError, OK: false}
	})

	err := svc.RestoreLayout("development")

	require.Error(t, err)
	assert.Equal(t, assert.AnError, err)
}

func TestDisplay_RestoreLayout_Ugly(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	c.Action("window.restoreLayout", func(_ context.Context, _ core.Options) core.Result {
		return core.Result{Value: "unexpected", OK: false}
	})

	err := svc.RestoreLayout("")

	require.Error(t, err)
	assert.Contains(t, err.Error(), "window.restoreLayout")
}

func TestDisplay_SetWindowBackgroundColour_Good(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	var gotTask window.TaskSetBackgroundColour
	c.Action("window.setBackgroundColour", func(_ context.Context, opts core.Options) core.Result {
		gotTask = opts.Get("task").Value.(window.TaskSetBackgroundColour)
		return core.Result{OK: true}
	})

	err := svc.SetWindowBackgroundColour("main", 1, 2, 3, 4)

	require.NoError(t, err)
	assert.Equal(t, "main", gotTask.Name)
	assert.Equal(t, uint8(1), gotTask.Red)
	assert.Equal(t, uint8(2), gotTask.Green)
	assert.Equal(t, uint8(3), gotTask.Blue)
	assert.Equal(t, uint8(4), gotTask.Alpha)
}

func TestDisplay_SetWindowBackgroundColour_Bad(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	c.Action("window.setBackgroundColour", func(_ context.Context, _ core.Options) core.Result {
		return core.Result{Value: assert.AnError, OK: false}
	})

	err := svc.SetWindowBackgroundColour("main", 1, 2, 3, 4)

	require.Error(t, err)
	assert.Equal(t, assert.AnError, err)
}

func TestDisplay_SetWindowBackgroundColour_Ugly(t *testing.T) {
	svc, c := newTestDisplayAPIService(t)

	c.Action("window.setBackgroundColour", func(_ context.Context, _ core.Options) core.Result {
		return core.Result{Value: "unexpected", OK: false}
	})

	err := svc.SetWindowBackgroundColour("", 0, 0, 0, 0)

	require.Error(t, err)
	assert.Contains(t, err.Error(), "window.setBackgroundColour")
}