package window

type mockPlatform struct {
	windows []*mockWindow
}

func newMockPlatform() *mockPlatform {
	return &mockPlatform{}
}

func (m *mockPlatform) CreateWindow(options PlatformWindowOptions) PlatformWindow {
	w := &mockWindow{
		name: options.Name, title: options.Title, url: options.URL,
		width: options.Width, height: options.Height,
		x: options.X, y: options.Y,
		visible: !options.Hidden,
	}
	m.windows = append(m.windows, w)
	return w
}

func (m *mockPlatform) GetWindows() []PlatformWindow {
	out := make([]PlatformWindow, len(m.windows))
	for i, w := range m.windows {
		out[i] = w
	}
	return out
}

type mockWindow struct {
	name, title, url     string
	width, height, x, y  int
	maximised, minimised bool
	focused              bool
	visible, alwaysOnTop bool
	backgroundColour     [4]uint8
	closed               bool
	fullscreened         bool
	eventHandlers        []func(WindowEvent)
	fileDropHandlers     []func(paths []string, targetID string)
}

func (w *mockWindow) Name() string          { return w.name }
func (w *mockWindow) Title() string         { return w.title }
func (w *mockWindow) Position() (int, int)  { return w.x, w.y }
func (w *mockWindow) Size() (int, int)      { return w.width, w.height }
func (w *mockWindow) IsMaximised() bool     { return w.maximised }
func (w *mockWindow) IsMinimised() bool     { return w.minimised }
func (w *mockWindow) IsVisible() bool       { return w.visible }
func (w *mockWindow) IsFocused() bool       { return w.focused }
func (w *mockWindow) SetTitle(title string) { w.title = title }
func (w *mockWindow) SetBounds(x, y, width, height int) {
	w.x, w.y, w.width, w.height = x, y, width, height
}
func (w *mockWindow) SetPosition(x, y int)                 { w.x = x; w.y = y }
func (w *mockWindow) SetSize(width, height int)            { w.width = width; w.height = height }
func (w *mockWindow) SetBackgroundColour(r, g, b, a uint8) { w.backgroundColour = [4]uint8{r, g, b, a} }
func (w *mockWindow) SetVisibility(visible bool)           { w.visible = visible }
func (w *mockWindow) SetAlwaysOnTop(alwaysOnTop bool)      { w.alwaysOnTop = alwaysOnTop }
func (w *mockWindow) Maximise()                            { w.maximised = true; w.minimised = false }
func (w *mockWindow) Restore()                             { w.maximised = false; w.minimised = false }
func (w *mockWindow) Minimise()                            { w.maximised = false; w.minimised = true }
func (w *mockWindow) Focus()                               { w.focused = true }
func (w *mockWindow) Close() {
	w.closed = true
	w.emit(WindowEvent{Type: "close", Name: w.name})
}
func (w *mockWindow) Show()         { w.visible = true }
func (w *mockWindow) Hide()         { w.visible = false }
func (w *mockWindow) Fullscreen()   { w.fullscreened = true }
func (w *mockWindow) UnFullscreen() { w.fullscreened = false }
func (w *mockWindow) OnWindowEvent(handler func(WindowEvent)) {
	w.eventHandlers = append(w.eventHandlers, handler)
}
func (w *mockWindow) OnFileDrop(handler func(paths []string, targetID string)) {
	w.fileDropHandlers = append(w.fileDropHandlers, handler)
}

// emit fires a test event to all registered handlers.
func (w *mockWindow) emit(e WindowEvent) {
	for _, h := range w.eventHandlers {
		h(e)
	}
}

// emitFileDrop simulates a file drop on the window.
func (w *mockWindow) emitFileDrop(paths []string, targetID string) {
	for _, h := range w.fileDropHandlers {
		h(paths, targetID)
	}
}