// Copyright (c) 2026 Storm Dragon
// Authors: Storm Dragon, Angus Kola
// SPDX-License-Identifier: GPL-3.0-or-later

package app

import (
	"testing"

	"git.stormux.org/storm/cthulhu/internal/atspi"
)

func ownerEvent(eventType, bus, window, focus string) atspi.Event {
	event := atspi.NewEvent(eventType, atspi.Snapshot{BusName: bus, Path: focus})
	event.Window = atspi.NewObjectID(bus, window)
	return event
}

func TestWindowOwnerKeepsWindowAndFocusIndependent(t *testing.T) {
	var owner windowOwner
	activation := ownerEvent(atspi.WindowActivatedEvent, ":1.40", "/window", "/button")
	if owner.activate(activation) {
		t.Fatal("first activation was treated as duplicate")
	}
	if owner.window != activation.Window || owner.focus != activation.Source.ID() || owner.applicationBus != ":1.40" {
		t.Fatalf("owner = %#v", owner)
	}

	focus := ownerEvent(atspi.FocusedStateEvent, ":1.40", "/window", "/entry")
	if !owner.follow(focus) || owner.window != activation.Window || owner.focus != focus.Source.ID() {
		t.Fatalf("focus did not remain in active window: %#v", owner)
	}
	if !owner.activate(activation) || owner.focus != focus.Source.ID() {
		t.Fatal("duplicate activation replaced descendant focus")
	}
}

func TestFocusBeforeActivationStillAdmitsFirstWindowActivation(t *testing.T) {
	var owner windowOwner
	focus := ownerEvent(atspi.FocusedStateEvent, ":1.40", "/window", "/entry")
	focus.Source.Focused = true
	if !owner.follow(focus) || owner.activated {
		t.Fatalf("focus-first ownership = %#v", owner)
	}
	activation := ownerEvent(atspi.WindowActivatedEvent, ":1.40", "/window", "/window")
	if owner.activate(activation) || owner.focus != focus.Source.ID() {
		t.Fatalf("first activation lost focus or was skipped: %#v", owner)
	}
	if !owner.activate(activation) {
		t.Fatal("repeated activation was not suppressed")
	}
}

func TestWindowOwnerRejectsBackgroundFocusAndUnrelatedLifecycle(t *testing.T) {
	var owner windowOwner
	owner.activate(ownerEvent(atspi.WindowActivatedEvent, ":1.40", "/window", "/button"))
	if owner.follow(ownerEvent(atspi.FocusedStateEvent, ":1.41", "/other", "/entry")) {
		t.Fatal("background focus changed ownership")
	}
	if owner.end(ownerEvent(atspi.WindowDestroyedEvent, ":1.41", "/other", "/other"), false) {
		t.Fatal("unrelated destruction cleared ownership")
	}
	if !owner.window.Valid() {
		t.Fatal("unrelated lifecycle cleared active window")
	}
}

func TestWindowOwnerHandlesTransientDeactivationAndDestruction(t *testing.T) {
	var owner windowOwner
	activation := ownerEvent(atspi.WindowActivatedEvent, ":1.40", "/window", "/button")
	owner.activate(activation)
	deactivation := ownerEvent(atspi.WindowDeactivatedEvent, ":1.40", "/window", "/window")
	deactivation.Source.StatesKnown = true
	deactivation.Source.Active = true
	if owner.end(deactivation, false) || !owner.window.Valid() {
		t.Fatal("active key-grab deactivation cleared ownership")
	}
	deactivation.Source.StatesKnown = false
	deactivation.Source.Active = false
	if owner.end(deactivation, true) || !owner.window.Valid() {
		t.Fatal("consumed-command deactivation cleared ownership")
	}
	destruction := ownerEvent(atspi.WindowDestroyedEvent, ":1.40", "/window", "/window")
	if !owner.end(destruction, true) || owner.window.Valid() || owner.focus.Valid() || owner.applicationBus != "" {
		t.Fatalf("destruction did not clear ownership: %#v", owner)
	}
}

func TestWindowOwnerClearsDefunctFocusWithoutDroppingWindow(t *testing.T) {
	var owner windowOwner
	activation := ownerEvent(atspi.WindowActivatedEvent, ":1.40", "/window", "/button")
	owner.activate(activation)
	defunct := atspi.NewEvent(atspi.DefunctStateEvent, activation.Source)
	defunct.Detail1 = 1
	windowEnded, focusEnded := owner.defunct(defunct)
	if windowEnded || !focusEnded || !owner.window.Valid() || owner.focus.Valid() {
		t.Fatalf("defunct focus result = windowEnded:%v focusEnded:%v owner:%#v", windowEnded, focusEnded, owner)
	}

	windowDefunct := atspi.NewEvent(atspi.DefunctStateEvent, atspi.Snapshot{BusName: ":1.40", Path: "/window"})
	windowDefunct.Detail1 = 1
	windowEnded, focusEnded = owner.defunct(windowDefunct)
	if !windowEnded || !focusEnded || owner.window.Valid() || owner.applicationBus != "" {
		t.Fatalf("defunct window result = windowEnded:%v focusEnded:%v owner:%#v", windowEnded, focusEnded, owner)
	}
}