// Cthulhu screen reader.
// Copyright (c) 2026 Storm Dragon
// Authors: Storm Dragon, Angus Kola
//
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along with
// this program. If not, see <https://www.gnu.org/licenses/gpl-3.0.html>.

package app

import (
	"context"
	"log/slog"
	"testing"
	"time"

	"git.stormux.org/storm/cthulhu/internal/atspi"
	"git.stormux.org/storm/cthulhu/internal/input"
	"git.stormux.org/storm/cthulhu/internal/presentation"
	"git.stormux.org/storm/cthulhu/internal/review"
)

func TestProcessEventsWhereAmIRepeatsCurrentFocus(t *testing.T) {
	speech := &fakeSpeechQueue{
		spoken:    make(chan string, 2),
		interrupt: make(chan struct{}, 1),
	}
	adapter := &fakeAdapter{events: make(chan atspi.Event, 1)}
	reviewRequests := make(chan input.Command, 1)
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	completed := make(chan error, 1)
	options := presentation.DefaultOptions()
	options.EnableSound = true
	options.PlaySoundForRole = true
	options.RoleSoundPresentation = "sound_only"
	go func() {
		completed <- processEventsWithReview(
			ctx,
			slog.New(slog.DiscardHandler),
			speech,
			adapter,
			reviewRequests,
			0,
			options,
		)
	}()

	adapter.events <- atspi.NewEvent(atspi.FocusEvent, atspi.NewSnapshot(
		"/accessible/example", "Example", "button", "Runs the example", "",
	))
	select {
	case text := <-speech.spoken:
		if text != "Example, Runs the example" {
			t.Fatalf("focus speech = %q", text)
		}
	case <-time.After(time.Second):
		t.Fatal("focus was not presented")
	}
	reviewRequests <- input.WhereAmI
	select {
	case <-speech.interrupt:
	case <-time.After(time.Second):
		t.Fatal("where am I did not interrupt stale speech")
	}
	select {
	case text := <-speech.spoken:
		if text != "Example, button, Runs the example" {
			t.Fatalf("where am I speech = %q", text)
		}
	case <-time.After(time.Second):
		t.Fatal("where am I was not presented")
	}
	cancel()
	select {
	case err := <-completed:
		if err != nil {
			t.Fatal(err)
		}
	case <-time.After(time.Second):
		t.Fatal("event loop did not stop")
	}
}

func TestProcessEventsWhereAmIWithoutFocus(t *testing.T) {
	speech := &fakeSpeechQueue{spoken: make(chan string, 1)}
	adapter := &fakeAdapter{events: make(chan atspi.Event)}
	reviewRequests := make(chan input.Command, 1)
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	completed := make(chan error, 1)
	go func() {
		completed <- processEventsWithReview(
			ctx,
			slog.New(slog.DiscardHandler),
			speech,
			adapter,
			reviewRequests,
			0,
		)
	}()
	reviewRequests <- input.WhereAmI
	select {
	case text := <-speech.spoken:
		if text != "Could not find current location." {
			t.Fatalf("where am I without focus = %q", text)
		}
	case <-time.After(time.Second):
		t.Fatal("missing-focus message was not presented")
	}
	cancel()
	select {
	case <-completed:
	case <-time.After(time.Second):
		t.Fatal("event loop did not stop")
	}
}

func TestProcessEventsSynchronizesAndPresentsObjectReview(t *testing.T) {
	rootID := atspi.NewObjectID(":1.42", "/root")
	firstID := atspi.NewObjectID(":1.42", "/first")
	secondID := atspi.NewObjectID(":1.42", "/second")
	root := atspi.NewSnapshot("/root", "Window", "frame", "", "")
	root.BusName = ":1.42"
	first := atspi.NewSnapshot("/first", "First", "push button", "", "")
	first.BusName = ":1.42"
	second := atspi.NewSnapshot("/second", "Second", "check box", "", "")
	second.BusName = ":1.42"
	second.Checked = true
	tree, err := atspi.NewAccessibleTree(rootID, []atspi.TreeNode{
		{Snapshot: root, Children: []atspi.ObjectID{firstID, secondID}},
		{Snapshot: first},
		{Snapshot: second},
	})
	if err != nil {
		t.Fatal(err)
	}
	adapter := &fakeAdapter{events: make(chan atspi.Event, 1), tree: tree}
	objectReview, err := review.NewWorker(adapter, time.Second)
	if err != nil {
		t.Fatal(err)
	}
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	if err := objectReview.Start(ctx); err != nil {
		t.Fatal(err)
	}
	speech := &fakeSpeechQueue{spoken: make(chan string, 3), interrupt: make(chan struct{}, 2)}
	completed := make(chan error, 1)
	go func() {
		completed <- processEventsWithObjectReview(
			ctx,
			slog.New(slog.DiscardHandler),
			speech,
			adapter,
			nil,
			objectReview,
			0,
		)
	}()

	adapter.events <- atspi.NewEvent(atspi.FocusEvent, first)
	select {
	case text := <-speech.spoken:
		if text != "First, push button" {
			t.Fatalf("focus speech = %q", text)
		}
	case <-time.After(time.Second):
		t.Fatal("focus was not presented")
	}
	if err := objectReview.Move(review.NextSibling); err != nil {
		t.Fatal(err)
	}
	select {
	case text := <-speech.spoken:
		if text != "Second, check box, checked" {
			t.Fatalf("object review speech = %q", text)
		}
	case <-time.After(time.Second):
		t.Fatal("object review movement was not presented")
	}
	if err := objectReview.Move(review.FirstChild); err != nil {
		t.Fatal(err)
	}
	select {
	case text := <-speech.spoken:
		if text != "No children." {
			t.Fatalf("object review boundary = %q", text)
		}
	case <-time.After(time.Second):
		t.Fatal("object review boundary was not presented")
	}

	cancel()
	select {
	case err := <-completed:
		if err != nil {
			t.Fatal(err)
		}
	case <-time.After(time.Second):
		t.Fatal("event loop did not stop")
	}
	if err := objectReview.Stop(context.Background()); err != nil {
		t.Fatal(err)
	}
}

func TestObjectReviewBoundaryMessagesMatchPython(t *testing.T) {
	tests := map[review.Direction]string{
		review.Parent:          "No parent.",
		review.FirstChild:      "No children.",
		review.PreviousSibling: "No previous.",
		review.NextSibling:     "No next.",
	}
	for direction, expected := range tests {
		if got := objectReviewBoundaryMessage(direction); got != expected {
			t.Fatalf("direction %d = %q, want %q", direction, got, expected)
		}
	}
}