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

package app

import (
	"context"
	"log/slog"
	"os"
	"os/exec"
	"strings"
	"testing"
	"time"

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

func TestNativeBrowserNamedLinks(t *testing.T) {
	if os.Getenv("CTHULHU_NATIVE_BROWSER") != "1" {
		t.Skip("requires private browser session")
	}
	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
	defer cancel()
	adapter := atspi.New()
	if err := adapter.Start(ctx); err != nil {
		t.Fatal(err)
	}
	defer adapter.Stop(context.Background())
	if output, err := exec.CommandContext(ctx, "xdotool", "key", "--clearmodifiers", "Tab", "shift+Tab").CombinedOutput(); err != nil {
		t.Fatalf("fixture focus: %s, %v", output, err)
	}
	var focus atspi.ObjectID
	for !focus.Valid() {
		select {
		case event := <-adapter.Events():
			if event.Type == atspi.FocusedStateEvent && event.Detail1 == 1 && event.Source.Name == "Probe start" {
				focus = event.Source.ID()
			}
		case <-ctx.Done():
			t.Fatal(ctx.Err())
		}
	}
	tree, err := adapter.CaptureDocument(ctx, focus)
	if err != nil {
		t.Fatal(err)
	}
	cursor, err := review.NewDocumentCursor(tree)
	if err != nil {
		t.Fatal(err)
	}
	if _, err := cursor.SyncFocus(ctx, focus); err != nil {
		t.Fatal(err)
	}
	queue := &fakeSpeechQueue{spoken: make(chan string, 8)}
	for _, step := range []struct {
		command review.DocumentCaretCommand
		text    string
	}{
		{review.CaretNextLine, "Example Game 2 copies"},
		{review.CaretNextLine, "Ordinary multiline link"},
		{review.CaretNextCharacter, "r"},
		{review.CaretNextWord, "Ordinary"},
		{review.CaretNextWord, "multiline"},
		{review.CaretNextLine, "Useful image label"},
		{review.CaretPreviousLine, "Ordinary multiline link"},
		{review.CaretPreviousLine, "Example Game 2 copies"},
	} {
		move, err := cursor.MoveCaret(ctx, adapter, step.command)
		t.Logf("%v: path=%s role=%s text=%q offset=%d range=%d:%d count=%d", step.command, move.Position.Object.ID().Path, move.Position.Snapshot.Role, move.Text, move.Position.Offset, move.Start, move.End, move.Position.Snapshot.CharacterCount)
		if err != nil || !move.Moved {
			t.Fatalf("%v: %+v, %v", step.command, move, err)
		}
		if step.text == "Example Game 2 copies" && !move.Position.Snapshot.ExplicitName {
			t.Fatal("native explicit-name attribute was not captured")
		}
		context, err := tree.DocumentContext(move.Position.Object)
		if err != nil {
			t.Fatal(err)
		}
		result := review.Result{DocumentCaretCommand: step.command, DocumentPosition: move.Position,
			DocumentCaretText: move.Text, DocumentCaretContext: context.Ancestors, Moved: move.Moved}
		presentDocumentCaretResult(slog.New(slog.DiscardHandler), queue, result, presentation.DefaultOptions())
		select {
		case spoken := <-queue.spoken:
			if !strings.Contains(spoken, step.text) {
				t.Fatalf("%v spoke %q, want %q", step.command, spoken, step.text)
			}
		default:
			t.Fatal("native browse result was silent")
		}
	}
	reference, err := tree.Reference(focus)
	if err != nil {
		t.Fatal(err)
	}
	document, err := tree.Document(ctx, reference)
	if err != nil {
		t.Fatal(err)
	}
	var username, emoji atspi.ObjectReference
	for _, node := range document.Nodes {
		if node.Snapshot.Role != "static" {
			continue
		}
		switch strings.TrimSpace(node.Snapshot.Name) {
		case "Username":
			username = node.Reference
		case "🧻":
			emoji = node.Reference
		}
	}
	if !username.Valid() || !emoji.Valid() {
		t.Fatal("separate display-name and emoji text objects missing")
	}
	word, err := adapter.ReadDocumentCaret(ctx, emoji, 0, atspi.DocumentCaretWord)
	t.Logf("native emoji word: %+v, %v", word, err)
	if _, err := cursor.SyncFocus(ctx, username.ID()); err != nil {
		t.Fatal(err)
	}
	for _, step := range []struct {
		command review.DocumentCaretCommand
		text    string
	}{
		{review.CaretNextWord, "Username"},
		{review.CaretNextWord, "🧻"},
		{review.CaretNextWord, "After"},
		{review.CaretPreviousWord, "After"},
		{review.CaretPreviousWord, "🧻"},
		{review.CaretPreviousWord, "Username"},
	} {
		move, err := cursor.MoveCaret(ctx, adapter, step.command)
		if err != nil || !move.Moved || strings.TrimSpace(move.Text) != step.text {
			t.Fatalf("word navigation across emoji, %v: %+v, %v; want %q", step.command, move, err, step.text)
		}
	}
}