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

package app

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

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

func TestNativeBrowserTables(t *testing.T) {
	if os.Getenv("CTHULHU_NATIVE_BROWSER") != "1" {
		t.Skip("requires private browser session")
	}
	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()
	adapter := atspi.New()
	if err := adapter.Start(ctx); err != nil {
		t.Fatal(err)
	}
	defer adapter.Stop(context.Background())
	keys := func(chord string) {
		t.Helper()
		if out, err := exec.CommandContext(ctx, "xdotool", "key", "--clearmodifiers", chord).CombinedOutput(); err != nil {
			t.Fatalf("keys %v %s", err, out)
		}
	}
	var focus atspi.Snapshot
	for attempt := 0; attempt < 25 && focus.Name != "Browser foundation"; attempt++ {
		keys("Tab")
		timer := time.NewTimer(200 * time.Millisecond)
	drain:
		for {
			select {
			case event := <-adapter.Events():
				if isFocusEvent(event.Type) {
					focus = event.Source
				}
				if focus.Name == "Browser foundation" {
					break drain
				}
			case <-timer.C:
				break drain
			case <-ctx.Done():
				t.Fatal(ctx.Err())
			}
		}
		timer.Stop()
	}
	if focus.Name != "Browser foundation" {
		t.Fatal("fixture focus missing")
	}
	worker, err := review.NewWorker(adapter, 2*time.Second)
	if err != nil {
		t.Fatal(err)
	}
	if err = worker.Start(ctx); err != nil {
		t.Fatal(err)
	}
	defer worker.Stop(context.Background())
	worker.SyncFocus(focus.ID())
	commands := xorg.NewCommands([]string{"Insert", "KP_Insert"}, input.DesktopKeyboardLayout)
	if err = commands.Start(ctx); err != nil {
		t.Fatal(err)
	}
	defer commands.Stop(context.Background())
	applied := func(enabled bool) {
		t.Helper()
		commands.SetBrowseNavigation(enabled)
		deadline := time.Now().Add(time.Second)
		for commands.BrowseNavigationEnabled() != enabled && time.Now().Before(deadline) {
			time.Sleep(10 * time.Millisecond)
		}
		if commands.BrowseNavigationEnabled() != enabled {
			t.Fatal("browse grabs did not change")
		}
	}
	applied(true)
	command := func(chord string) input.Command {
		t.Helper()
		keys(chord)
		select {
		case got := <-commands.Commands():
			return got.Command
		case err := <-commands.Failures():
			t.Fatal(err)
		case <-time.After(2 * time.Second):
			t.Fatalf("no command for %s", chord)
		}
		return ""
	}
	// Mode changes replace native browse grabs between successive A presses.
	if got := command("Insert+a"); got != input.ToggleDocumentMode {
		t.Fatal(got)
	}
	applied(false)
	if got := command("Insert+a"); got != input.StickyFocusMode {
		t.Fatal(got)
	}
	if got := command("Insert+a"); got != input.StickyBrowseMode {
		t.Fatal(got)
	}
	applied(true)
	result := func() review.Result {
		t.Helper()
		select {
		case got := <-worker.Results():
			if got.Err != nil || got.CaretErr != nil {
				t.Fatalf("navigation errors %v %v", got.Err, got.CaretErr)
			}
			return got
		case <-ctx.Done():
			t.Fatal(ctx.Err())
		}
		return review.Result{}
	}
	if got := command("t"); got != input.DocumentNextTable {
		t.Fatal(got)
	}
	if err = worker.MoveDocument(review.DocumentTable, 0, false); err != nil {
		t.Fatal(err)
	}
	if got := result(); got.DocumentPosition.Snapshot.Name != "Navigation probe" {
		t.Fatalf("table %+v", got)
	}
	for _, step := range []struct {
		key, text string
		moved     bool
	}{
		{"alt+shift+Home", "Item", true},
		{"alt+shift+Right", "Count", true},
		{"alt+shift+Down", "Five", true},
		{"alt+shift+Down", "Spans 2 columns.", true},
		{"alt+shift+Down", "blank Row 4, column 2.", true},
		{"alt+shift+Down", "Bottom of column.", false},
		{"alt+shift+Up", "Merged total", true},
		{"alt+shift+Up", "Five", true},
		{"alt+shift+End", "blank", true},
		{"alt+shift+Left", "Last item", true},
	} {
		cmd := command(step.key)
		if err = worker.MoveDocumentCaret(documentCaretCommand(cmd)); err != nil {
			t.Fatal(err)
		}
		got := result()
		if got.Moved != step.moved || !strings.Contains(got.DocumentCaretText, step.text) {
			t.Fatalf("%s got %+v want %s", step.key, got, step.text)
		}
		if step.text == "Five" && !strings.Contains(got.DocumentCaretText, "Apples") {
			t.Fatalf("row header missing: %q", got.DocumentCaretText)
		}
		if step.text == "Five" && (got.DocumentTableRowHeader != "Apples" || got.DocumentTableColumnHeader != "Count") {
			t.Fatalf("table header metadata missing for verbosity: %+v", got)
		}
	}
}