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

package app

import (
	"context"
	"errors"
	"reflect"
	"strings"
	"testing"

	"git.stormux.org/storm/fenrir/internal/config"
	"git.stormux.org/storm/fenrir/internal/screen"
)

func TestSavedModifiersWaitForMenuCloseAndIdleKeys(t *testing.T) {
	base := config.Defaults()
	base.Keyboard.FenrirKeys = []string{"KEY_INSERT"}
	source := &fakeSource{snapshot: screen.Snapshot{Terminal: 1, Active: true}}
	voice := &fakeVoice{}
	calls := 0
	idle := false
	keys := &fakeKeys{updateModifiers: func(reader, script []string) (bool, error) {
		calls++
		if !reflect.DeepEqual(reader, []string{"KEY_CAPSLOCK"}) || !reflect.DeepEqual(script, []string{"KEY_META"}) {
			t.Fatal(reader, script)
		}
		return idle, nil
	}}
	a, err := new_application(context.Background(), source, keys, voice, RunOptions{Settings: base})
	if err != nil {
		t.Fatal(err)
	}
	saved := base
	saved.Keyboard.FenrirKeys = []string{"KEY_CAPSLOCK"}
	saved.General.ScriptKeys = []string{"KEY_META"}
	a.ui.active = true
	a.apply_saved_settings(saved, false)
	a.apply_pending_modifiers()
	if calls != 0 || a.settings.pendingModifiers == nil {
		t.Fatal("changed during modal capture")
	}
	a.ui.active = false
	a.apply_pending_modifiers()
	if calls != 1 || !reflect.DeepEqual(a.settings.live.Keyboard.FenrirKeys, base.Keyboard.FenrirKeys) || !reflect.DeepEqual(a.settings.live.General.ScriptKeys, base.General.ScriptKeys) {
		t.Fatal("changed while held", a.settings.live)
	}
	idle = true
	a.apply_pending_modifiers()
	if calls != 2 || a.settings.pendingModifiers != nil || !reflect.DeepEqual(a.settings.live.Keyboard.FenrirKeys, saved.Keyboard.FenrirKeys) || !reflect.DeepEqual(a.settings.live.General.ScriptKeys, saved.General.ScriptKeys) {
		t.Fatal("new keys not applied", a.settings.live)
	}
	a.apply_pending_modifiers()
	if calls != 2 {
		t.Fatal("update repeated after success")
	}
}

func TestModifierApplyFailureKeepsPreviousRuntimeAndAllowsRetry(t *testing.T) {
	base := config.Defaults()
	base.Keyboard.FenrirKeys = []string{"KEY_INSERT"}
	source := &fakeSource{snapshot: screen.Snapshot{Terminal: 1, Active: true}}
	voice := &fakeVoice{}
	keys := &fakeKeys{updateModifiers: func([]string, []string) (bool, error) { return false, errors.New("fixture grab conflict") }}
	a, err := new_application(context.Background(), source, keys, voice, RunOptions{Settings: base})
	if err != nil {
		t.Fatal(err)
	}
	saved := base
	saved.Keyboard.FenrirKeys = []string{"KEY_META"}
	a.apply_saved_settings(saved, false)
	a.apply_pending_modifiers()
	if a.settings.pendingModifiers != nil || !reflect.DeepEqual(a.settings.live.Keyboard.FenrirKeys, base.Keyboard.FenrirKeys) || !reflect.DeepEqual(a.settings.saveDraft.Keyboard.FenrirKeys, saved.Keyboard.FenrirKeys) {
		t.Fatal(a.settings)
	}
	if len(voice.messages) != 1 || !strings.Contains(voice.messages[0], "Previous keys remain active") {
		t.Fatal(voice.messages)
	}
	keys.updateModifiers = func([]string, []string) (bool, error) { return true, nil }
	a.apply_saved_settings(saved, false)
	a.apply_pending_modifiers()
	if !reflect.DeepEqual(a.settings.live.Keyboard.FenrirKeys, saved.Keyboard.FenrirKeys) {
		t.Fatal("retry failed")
	}
}