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

package app

import (
	"context"
	"path/filepath"
	"slices"
	"strings"
	"testing"
	"time"

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

func TestMenuRemoteAndQuickSavePreserveNextLaunchChoices(t *testing.T) {
	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
	defer cancel()
	path := filepath.Join(t.TempDir(), "settings.toml")
	base := config.Defaults()
	source := &fakeSource{snapshot: screen.Snapshot{Terminal: 1, Active: true, Rows: 1, Cols: 5, Cells: []rune("alpha")}}
	voice := &fakeVoice{}
	keys := &fakeKeys{poll: func(bool, func(input.Decision)) error { return nil }}
	a, err := new_application(ctx, source, keys, voice, RunOptions{Settings: base, ConfigPath: path})
	if err != nil {
		t.Fatal(err)
	}
	defer a.ui.close()

	// Exercise the successful menu-save callback with both live and next-launch
	// choices, then interleave session commands, remote changes and a quick save.
	menuSaved := base
	menuSaved.Keyboard.Layout = "laptop"
	menuSaved.Presentation.Speech.Module = "next-module"
	menuSaved.Presentation.Speech.Rate = 60
	menuSaved.Review.LineBreak = false
	menuSaved.Presentation.Sound.Driver = "alsa"
	menuSaved.Presentation.Sound.Theme = "fixture-pack"
	menuSaved.Presentation.Sound.Device = "null"
	if err := config.Save(path, menuSaved); err != nil {
		t.Fatal(err)
	}
	a.apply_saved_settings(menuSaved, false)
	if a.settings.live.Keyboard.Layout != base.Keyboard.Layout || a.settings.live.Presentation.Speech.Module != base.Presentation.Speech.Module || a.settings.live.Review != base.Review || a.settings.live.Presentation.Sound != base.Presentation.Sound {
		t.Fatal("next-launch choices changed the running configuration")
	}
	if len(voice.parameters) == 0 || voice.parameters[len(voice.parameters)-1].Rate != 60 {
		t.Fatal("menu speech adjustment did not apply live", voice.parameters)
	}
	for _, id := range []command.ID{command.Mute, command.AutoRead, command.ToggleAttributes} {
		a.handle_input(input.Decision{Command: id})
	}
	for _, request := range []struct {
		text string
		want string
	}{
		{"SETTING SET speech#enabled=True;unknown#setting=True", "Unsupported remote setting"},
		{"SETTING SET keyboard#word_echo=True", ""},
	} {
		replies := make(chan string, 1)
		a.remote_request(control.Request{UID: 0, Text: request.text, Reply: replies})
		if reply := <-replies; !strings.HasPrefix(reply, request.want) || request.want == "" && reply != "" {
			t.Fatal("unexpected remote response", reply)
		}
		if !voice.muted || a.engine.Automatic_reading() {
			t.Fatal("remote assignment changed unrelated session state")
		}
	}
	for _, id := range []command.ID{command.NextQuickValue, command.SaveSettings, command.Quit} {
		a.handle_input(input.Decision{Command: id})
	}
	if err := a.loop(nil); err != nil || ctx.Err() != nil {
		t.Fatal("save and quit failed", err, ctx.Err())
	}
	saved, _, err := config.Load(path, nil)
	if err != nil {
		t.Fatal(err)
	}
	want := menuSaved
	want.Keyboard.WordEcho = true
	want.Presentation.Speech.Rate = 70
	if saved.Keyboard.Layout != want.Keyboard.Layout || saved.Presentation.Speech.Module != want.Presentation.Speech.Module || saved.Review != want.Review || saved.Presentation.Speech.Rate != want.Presentation.Speech.Rate || !saved.Keyboard.WordEcho || saved.Presentation.Sound != want.Presentation.Sound {
		t.Fatal("mixed settings paths lost saved choices", saved)
	}
	if !saved.Presentation.Speech.Enabled || !saved.Reading.Automatic || saved.Reading.Attributes != base.Reading.Attributes {
		t.Fatal("session overrides leaked into the save", saved)
	}
	freshVoice := &fakeVoice{}
	fresh, err := new_application(ctx, source, &fakeKeys{}, freshVoice, RunOptions{Settings: saved})
	if err != nil {
		t.Fatal(err)
	}
	defer fresh.ui.close()
	if err := fresh.read_screen(); err != nil || !slices.Contains(freshVoice.messages, "alpha") {
		t.Fatal("saved defaults did not restore startup reading", err, freshVoice.messages)
	}
}

func TestRemoteCannotEnableSpeechWithoutStartupConnection(t *testing.T) {
	base := config.Defaults()
	base.Presentation.Speech.Enabled = false
	a, err := new_application(context.Background(), &fakeSource{}, &fakeKeys{}, disabledVoice{}, RunOptions{Settings: base})
	if err != nil {
		t.Fatal(err)
	}
	defer a.ui.close()
	response := a.apply_remote_settings("SET speech#enabled=True;keyboard#word_echo=True")
	if response != "Speech was disabled at startup; enable it in settings and relaunch" {
		t.Fatal(response)
	}
	if !a.muted || a.settings.live.Presentation.Speech.Enabled || a.settings.live.Keyboard.WordEcho || a.settings.saveDraft.Presentation.Speech.Enabled || a.settings.saveDraft.Keyboard.WordEcho {
		t.Fatal("rejected request partially changed live or saved settings")
	}
}