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

package config

import (
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestApplicationDocumentSparseInheritanceAndExplicitValues(t *testing.T) {
	path := filepath.Join(t.TempDir(), "applications", "ninjam.toml")
	base := Defaults()
	doc, err := Open_application_document(path, base)
	if err != nil {
		t.Fatal(err)
	}
	saved := base
	saved.Presentation.Speech.Rate = 12
	saved.Keyboard.WordEcho = true
	if err := doc.Save(saved); err != nil {
		t.Fatal(err)
	}
	data, _ := os.ReadFile(path)
	if strings.Contains(string(data), "driver") || strings.Contains(string(data), "automatic") || strings.Contains(string(data), "version") {
		t.Fatal("inherited values copied", string(data))
	}
	info, _ := os.Stat(path)
	if info.Mode().Perm() != 0600 {
		t.Fatal(info.Mode())
	}
	// A new ordinary voice is inherited; explicitly saved rate/echo survive.
	base.Presentation.Speech.Voice = "New default"
	base.Presentation.Speech.Rate = 12
	doc, err = Open_application_document(path, base)
	if err != nil || doc.Settings.Presentation.Speech.Voice != "New default" || !doc.Settings.Keyboard.WordEcho {
		t.Fatal(doc, err)
	}
	if err := doc.Save(doc.Settings); err != nil {
		t.Fatal(err)
	}
	base.Presentation.Speech.Rate = 60
	doc, err = Open_application_document(path, base)
	if err != nil || doc.Settings.Presentation.Speech.Rate != 12 {
		t.Fatal("explicit value equal to previous base lost", doc, err)
	}
	session := base
	session.Presentation.Speech.Enabled = false
	session.Reading.Automatic = false
	effective := doc.Apply_application(session)
	if effective.Presentation.Speech.Enabled || effective.Reading.Automatic || effective.Presentation.Speech.Rate != 12 {
		t.Fatal("session state overwritten", effective)
	}
}

func TestApplicationDocumentRejectsInvalidProfilesAndExternalChanges(t *testing.T) {
	path := filepath.Join(t.TempDir(), "profile.toml")
	for _, data := range []string{
		"[presentation.speech]\nrate = 101\n",
		"[presentation.speech]\nrate = 'fast'\n",
		"[presentation.speech]\ndriver = 'dectalk'\n",
		"[keyboard]\nlayout = 'laptop'\n",
		"[screen]\nignored_vts = [1]\n",
		"[reading]\nunknown = true\n",
		"[reading]\nmode = 'invalid'\n",
		"[broken",
	} {
		if err := os.WriteFile(path, []byte(data), 0600); err != nil {
			t.Fatal(err)
		}
		if _, err := Open_application_document(path, Defaults()); err == nil {
			t.Fatal("invalid profile accepted", data)
		}
	}
	if err := os.WriteFile(path, []byte("[presentation.speech]\nrate = 10\n"), 0600); err != nil {
		t.Fatal(err)
	}
	doc, err := Open_application_document(path, Defaults())
	if err != nil {
		t.Fatal(err)
	}
	changed := []byte("[presentation.speech]\nrate = 20\n")
	if err := os.WriteFile(path, changed, 0600); err != nil {
		t.Fatal(err)
	}
	if err := doc.Save(doc.Settings); err == nil {
		t.Fatal("external edit overwritten")
	}
	data, _ := os.ReadFile(path)
	if string(data) != string(changed) {
		t.Fatal(string(data))
	}
}

func TestApplicationVoiceSelectionSavedTogether(t *testing.T) {
	path := filepath.Join(t.TempDir(), "profile.toml")
	base := Defaults()
	base.Presentation.Speech.Module = "original-module"
	base.Presentation.Speech.Language = "en"
	doc, err := Open_application_document(path, base)
	if err != nil {
		t.Fatal(err)
	}
	chosen := base
	chosen.Presentation.Speech.Voice = "Application voice"
	if err := doc.Save(chosen); err != nil {
		t.Fatal(err)
	}
	base.Presentation.Speech.Module = "different-module"
	base.Presentation.Speech.Language = "fr"
	doc, err = Open_application_document(path, base)
	if err != nil || doc.Settings.Presentation.Speech.Module != "original-module" || doc.Settings.Presentation.Speech.Language != "en" || doc.Settings.Presentation.Speech.Voice != "Application voice" {
		t.Fatal("coupled voice selection changed", doc, err)
	}
}