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

import (
	"git.stormux.org/storm/cthulhu/internal/interaction"
	"os"
	"path/filepath"
	"reflect"
	"testing"
)

func TestPageStoreAtomicPersistenceAndExternalEdits(t *testing.T) {
	path := filepath.Join(t.TempDir(), "preferences.json")
	store := &PageStore{Path: path}
	values, err := store.Load()
	if err != nil || len(values) != 0 {
		t.Fatal(values, err)
	}
	if _, err := os.Stat(path); !os.IsNotExist(err) {
		t.Fatal("load created a file")
	}
	values["probe"] = map[string]map[string]interaction.Value{"page": {"name": {Text: "Example"}}}
	if err := store.Save(values); err != nil {
		t.Fatal(err)
	}
	info, _ := os.Stat(path)
	if info.Mode().Perm() != 0600 {
		t.Fatal(info.Mode())
	}
	other := &PageStore{Path: path}
	loaded, err := other.Load()
	if err != nil || !reflect.DeepEqual(loaded, values) {
		t.Fatal(loaded, err)
	}
	loaded["probe"]["page"]["name"] = interaction.Value{Text: "Changed"}
	if err := other.Save(loaded); err != nil {
		t.Fatal(err)
	}
	if err := store.Save(values); err == nil {
		t.Fatal("overwrote another editor")
	}
	after, err := (&PageStore{Path: path}).Load()
	if err != nil || after["probe"]["page"]["name"].Text != "Changed" {
		t.Fatal(after, err)
	}
}
func TestPageStoreRejectsSymlinksMalformedAndUnloadedWrites(t *testing.T) {
	directory := t.TempDir()
	path := filepath.Join(directory, "preferences.json")
	store := &PageStore{Path: path}
	if store.Save(PageValues{}) == nil {
		t.Fatal("saved without loading")
	}
	for _, data := range []string{`null`, `{"probe":{},"probe":{}}`, `{"probe":`, `[]`} {
		if err := os.WriteFile(path, []byte(data), 0600); err != nil {
			t.Fatal(err)
		}
		if _, err := store.Load(); err == nil {
			t.Fatal("accepted", data)
		}
		if store.Save(PageValues{}) == nil {
			t.Fatal("saved after a failed load")
		}
	}
	link := filepath.Join(directory, "link")
	if err := os.Symlink(path, link); err != nil {
		t.Fatal(err)
	}
	if _, err := (&PageStore{Path: link}).Load(); err == nil {
		t.Fatal("followed a symlink")
	}
}