package main

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

	"github.com/stretchr/testify/require"
)

func TestDurableReplacementKeepsPrivateCompleteContents(t *testing.T) {
	path := filepath.Join(t.TempDir(), "state.json")
	require.NoError(t, writeFileDurable(path, []byte("first\n")))
	require.NoError(t, writeFileDurable(path, []byte("second\n")))

	data, err := os.ReadFile(path)
	require.NoError(t, err)
	require.Equal(t, "second\n", string(data))

	info, err := os.Stat(path)
	require.NoError(t, err)
	require.Equal(t, os.FileMode(0o600), info.Mode().Perm())

	entries, err := os.ReadDir(filepath.Dir(path))
	require.NoError(t, err)
	require.Len(t, entries, 1)
}

func TestDurableReplacementReportsFailuresAndRemovesTemporaryFiles(t *testing.T) {
	directory := t.TempDir()
	path := filepath.Join(directory, "state.json")
	require.NoError(t, os.Mkdir(path, 0o700))
	require.ErrorContains(t, writeFileDurable(path, []byte("data")), "publish durable file")

	entries, err := os.ReadDir(directory)
	require.NoError(t, err)
	require.Len(t, entries, 1)
	require.True(t, entries[0].IsDir())
	require.ErrorContains(t, writeFileDurable(filepath.Join(directory, "missing", "state"), nil), "create durable temporary file")
}