package com.sftp.manager.service;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;

import java.io.File;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;

public class LocalFileServiceTest {

    private final LocalFileService localFileService = new LocalFileService();

    @TempDir
    Path tempDir;

    @Test
    public void createDirectory_shouldRejectParentTraversalPath() {
        String badPath = tempDir.resolve("../escape-dir").toString();

        Exception ex = Assertions.assertThrows(Exception.class,
                () -> localFileService.createDirectory(badPath));

        Assertions.assertTrue(ex.getMessage().contains("上级目录引用"));
    }

    @Test
    public void deleteFile_shouldRejectRootPath() {
        File[] roots = File.listRoots();
        Assertions.assertNotNull(roots);
        Assertions.assertTrue(roots.length > 0);

        String rootPath = roots[0].getPath();

        Exception ex = Assertions.assertThrows(Exception.class,
                () -> localFileService.deleteFile(rootPath));

        Assertions.assertTrue(ex.getMessage().contains("根目录禁止删除"));
    }

    @Test
    public void renameFile_shouldRejectCrossDirectoryRename() throws Exception {
        Path source = tempDir.resolve("source.txt");
        Files.write(source, "data".getBytes(StandardCharsets.UTF_8));

        Path subDir = tempDir.resolve("sub");
        Files.createDirectories(subDir);
        Path target = subDir.resolve("target.txt");

        Exception ex = Assertions.assertThrows(Exception.class,
                () -> localFileService.renameFile(source.toString(), target.toString()));

        Assertions.assertTrue(ex.getMessage().contains("仅支持同目录重命名"));
    }

    @Test
    public void renameFile_shouldAllowRenameInSameDirectory() throws Exception {
        Path source = tempDir.resolve("old-name.txt");
        Files.write(source, "data".getBytes(StandardCharsets.UTF_8));
        Path target = tempDir.resolve("new-name.txt");

        boolean result = localFileService.renameFile(source.toString(), target.toString());

        Assertions.assertTrue(result);
        Assertions.assertFalse(Files.exists(source));
        Assertions.assertTrue(Files.exists(target));
    }

    @Test
    public void fileExists_shouldReturnFalseWhenPathContainsTraversal() {
        boolean exists = localFileService.fileExists("../sensitive-path");

        Assertions.assertFalse(exists);
    }
}