//
//  FileOperationTests.swift
//  FileOtterTests
//
//  Created by Sami Samhuri on 2025-08-19.
//

@testable import FileOtter
import XCTest

final class FileOperationTests: XCTestCase {
    var tempDir: URL!
    var sourceFile: URL!
    var destFile: URL!
    
    override func setUpWithError() throws {
        tempDir = URL.temporaryDirectory
            .appendingPathComponent("FileOperationTests-\(UUID().uuidString)")
        try FileManager.default.createDirectory(at: tempDir, withIntermediateDirectories: true)
        
        sourceFile = tempDir.appendingPathComponent("source.txt")
        try "Source content".write(to: sourceFile, atomically: true, encoding: .utf8)
        
        destFile = tempDir.appendingPathComponent("dest.txt")
    }
    
    override func tearDownWithError() throws {
        if FileManager.default.fileExists(atPath: tempDir.path) {
            try FileManager.default.removeItem(at: tempDir)
        }
    }
    
    // MARK: - Link Tests
    
    func testLink() throws {
        // TODO: Implement
        // File.link(source, destination) creates hard link
    }
    
    func testLinkThrowsIfDestExists() throws {
        // TODO: Implement
        // File.link should not overwrite existing file
    }
    
    func testSymlink() throws {
        // TODO: Implement
        // File.symlink(source, destination) creates symbolic link
    }
    
    func testSymlinkThrowsIfDestExists() throws {
        // TODO: Implement
    }
    
    func testReadlink() throws {
        // TODO: Implement
        // File.readlink(url) returns target of symlink
    }
    
    func testReadlinkThrowsForNonSymlink() throws {
        // TODO: Implement
    }
    
    // MARK: - Delete Tests
    
    func testUnlink() throws {
        // TODO: Implement
        // File.unlink(url) deletes file
    }
    
    func testUnlinkThrowsForNonExistent() throws {
        // TODO: Implement
    }
    
    func testDelete() throws {
        // TODO: Implement
        // File.delete(url) is alias for unlink
    }
    
    // MARK: - Rename Tests
    
    func testRename() throws {
        // TODO: Implement
        // File.rename(source, destination) moves/renames file
    }
    
    func testRenameOverwritesExisting() throws {
        // TODO: Implement
        // rename should overwrite if dest exists
    }
    
    func testRenameThrowsForNonExistent() throws {
        // TODO: Implement
    }
    
    // MARK: - Truncate Tests
    
    func testTruncate() throws {
        // TODO: Implement
        // File.truncate(url, size) truncates file to size
    }
    
    func testTruncateExpands() throws {
        // TODO: Implement
        // truncate can expand file with zero padding
    }
    
    func testTruncateThrowsForNonExistent() throws {
        // TODO: Implement
    }
    
    func testInstanceTruncate() throws {
        // TODO: Implement
        // file.truncate(size) truncates open file
    }
    
    // MARK: - Touch Tests
    
    func testTouch() throws {
        // TODO: Implement
        // File.touch(url) updates access/modification times
    }
    
    func testTouchCreatesFile() throws {
        // TODO: Implement
        // touch creates file if it doesn't exist
    }
    
    // MARK: - utime Tests
    
    func testUtime() throws {
        // TODO: Implement
        // File.utime(url, atime, mtime) sets specific times
    }
    
    func testUtimeFollowsSymlinks() throws {
        // TODO: Implement
        // utime affects target of symlink
    }
    
    func testLutime() throws {
        // TODO: Implement
        // File.lutime(url, atime, mtime) sets symlink times
    }
    
    // MARK: - mkfifo Tests
    
    func testMkfifo() throws {
        // TODO: Implement
        // File.mkfifo(url) creates named pipe
    }
    
    func testMkfifoWithPermissions() throws {
        // TODO: Implement
        // File.mkfifo(url, permissions) creates with specific perms
    }
    
    func testMkfifoThrowsIfExists() throws {
        // TODO: Implement
    }
    
    // MARK: - identical Tests
    
    func testIdentical() throws {
        // TODO: Implement
        // File.identical(url1, url2) returns true for same file
    }
    
    func testIdenticalForHardLink() throws {
        // TODO: Implement
        // identical returns true for hard links to same file
    }
    
    func testIdenticalForSymlink() throws {
        // TODO: Implement
        // identical returns true for symlink and target
    }
    
    func testIdenticalForDifferent() throws {
        // TODO: Implement
        // identical returns false for different files
    }
    
    func testIdenticalForSameContent() throws {
        // TODO: Implement
        // identical returns false for files with same content but different inodes
    }
}