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

@testable import FileOtter
import XCTest

final class FileOpenTests: XCTestCase {
    var tempDir: URL!
    var testFile: URL!

    override func setUpWithError() throws {
        tempDir = URL.temporaryDirectory
            .appendingPathComponent("FileOpenTests-\(UUID().uuidString)")
        try FileManager.default.createDirectory(at: tempDir, withIntermediateDirectories: true)

        testFile = tempDir.appendingPathComponent("test.txt")
        try "Initial content\nSecond line\n".write(to: testFile, atomically: true, encoding: .utf8)
    }

    override func tearDownWithError() throws {
        if FileManager.default.fileExists(atPath: tempDir.path) {
            try FileManager.default.removeItem(at: tempDir)
        }
    }

    // MARK: - Open Mode Tests

    func testOpenReadMode() throws {
        // TODO: Implement
        // File(url, mode: .read) opens for reading only
    }

    func testOpenWriteMode() throws {
        // TODO: Implement
        // File(url, mode: .write) truncates and opens for writing
    }

    func testOpenAppendMode() throws {
        // TODO: Implement
        // File(url, mode: .append) opens for appending
    }

    func testOpenReadWriteMode() throws {
        // TODO: Implement
        // File(url, mode: .readWrite) opens for read and write
    }

    func testOpenReadWriteNewMode() throws {
        // TODO: Implement
        // File(url, mode: .readWriteNew) truncates and opens for read/write
    }

    func testOpenReadAppendMode() throws {
        // TODO: Implement
        // File(url, mode: .readAppend) opens for read and append
    }

    func testOpenWriteExclusiveMode() throws {
        // TODO: Implement
        // File(url, mode: .writeExclusive) creates new file, fails if exists
    }

    // MARK: - Open Method Tests

    func testStaticOpen() throws {
        // TODO: Implement
        // File.open(url) returns File object
    }

    func testStaticOpenWithBlock() throws {
        // TODO: Implement
        // File.open(url) { file in ... } auto-closes file
    }

    func testStaticOpenWithBlockThrowingError() throws {
        // TODO: Implement
        // File.open with block closes file even on error
    }

    // MARK: - File Creation Tests

    func testOpenCreatesFileInWriteMode() throws {
        // TODO: Implement
        // Opening non-existent file in write mode creates it
    }

    func testOpenFailsInReadModeForNonExistent() throws {
        // TODO: Implement
        // Opening non-existent file in read mode throws error
    }

    func testOpenWithPermissions() throws {
        // TODO: Implement
        // File(url, mode: .write, permissions: 0o644) creates with permissions
    }

    // MARK: - Auto-close Tests

    func testDeinitClosesHandle() throws {
        // TODO: Implement
        // File handle is closed when File object is deallocated
    }

    func testExplicitClose() throws {
        // TODO: Implement
        // file.close() explicitly closes handle
    }

    func testDoubleCloseIsOK() throws {
        // TODO: Implement
        // Calling close() twice doesn't throw
    }

    // MARK: - Locking Tests

    func testFlockShared() throws {
        // TODO: Implement
        // file.flock(.shared) acquires shared lock
    }

    func testFlockExclusive() throws {
        // TODO: Implement
        // file.flock(.exclusive) acquires exclusive lock
    }

    func testFlockUnlock() throws {
        // TODO: Implement
        // file.flock(.unlock) releases lock
    }

    func testFlockNonBlocking() throws {
        // TODO: Implement
        // file.flock(.nonBlocking) returns immediately if can't lock
    }

    // MARK: - Description Tests

    func testDescription() throws {
        // TODO: Implement
        // file.description returns path
    }

    func testDebugDescription() throws {
        // TODO: Implement
        // file.debugDescription includes path and mode
    }
}