//
//  OTGPhotoStorageTests.swift
//  suixinkanTests
//

import XCTest
@testable import suixinkan

/// OTGPhotoFileWriter scoped 路径写入与去重测试。
final class OTGPhotoStorageTests: XCTestCase {
    private let accountKey = "test_account"
    private let albumID = 12345

    override func tearDown() {
        let directory = OTGPhotoFileWriter.originalsDirectory(accountKey: accountKey, albumID: albumID)
        try? FileManager.default.removeItem(at: directory.deletingLastPathComponent())
        super.tearDown()
    }

    /// 测试 scoped 原图目录按账号与相册隔离。
    func testOriginalsDirectoryScopedByAccountAndAlbum() {
        let directory = OTGPhotoFileWriter.originalsDirectory(accountKey: accountKey, albumID: albumID)
        XCTAssertTrue(directory.path.contains("CameraDownloads"))
        XCTAssertTrue(directory.path.contains("\(albumID)"))
        XCTAssertTrue(directory.lastPathComponent == "originals")
        XCTAssertTrue(FileManager.default.fileExists(atPath: directory.path))
    }

    /// 测试 writeImage 落盘并返回相对路径。
    func testWriteImageReturnsRelativePath() throws {
        let data = Data(repeating: 0xAB, count: 64)
        let fileURL = try OTGPhotoFileWriter.writeImage(
            data,
            filename: "DSC_0001.JPG",
            accountKey: accountKey,
            albumID: albumID
        )
        XCTAssertTrue(FileManager.default.fileExists(atPath: fileURL.path))

        let relativePath = OTGPhotoFileWriter.relativePath(for: fileURL)
        XCTAssertFalse(relativePath.hasPrefix("/"))
        XCTAssertTrue(relativePath.contains("DSC_0001.JPG"))

        let resolved = CameraDownloadStorage.resolveLocalURL(from: relativePath)
        XCTAssertEqual(resolved?.standardizedFileURL, fileURL.standardizedFileURL)
    }

    /// 测试同名文件自动追加序号避免覆盖。
    func testUniqueFileURLAppendsCounterForDuplicates() throws {
        let data = Data(repeating: 0xCD, count: 16)
        let firstURL = try OTGPhotoFileWriter.writeImage(
            data,
            filename: "duplicate.JPG",
            accountKey: accountKey,
            albumID: albumID
        )
        let secondURL = try OTGPhotoFileWriter.uniqueFileURL(
            filename: "duplicate.JPG",
            accountKey: accountKey,
            albumID: albumID
        )

        XCTAssertNotEqual(firstURL.lastPathComponent, secondURL.lastPathComponent)
        XCTAssertTrue(secondURL.lastPathComponent.contains("duplicate_1"))
    }

    /// 测试 moveDownloadedFile 将临时文件移入 scoped 目录。
    func testMoveDownloadedFileIntoScopedDirectory() throws {
        let tempURL = FileManager.default.temporaryDirectory.appendingPathComponent("otg-move-test.JPG")
        try Data(repeating: 0xEF, count: 32).write(to: tempURL)
        defer { try? FileManager.default.removeItem(at: tempURL) }

        let destination = try OTGPhotoFileWriter.moveDownloadedFile(
            from: tempURL,
            filename: "imported.JPG",
            accountKey: accountKey,
            albumID: albumID
        )
        XCTAssertTrue(FileManager.default.fileExists(atPath: destination.path))
        XCTAssertFalse(FileManager.default.fileExists(atPath: tempURL.path))
    }
}