import Foundation

public struct CopyFilesTask {

    // MARK: Properties
    
    private let fileService: FileServicing
    
    // MARK: Initialisers
    
    public init(fileService: FileServicing) {
        self.fileService = fileService
    }

    // MARK: Functions
    
    public func callAsFunction(to rootFolder: URL) async throws {
        let filesFolder = URL(at: .folderFiles)
        
        for fileToCopy in Self.filesToCopy {
            try await fileService.copyItem(
                from: filesFolder.appendingPath(fileToCopy),
                to: rootFolder.appendingPath(fileToCopy)
            )
        }
    }
    
}

// MARK: - Helpers

extension CopyFilesTask {
    
    // MARK: Constants
    
    static let filesToCopy: [String] = [
        .fileDockerIgnore,
        .fileGitIgnore,
        .fileLicense,
        .fileReadme
    ]
    
}

// MARK: - URL+Constants

private extension String {
    static let folderFiles = "./Resources/Files"
    static let fileDockerIgnore = ".dockerignore"
    static let fileGitIgnore = ".gitignore"
    static let fileLicense = "LICENSE"
    static let fileReadme = "README.md"
}