/**
 * Copyright (c) 2018 Ivan Magda
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

import Foundation
import SourceKittenFramework

// MARK: CommandLineTool

public final class CommandLineTool {

    // MARK: Instance Variables

    private let arguments: [String]

    // MARK: Init

    public init(arguments: [String] = CommandLine.arguments) { 
        self.arguments = arguments
    }

    // MARK: Public API

    public func run() throws {
        guard arguments.count <= 2 else {
            throw Error.illegalArgumentsCount
        }

        let directoryName = arguments.count == 2
            ? arguments[1]
            : FileManager.default.currentDirectoryPath

        let linter = LintFacade(SwiftFileTreeWalker(path: directoryName))
        try linter.lint()
    }

}

// MARK: - CommandLineTool (Error) -

public extension CommandLineTool {
    enum Error: Swift.Error {
        case illegalArgumentsCount
        case failedToLintFiles
    }
}
