import Foundation

final class Log: @unchecked Sendable {

    enum Level: String, Codable {
        case debug
        case info
        case warning
        case error

        var level: Int {
            switch self {
            case .debug: return 0
            case .info: return 1
            case .warning: return 2
            case .error: return 3
            }
        }
    }

    private var logLevel: Level = .warning

    private let formatter: DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateStyle = .short
        formatter.timeStyle = .short
        return formatter
    }()

    init(logLevel: Level) {
        self.logLevel = logLevel
    }

    private func log(_ level: Level, message: String) {
        guard level.rawValue >= logLevel.rawValue else {
            return
        }
        print("[\(formatter.string(from: Date()))][\(level.rawValue.uppercased())] \(message)")
    }

    func debug(_ message: String) { log(.debug, message: message) }
    func info(_ message: String) { log(.info, message: message) }
    func warning(_ message: String) { log(.warning, message: message) }
    func error(_ message: String) { log(.error, message: message) }

    static func debug(_ message: String) { log.debug(message) }
    static func info(_ message: String) { log.info(message) }
    static func warning(_ message: String) { log.warning(message) }
    static func error(_ message: String) { log.error(message) }

    static let log = Log(logLevel: .warning)
}