//
//  Localizable.swift
//  venezia
//
//  Created by Alessandro Maroso on 19/04/2019.
//  Copyright © 2019 rawfish. All rights reserved.
//

import Foundation

protocol Localizable {
    static func tableName() -> String
    var localized: String { get }
}

extension Localizable where Self: RawRepresentable, Self.RawValue == String {
    /// For a Localizable enum the default table name is the name of the enum enclosing class.
    /// If the enum is not enclosed in a class the table name will be the enum name.
    /// e.g.:
    ///
    ///     class ExampleViewController: UIViewController {
    ///         enum Strings: String, Localizable {
    ///             case title = "title"
    ///         }
    ///     }
    ///
    /// In this case the corresponding filename will be ExampleViewController.strings
    static func tableName() -> String {
        guard let substring = String(reflecting: self).split(separator: ".").dropLast().last else {
            return String(describing: self)
        }
        return String(substring)
    }

    /// Returns the localized string corresponding to the case.
    /// e.g.:
    ///
    ///     class ExampleView: UIView {
    ///         enum Strings: String, Localizable {
    ///             case title = "title"
    ///         }
    ///     }
    ///
    ///     ExampleView.Strings.title.localized
    ///
    /// Will get the localized string with key "title" from the ExampleView.strings file
    var localized: String {
        return rawValue.localized(tableName: Self.tableName())
    }
}

extension String {
    func localized(bundle: Bundle = .main, tableName: String = "Localizable") -> String {
        return NSLocalizedString(self, tableName: tableName, value: "**\(self)**", comment: "")
    }
}