// The MIT License (MIT)
//
// Copyright (c) 2016 Naoki Hiroshima
//
// 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

public protocol JsonObjectConvertible {
    subscript(idx: Int) -> Any? { get }
    subscript(key: String) -> Any? { get }
}

extension Optional : JsonObjectConvertible {
    public subscript(idx: Int) -> Any? {
        guard let arr = self as? Array<Any> else { return nil }
        guard arr.count > idx else { return nil }
        return jsonObject(arr[idx])
    }
    
    public subscript(key: String) -> Any? {
        guard let dict = self as? Dictionary<String,Any> else { return nil }
        return jsonObject(dict[key])
    }
    
    private func jsonObject(_ any: Any?) -> Any? {
        switch any {
        case let n as NSNumber: return String(cString: n.objCType) == "c" ? n.boolValue : any
        case is NSNull: return nil
        default: return any
        }
    }
}