// swiftlint:disable all
//
//  X509Extension.swift
//
//  Copyright © 2019 Filippo Maguolo.
//
//  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 class X509Extension {

    let block: ASN1Object

    required init(block: ASN1Object) {
        self.block = block
    }

    public var oid: String? {
        return block.sub(0)?.value as? String
    }

    public var name: String? {
        return OID.description(of: oid ?? "")
    }

    public var isCritical: Bool {
        if block.sub?.count ?? 0 > 2 {
            return block.sub(1)?.value as? Bool ?? false
        }
        return false
    }

    public var value: Any? {
        if let valueBlock = block.sub?.last {
            return firstLeafValue(block: valueBlock)
        }
        return nil
    }

    var valueAsBlock: ASN1Object? {
        return block.sub?.last
    }

    var valueAsStrings: [String] {
        var result: [String] = []
        for item in block.sub?.last?.sub?.last?.sub ?? [] {
            if let name = item.value as? String {
                result.append(name)
            }
        }
        return result
    }
}
// swiftlint:enable all