// Models.swift
//
// Generated by swagger-codegen
// https://github.com/swagger-api/swagger-codegen
//

import Foundation

protocol JSONEncodable {
    func encodeToJSON() -> Any
}

public enum ErrorResponse : Error {
    case HttpError(statusCode: Int, data: Data?, error: Error)
    case DecodeError(response: Data?, decodeError: DecodeError)
}

open class Response<T> {
    open let statusCode: Int
    open let header: [String: String]
    open let body: T?

    public init(statusCode: Int, header: [String: String], body: T?) {
        self.statusCode = statusCode
        self.header = header
        self.body = body
    }

    public convenience init(response: HTTPURLResponse, body: T?) {
        let rawHeader = response.allHeaderFields
        var header = [String:String]()
        for (key, value) in rawHeader {
            header[key as! String] = value as? String
        }
        self.init(statusCode: response.statusCode, header: header, body: body)
    }
}

public enum Decoded<ValueType> {
    case success(ValueType)
    case failure(DecodeError)
}

public extension Decoded {
    var value: ValueType? {
        switch self {
        case let .success(value):
            return value
        case .failure:
            return nil
        }
    }
}

public enum DecodeError {
    case typeMismatch(expected: String, actual: String)
    case missingKey(key: String)
    case parseError(message: String)
}

private var once = Int()
class Decoders {
    static fileprivate var decoders = Dictionary<String, ((AnyObject, AnyObject?) -> AnyObject)>()

    static func addDecoder<T>(clazz: T.Type, decoder: @escaping ((AnyObject, AnyObject?) -> Decoded<T>)) {
        let key = "\(T.self)"
        decoders[key] = { decoder($0, $1) as AnyObject }
    }

    static func decode<T>(clazz: T.Type, discriminator: String, source: AnyObject) -> Decoded<T> {
        let key = discriminator
        if let decoder = decoders[key], let value = decoder(source, nil) as? Decoded<T> {
            return value
        } else {
            return .failure(.typeMismatch(expected: String(describing: clazz), actual: String(describing: source)))
        }
    }

    static func decode<T>(clazz: [T].Type, source: AnyObject) -> Decoded<[T]> {
        if let sourceArray = source as? [AnyObject] {
            var values = [T]()
            for sourceValue in sourceArray {
                switch Decoders.decode(clazz: T.self, source: sourceValue, instance: nil) {
                case let .success(value):
                    values.append(value)
                case let .failure(error):
                    return .failure(error)
                }
            }
            return .success(values)
        } else {
            return .failure(.typeMismatch(expected: String(describing: clazz), actual: String(describing: source)))
        }
    }

    static func decode<T, Key: Hashable>(clazz: [Key:T].Type, source: AnyObject) -> Decoded<[Key:T]> {
        if let sourceDictionary = source as? [Key: AnyObject] {
            var dictionary = [Key:T]()
            for (key, value) in sourceDictionary {
                switch Decoders.decode(clazz: T.self, source: value, instance: nil) {
                case let .success(value):
                    dictionary[key] = value
                case let .failure(error):
                    return .failure(error)
                }
            }
            return .success(dictionary)
        } else {
            return .failure(.typeMismatch(expected: String(describing: clazz), actual: String(describing: source)))
        }
    }

    static func decodeOptional<T: RawRepresentable>(clazz: T.Type, source: AnyObject?) -> Decoded<T?> {
        guard !(source is NSNull), source != nil else { return .success(nil) }
        if let value = source as? T.RawValue {
            if let enumValue = T.init(rawValue: value) {
                return .success(enumValue)
            } else {
                return .failure(.typeMismatch(expected: "A value from the enumeration \(T.self)", actual: "\(value)"))
            }
        } else {
            return .failure(.typeMismatch(expected: "\(T.RawValue.self) matching a case from the enumeration \(T.self)", actual: String(describing: type(of: source))))
        }
    }

    static func decode<T>(clazz: T.Type, source: AnyObject, instance: AnyObject?) -> Decoded<T> {
        initialize()
        if let value = source.int32Value as? T, source is NSNumber, T.self is Int32.Type {
            return .success(value)
        }
        if let value = source.int32Value as? T, source is NSNumber, T.self is Int64.Type {
            return .success(value)
        }
        if let intermediate = source as? String, let value = UUID(uuidString: intermediate) as? T, source is String, T.self is UUID.Type {
            return .success(value)
        }
        if let value = source as? T {
            return .success(value)
        }
        if let intermediate = source as? String, let value = Data(base64Encoded: intermediate) as? T {
            return .success(value)
        }

        let key = "\(T.self)"
        if let decoder = decoders[key], let value = decoder(source, instance) as? Decoded<T> {
           return value
        } else {
            return .failure(.typeMismatch(expected: String(describing: clazz), actual: String(describing: source)))
        }
    }

    //Convert a Decoded so that its value is optional. DO WE STILL NEED THIS?
    static func toOptional<T>(decoded: Decoded<T>) -> Decoded<T?> {
        return .success(decoded.value)
    }

    static func decodeOptional<T>(clazz: T.Type, source: AnyObject?) -> Decoded<T?> {
        if let source = source, !(source is NSNull) {
            switch Decoders.decode(clazz: clazz, source: source, instance: nil) {
            case let .success(value): return .success(value)
            case let .failure(error): return .failure(error)
            }
        } else {
            return .success(nil)
        }
    }

    static func decodeOptional<T>(clazz: [T].Type, source: AnyObject?) -> Decoded<[T]?> {
        if let source = source as? [AnyObject] {
            var values = [T]()
            for sourceValue in source {
                switch Decoders.decode(clazz: T.self, source: sourceValue, instance: nil) {
                case let .success(value): values.append(value)
                case let .failure(error): return .failure(error)
                }
            }
            return .success(values)
        } else {
            return .success(nil)
        }
    }

    static func decodeOptional<T, Key: Hashable>(clazz: [Key:T].Type, source: AnyObject?) -> Decoded<[Key:T]?> {
        if let sourceDictionary = source as? [Key: AnyObject] {
            var dictionary = [Key:T]()
            for (key, value) in sourceDictionary {
                switch Decoders.decode(clazz: T.self, source: value, instance: nil) {
                case let .success(value): dictionary[key] = value
                case let .failure(error): return .failure(error)
                }
            }
            return .success(dictionary)
        } else {
            return .success(nil)
        }
    }

    static func decodeOptional<T: RawRepresentable, U: AnyObject where T.RawValue == U>(clazz: T, source: AnyObject) -> Decoded<T?> {
        if let value = source as? U {
            if let enumValue = T.init(rawValue: value) {
                return .success(enumValue)
            } else {
                return .failure(.typeMismatch(expected: "A value from the enumeration \(T.self)", actual: "\(value)"))
            }
        } else {
            return .failure(.typeMismatch(expected: "String", actual: String(describing: type(of: source))))
        }
    }


    private static var __once: () = {
        let formatters = [
            "yyyy-MM-dd",
            "yyyy-MM-dd'T'HH:mm:ssZZZZZ",
            "yyyy-MM-dd'T'HH:mm:ss.SSSZZZZZ",
            "yyyy-MM-dd'T'HH:mm:ss'Z'",
            "yyyy-MM-dd'T'HH:mm:ss.SSS",
            "yyyy-MM-dd HH:mm:ss"
        ].map { (format: String) -> DateFormatter in
            let formatter = DateFormatter()
            formatter.dateFormat = format
            return formatter
        }
        // Decoder for Date
        Decoders.addDecoder(clazz: Date.self) { (source: AnyObject, instance: AnyObject?) -> Decoded<Date> in
           if let sourceString = source as? String {
                for formatter in formatters {
                    if let date = formatter.date(from: sourceString) {
                        return .success(date)
                    }
                }
            }
            if let sourceInt = source as? Int {
                // treat as a java date
                return .success(Date(timeIntervalSince1970: Double(sourceInt / 1000) ))
            }
            if source is String || source is Int {
                return .failure(.parseError(message: "Could not decode date"))
            } else {
                return .failure(.typeMismatch(expected: "String or Int", actual: "\(source)"))
            }
        }

        // Decoder for ISOFullDate
        Decoders.addDecoder(clazz: ISOFullDate.self) { (source: AnyObject, instance: AnyObject?) -> Decoded<ISOFullDate> in
            if let string = source as? String,
               let isoDate = ISOFullDate.from(string: string) {
                return .success(isoDate)
            } else {
            	return .failure(.typeMismatch(expected: "ISO date", actual: "\(source)"))
            }
        } {{#models}}{{#model}}

{{^isArrayModel}}
        // Decoder for [{{{classname}}}]
            return Decoders.decode(clazz: [{{{classname}}}].self, source: source, instance: instance)
        }
        // Decoder for {{{classname}}}
        Decoders.addDecoder(clazz: {{{classname}}}.self) { (source: AnyObject, instance: AnyObject?) -> Decoded<{{{classname}}}> in
{{#isEnum}}
            //TODO: I don't think we need this anymore
            return Decoders.decode(clazz: {{{classname}}}.self, source: source, instance: instance)
{{/isEnum}}
{{^isEnum}}
{{#allVars.isEmpty}}
            if let source = source as? {{dataType}} {
                return .success(source)
            } else {
                return .failure(.typeMismatch(expected: "Typealias {{classname}}", actual: "\(source)"))
            }
{{/allVars.isEmpty}}
{{^allVars.isEmpty}}
            if let sourceDictionary = source as? [AnyHashable: Any] {
            {{#discriminator}}
                // Check discriminator to support inheritance
                if let discriminator = sourceDictionary["{{discriminator}}"] as? String, instance == nil && discriminator != "{{classname}}"{
                    return Decoders.decode(clazz: {{classname}}.self, discriminator: discriminator, source: source)
                }
            {{/discriminator}}

            {{#unwrapRequired}}
                {{#requiredVars}}
                guard let {{name}}Source = sourceDictionary["{{baseName}}"] as AnyObject? else {
                    return .failure(.missingKey(key: "{{baseName}}"))
                }
                guard let {{name}} = Decoders.decode(clazz: {{#isEnum}}{{^isListContainer}}{{classname}}.{{enumName}}.self{{/isListContainer}}{{#isListContainer}}Array<{{classname}}.{{enumName}}>.self{{/isListContainer}}{{/isEnum}}{{^isEnum}}{{{datatype}}}.self{{/isEnum}}.self, source: {{name}}Source).value else {
                    return .failure(.typeMismatch(expected: "{{classname}}", actual: "\({{name}}Source)"))
                }
                {{/requiredVars}}
                let result = {{classname}}({{#requiredVars}}{{^-first}}, {{/-first}}{{name}}: {{name}}{{/requiredVars}})
            {{#optionalVars}}
                switch Decoders.decodeOptional(clazz: {{#isEnum}}{{^isListContainer}}{{classname}}.{{enumName}}.self{{/isListContainer}}{{#isListContainer}}Array<{{classname}}.{{enumName}}>.self{{/isListContainer}}{{/isEnum}}{{^isEnum}}{{{datatype}}}.self{{/isEnum}}, source: sourceDictionary["{{baseName}}"] as AnyObject?) {
                case let .success(value): instance.{{name}} = value
                case let .failure(error): return .failure(error)
                }
            {{/optionalVars}}
            {{/unwrapRequired}}
            {{^unwrapRequired}}
                let result = instance == nil ? {{classname}}() : instance as! {{classname}}
                {{#parent}}
                if decoders["\({{parent}}.self)"] != nil {
                  _ = Decoders.decode(clazz: {{parent}}.self, source: source, instance: result)
                }
                {{/parent}}
                {{#allVars}}
                switch Decoders.decodeOptional(clazz: {{#isEnum}}{{^isListContainer}}{{classname}}.{{enumName}}.self{{/isListContainer}}{{#isListContainer}}Array<{{classname}}.{{enumName}}>.self{{/isListContainer}}{{/isEnum}}{{^isEnum}}{{{datatype}}}.self{{/isEnum}}, source: sourceDictionary["{{baseName}}"] as AnyObject?) {
                {{#isEnum}}{{#isMapContainer}}/*{{/isMapContainer}}{{/isEnum}}
                case let .success(value): result.{{name}} = value
                case let .failure(error): return .failure(error)
                {{#isEnum}}{{#isMapContainer}}*/ default: break //TODO: handle enum map scenario{{/isMapContainer}}{{/isEnum}}
                }
            {{/allVars}}
            {{/unwrapRequired}}
                return .success(result)
            } else {
                return .failure(.typeMismatch(expected: "{{classname}}", actual: "\(source)"))
            }
{{/allVars.isEmpty}}
{{/isEnum}}
        }{{/isArrayModel}}{{/model}}
        {{/models}}
    }()

    static fileprivate func initialize() {
        _ = Decoders.__once
    }
}