import * as asn1js from "asn1js";
import { getParametersValue, toBase64, arrayBufferToString, stringToArrayBuffer, fromBase64, clearProps } from "pvutils";
import OtherPrimeInfo from "./OtherPrimeInfo.js";
//**************************************************************************************
/**
 * Class from RFC3447
 */
export default class RSAPrivateKey
{
	//**********************************************************************************
	/**
	 * Constructor for RSAPrivateKey class
	 * @param {Object} [parameters={}]
	 * @param {Object} [parameters.schema] asn1js parsed value to initialize the class from
	 */
	constructor(parameters = {})
	{
		//region Internal properties of the object
		/**
		 * @type {number}
		 * @desc version
		 */
		this.version = getParametersValue(parameters, "version", RSAPrivateKey.defaultValues("version"));
		/**
		 * @type {Integer}
		 * @desc modulus
		 */
		this.modulus = getParametersValue(parameters, "modulus", RSAPrivateKey.defaultValues("modulus"));
		/**
		 * @type {Integer}
		 * @desc publicExponent
		 */
		this.publicExponent = getParametersValue(parameters, "publicExponent", RSAPrivateKey.defaultValues("publicExponent"));
		/**
		 * @type {Integer}
		 * @desc privateExponent
		 */
		this.privateExponent = getParametersValue(parameters, "privateExponent", RSAPrivateKey.defaultValues("privateExponent"));
		/**
		 * @type {Integer}
		 * @desc prime1
		 */
		this.prime1 = getParametersValue(parameters, "prime1", RSAPrivateKey.defaultValues("prime1"));
		/**
		 * @type {Integer}
		 * @desc prime2
		 */
		this.prime2 = getParametersValue(parameters, "prime2", RSAPrivateKey.defaultValues("prime2"));
		/**
		 * @type {Integer}
		 * @desc exponent1
		 */
		this.exponent1 = getParametersValue(parameters, "exponent1", RSAPrivateKey.defaultValues("exponent1"));
		/**
		 * @type {Integer}
		 * @desc exponent2
		 */
		this.exponent2 = getParametersValue(parameters, "exponent2", RSAPrivateKey.defaultValues("exponent2"));
		/**
		 * @type {Integer}
		 * @desc coefficient
		 */
		this.coefficient = getParametersValue(parameters, "coefficient", RSAPrivateKey.defaultValues("coefficient"));

		if("otherPrimeInfos" in parameters)
			/**
			 * @type {Array.<OtherPrimeInfo>}
			 * @desc otherPrimeInfos
			 */
			this.otherPrimeInfos = getParametersValue(parameters, "otherPrimeInfos", RSAPrivateKey.defaultValues("otherPrimeInfos"));
		//endregion

		//region If input argument array contains "schema" for this object
		if("schema" in parameters)
			this.fromSchema(parameters.schema);
		//endregion
		//region If input argument array contains "json" for this object
		if("json" in parameters)
			this.fromJSON(parameters.json);
		//endregion
	}
	//**********************************************************************************
	/**
	 * Return default values for all class members
	 * @param {string} memberName String name for a class member
	 */
	static defaultValues(memberName)
	{
		switch(memberName)
		{
			case "version":
				return 0;
			case "modulus":
				return new asn1js.Integer();
			case "publicExponent":
				return new asn1js.Integer();
			case "privateExponent":
				return new asn1js.Integer();
			case "prime1":
				return new asn1js.Integer();
			case "prime2":
				return new asn1js.Integer();
			case "exponent1":
				return new asn1js.Integer();
			case "exponent2":
				return new asn1js.Integer();
			case "coefficient":
				return new asn1js.Integer();
			case "otherPrimeInfos":
				return [];
			default:
				throw new Error(`Invalid member name for RSAPrivateKey class: ${memberName}`);
		}
	}
	//**********************************************************************************
	/**
	 * Return value of pre-defined ASN.1 schema for current class
	 *
	 * ASN.1 schema:
	 * ```asn1
	 * RSAPrivateKey ::= Sequence {
	 *    version           Version,
	 *    modulus           Integer,  -- n
	 *    publicExponent    Integer,  -- e
	 *    privateExponent   Integer,  -- d
	 *    prime1            Integer,  -- p
	 *    prime2            Integer,  -- q
	 *    exponent1         Integer,  -- d mod (p-1)
	 *    exponent2         Integer,  -- d mod (q-1)
	 *    coefficient       Integer,  -- (inverse of q) mod p
	 *    otherPrimeInfos   OtherPrimeInfos OPTIONAL
	 * }
	 *
	 * OtherPrimeInfos ::= Sequence SIZE(1..MAX) OF OtherPrimeInfo
	 * ```
	 *
	 * @param {Object} parameters Input parameters for the schema
	 * @returns {Object} asn1js schema object
	 */
	static schema(parameters = {})
	{
		/**
		 * @type {Object}
		 * @property {string} [blockName]
		 * @property {string} [version]
		 * @property {string} [modulus]
		 * @property {string} [publicExponent]
		 * @property {string} [privateExponent]
		 * @property {string} [prime1]
		 * @property {string} [prime2]
		 * @property {string} [exponent1]
		 * @property {string} [exponent2]
		 * @property {string} [coefficient]
		 * @property {string} [otherPrimeInfosName]
		 * @property {Object} [otherPrimeInfo]
		 */
		const names = getParametersValue(parameters, "names", {});

		return (new asn1js.Sequence({
			name: (names.blockName || ""),
			value: [
				new asn1js.Integer({ name: (names.version || "") }),
				new asn1js.Integer({ name: (names.modulus || "") }),
				new asn1js.Integer({ name: (names.publicExponent || "") }),
				new asn1js.Integer({ name: (names.privateExponent || "") }),
				new asn1js.Integer({ name: (names.prime1 || "") }),
				new asn1js.Integer({ name: (names.prime2 || "") }),
				new asn1js.Integer({ name: (names.exponent1 || "") }),
				new asn1js.Integer({ name: (names.exponent2 || "") }),
				new asn1js.Integer({ name: (names.coefficient || "") }),
				new asn1js.Sequence({
					optional: true,
					value: [
						new asn1js.Repeated({
							name: (names.otherPrimeInfosName || ""),
							value: OtherPrimeInfo.schema(names.otherPrimeInfo || {})
						})
					]
				})
			]
		}));
	}
	//**********************************************************************************
	/**
	 * Convert parsed asn1js object into current class
	 * @param {!Object} schema
	 */
	fromSchema(schema)
	{
		//region Clear input data first
		clearProps(schema, [
			"version",
			"modulus",
			"publicExponent",
			"privateExponent",
			"prime1",
			"prime2",
			"exponent1",
			"exponent2",
			"coefficient",
			"otherPrimeInfos"
		]);
		//endregion
		
		//region Check the schema is valid
		const asn1 = asn1js.compareSchema(schema,
			schema,
			RSAPrivateKey.schema({
				names: {
					version: "version",
					modulus: "modulus",
					publicExponent: "publicExponent",
					privateExponent: "privateExponent",
					prime1: "prime1",
					prime2: "prime2",
					exponent1: "exponent1",
					exponent2: "exponent2",
					coefficient: "coefficient",
					otherPrimeInfo: {
						names: {
							blockName: "otherPrimeInfos"
						}
					}
				}
			})
		);

		if(asn1.verified === false)
			throw new Error("Object's schema was not verified against input data for RSAPrivateKey");
		//endregion

		//region Get internal properties from parsed schema
		this.version = asn1.result.version.valueBlock.valueDec;
		this.modulus = asn1.result.modulus.convertFromDER(256);
		this.publicExponent = asn1.result.publicExponent;
		this.privateExponent = asn1.result.privateExponent.convertFromDER(256);
		this.prime1 = asn1.result.prime1.convertFromDER(128);
		this.prime2 = asn1.result.prime2.convertFromDER(128);
		this.exponent1 = asn1.result.exponent1.convertFromDER(128);
		this.exponent2 = asn1.result.exponent2.convertFromDER(128);
		this.coefficient = asn1.result.coefficient.convertFromDER(128);

		if("otherPrimeInfos" in asn1.result)
			this.otherPrimeInfos = Array.from(asn1.result.otherPrimeInfos, element => new OtherPrimeInfo({ schema: element }));
		//endregion
	}
	//**********************************************************************************
	/**
	 * Convert current object to asn1js object and set correct values
	 * @returns {Object} asn1js object
	 */
	toSchema()
	{
		//region Create array for output sequence
		const outputArray = [];
		
		outputArray.push(new asn1js.Integer({ value: this.version }));
		outputArray.push(this.modulus.convertToDER());
		outputArray.push(this.publicExponent);
		outputArray.push(this.privateExponent.convertToDER());
		outputArray.push(this.prime1.convertToDER());
		outputArray.push(this.prime2.convertToDER());
		outputArray.push(this.exponent1.convertToDER());
		outputArray.push(this.exponent2.convertToDER());
		outputArray.push(this.coefficient.convertToDER());
		
		if("otherPrimeInfos" in this)
		{
			outputArray.push(new asn1js.Sequence({
				value: Array.from(this.otherPrimeInfos, element => element.toSchema())
			}));
		}
		//endregion
		
		//region Construct and return new ASN.1 schema for this object
		return (new asn1js.Sequence({
			value: outputArray
		}));
		//endregion
	}
	//**********************************************************************************
	/**
	 * Convertion for the class to JSON object
	 * @returns {Object}
	 */
	toJSON()
	{
		const jwk = {
			n: toBase64(arrayBufferToString(this.modulus.valueBlock.valueHex), true, true, true),
			e: toBase64(arrayBufferToString(this.publicExponent.valueBlock.valueHex), true, true, true),
			d: toBase64(arrayBufferToString(this.privateExponent.valueBlock.valueHex), true, true, true),
			p: toBase64(arrayBufferToString(this.prime1.valueBlock.valueHex), true, true, true),
			q: toBase64(arrayBufferToString(this.prime2.valueBlock.valueHex), true, true, true),
			dp: toBase64(arrayBufferToString(this.exponent1.valueBlock.valueHex), true, true, true),
			dq: toBase64(arrayBufferToString(this.exponent2.valueBlock.valueHex), true, true, true),
			qi: toBase64(arrayBufferToString(this.coefficient.valueBlock.valueHex), true, true, true)
		};

		if("otherPrimeInfos" in this)
			jwk.oth = Array.from(this.otherPrimeInfos, element => element.toJSON());

		return jwk;
	}
	//**********************************************************************************
	/**
	 * Convert JSON value into current object
	 * @param {Object} json
	 */
	fromJSON(json)
	{
		if("n" in json)
			this.modulus = new asn1js.Integer({ valueHex: stringToArrayBuffer(fromBase64(json.n, true, true)) });
		else
			throw new Error("Absent mandatory parameter \"n\"");

		if("e" in json)
			this.publicExponent = new asn1js.Integer({ valueHex: stringToArrayBuffer(fromBase64(json.e, true, true)) });
		else
			throw new Error("Absent mandatory parameter \"e\"");

		if("d" in json)
			this.privateExponent = new asn1js.Integer({ valueHex: stringToArrayBuffer(fromBase64(json.d, true, true)) });
		else
			throw new Error("Absent mandatory parameter \"d\"");

		if("p" in json)
			this.prime1 = new asn1js.Integer({ valueHex: stringToArrayBuffer(fromBase64(json.p, true, true)) });
		else
			throw new Error("Absent mandatory parameter \"p\"");

		if("q" in json)
			this.prime2 = new asn1js.Integer({ valueHex: stringToArrayBuffer(fromBase64(json.q, true, true)) });
		else
			throw new Error("Absent mandatory parameter \"q\"");

		if("dp" in json)
			this.exponent1 = new asn1js.Integer({ valueHex: stringToArrayBuffer(fromBase64(json.dp, true, true)) });
		else
			throw new Error("Absent mandatory parameter \"dp\"");

		if("dq" in json)
			this.exponent2 = new asn1js.Integer({ valueHex: stringToArrayBuffer(fromBase64(json.dq, true, true)) });
		else
			throw new Error("Absent mandatory parameter \"dq\"");

		if("qi" in json)
			this.coefficient = new asn1js.Integer({ valueHex: stringToArrayBuffer(fromBase64(json.qi, true, true)) });
		else
			throw new Error("Absent mandatory parameter \"qi\"");

		if("oth" in json)
			this.otherPrimeInfos = Array.from(json.oth, element => new OtherPrimeInfo({ json: element }));
	}
	//**********************************************************************************
}
//**************************************************************************************