/*! @azure/msal-common v14.4.0 2023-11-07 */
'use strict';
import { Constants } from './Constants.mjs';
import { createClientAuthError } from '../error/ClientAuthError.mjs';
import { noCryptoObject, invalidState } from '../error/ClientAuthErrorCodes.mjs';

/*
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
/**
 * Class which provides helpers for OAuth 2.0 protocol specific values
 */
class ProtocolUtils {
    /**
     * Appends user state with random guid, or returns random guid.
     * @param userState
     * @param randomGuid
     */
    static setRequestState(cryptoObj, userState, meta) {
        const libraryState = ProtocolUtils.generateLibraryState(cryptoObj, meta);
        return userState
            ? `${libraryState}${Constants.RESOURCE_DELIM}${userState}`
            : libraryState;
    }
    /**
     * Generates the state value used by the common library.
     * @param randomGuid
     * @param cryptoObj
     */
    static generateLibraryState(cryptoObj, meta) {
        if (!cryptoObj) {
            throw createClientAuthError(noCryptoObject);
        }
        // Create a state object containing a unique id and the timestamp of the request creation
        const stateObj = {
            id: cryptoObj.createNewGuid(),
        };
        if (meta) {
            stateObj.meta = meta;
        }
        const stateString = JSON.stringify(stateObj);
        return cryptoObj.base64Encode(stateString);
    }
    /**
     * Parses the state into the RequestStateObject, which contains the LibraryState info and the state passed by the user.
     * @param state
     * @param cryptoObj
     */
    static parseRequestState(cryptoObj, state) {
        if (!cryptoObj) {
            throw createClientAuthError(noCryptoObject);
        }
        if (!state) {
            throw createClientAuthError(invalidState);
        }
        try {
            // Split the state between library state and user passed state and decode them separately
            const splitState = state.split(Constants.RESOURCE_DELIM);
            const libraryState = splitState[0];
            const userState = splitState.length > 1
                ? splitState.slice(1).join(Constants.RESOURCE_DELIM)
                : Constants.EMPTY_STRING;
            const libraryStateString = cryptoObj.base64Decode(libraryState);
            const libraryStateObj = JSON.parse(libraryStateString);
            return {
                userRequestState: userState || Constants.EMPTY_STRING,
                libraryState: libraryStateObj,
            };
        }
        catch (e) {
            throw createClientAuthError(invalidState);
        }
    }
}

export { ProtocolUtils };
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