"use strict";
/*
 * Tencent is pleased to support the open source community by making
 * Hippy available.
 *
 * Copyright (C) 2017-2019 THL A29 Limited, a Tencent company.
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.composeMiddlewares = void 0;
/**
 * convert middleware array to one middleware
 */
const composeMiddlewares = (middlewareList) => {
    if (!Array.isArray(middlewareList))
        throw new Error('middlewareList must by array');
    for (const fn of middlewareList) {
        if (typeof fn !== 'function')
            throw new Error('Middleware must by function');
    }
    return (context, next) => {
        let lastMiddlewareIndex = -1;
        return dispatch(0);
        function dispatch(i) {
            if (i <= lastMiddlewareIndex)
                return Promise.reject(new Error('next() could not invoke multiple times'));
            lastMiddlewareIndex = i;
            let fn = middlewareList[i];
            if (i === middlewareList.length)
                fn = next;
            if (!fn)
                return Promise.resolve();
            try {
                return fn(context, dispatch.bind(null, i + 1));
            }
            catch (err) {
                return Promise.reject(err);
            }
        }
    };
};
exports.composeMiddlewares = composeMiddlewares;
