"use strict";
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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 });
const stream_1 = require("stream");
const index_1 = require("../../builder/index");
/** @ignore */
function builderThroughNodeStream(options) {
    return new BuilderDuplex(index_1.Builder.new(options), options);
}
exports.builderThroughNodeStream = builderThroughNodeStream;
/** @ignore */
class BuilderDuplex extends stream_1.Duplex {
    constructor(builder, options) {
        const { queueingStrategy = 'count', autoDestroy = true } = options;
        const { highWaterMark = queueingStrategy !== 'bytes' ? 1000 : 2 ** 14 } = options;
        super({ autoDestroy, highWaterMark: 1, allowHalfOpen: true, writableObjectMode: true, readableObjectMode: true });
        this._numChunks = 0;
        this._finished = false;
        this._builder = builder;
        this._desiredSize = highWaterMark;
        this._getSize = queueingStrategy !== 'bytes' ? builderLength : builderByteLength;
    }
    _read(size) {
        this._maybeFlush(this._builder, this._desiredSize = size);
    }
    _final(cb) {
        this._maybeFlush(this._builder.finish(), this._desiredSize);
        cb && cb();
    }
    _write(value, _, cb) {
        const result = this._maybeFlush(this._builder.append(value), this._desiredSize);
        cb && cb();
        return result;
    }
    _destroy(err, cb) {
        this._builder.clear();
        cb && cb(err);
    }
    _maybeFlush(builder, size) {
        if (this._getSize(builder) >= size) {
            ++this._numChunks && this.push(builder.toVector());
        }
        if (builder.finished) {
            if (builder.length > 0 || this._numChunks === 0) {
                ++this._numChunks && this.push(builder.toVector());
            }
            if (!this._finished && (this._finished = true)) {
                this.push(null);
            }
            return false;
        }
        return this._getSize(builder) < this.writableHighWaterMark;
    }
}
/** @ignore */ const builderLength = (builder) => builder.length;
/** @ignore */ const builderByteLength = (builder) => builder.byteLength;

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