import { AbortMultipartUploadCommand, CompleteMultipartUploadCommand, CreateMultipartUploadCommand, PutObjectCommand, PutObjectTaggingCommand, UploadPartCommand, } from "@aws-sdk/client-s3";
import { AbortController } from "@smithy/abort-controller";
import { getEndpointFromInstructions, toEndpointV1, } from "@smithy/middleware-endpoint";
import { extendedEncodeURIComponent } from "@smithy/smithy-client";
import { EventEmitter } from "events";
import { byteLength } from "./bytelength";
import { getChunk } from "./chunker";
const MIN_PART_SIZE = 1024 * 1024 * 5;
export class Upload extends EventEmitter {
    constructor(options) {
        super();
        this.MAX_PARTS = 10000;
        this.queueSize = 4;
        this.partSize = MIN_PART_SIZE;
        this.leavePartsOnError = false;
        this.tags = [];
        this.concurrentUploaders = [];
        this.abortMultipartUploadCommand = null;
        this.uploadedParts = [];
        this.uploadEnqueuedPartsCount = 0;
        this.isMultiPart = true;
        this.sent = false;
        this.queueSize = options.queueSize || this.queueSize;
        this.partSize = options.partSize || this.partSize;
        this.leavePartsOnError = options.leavePartsOnError || this.leavePartsOnError;
        this.tags = options.tags || this.tags;
        this.client = options.client;
        this.params = options.params;
        this.__validateInput();
        this.totalBytes = byteLength(this.params.Body);
        this.bytesUploadedSoFar = 0;
        this.abortController = options.abortController ?? new AbortController();
    }
    async abort() {
        this.abortController.abort();
    }
    async done() {
        if (this.sent) {
            throw new Error("@aws-sdk/lib-storage: this instance of Upload has already executed .done(). Create a new instance.");
        }
        this.sent = true;
        return await Promise.race([this.__doMultipartUpload(), this.__abortTimeout(this.abortController.signal)]);
    }
    on(event, listener) {
        this.uploadEvent = event;
        return super.on(event, listener);
    }
    async __uploadUsingPut(dataPart) {
        this.isMultiPart = false;
        const params = { ...this.params, Body: dataPart.data };
        const clientConfig = this.client.config;
        const requestHandler = clientConfig.requestHandler;
        const eventEmitter = requestHandler instanceof EventEmitter ? requestHandler : null;
        const uploadEventListener = (event) => {
            this.bytesUploadedSoFar = event.loaded;
            this.totalBytes = event.total;
            this.__notifyProgress({
                loaded: this.bytesUploadedSoFar,
                total: this.totalBytes,
                part: dataPart.partNumber,
                Key: this.params.Key,
                Bucket: this.params.Bucket,
            });
        };
        if (eventEmitter !== null) {
            eventEmitter.on("xhr.upload.progress", uploadEventListener);
        }
        const resolved = await Promise.all([this.client.send(new PutObjectCommand(params)), clientConfig?.endpoint?.()]);
        const putResult = resolved[0];
        let endpoint = resolved[1];
        if (!endpoint) {
            endpoint = toEndpointV1(await getEndpointFromInstructions(params, PutObjectCommand, {
                ...clientConfig,
            }));
        }
        if (!endpoint) {
            throw new Error('Could not resolve endpoint from S3 "client.config.endpoint()" nor EndpointsV2.');
        }
        if (eventEmitter !== null) {
            eventEmitter.off("xhr.upload.progress", uploadEventListener);
        }
        const locationKey = this.params
            .Key.split("/")
            .map((segment) => extendedEncodeURIComponent(segment))
            .join("/");
        const locationBucket = extendedEncodeURIComponent(this.params.Bucket);
        const Location = (() => {
            const endpointHostnameIncludesBucket = endpoint.hostname.startsWith(`${locationBucket}.`);
            const forcePathStyle = this.client.config.forcePathStyle;
            const optionalPort = endpoint.port ? `:${endpoint.port}` : ``;
            if (forcePathStyle) {
                return `${endpoint.protocol}//${endpoint.hostname}${optionalPort}/${locationBucket}/${locationKey}`;
            }
            if (endpointHostnameIncludesBucket) {
                return `${endpoint.protocol}//${endpoint.hostname}${optionalPort}/${locationKey}`;
            }
            return `${endpoint.protocol}//${locationBucket}.${endpoint.hostname}${optionalPort}/${locationKey}`;
        })();
        this.singleUploadResult = {
            ...putResult,
            Bucket: this.params.Bucket,
            Key: this.params.Key,
            Location,
        };
        const totalSize = byteLength(dataPart.data);
        this.__notifyProgress({
            loaded: totalSize,
            total: totalSize,
            part: 1,
            Key: this.params.Key,
            Bucket: this.params.Bucket,
        });
    }
    async __createMultipartUpload() {
        if (!this.createMultiPartPromise) {
            const createCommandParams = { ...this.params, Body: undefined };
            this.createMultiPartPromise = this.client
                .send(new CreateMultipartUploadCommand(createCommandParams))
                .then((createMpuResponse) => {
                this.abortMultipartUploadCommand = new AbortMultipartUploadCommand({
                    Bucket: this.params.Bucket,
                    Key: this.params.Key,
                    UploadId: createMpuResponse.UploadId,
                });
                return createMpuResponse;
            });
        }
        return this.createMultiPartPromise;
    }
    async __doConcurrentUpload(dataFeeder) {
        for await (const dataPart of dataFeeder) {
            if (this.uploadEnqueuedPartsCount > this.MAX_PARTS) {
                throw new Error(`Exceeded ${this.MAX_PARTS} parts in multipart upload to Bucket: ${this.params.Bucket} Key: ${this.params.Key}.`);
            }
            if (this.abortController.signal.aborted) {
                return;
            }
            if (dataPart.partNumber === 1 && dataPart.lastPart) {
                return await this.__uploadUsingPut(dataPart);
            }
            if (!this.uploadId) {
                const { UploadId } = await this.__createMultipartUpload();
                this.uploadId = UploadId;
                if (this.abortController.signal.aborted) {
                    return;
                }
            }
            const partSize = byteLength(dataPart.data) || 0;
            const requestHandler = this.client.config.requestHandler;
            const eventEmitter = requestHandler instanceof EventEmitter ? requestHandler : null;
            let lastSeenBytes = 0;
            const uploadEventListener = (event, request) => {
                const requestPartSize = Number(request.query["partNumber"]) || -1;
                if (requestPartSize !== dataPart.partNumber) {
                    return;
                }
                if (event.total && partSize) {
                    this.bytesUploadedSoFar += event.loaded - lastSeenBytes;
                    lastSeenBytes = event.loaded;
                }
                this.__notifyProgress({
                    loaded: this.bytesUploadedSoFar,
                    total: this.totalBytes,
                    part: dataPart.partNumber,
                    Key: this.params.Key,
                    Bucket: this.params.Bucket,
                });
            };
            if (eventEmitter !== null) {
                eventEmitter.on("xhr.upload.progress", uploadEventListener);
            }
            this.uploadEnqueuedPartsCount += 1;
            const partResult = await this.client.send(new UploadPartCommand({
                ...this.params,
                ContentLength: undefined,
                UploadId: this.uploadId,
                Body: dataPart.data,
                PartNumber: dataPart.partNumber,
            }));
            if (eventEmitter !== null) {
                eventEmitter.off("xhr.upload.progress", uploadEventListener);
            }
            if (this.abortController.signal.aborted) {
                return;
            }
            if (!partResult.ETag) {
                throw new Error(`Part ${dataPart.partNumber} is missing ETag in UploadPart response. Missing Bucket CORS configuration for ETag header?`);
            }
            this.uploadedParts.push({
                PartNumber: dataPart.partNumber,
                ETag: partResult.ETag,
                ...(partResult.ChecksumCRC32 && { ChecksumCRC32: partResult.ChecksumCRC32 }),
                ...(partResult.ChecksumCRC32C && { ChecksumCRC32C: partResult.ChecksumCRC32C }),
                ...(partResult.ChecksumSHA1 && { ChecksumSHA1: partResult.ChecksumSHA1 }),
                ...(partResult.ChecksumSHA256 && { ChecksumSHA256: partResult.ChecksumSHA256 }),
            });
            if (eventEmitter === null) {
                this.bytesUploadedSoFar += partSize;
            }
            this.__notifyProgress({
                loaded: this.bytesUploadedSoFar,
                total: this.totalBytes,
                part: dataPart.partNumber,
                Key: this.params.Key,
                Bucket: this.params.Bucket,
            });
        }
    }
    async __doMultipartUpload() {
        const dataFeeder = getChunk(this.params.Body, this.partSize);
        const concurrentUploaderFailures = [];
        for (let index = 0; index < this.queueSize; index++) {
            const currentUpload = this.__doConcurrentUpload(dataFeeder).catch((err) => {
                concurrentUploaderFailures.push(err);
            });
            this.concurrentUploaders.push(currentUpload);
        }
        await Promise.all(this.concurrentUploaders);
        if (concurrentUploaderFailures.length >= 1) {
            await this.markUploadAsAborted();
            throw concurrentUploaderFailures[0];
        }
        if (this.abortController.signal.aborted) {
            await this.markUploadAsAborted();
            throw Object.assign(new Error("Upload aborted."), { name: "AbortError" });
        }
        let result;
        if (this.isMultiPart) {
            this.uploadedParts.sort((a, b) => a.PartNumber - b.PartNumber);
            const uploadCompleteParams = {
                ...this.params,
                Body: undefined,
                UploadId: this.uploadId,
                MultipartUpload: {
                    Parts: this.uploadedParts,
                },
            };
            result = await this.client.send(new CompleteMultipartUploadCommand(uploadCompleteParams));
            if (typeof result?.Location === "string" && result.Location.includes("%2F")) {
                result.Location = result.Location.replace(/%2F/g, "/");
            }
        }
        else {
            result = this.singleUploadResult;
        }
        this.abortMultipartUploadCommand = null;
        if (this.tags.length) {
            await this.client.send(new PutObjectTaggingCommand({
                ...this.params,
                Tagging: {
                    TagSet: this.tags,
                },
            }));
        }
        return result;
    }
    async markUploadAsAborted() {
        if (this.uploadId && !this.leavePartsOnError && null !== this.abortMultipartUploadCommand) {
            await this.client.send(this.abortMultipartUploadCommand);
            this.abortMultipartUploadCommand = null;
        }
    }
    __notifyProgress(progress) {
        if (this.uploadEvent) {
            this.emit(this.uploadEvent, progress);
        }
    }
    async __abortTimeout(abortSignal) {
        return new Promise((resolve, reject) => {
            abortSignal.onabort = () => {
                const abortError = new Error("Upload aborted.");
                abortError.name = "AbortError";
                reject(abortError);
            };
        });
    }
    __validateInput() {
        if (!this.params) {
            throw new Error(`InputError: Upload requires params to be passed to upload.`);
        }
        if (!this.client) {
            throw new Error(`InputError: Upload requires a AWS client to do uploads with.`);
        }
        if (this.partSize < MIN_PART_SIZE) {
            throw new Error(`EntityTooSmall: Your proposed upload partsize [${this.partSize}] is smaller than the minimum allowed size [${MIN_PART_SIZE}] (5MB)`);
        }
        if (this.queueSize < 1) {
            throw new Error(`Queue size: Must have at least one uploading queue.`);
        }
    }
}