import { NoReactInternals } from 'remotion/no-react';
export const onlyArtifact = async ({ assets, frameBuffer, }) => {
    const artifacts = assets.filter((asset) => asset.type === 'artifact');
    let frameBufferUint8 = null;
    const result = [];
    for (const artifact of artifacts) {
        if (artifact.contentType === 'binary' || artifact.contentType === 'text') {
            result.push({
                frame: artifact.frame,
                content: artifact.content,
                filename: artifact.filename,
                downloadBehavior: artifact.downloadBehavior,
            });
            continue;
        }
        if (artifact.contentType === 'thumbnail') {
            if (frameBuffer === null) {
                // A thumbnail artifact was defined to be emitted, but the output was not a video.
                // Also, in Lambda, there are extra frames which are not video frames.
                // This could happen if a thumbnail is unconditionally emitted.
                continue;
            }
            const ab = frameBuffer instanceof Blob
                ? await frameBuffer.arrayBuffer()
                : new Uint8Array(await (await frameBuffer.convertToBlob({ type: 'image/png' })).arrayBuffer());
            frameBufferUint8 = new Uint8Array(ab);
            result.push({
                frame: artifact.frame,
                content: frameBufferUint8,
                filename: artifact.filename,
                downloadBehavior: artifact.downloadBehavior,
            });
            continue;
        }
        throw new Error('Unknown artifact type: ' + artifact);
    }
    return result.filter(NoReactInternals.truthy);
};
export const handleArtifacts = () => {
    const previousArtifacts = [];
    const handle = async ({ imageData, frame, assets: artifactAssets, onArtifact, }) => {
        const artifacts = await onlyArtifact({
            assets: artifactAssets,
            frameBuffer: imageData,
        });
        for (const artifact of artifacts) {
            const previousArtifact = previousArtifacts.find((a) => a.filename === artifact.filename);
            if (previousArtifact) {
                throw new Error(`An artifact with output "${artifact.filename}" was already registered at frame ${previousArtifact.frame}, but now registered again at frame ${frame}. Artifacts must have unique names. https://remotion.dev/docs/artifacts`);
            }
            onArtifact(artifact);
            previousArtifacts.push({ frame, filename: artifact.filename });
        }
    };
    return { handle };
};