import { wrapAudioBufferGetChannelDataMethod } from '../helpers/wrap-audio-buffer-get-channel-data-method';
import { TStartRenderingFactory } from '../types';

export const createStartRendering: TStartRenderingFactory = (
    audioBufferStore,
    cacheTestResult,
    getAudioNodeRenderer,
    getUnrenderedAudioWorkletNodes,
    renderNativeOfflineAudioContext,
    testAudioBufferCopyChannelMethodsOutOfBoundsSupport,
    wrapAudioBufferCopyChannelMethods,
    wrapAudioBufferCopyChannelMethodsOutOfBounds
) => {
    return (destination, nativeOfflineAudioContext) =>
        getAudioNodeRenderer(destination)
            .render(destination, nativeOfflineAudioContext)
            /*
             * Bug #86 & #87: Invoking the renderer of an AudioWorkletNode might be necessary if it has no direct or indirect connection to the
             * destination.
             */
            .then(() =>
                Promise.all(
                    Array.from(getUnrenderedAudioWorkletNodes(nativeOfflineAudioContext)).map((audioWorkletNode) =>
                        getAudioNodeRenderer(audioWorkletNode).render(audioWorkletNode, nativeOfflineAudioContext)
                    )
                )
            )
            .then(() => renderNativeOfflineAudioContext(nativeOfflineAudioContext))
            .then((audioBuffer) => {
                // Bug #5: Safari does not support copyFromChannel() and copyToChannel().
                // Bug #100: Safari does throw a wrong error when calling getChannelData() with an out-of-bounds value.
                if (typeof audioBuffer.copyFromChannel !== 'function') {
                    wrapAudioBufferCopyChannelMethods(audioBuffer);
                    wrapAudioBufferGetChannelDataMethod(audioBuffer);
                    // Bug #157: Firefox does not allow the bufferOffset to be out-of-bounds.
                } else if (
                    !cacheTestResult(testAudioBufferCopyChannelMethodsOutOfBoundsSupport, () =>
                        testAudioBufferCopyChannelMethodsOutOfBoundsSupport(audioBuffer)
                    )
                ) {
                    wrapAudioBufferCopyChannelMethodsOutOfBounds(audioBuffer);
                }

                audioBufferStore.add(audioBuffer);

                return audioBuffer;
            });
};