export type FramePhoneme = {phoneme: string, frame_length: number, note_id?: (string | null) | undefined};

export type FrameAudioQuery = {f0: Array<number>, volume: Array<number>, phonemes: Array<FramePhoneme>, volumeScale: number, outputSamplingRate: number, outputStereo: boolean};

export type CreateApiFrameSynthesisArgs = {speaker: number, core_version?: string | undefined, body: FrameAudioQuery};

export type CreateApiFrameSynthesisOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

/**
 * Frame Synthesis
 * 
 * POST /frame_synthesis
 */
export const createApiFrameSynthesis = async (args: CreateApiFrameSynthesisArgs, options: CreateApiFrameSynthesisOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "audio/wav")

if (args.speaker != null) query.append("speaker", String(args.speaker))
if (args.core_version != null) query.append("core_version", String(args.core_version))

const url = `${baseUrl.replace(/\/+$/, '')}/frame_synthesis${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return res.blob()
};