import {z} from 'zod'

export type V1AudioConfigAudioEncoding = 'LINEAR16' | 'MP3' | 'OGG_OPUS' | 'ALAW' | 'MULAW' | 'FLAC' | 'PCM' | 'WAV';

export type Ttsv1AudioConfig = {audioEncoding?: V1AudioConfigAudioEncoding | undefined, bitRate?: number | undefined, sampleRateHertz?: number | undefined, speakingRate?: number | undefined};

export type Ttsv1SynthesisContext = {previousRequests?: (Array<{text?: string | undefined}>) | undefined};

export type Ttsv1SynthesizeSpeechStreamRequest = {text: string, voiceId: string, audioConfig?: Ttsv1AudioConfig | undefined, modelId: string, language?: string | undefined, deliveryMode?: ('DELIVERY_MODE_UNSPECIFIED' | 'STABLE' | 'BALANCED' | 'CREATIVE') | undefined, temperature?: number | undefined, timestampType?: ('TIMESTAMP_TYPE_UNSPECIFIED' | 'WORD' | 'CHARACTER') | undefined, applyTextNormalization?: ('APPLY_TEXT_NORMALIZATION_UNSPECIFIED' | 'ON' | 'OFF') | undefined, enhanceGeneration?: boolean | undefined, synthesisContext?: Ttsv1SynthesisContext | undefined};

export type CreateApiTtsV1VoiceStreamArgs = {body: Ttsv1SynthesizeSpeechStreamRequest};

export type CreateApiTtsV1VoiceStreamOptions = {baseUrl?: string | undefined, inworldBasic?: string | undefined, fetch?: typeof fetch | undefined};

export const ttsv1SynthesizeSpeechResponse = z.object({audioContent: z.string().optional(), usage: z.object({processedCharactersCount: z.number().int().optional(), modelId: z.string().optional()}).optional(), timestampInfo: z.object({wordAlignment: z.object({words: z.array(z.string()).optional(), wordStartTimeSeconds: z.array(z.number()).optional(), wordEndTimeSeconds: z.array(z.number()).optional(), phoneticDetails: z.array(z.object({wordIndex: z.number().int().optional(), phones: z.array(z.object({phoneSymbol: z.string().optional(), startTimeSeconds: z.number().optional(), durationSeconds: z.number().optional(), visemeSymbol: z.string().optional()})).optional(), isPartial: z.boolean().optional()})).optional()}).optional(), characterAlignment: z.object({characters: z.array(z.string()).optional(), characterStartTimeSeconds: z.array(z.number()).optional(), characterEndTimeSeconds: z.array(z.number()).optional()}).optional()}).optional()});

export const protobufAny = z.object({"@type": z.string().optional()}).and(z.record(z.string(), z.unknown()));

export const rpcStatusStream = z.object({code: z.number().int().optional(), message: z.string().optional(), details: z.array(protobufAny).optional()});

export const createApiTtsV1VoiceStreamResponse = z.object({result: ttsv1SynthesizeSpeechResponse.optional(), error: rpcStatusStream.optional()});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Synthesize speech (stream)
 * 
 * POST /tts/v1/voice:stream
 */
export const createApiTtsV1VoiceStream = async (args: CreateApiTtsV1VoiceStreamArgs, options?: CreateApiTtsV1VoiceStreamOptions) => {
const {baseUrl = "https://api.inworld.ai", fetch: fetchFn = fetch, inworldBasic} = options ?? {}

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

if (inworldBasic !== undefined) headers.set("Authorization", inworldBasic)

const url = `${baseUrl.replace(/\/+$/, '')}/tts/v1/voice:stream${query.size > 0 ? `?${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 validateResponse(createApiTtsV1VoiceStreamResponse, await res.json())
};