import {z} from 'zod'

export type GetApiV1VoiceTtsModelsArgs = {provider?: ('elevenlabs' | 'inworld' | null) | undefined};

export type GetApiV1VoiceTtsModelsOptions = {baseUrl: string, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const tTSSpeedCapability = z.object({min: z.number(), max: z.number(), default: z.number()});

export const tTSDeliveryModeCapability = z.object({values: z.array(z.enum(["STABLE", "BALANCED", "CREATIVE"])), default: z.enum(["STABLE", "BALANCED", "CREATIVE"])});

export const tTSTemperatureCapability = z.object({min_exclusive: z.number(), max: z.number(), default: z.number()});

export const tTSTuningCapabilities = z.object({speed: tTSSpeedCapability, delivery_mode: tTSDeliveryModeCapability.nullable().optional(), temperature: tTSTemperatureCapability.nullable().optional()});

export const tTSModelCapabilities = z.object({multilingual: z.boolean(), latency_tier: z.enum(["lowest", "low", "standard"]), max_sample_rate: z.number().int().gt(0), delivery_mode: z.boolean().nullable().optional(), expressive_speech: z.boolean().nullable().optional(), stability_presets: z.boolean().nullable().optional(), tuning: tTSTuningCapabilities});

export const tTSModelOut = z.object({provider: z.enum(["elevenlabs", "inworld"]), external_id: z.string(), display_name: z.string(), description: z.string().nullable().optional(), is_default: z.boolean().optional(), capabilities: tTSModelCapabilities});

export const tTSModelListResponse = z.object({models: z.array(tTSModelOut).optional(), total: z.number().int()});

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
};

/**
 * List Tts Models
 * 
 * GET /v1/voice/tts-models
 */
export const getApiV1VoiceTtsModels = async (args: GetApiV1VoiceTtsModelsArgs, options: GetApiV1VoiceTtsModelsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (args.provider != null) query.append("provider", String(args.provider))
if (APIKeyHeader !== undefined) headers.set("x-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/voice/tts-models${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

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

return validateResponse(tTSModelListResponse, await res.json())
};