import {z} from 'zod'

export type GetApiV1CallsCallIdTranscriptArgs = {call_id: string};

export type GetApiV1CallsCallIdTranscriptOptions = {baseUrl?: string | undefined, PartnerKey?: string | undefined, fetch?: typeof fetch | undefined};

export const turn = z.object({turn_index: z.number().int().optional(), role: z.enum(["user", "assistant"]).optional(), text: z.string().optional(), recorded_at: z.string().optional()});

export const getApiV1CallsCallIdTranscriptResponse = z.object({call_id: z.string().optional(), turns: z.array(turn).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
};

/**
 * Get call transcript
 * 
 * GET /v1/calls/{call_id}/transcript
 */
export const getApiV1CallsCallIdTranscript = async (args: GetApiV1CallsCallIdTranscriptArgs, options?: GetApiV1CallsCallIdTranscriptOptions) => {
const {baseUrl = "https://voice-api.kata.ai", fetch: fetchFn = fetch, PartnerKey} = options ?? {}

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

if (PartnerKey !== undefined) headers.set("X-Partner-Key", PartnerKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/calls/${encodeURIComponent(String(args.call_id))}/transcript${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(getApiV1CallsCallIdTranscriptResponse, await res.json())
};