import {z} from 'zod'

export type PersonaImageRequest = {name: string, description: string, gender?: ('male' | 'female' | 'non-binary') | undefined, characteristics?: Array<string> | undefined};

export type CreateApiPersonasGenerateImageArgs = {body: PersonaImageRequest};

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

export const personaImageResponse = z.object({name: z.string().optional(), image_url: z.string().optional(), generated_at: z.string().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
};

/**
 * Generate Persona Image
 * 
 * POST /personas/generate-image
 */
export const createApiPersonasGenerateImage = async (args: CreateApiPersonasGenerateImageArgs, options?: CreateApiPersonasGenerateImageOptions) => {
const {baseUrl = "https://speaking.meetingbaas.com", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (ApiKeyAuth !== undefined) headers.set("x-meeting-baas-api-key", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/personas/generate-image${query.size > 0 ? `?${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(personaImageResponse, await res.json())
};