import {z} from 'zod'

export type ImageGenerateRequest = {prompt: string, aspect_ratio?: string | undefined, image_size?: string | undefined, reference_image_url?: (string | null) | undefined, skip_default_style?: boolean | undefined};

export type CreateApiV1ImagesGenerateArgs = {body: ImageGenerateRequest};

export type CreateApiV1ImagesGenerateOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const unifiedError = z.object({type: z.string(), title: z.string(), status: z.number().int(), detail: z.string().nullable().optional(), is_retriable: z.boolean().optional(), retry_after_seconds: z.number().int().nullable().optional(), alternative_action: z.string().nullable().optional(), error_category: z.string().optional(), caller_error: z.string().nullable().optional()});

export const unifiedMetadata = z.object({provider_used: z.string().nullable().optional(), providers_tried: z.array(z.string()).optional(), mode_used: z.string().nullable().optional(), response_time_ms: z.number().int().optional(), request_id: z.string().optional(), capability: z.string().nullable().optional(), params: z.record(z.string(), z.unknown()).nullable().optional()});

export const unifiedResponse = z.object({success: z.boolean(), data: z.union([z.record(z.string(), z.unknown()), z.array(z.unknown())]).nullable().optional(), error: unifiedError.nullable().optional(), metadata: unifiedMetadata.optional(), credits_used: z.number().int().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
};

/**
 * Image Generation
 * 
 * POST /v1/images/generate
 */
export const createApiV1ImagesGenerate = async (args: CreateApiV1ImagesGenerateArgs, options?: CreateApiV1ImagesGenerateOptions) => {
const {baseUrl = "https://suprsonic.ai", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (apiKey !== undefined) headers.set('authorization', `Bearer ${apiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/images/generate${query.size > 0 ? `?${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(unifiedResponse, await res.json())
};