import {z} from 'zod'

export type CreateApiV1ScanDeepArgs = {'Idempotency-Key'?: string | undefined, body: {url?: string | undefined, keyword: string, region?: ('US' | 'CA' | 'UK' | 'AU' | 'NZ' | 'ES' | 'DE' | 'IT' | 'FR' | 'IE' | 'NL' | 'CH' | 'SE' | 'NO' | 'DK' | 'FI' | 'ZA' | 'MX' | 'BR' | 'CO' | 'IN' | 'SG' | 'MY' | 'JP' | 'KE' | 'AE' | 'HK') | undefined, market?: ('US' | 'CA' | 'UK' | 'AU' | 'NZ' | 'ES' | 'DE' | 'IT' | 'FR' | 'IE' | 'NL' | 'CH' | 'SE' | 'NO' | 'DK' | 'FI' | 'ZA' | 'MX' | 'BR' | 'CO' | 'IN' | 'SG' | 'MY' | 'JP' | 'KE' | 'AE' | 'HK') | undefined, locale?: string | undefined, compatibility_mode?: boolean | undefined, webhook?: ({url: string, events?: Array<string> | undefined}) | undefined, callbackMetadata?: {[key: string]: unknown} | undefined}};

export type CreateApiV1ScanDeepOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const acceptedJobResponse = z.object({jobId: z.string(), poweredBy: z.literal("On-Page.ai"), status: z.literal("queued"), request_id: z.string(), estimated: z.object({queue_position: z.number().int().gte(0)}).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
};

/**
 * Deep SEO scan (heavier analysis path) for a URL + keyword.
 * 
 * POST /v1/scan/deep
 */
export const createApiV1ScanDeep = async (args: CreateApiV1ScanDeepArgs, options?: CreateApiV1ScanDeepOptions) => {
const {baseUrl = "https://api.on-page.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 (args['Idempotency-Key'] != null) headers.set("Idempotency-Key", String(args['Idempotency-Key']))
if (apiKey !== undefined) headers.set('authorization', `Bearer ${apiKey}`)

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