import {z} from 'zod'

export type GetApiBrandIdSitemapPagesPageIdMetricsArgs = {brand_id: number, page_id: number, start_date?: (string | null) | undefined, end_date?: (string | null) | undefined};

export type GetApiBrandIdSitemapPagesPageIdMetricsOptions = {baseUrl?: string | undefined, HTTPBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const sitemapMetricRow = z.object({date: z.string(), count_by_platform: z.record(z.string(), z.number().int())});

export const sitemapUrlMetrics = z.object({citations: z.array(sitemapMetricRow), ai_referrals: z.array(sitemapMetricRow), agent_traffic: z.array(sitemapMetricRow)});

export const sitemapPageMetricsResponse = z.object({granularity: z.enum(["daily", "weekly"]), metrics: sitemapUrlMetrics});

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 Sitemap Page Metrics
 * 
 * GET /{brand_id}/sitemap/pages/{page_id}/metrics
 */
export const getApiBrandIdSitemapPagesPageIdMetrics = async (args: GetApiBrandIdSitemapPagesPageIdMetricsArgs, options?: GetApiBrandIdSitemapPagesPageIdMetricsOptions) => {
const {baseUrl = "https://api.scrunchai.com/v1", fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (args.start_date != null) query.append("start_date", String(args.start_date))
if (args.end_date != null) query.append("end_date", String(args.end_date))
if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/${encodeURIComponent(String(args.brand_id))}/sitemap/pages/${encodeURIComponent(String(args.page_id))}/metrics${query.size > 0 ? `?${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(sitemapPageMetricsResponse, await res.json())
};