import {z} from 'zod'

export type GetApiSocialMediaChannelMetricsArgs = {channel_id: string, date_from: string, date_to?: string | undefined, output?: ('json' | 'csv' | 'xml' | 'php') | undefined};

export type GetApiSocialMediaChannelMetricsOptions = {baseUrl?: string | undefined, http?: string | undefined, fetch?: typeof fetch | undefined};

export const socialMediaChannelMetrics = z.object({metrics: z.array(z.object({follower_count: z.number().int().optional(), retrieved_at: z.string().optional()})).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
};

/**
 * Channel metrics
 * 
 * GET /social-media/channel-metrics
 */
export const getApiSocialMediaChannelMetrics = async (args: GetApiSocialMediaChannelMetricsArgs, options?: GetApiSocialMediaChannelMetricsOptions) => {
const {baseUrl = "https://api.ahrefs.com/v3", fetch: fetchFn = fetch, http} = options ?? {}

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

if (args.channel_id != null) query.append("channel_id", String(args.channel_id))
if (args.date_from != null) query.append("date_from", String(args.date_from))
if (args.date_to != null) query.append("date_to", String(args.date_to))
if (args.output != null) query.append("output", String(args.output))
if (http !== undefined) headers.set('authorization', `Bearer ${http}`)

const url = `${baseUrl.replace(/\/+$/, '')}/social-media/channel-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(socialMediaChannelMetrics, await res.json())
};