import {z} from 'zod'

export type GetApiAgenciesInsightsOverviewArgs = {'X-Fanvue-API-Version': string, startDate: string, endDate: string, creatorUuids?: Array<string> | undefined};

export type GetApiAgenciesInsightsOverviewOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiAgenciesInsightsOverviewResponse = z.object({totalEarnings: z.object({gross: z.number().int(), net: z.number().int(), currency: z.literal("USD")}), newFans: z.number().int(), arpu: z.object({grossArpu: z.number(), netArpu: z.number(), grossSpend: z.number().int(), netSpend: z.number().int(), fanCount: z.number().int(), currency: z.literal("USD")}), retention: z.object({retentionRate: z.number(), cohortFanCount: z.number().int(), retainedFanCount: z.number().int(), revenueRetentionRate: z.number(), cohortGrossRevenue: z.number().int(), retainedGrossRevenue: z.number().int()}), averageFanLifetime: z.object({activeAvgDays: z.number(), activeFanCount: z.number().int(), churnedAvgDays: z.number(), churnedFanCount: z.number().int()})});

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 agency insights headline metrics
 * 
 * GET /agencies/insights/overview
 */
export const getApiAgenciesInsightsOverview = async (args: GetApiAgenciesInsightsOverviewArgs, options?: GetApiAgenciesInsightsOverviewOptions) => {
const {baseUrl = "https://api.fanvue.com", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args['X-Fanvue-API-Version'] != null) headers.set("X-Fanvue-API-Version", String(args['X-Fanvue-API-Version']))
if (args.startDate != null) query.append("startDate", String(args.startDate))
if (args.endDate != null) query.append("endDate", String(args.endDate))
if (args.creatorUuids != null) query.append("creatorUuids", args.creatorUuids.join(','))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/agencies/insights/overview${query.size > 0 ? `?${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(getApiAgenciesInsightsOverviewResponse, await res.json())
};