import {z} from 'zod'

export type GetApiAnalyticsLtvArgs = {cohort_from?: number | undefined, cohort_to?: number | undefined, mode?: ('by_days' | 'by_renewals') | undefined, environment?: (0 | 1) | undefined, segment?: string | undefined, revenue_type?: ('gross' | 'net') | undefined, currency?: string | undefined, 'filter[<attribute>][]'?: Array<string> | undefined};

export type GetApiAnalyticsLtvOptions = {baseUrl?: string | undefined, secretAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const v4AnalyticsSeriesDataPoint = z.object({start_time: z.number().int(), value: z.number()});

export const v4AnalyticsLtv = z.object({object: z.literal("analytics_ltv"), url: z.string(), mode: z.enum(["by_days", "by_renewals"]), cohort_from: z.number().int(), cohort_to: z.number().int(), cohort_users: z.number().int(), paying_users: z.number().int(), revenue_type: z.enum(["gross", "net"]), currency: z.string(), measure: z.literal("usd"), segment: z.string().nullable().optional(), segments: z.array(z.record(z.string(), z.unknown())).optional(), series: z.array(v4AnalyticsSeriesDataPoint)});

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 LTV analytics data
 * 
 * GET /analytics/ltv
 */
export const getApiAnalyticsLtv = async (args: GetApiAnalyticsLtvArgs, options?: GetApiAnalyticsLtvOptions) => {
const {baseUrl = "https://api.qonversion.io/v4", fetch: fetchFn = fetch, secretAuth} = options ?? {}

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

if (args.cohort_from != null) query.append("cohort_from", String(args.cohort_from))
if (args.cohort_to != null) query.append("cohort_to", String(args.cohort_to))
if (args.mode != null) query.append("mode", String(args.mode))
if (args.environment != null) query.append("environment", String(args.environment))
if (args.segment != null) query.append("segment", String(args.segment))
if (args.revenue_type != null) query.append("revenue_type", String(args.revenue_type))
if (args.currency != null) query.append("currency", String(args.currency))
for (const item of args['filter[<attribute>][]'] ?? []) query.append("filter[<attribute>][]", String(item))
if (secretAuth !== undefined) headers.set('authorization', `Bearer ${secretAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/analytics/ltv${query.size > 0 ? `?${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(v4AnalyticsLtv, await res.json())
};