import {z} from 'zod'

export type GetApiAnalyticsCohortsArgs = {cohort_from?: number | undefined, cohort_to?: number | undefined, mode?: ('by_renewals' | 'by_days') | undefined, grouping?: ('day' | 'week' | 'month' | 'quarter' | 'year') | undefined, environment?: (0 | 1) | undefined, cohort_definition?: ('new_customers' | 'initial_conversions' | 'new_paying') | undefined, revenue_type?: ('gross' | 'net') | undefined, currency?: string | undefined, group_by?: string | undefined, 'filter[<attribute>][]'?: Array<string> | undefined};

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

export const v4AnalyticsCohorts = z.object({object: z.literal("analytics_cohorts"), url: z.string(), mode: z.enum(["by_renewals", "by_days"]), grouping: z.enum(["day", "week", "month", "quarter", "year"]), cohort_from: z.number().int(), cohort_to: z.number().int(), currency: z.string(), period_labels: z.array(z.string()), cohorts: z.array(z.record(z.string(), z.unknown())), total: z.record(z.string(), z.unknown()).nullable().optional(), max_values: z.record(z.string(), z.number()), group_by: z.string().optional(), segments: z.array(z.record(z.string(), z.unknown())).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
};

/**
 * Get cohort analytics data
 * 
 * GET /analytics/cohorts
 */
export const getApiAnalyticsCohorts = async (args: GetApiAnalyticsCohortsArgs, options?: GetApiAnalyticsCohortsOptions) => {
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.grouping != null) query.append("grouping", String(args.grouping))
if (args.environment != null) query.append("environment", String(args.environment))
if (args.cohort_definition != null) query.append("cohort_definition", String(args.cohort_definition))
if (args.revenue_type != null) query.append("revenue_type", String(args.revenue_type))
if (args.currency != null) query.append("currency", String(args.currency))
if (args.group_by != null) query.append("group_by", String(args.group_by))
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/cohorts${query.size > 0 ? `?${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(v4AnalyticsCohorts, await res.json())
};