import {z} from 'zod'

export type Status = 'ACTIVE' | 'COMMITTED';

export type Breakdown = 'ARR' | 'MRR';

export type PageLimit = number;

export type PageCursor = string;

export type GetApiReportsArrWaterfallArgs = {month: unknown, status: Status, breakdown: Breakdown, subsidiary_id?: string | undefined, limit?: PageLimit | undefined, cursor?: PageCursor | undefined};

export type GetApiReportsArrWaterfallOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const currencyCode = z.string();

export const roundedMonetaryAmount = z.object({amount: z.string(), currency: currencyCode});

export const revenue = z.object({year_month: z.string(), amount: roundedMonetaryAmount});

export const customerRevenue = z.object({id: z.string(), name: z.string(), total: revenue.optional()});

export const pageCursor = z.string();

export const pagination = z.object({next_cursor: pageCursor.optional()});

export const revenueWaterfall = z.object({customers: z.array(customerRevenue), pagination: pagination.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
};

/**
 * Retrieves ARR waterfall report
 * 
 * GET /reports/arr-waterfall
 */
export const getApiReportsArrWaterfall = async (args: GetApiReportsArrWaterfallArgs, options?: GetApiReportsArrWaterfallOptions) => {
const {baseUrl = "https://api.rillet.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.month != null) query.append("month", String(args.month))
if (args.status != null) query.append("status", String(args.status))
if (args.breakdown != null) query.append("breakdown", String(args.breakdown))
if (args.subsidiary_id != null) query.append("subsidiary_id", String(args.subsidiary_id))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/reports/arr-waterfall${query.size > 0 ? `?${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(revenueWaterfall, await res.json())
};