import {z} from 'zod'

export type GetApiRegularTransactionsArgs = {accountId?: string | undefined};

export type GetApiRegularTransactionsOptions = {baseUrl?: string | undefined, Bearer?: string | undefined, fetch?: typeof fetch | undefined};

export const regularTransactions = z.object({seriesId: z.string(), accountId: z.string(), type: z.enum(["payment", "income"]), description: z.string().optional(), cleanedDescription: z.string(), counterpartyId: z.string().optional(), frequency: z.enum(["weekly", "fortnightly", "monthly", "quarterly", "yearly"]), numTxMatchedInSeries: z.number().int(), gapLengthInFreqUnits: z.number().int().optional(), dateAnomaliesCount: z.number().int().optional(), numReturnedTxs: z.number().int().optional(), lastDate: z.string(), predictedDate: z.string(), predictedDateEarliest: z.string().optional(), predictedDateLatest: z.string().optional(), predictedTxLateOrNotDetected: z.boolean().optional(), predictedAmount: z.object({value: z.number().int(), majorUnits: z.number().int().optional(), minorUnits: z.number().int().optional(), currency: z.string()}), predictedAmountLower: z.object({value: z.number().int(), majorUnits: z.number().int().optional(), minorUnits: z.number().int().optional(), currency: z.string()}).optional(), predictedAmountUpper: z.object({value: z.number().int(), majorUnits: z.number().int().optional(), minorUnits: z.number().int().optional(), currency: z.string()}).optional(), predictedCategoryId: z.string().optional(), transactions: z.array(z.string())});

export const links = z.object({next: z.string().optional(), prev: z.string().optional(), self: z.string()});

export const getApiRegularTransactionsResponse = z.object({data: z.array(regularTransactions).optional(), links: links.optional(), meta: z.object({}).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
};

/**
 * Retrieve regular transactions
 * 
 * GET /regular-transactions
 */
export const getApiRegularTransactions = async (args: GetApiRegularTransactionsArgs, options?: GetApiRegularTransactionsOptions) => {
const {baseUrl = "https://api.moneyhub.co.uk/v2.0", fetch: fetchFn = fetch, Bearer} = options ?? {}

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

if (args.accountId != null) query.append("accountId", String(args.accountId))
if (Bearer !== undefined) headers.set("Authorization", Bearer)

const url = `${baseUrl.replace(/\/+$/, '')}/regular-transactions${query.size > 0 ? `?${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(getApiRegularTransactionsResponse, await res.json())
};