import {z} from 'zod'

export type EntityType = 'CARD' | 'CARD_HIERARCHY_GROUP';

export type GetApiV1RuleSetsArgs = {auditUser: string, 'entity-id'?: string | undefined, 'entity-type'?: EntityType | undefined};

export type GetApiV1RuleSetsOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const id = z.string();

export const ruleSetOperatorType = z.enum(["ANY", "ALL"]);

export const ruleSetType = z.enum(["STANDARD", "STIP"]);

export const ruleType = z.enum(["DECLINE", "ALLOWED_MCC", "BLOCKED_MCC", "ALLOWED_MERCHANT_ID", "BLOCKED_MERCHANT_ID", "AMOUNT", "ALLOWED_MERCHANT_COUNTRY", "BLOCKED_MERCHANT_COUNTRY", "ALLOWED_CARD_ENTRY_MODES", "BLOCKED_CARD_ENTRY_MODES", "ALLOWED_CVM", "BLOCKED_CVM", "CARDHOLDER_PRESENT", "EXTERNAL_BALANCE_CHECK", "CUMULATIVE_AMOUNT_INDIVIDUAL_LIMITS", "CUMULATIVE_COUNT_INDIVIDUAL_LIMITS", "ENFUCE_INTERNAL_PSD2_PIN_COUNT_RULE", "ENFUCE_INTERNAL_PSD2_PIN_AMOUNT_RULE"]);

export const filterOperatorType = z.enum(["ANY", "ALL"]);

export const filterType = z.enum(["MCC", "AMOUNT", "MERCHANT_COUNTRY", "CARDHOLDER_VERIFICATION", "CARD_ENTRY_MODE", "CARDHOLDER_PRESENT", "ACQUIRER_ID", "TRANSACTION_TYPE"]);

export const filterResponseBody = z.object({id: id.optional(), type: filterType.optional(), reversed: z.boolean().optional()});

export const ruleResponseBody = z.object({id: id.optional(), ruleType: ruleType.optional(), name: z.string(), filterOperatorType: filterOperatorType, filters: z.array(filterResponseBody).optional()});

export const ruleSet = z.object({id: id.optional(), name: z.string().optional(), operatorType: ruleSetOperatorType.optional(), ruleSetType: ruleSetType.optional(), rules: z.array(ruleResponseBody).optional()});

export const getApiV1RuleSetsResponse = z.array(ruleSet);

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 Rule Sets
 * 
 * GET /v1/rule-sets
 */
export const getApiV1RuleSets = async (args: GetApiV1RuleSetsArgs, options: GetApiV1RuleSetsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.auditUser != null) query.append("auditUser", String(args.auditUser))
if (args['entity-id'] != null) query.append("entity-id", String(args['entity-id']))
if (args['entity-type'] != null) query.append("entity-type", String(args['entity-type']))

const url = `${baseUrl.replace(/\/+$/, '')}/v1/rule-sets${query.size > 0 ? `?${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(getApiV1RuleSetsResponse, await res.json())
};