import {z} from 'zod'

export type Customer = {merchantAssignedCustomerId?: string | undefined, firstName?: string | undefined, lastName?: string | undefined, emailId?: string | undefined, callingCode?: string | undefined, mobileNumber?: string | undefined};

export type Shipping = {firstName?: string | undefined, lastName?: string | undefined, emailId?: string | undefined, addressStreet1?: string | undefined, addressStreet2?: string | undefined, addressCity?: string | undefined, addressState?: string | undefined, addressPostalCode?: string | undefined, addressCountry?: string | undefined};

export type RiskItem = {itemId?: string | undefined, itemName?: string | undefined, itemQuantity?: number | undefined, itemPrice?: string | undefined, itemCategory?: string | undefined};

export type Risk = {customerData?: Customer | undefined, shippingData?: Shipping | undefined, orderData?: Array<RiskItem> | undefined};

export type Billing = {firstName?: string | undefined, lastName?: string | undefined, emailId?: string | undefined, callingCode?: string | undefined, phoneNumber?: string | undefined, addressStreet1?: string | undefined, addressStreet2?: string | undefined, addressCity?: string | undefined, addressState?: string | undefined, addressStateCode?: string | undefined, addressPostalCode?: string | undefined, addressCountry?: string | undefined};

export type PaymentPayCollectInitiateHostedSI = {totalAmount: string, txnCurrency: string, billingData?: Billing | undefined};

export type SIDataOnDemand = {maxAmount: string, amount: string, numberOfPayments: string, frequency: 'ONDEMAND' | 'WEEKLY' | 'BIWEEKLY' | 'MONTHLY' | 'QUARTERLY' | 'HALFYEARLY' | 'YEARLY', type: 'FIXED' | 'VARIABLE'};

export type StandingInstructionOnDemand = {data: SIDataOnDemand};

export type TransactionRequestPayCollectSIOnDemand = {merchantTxnId: string, merchantUniqueId?: string | undefined, riskData?: Risk | undefined, merchantCallbackURL: string, paymentData: PaymentPayCollectInitiateHostedSI, standingInstruction: StandingInstructionOnDemand};

export type CreateApiGlV1PaymentsInitiatePaycollectArgs = {body: TransactionRequestPayCollectSIOnDemand};

export type CreateApiGlV1PaymentsInitiatePaycollectOptions = {baseUrl?: string | undefined, JwsTokenAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const initiateResponseDataPayCollectSI = z.object({redirectUrl: z.string().optional(), statusUrl: z.string().optional(), merchantTxnId: z.string().optional(), mandateId: z.string().optional()});

export const apiResponsePayCollectInitiateSI = z.object({gid: z.string().optional(), status: z.string().optional(), message: z.string().optional(), timestamp: z.string().optional(), reasonCode: z.string().optional(), data: initiateResponseDataPayCollectSI.optional(), errors: z.record(z.string(), z.string()).nullable().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
};

/**
 * PayCollect on-demand SI — register mandate (request body)
 * 
 * POST /gl/v1/payments/initiate/paycollect
 */
export const createApiGlV1PaymentsInitiatePaycollect = async (args: CreateApiGlV1PaymentsInitiatePaycollectArgs, options?: CreateApiGlV1PaymentsInitiatePaycollectOptions) => {
const {baseUrl = "https://api.onboard.payglocal.in", fetch: fetchFn = fetch, JwsTokenAuth} = options ?? {}

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

if (JwsTokenAuth !== undefined) headers.set("x-gl-token-external", JwsTokenAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/gl/v1/payments/initiate/paycollect${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(apiResponsePayCollectInitiateSI, await res.json())
};