import {z} from 'zod'

export type CreateApiCheckoutChargesArgs = {'api-key': string, 'x-business-id': string, body: {amount: number, reference: string, currency: 'NGN' | 'GHS' | 'KES' | 'ZAR' | 'UGX' | 'TZS' | 'ZMW' | 'XAF' | 'XOF', type: 'card' | 'bank_transfer' | 'mobile_money' | 'eft' | 'payattitude', customer: {name: string, email: string, phoneNumber?: string | undefined}, card?: {card_number: string, cvv: string, expiry_month: string, expiry_year: string} | undefined, phone?: string | undefined, description?: string | undefined, settlementDestination?: ('wallet' | 'bank_account') | undefined, callbackUrl?: string | undefined, operator?: ('MTN' | 'AIRTEL' | 'AIRTELTIGO' | 'MPESA' | 'TIGO') | undefined, quoteReference?: string | undefined, webhookUrl?: string | undefined}};

export type CreateApiCheckoutChargesOptions = {baseUrl?: string | undefined, sec0?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiCheckoutChargesResponse = z.object({status: z.boolean().optional(), message: z.string().optional(), data: z.object({id: z.number().int().optional(), authorization: z.object({mode: z.string().optional()}).optional(), auth_model: z.string().optional(), amount: z.number().int().optional(), currency: z.string().optional(), fee: z.number().int().optional(), message: z.string().optional(), status: z.string().optional(), reference: z.string().optional(), type: z.string().optional(), customer: z.object({name: z.string().optional(), email: z.string().optional(), phoneNumber: z.string().optional()}).optional(), settlementDestination: z.string().optional()}).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
};

/**
 * Initiate a charge
 * 
 * POST /checkout/charges
 */
export const createApiCheckoutCharges = async (args: CreateApiCheckoutChargesArgs, options?: CreateApiCheckoutChargesOptions) => {
const {baseUrl = "https://sandboxapi.fincra.com", fetch: fetchFn = fetch, sec0} = options ?? {}

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

if (args['api-key'] != null) headers.set("api-key", String(args['api-key']))
if (args['x-business-id'] != null) headers.set("x-business-id", String(args['x-business-id']))
if (sec0 !== undefined) headers.set("api-key", sec0)

const url = `${baseUrl.replace(/\/+$/, '')}/checkout/charges${query.size > 0 ? `?${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(createApiCheckoutChargesResponse, await res.json())
};