import {z} from 'zod'

export type CreateApiV102FloaSimulateArgs = {body: {payment: {value: number, currency: string}, countryCode: 'PT' | 'ES' | 'FR'}};

export type CreateApiV102FloaSimulateOptions = {baseUrl?: string | undefined, sec0?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiV102FloaSimulateResponse = z.object({transactionStatus: z.string().optional(), installmentOptions: z.array(z.object({productName: z.string().optional(), productCode: z.string().optional(), countryCode: z.string().optional(), installmentCount: z.number().int().optional(), customerFees: z.string().optional(), customerTotalAmount: z.string().optional(), merchantFinancedAmount: z.string().optional(), merchantFees: z.string().optional(), merchantServiceFees: z.string().optional(), merchantTotalAmount: z.string().optional(), simulatedInstallments: z.array(z.object({rank: z.number().int().optional(), date: z.string().optional(), amount: z.string().optional()})).optional(), currency: 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
};

/**
 * Floa Pay - Simulation
 * 
 * POST /v1.02/floa/simulate
 */
export const createApiV102FloaSimulate = async (args: CreateApiV102FloaSimulateArgs, options?: CreateApiV102FloaSimulateOptions) => {
const {baseUrl = "https://sandbox.eupago.pt/api", 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 (sec0 !== undefined) headers.set("Authorization", sec0)

const url = `${baseUrl.replace(/\/+$/, '')}/v1.02/floa/simulate${query.size > 0 ? `?${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(createApiV102FloaSimulateResponse, await res.json())
};