import {z} from 'zod'

export type SimpleFiatAmount = {fiatAmount: number, fiatCurrencyCode: 'USD' | 'COP' | 'ARS' | 'EUR' | 'MXN' | 'BRL' | 'CLP' | 'PEN' | 'BOB' | 'CRC' | 'ZAR'};

export type TokenWithBlockchain = {blockchain: 'ETHEREUM' | 'POLYGON' | 'BASE' | 'CELO' | 'PLASMA' | 'TRON', symbol: 'USDC' | 'USDT'};

export type GetPayinExchangeRateRequest = {amount: SimpleFiatAmount, destinationToken: TokenWithBlockchain};

export type CreateApiApiPayinsExchangeRateArgs = {body: GetPayinExchangeRateRequest};

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

export const tokenWithBlockchain = z.object({blockchain: z.enum(["ETHEREUM", "POLYGON", "BASE", "CELO", "PLASMA", "TRON"]), symbol: z.enum(["USDC", "USDT"])});

export const payinExchangeRate = z.object({destinationToken: tokenWithBlockchain, exchangeRate: z.number(), sourceCurrency: z.enum(["USD", "COP", "ARS", "EUR", "MXN", "BRL", "CLP", "PEN", "BOB", "CRC", "ZAR"])});

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 exchange rate for payin
 * 
 * POST /api/payins/exchange-rate
 */
export const createApiApiPayinsExchangeRate = async (args: CreateApiApiPayinsExchangeRateArgs, options?: CreateApiApiPayinsExchangeRateOptions) => {
const {baseUrl = "https://api.muralpay.com", fetch: fetchFn = fetch, bearer} = options ?? {}

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

if (bearer !== undefined) headers.set('authorization', `Bearer ${bearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/payins/exchange-rate${query.size > 0 ? `?${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(payinExchangeRate, await res.json())
};