import {z} from 'zod'

export type ExpressTheme = {logo?: string | undefined, primary?: string | undefined, secondary?: string | undefined, accent?: string | undefined};

export type CreateExpressSessionExistingCustomerRequest = {customerReference: string, theme?: ExpressTheme | undefined};

export type CreateExpressSessionNewCustomerRequest = {type: 'INDIVIDUAL' | 'COMPANY', countryCode: string, externalCustomerReference: string, theme?: ExpressTheme | undefined};

export type CreateApiPlatformV1WalletSessionsArgs = {body: CreateExpressSessionExistingCustomerRequest | CreateExpressSessionNewCustomerRequest};

export type CreateApiPlatformV1WalletSessionsOptions = {baseUrl?: string | undefined, Hawk?: string | undefined, fetch?: typeof fetch | undefined};

export const expressTheme = z.object({logo: z.string().optional(), primary: z.string().optional(), secondary: z.string().optional(), accent: z.string().optional()});

export const expressSessionResponse = z.object({externalCustomerReference: z.string().optional(), customerReference: z.string().optional(), customerType: z.enum(["INDIVIDUAL", "COMPANY"]).optional(), useCase: z.enum(["STABLECOIN_PAYOUTS", "EMBEDDED_STABLECOIN_WALLETS", "EMBEDDED_FIAT_ACCOUNTS"]).optional(), countryCode: z.string().max(2).optional(), theme: expressTheme.optional(), walletSessionUrl: z.string()});

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
};

/**
 * Create express session
 * 
 * POST /platform/v1/wallet-sessions
 */
export const createApiPlatformV1WalletSessions = async (args: CreateApiPlatformV1WalletSessionsArgs, options?: CreateApiPlatformV1WalletSessionsOptions) => {
const {baseUrl = "https://api.sandbox.bvnk.com", fetch: fetchFn = fetch, Hawk} = options ?? {}

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

if (Hawk !== undefined) headers.set("Authorization", Hawk)

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