import {z} from 'zod'

export type Gateway = {gateway?: ({gateway_type: string, description?: string | undefined, merchant_profile_key?: string | undefined, sub_merchant_key?: string | undefined, sandbox?: boolean | undefined, mode?: string | undefined} | {[key: string]: string}) | undefined};

export type CreateApiGatewaysFormatArgs = {body: Gateway};

export type CreateApiGatewaysFormatOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const gatewaySpecificFields = z.array(z.string());

export const gatewayProperties = z.object({token: z.string().optional(), name: z.string().optional(), gateway_type: z.string().optional(), description: z.string().optional(), merchant_profile_key: z.string().optional(), sub_merchant_key: z.string().optional(), state: z.string().optional(), sandbox: z.boolean().optional(), redacted: z.boolean().optional(), credentials: z.array(z.unknown()).optional(), gateway_settings: z.object({}).optional(), characteristics: z.array(z.unknown()).optional(), payment_methods: z.array(z.unknown()).optional(), gateway_specific_fields: gatewaySpecificFields.optional(), mode: z.string().optional(), created_at: z.string().optional(), updated_at: z.string().optional()});

export const gatewayResponse = z.object({gateway: gatewayProperties.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
};

/**
 * Create a gateway
 * 
 * POST /gateways.{format}
 */
export const createApiGatewaysFormat = async (args: CreateApiGatewaysFormatArgs, options?: CreateApiGatewaysFormatOptions) => {
const {baseUrl = "https://core.spreedly.com/v1", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/gateways.${encodeURIComponent(String(args.format))}${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(gatewayResponse, await res.json())
};