import {z} from 'zod'

export type CreateApiWebstoreCheckoutArgs = {'x-store-domain': string, body: {gateway: 'PIX' | 'MERCADOPAGO' | 'STRIPE' | 'PAYPAL' | 'PICPAY' | 'PAGSEGURO' | 'PAGARME' | 'OTHER', client_email: string, client_name: string, client_phone?: string | undefined, client_document?: string | undefined, client_discord?: string | undefined, terms: boolean, fields?: {[key: string]: unknown} | undefined, cart?: (Array<{package_id: number, quantity: number, options?: {[key: string]: unknown} | undefined, fields?: {[key: string]: unknown} | undefined}>) | undefined, coupon?: string | undefined}};

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

export const createApiWebstoreCheckoutResponse = z.union([z.object({checkout_url: z.string().optional()}), z.object({pix_code: z.string().optional(), qr_code: z.string().optional(), return_url: z.string().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 Webstore Checkout
 * 
 * POST /webstore/checkout
 */
export const createApiWebstoreCheckout = async (args: CreateApiWebstoreCheckoutArgs, options?: CreateApiWebstoreCheckoutOptions) => {
const {baseUrl = "https://api.centralcart.io/v1", fetch: fetchFn = fetch} = options ?? {}

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

if (args['x-store-domain'] != null) headers.set("x-store-domain", String(args['x-store-domain']))

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