import {z} from 'zod'

export type EmbeddedCustomer = {email?: string | undefined, name?: string | undefined, surname?: string | undefined, phone?: string | undefined, address?: string | undefined, postal_code?: string | undefined, city?: string | undefined, country?: string | undefined, identity_number?: string | undefined, ip_address?: string | undefined, customer_id?: string | undefined};

export type EmbeddedBasketItem = {id: string, name: string, brand_name?: string | undefined, qty?: number | undefined, unit_price?: number | undefined, category?: number | undefined};

export type EmbeddedSessionRequest = {merchant_api_key: string, amount: number, currency?: string | undefined, language?: string | undefined, customer?: EmbeddedCustomer | undefined, basket_items?: Array<EmbeddedBasketItem> | undefined, customer_basket?: Array<Record<string, never>> | undefined, submerchant_external_id?: string | undefined, is_submerchant_payment?: boolean | undefined, campaign_name?: string | undefined, billing_tax_office?: string | undefined, billing_tax_number?: string | undefined, success_url?: string | undefined, fail_url?: string | undefined, metadata?: Record<string, never> | undefined, execution_mode?: string | undefined, sandbox_scenario?: string | undefined};

export type CreateApiApiV1EmbeddedSessionArgs = {body: EmbeddedSessionRequest};

export type CreateApiApiV1EmbeddedSessionOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const embeddedSessionResponse = z.object({status: z.number().int(), message: z.string(), session_id: z.string().optional(), checkout_url: z.string().optional(), expires_at: 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 Session
 * 
 * POST /api/v1/embedded/session
 */
export const createApiApiV1EmbeddedSession = async (args: CreateApiApiV1EmbeddedSessionArgs, options?: CreateApiApiV1EmbeddedSessionOptions) => {
const {baseUrl = "https://api.paylox.io", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/embedded/session${query.size > 0 ? `?${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(embeddedSessionResponse, await res.json())
};