import {z} from 'zod'

export type ScheduleAnnotation = {merchant_uid: string, schedule_at: number, currency: string, amount: number, tax_free?: number | undefined, vat_amount?: number | undefined, name: string, buyer_name?: string | undefined, buyer_email?: string | undefined, buyer_tel?: string | undefined, buyer_addr?: string | undefined, buyer_postcode?: string | undefined, custom_data?: string | undefined, notice_url?: string | undefined, product_type?: string | undefined, cash_receipt_type?: string | undefined, card_quota?: number | undefined, interest_free_by_merchant?: boolean | undefined, use_card_point?: boolean | undefined, product_count?: number | undefined, browser_ip?: string | undefined, extra?: ({naverUseCfm?: string | undefined}) | undefined, bypass?: string | undefined, promotion_id?: string | undefined};

export type CreateApiSubscribePaymentsScheduleArgs = {body: {customer_uid: string, customer_id?: string | undefined, checking_amount?: number | undefined, card_number?: string | undefined, expiry?: string | undefined, birth?: string | undefined, pwd_2digit?: string | undefined, cvc?: string | undefined, channel_key?: string | undefined, schedules: Array<ScheduleAnnotation>}};

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

export const scheduleResultAnnotation = z.object({customer_uid: z.string().optional(), merchant_uid: z.string().max(40).optional(), imp_uid: z.string().max(32).optional(), pg_provider: z.string().max(16).optional(), pg_id: z.string().max(64).optional(), customer_id: z.string().optional(), schedule_at: z.number().int().optional(), executed_at: z.number().int().optional(), revoked_at: z.number().int().optional(), amount: z.number().optional(), currency: z.string().optional(), name: z.string().max(40).optional(), buyer_name: z.string().max(16).optional(), buyer_email: z.string().max(64).optional(), buyer_tel: z.string().max(16).optional(), buyer_addr: z.string().max(128).optional(), buyer_postcode: z.string().max(8).optional(), custom_data: z.string().optional(), schedule_status: z.string().optional(), payment_status: z.string().optional(), fail_reason: z.string().optional(), promotion_id: z.string().optional()});

export const scheduleResponse = z.object({code: z.number().int().optional(), message: z.string().optional(), response: z.array(scheduleResultAnnotation).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
};

/**
 * 결제 예약 API
 * 
 * POST /subscribe/payments/schedule
 */
export const createApiSubscribePaymentsSchedule = async (args: CreateApiSubscribePaymentsScheduleArgs, options?: CreateApiSubscribePaymentsScheduleOptions) => {
const {baseUrl = "https://api.iamport.kr", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/subscribe/payments/schedule${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: new URLSearchParams(Object.entries(args.body).flatMap(([key, value]) => (value == null ? [] : [[key, String(value)]])))})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(scheduleResponse, await res.json())
};