import {z} from 'zod'

export type UUID = string;

export type Amount = number;

export type Currency = 'JPY' | 'USD' | 'EUR' | 'TWD' | 'KRW' | 'PLN' | 'GBP' | 'HKD' | 'SGD' | 'NZD' | 'AUD' | 'IDR' | 'MYR' | 'PHP' | 'THB' | 'CNY' | 'BRL' | 'CHF' | 'CAD' | 'VND';

export type SubscriptionPeriod = 'weekly' | 'monthly' | 'yearly';

export type CreateSubscriptionRequest = {customer: UUID, amount: Amount, currency: Currency, period: SubscriptionPeriod, metadata?: Record<string, never> | undefined};

export type CreateApiSubscriptionsArgs = {body: CreateSubscriptionRequest};

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

export const uUID = z.string().min(25).max(25);

export const amount = z.number().int().gte(0);

export const currency = z.enum(["JPY", "USD", "EUR", "TWD", "KRW", "PLN", "GBP", "HKD", "SGD", "NZD", "AUD", "IDR", "MYR", "PHP", "THB", "CNY", "BRL", "CHF", "CAD", "VND"]);

export const locale = z.enum(["ja", "en", "ko"]);

export const subscriptionPeriod = z.enum(["weekly", "monthly", "yearly"]);

export const subscription = z.object({id: uUID, resource: z.literal("subscription"), status: z.string(), amount: amount, currency: currency, customer: z.object({id: z.number().int(), uuid: uUID, merchant_id: z.number().int(), created_at: z.string(), updated_at: z.string(), email: z.string().nullable(), currency: currency, locale: locale, name: z.string().nullable(), phone: z.string().nullable(), archived_at: z.string().nullable()}), period: subscriptionPeriod, day: z.number().int(), payment_details: z.object({type: z.string(), month: z.string(), year: z.string(), email: z.string()}), retry_count: z.number().int(), retry_at: z.string().nullable(), next_capture_at: z.string(), created_at: z.string(), ended_at: z.string().nullable(), metadata: z.object({}), payments: z.array(uUID)});

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
};

/**
 * Subscription: Create
 * 
 * POST /subscriptions
 */
export const createApiSubscriptions = async (args: CreateApiSubscriptionsArgs, options?: CreateApiSubscriptionsOptions) => {
const {baseUrl = "https://komoju.com/api/v1", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

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

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