import {z} from 'zod'

export type ApplyCommerceDiscountRequest = {discount_id: string};

export type CreateApiBillingSubscriptionItemsSubscriptionItemIdDiscountsArgs = {subscription_item_id: string, body: ApplyCommerceDiscountRequest};

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

export const commerceMoneyResponse = z.object({amount: z.number().int(), amount_formatted: z.string(), currency: z.string(), currency_symbol: z.string()});

export const commerceDiscountRedemptionResponse = z.object({object: z.literal("commerce_discount_redemption"), id: z.string(), subscription_item_id: z.string(), discount_id: z.string(), name: z.string().optional(), source: z.enum(["promotion", "manual", "promo_code"]), promo_code: z.string().optional(), effect: z.enum(["percentage", "fixed_amount"]).optional(), percent_off: z.number().nullable().optional(), amount_off: commerceMoneyResponse.nullable().optional(), amount: commerceMoneyResponse.nullable().optional(), cycles_remaining: z.number().int().nullable(), cycles_applied: z.number().int(), status: z.enum(["active", "exhausted", "removed"]).optional(), redeemed_at: z.number().int(), redeemed_by: z.string().nullable()});

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
};

/**
 * Apply a discount to a subscription item
 * 
 * POST /billing/subscription_items/{subscription_item_id}/discounts
 */
export const createApiBillingSubscriptionItemsSubscriptionItemIdDiscounts = async (args: CreateApiBillingSubscriptionItemsSubscriptionItemIdDiscountsArgs, options?: CreateApiBillingSubscriptionItemsSubscriptionItemIdDiscountsOptions) => {
const {baseUrl = "https://api.clerk.com/v1", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/billing/subscription_items/${encodeURIComponent(String(args.subscription_item_id))}/discounts${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(commerceDiscountRedemptionResponse, await res.json())
};