import {z} from 'zod'

export type GetApiApiCouponsArgs = {isActive?: boolean | undefined, page?: number | undefined, limit?: number | undefined};

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

export const couponResponse = z.object({id: z.string(), code: z.string(), name: z.string(), description: z.string().optional(), discountType: z.enum(["PERCENTAGE", "FIXED_AMOUNT"]), discountValue: z.string(), currency: z.string().optional(), maxRedemptions: z.number().optional(), redemptionCount: z.number(), appliesToPlanIds: z.array(z.string()), isActive: z.boolean(), expiresAt: z.string().optional(), createdAt: z.string(), updatedAt: z.string()});

export const paginationMeta = z.object({total: z.number(), page: z.number(), limit: z.number(), totalPages: z.number()});

export const paginatedCouponResponse = z.object({data: z.array(couponResponse), meta: paginationMeta});

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
};

/**
 * List coupons
 * 
 * GET /api/coupons
 */
export const getApiApiCoupons = async (args: GetApiApiCouponsArgs, options?: GetApiApiCouponsOptions) => {
const {baseUrl = "https://api.novabilling.one", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.isActive != null) query.append("isActive", String(args.isActive))
if (args.page != null) query.append("page", String(args.page))
if (args.limit != null) query.append("limit", String(args.limit))
if (apiKey !== undefined) headers.set("Authorization", apiKey)

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

const res = await fetchFn(url, {method: "GET", headers})

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

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