import {z} from 'zod'

export type V4GrantEntitlementRequest = {entitlement_id: string, expires_at?: number | undefined};

export type CreateApiUsersUserIdEntitlementsArgs = {user_id: string, body: V4GrantEntitlementRequest};

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

export const v4UserEntitlementSubscription = z.object({renew_state: z.enum(["will_renew", "canceled", "billing_issue"]), current_period_type: z.enum(["normal", "trial", "intro"])});

export const v4UserEntitlementProduct = z.object({product_id: z.string(), subscription: v4UserEntitlementSubscription.optional()});

export const v4UserEntitlement = z.object({object: z.literal("user_entitlement"), id: z.string(), url: z.string(), is_active: z.boolean(), source: z.string(), started_at: z.string().nullable().optional(), expires_at: z.string().nullable().optional(), product: v4UserEntitlementProduct.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
};

/**
 * Grant an entitlement to a user
 * 
 * POST /users/{user_id}/entitlements
 */
export const createApiUsersUserIdEntitlements = async (args: CreateApiUsersUserIdEntitlementsArgs, options?: CreateApiUsersUserIdEntitlementsOptions) => {
const {baseUrl = "https://api.qonversion.io/v4", fetch: fetchFn = fetch, secretAuth} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/users/${encodeURIComponent(String(args.user_id))}/entitlements${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(v4UserEntitlement, await res.json())
};