import {z} from 'zod'

export type PrivilegeValueType = 'STRING' | 'BOOLEAN' | 'INTEGER' | 'SELECT';

export type PrivilegeConfig = {select_options?: Array<string> | undefined};

export type FeaturePrivilegeBase = {code: string, name?: string | undefined, value_type?: PrivilegeValueType | undefined, config?: PrivilegeConfig | undefined};

export type FeatureRequest = {code: string, name?: string | undefined, description?: string | undefined, privileges?: Array<FeaturePrivilegeBase> | undefined};

export type CreateApiFeaturesArgs = {body: FeatureRequest};

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

export const privilegeValueType = z.enum(["STRING", "BOOLEAN", "INTEGER", "SELECT"]);

export const privilegeConfig = z.object({select_options: z.array(z.string()).optional()});

export const featurePrivilegeBase = z.object({code: z.string().max(255), name: z.string().max(255).optional(), value_type: privilegeValueType.optional(), config: privilegeConfig.optional()});

export const dateTimeWithZone = z.string();

export const featureResponse = z.object({code: z.string().max(255), name: z.string().max(255).optional(), description: z.string().max(600).optional(), privileges: z.array(featurePrivilegeBase).optional(), created_at: dateTimeWithZone});

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
};

/**
 * Create a feature
 * 
 * POST /features
 */
export const createApiFeatures = async (args: CreateApiFeaturesArgs, options?: CreateApiFeaturesOptions) => {
const {baseUrl = "https://api-m.sandbox.paypal.com", 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 = `${baseUrl.replace(/\/+$/, '')}/features${query.size > 0 ? `?${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(featureResponse, await res.json())
};