import {z} from 'zod'

export type BasicAuthAuthentication = {type: 'basic_auth', data?: ({username: string, password?: string | undefined}) | undefined};

export type BearerTokenAuthentication = {type: 'bearer_token', data?: ({token?: string | undefined}) | undefined};

export type ApiKeyAuthentication = {type: 'api_key', data?: ({name: string, value?: string | undefined}) | undefined, add_position: 'header' | 'query_string'};

export type WebhookTestRequest = {webhook: {endpoint: string, http_method?: ('GET' | 'POST' | 'PUT' | 'PATCH' | 'DELETE') | undefined, request_format?: ('json' | 'xml' | 'form_encoded') | undefined, authentication?: (BasicAuthAuthentication | BearerTokenAuthentication | ApiKeyAuthentication) | undefined, custom_headers?: {[key: string]: string} | undefined}};

export type CreateApiApiV2WebhooksTestArgs = {webhook_id?: string | undefined, body: WebhookTestRequest};

export type CreateApiApiV2WebhooksTestOptions = {baseUrl?: string | undefined, apiTokenAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const webhookTestResponse = z.object({test: z.object({status: z.string().optional(), message: z.string().optional(), response_code: z.number().int().optional(), response_body: z.string().optional()}).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
};

/**
 * Test Webhook
 * 
 * POST /api/v2/webhooks/test
 */
export const createApiApiV2WebhooksTest = async (args: CreateApiApiV2WebhooksTestArgs, options?: CreateApiApiV2WebhooksTestOptions) => {
const {baseUrl = "https://example.zendesk.com", fetch: fetchFn = fetch, apiTokenAuth} = options ?? {}

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

if (args.webhook_id != null) query.append("webhook_id", String(args.webhook_id))
if (apiTokenAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${apiTokenAuth.username}:${apiTokenAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v2/webhooks/test${query.size > 0 ? `?${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(webhookTestResponse, await res.json())
};