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 WebhookSigningSecret = {algorithm?: string | undefined, secret?: string | undefined};

export type Webhook = {id?: string | undefined, name: string, description?: string | undefined, endpoint: string, http_method: 'GET' | 'POST' | 'PUT' | 'PATCH' | 'DELETE', request_format: 'json' | 'xml' | 'form_encoded', status: 'active' | 'inactive', subscriptions?: Array<string> | undefined, authentication?: (BasicAuthAuthentication | BearerTokenAuthentication | ApiKeyAuthentication) | undefined, custom_headers?: {[key: string]: string} | undefined, signing_secret?: WebhookSigningSecret | undefined, external_source?: ({name?: string | undefined, version?: string | undefined}) | undefined, created_at?: string | undefined, created_by?: string | undefined, updated_at?: string | undefined, updated_by?: string | undefined};

export type WebhookCreateRequest = {webhook: Webhook};

export type CreateApiApiV2WebhooksArgs = {clone_webhook_id?: string | undefined, body: WebhookCreateRequest};

export type CreateApiApiV2WebhooksOptions = {baseUrl?: string | undefined, apiTokenAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const basicAuthAuthentication = z.object({type: z.literal("basic_auth"), data: z.object({username: z.string(), password: z.string().optional()}).optional()});

export const bearerTokenAuthentication = z.object({type: z.literal("bearer_token"), data: z.object({token: z.string().optional()}).optional()});

export const apiKeyAuthentication = z.object({type: z.literal("api_key"), data: z.object({name: z.string(), value: z.string().optional()}).optional(), add_position: z.enum(["header", "query_string"])});

export const webhookSigningSecret = z.object({algorithm: z.string().optional(), secret: z.string().optional()});

export const webhook = z.object({id: z.string().optional(), name: z.string(), description: z.string().optional(), endpoint: z.string(), http_method: z.enum(["GET", "POST", "PUT", "PATCH", "DELETE"]), request_format: z.enum(["json", "xml", "form_encoded"]), status: z.enum(["active", "inactive"]), subscriptions: z.array(z.string()).optional(), authentication: z.union([basicAuthAuthentication, bearerTokenAuthentication, apiKeyAuthentication]).optional(), custom_headers: z.record(z.string(), z.string()).optional(), signing_secret: webhookSigningSecret.optional(), external_source: z.object({name: z.string().optional(), version: z.string().optional()}).optional(), created_at: z.string().optional(), created_by: z.string().optional(), updated_at: z.string().optional(), updated_by: z.string().optional()});

export const webhookResponse = z.object({webhook: webhook.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
};

/**
 * Create or Clone Webhook
 * 
 * POST /api/v2/webhooks
 */
export const createApiApiV2Webhooks = async (args: CreateApiApiV2WebhooksArgs, options?: CreateApiApiV2WebhooksOptions) => {
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.clone_webhook_id != null) query.append("clone_webhook_id", String(args.clone_webhook_id))
if (apiTokenAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${apiTokenAuth.username}:${apiTokenAuth.password}`)}`)

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