import {z} from 'zod'

export type ChannelType = 'webhook' | 'email';

export type GetApiApiV1NotificationsChannelsArgs = {channel_type: ChannelType, enabled?: (boolean | null) | undefined, 'unstructured-api-key'?: (string | null) | undefined};

export type GetApiApiV1NotificationsChannelsOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const webhookChannelResponse = z.object({channel_type: z.literal("webhook").optional(), id: z.string(), description: z.string().nullable().optional(), event_types: z.array(z.string()), enabled: z.boolean(), created_at: z.string(), updated_at: z.string(), url: z.string()});

export const emailChannelConfigResponse = z.object({cc: z.array(z.string()).nullable().optional(), reply_to: z.string().nullable().optional(), recipient_email: z.string(), provider: z.string()});

export const emailChannelResponse = z.object({channel_type: z.literal("email").optional(), id: z.string(), description: z.string().nullable().optional(), event_types: z.array(z.string()), enabled: z.boolean(), created_at: z.string(), updated_at: z.string(), email_config: emailChannelConfigResponse});

export const channelListResponse = z.object({items: z.array(z.discriminatedUnion("channel_type", [webhookChannelResponse, emailChannelResponse]))});

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 Channels
 * 
 * GET /api/v1/notifications/channels
 */
export const getApiApiV1NotificationsChannels = async (args: GetApiApiV1NotificationsChannelsArgs, options: GetApiApiV1NotificationsChannelsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.channel_type != null) query.append("channel_type", String(args.channel_type))
if (args.enabled != null) query.append("enabled", String(args.enabled))
if (args['unstructured-api-key'] != null) headers.set("unstructured-api-key", String(args['unstructured-api-key']))

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/notifications/channels${query.size > 0 ? `?${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(channelListResponse, await res.json())
};