import {z} from 'zod'

export type GetApiV1ChannelsOptions = {baseUrl: string, OAuth2AuthorizationCodeBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const webhookFormat = z.enum(["auto", "slack-blockkit", "slack-legacy", "raw-data"]);

export const webhook = z.object({type: z.literal("webhook"), format: webhookFormat, url: z.string()});

export const opsgenie = z.object({type: z.literal("opsgenie"), auth_key: z.string(), base_url: z.string().optional()});

export const pagerdutyRegion = z.enum(["us", "eu"]);

export const pagerduty = z.object({type: z.literal("pagerduty"), routing_key: z.string(), region: pagerdutyRegion.optional()});

export const pagerdutyIntegration = z.object({type: z.literal("pagerduty-integration"), install_id: z.string(), service_id: z.string()});

export const notification = z.object({type: z.literal("notification"), recipients: z.array(z.string())});

export const slackIntegration = z.object({type: z.literal("slack-integration"), install_id: z.string(), channel_id: z.string(), include_agent_prompt: z.boolean().optional()});

export const email = z.object({type: z.literal("email"), recipients: z.array(z.string())});

export const webPush = z.object({type: z.literal("web-push"), recipients: z.array(z.string())});

export const channelRead = z.object({id: z.string(), organization_id: z.string(), label: z.string(), active: z.boolean(), created_at: z.string(), updated_at: z.string().nullable(), created_by_name: z.string().nullable(), updated_by_name: z.string().nullable(), config: z.discriminatedUnion("type", [webhook, opsgenie, pagerduty, pagerdutyIntegration, notification, slackIntegration, email, webPush])});

export const getApiV1ChannelsResponse = z.array(channelRead);

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 /v1/channels/
 */
export const getApiV1Channels = async (options: GetApiV1ChannelsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth2AuthorizationCodeBearer} = options ?? {}

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

if (OAuth2AuthorizationCodeBearer !== undefined) headers.set('authorization', `Bearer ${OAuth2AuthorizationCodeBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/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(getApiV1ChannelsResponse, await res.json())
};