import {z} from 'zod'

export type EndpointChallengeMode = 'challenge-response' | 'echo';

export type McpEventsDeliveryMode = 'webhook';

export type McpEventsSubscribeDeliveryIn = {mode: McpEventsDeliveryMode, secret: string, url: string};

export type McpEventsSubscribeIn = {arguments?: Record<string, never> | undefined, challengeMode?: EndpointChallengeMode | undefined, channels?: (Array<string> | null) | undefined, delivery: McpEventsSubscribeDeliveryIn, name: string, secretGracePeriodSeconds?: (number | null) | undefined, ttlMs?: (number | null) | undefined};

export type CreateApiApiV1AppAppIdMcpEventsSubscribeArgs = {app_id: string, 'idempotency-key'?: string | undefined, body: McpEventsSubscribeIn};

export type CreateApiApiV1AppAppIdMcpEventsSubscribeOptions = {baseUrl?: string | undefined, HTTPBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const mcpEventsSubscribeOut = z.object({cursor: z.string().nullable().optional(), endpointId: z.string().min(30).max(30), id: z.string().min(1).max(256), refreshBefore: z.string().nullable().optional(), truncated: z.boolean()});

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
};

/**
 * Subscribe to MCP Events
 * 
 * POST /api/v1/app/{app_id}/mcp-events/subscribe
 */
export const createApiApiV1AppAppIdMcpEventsSubscribe = async (args: CreateApiApiV1AppAppIdMcpEventsSubscribeArgs, options?: CreateApiApiV1AppAppIdMcpEventsSubscribeOptions) => {
const {baseUrl = "https://api.eu.svix.com", fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (args['idempotency-key'] != null) headers.set("idempotency-key", String(args['idempotency-key']))
if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/app/${encodeURIComponent(String(args.app_id))}/mcp-events/subscribe${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(mcpEventsSubscribeOut, await res.json())
};