import {z} from 'zod'

export type TextPart = {text: string, type?: 'text' | undefined};

export type DataPart = {data: unknown, type?: 'data' | undefined};

export type CreateTaskEventRequest = {content?: (TextPart | DataPart | null) | undefined, idempotency_key?: (string | null) | undefined, persist_message?: boolean | undefined};

export type CreateApiTasksTaskIdEventsArgs = {task_id: string, body: CreateTaskEventRequest};

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

export const textPart = z.object({text: z.string(), type: z.literal("text").optional()});

export const dataPart = z.object({data: z.unknown(), type: z.literal("data").optional()});

export const event = z.object({agent_id: z.string(), content: z.union([textPart, dataPart]).nullable().optional(), created_at: z.string().nullable().optional(), id: z.string(), sequence_id: z.number().int(), streamCapabilities: z.array(z.string()).nullable().optional(), task_id: z.string()});

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
};

/**
 * Send Event to Task
 * 
 * POST /tasks/{task_id}/events
 */
export const createApiTasksTaskIdEvents = async (args: CreateApiTasksTaskIdEventsArgs, options: CreateApiTasksTaskIdEventsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/tasks/${encodeURIComponent(String(args.task_id))}/events${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(event, await res.json())
};