import { telegramRequest } from './request.ts'
import { inputRecord, secretNameFrom } from './validation.ts'

type WebhookInfo = {
	url?: string
	has_custom_certificate?: boolean
	pending_update_count?: number
	last_error_date?: number
	last_error_message?: string
	max_connections?: number
	allowed_updates?: string[]
	ip_address?: string
	[key: string]: unknown
}

/**
 * Read whether a webhook is registered. getUpdates fails with 409 while a
 * webhook URL is set.
 */
export default async function getWebhookInfo(
	params: Record<string, unknown> = {},
) {
	const input = inputRecord(params)
	const secretName = secretNameFrom(input)
	const info = await telegramRequest<WebhookInfo>({
		method: 'getWebhookInfo',
		secretName,
	})
	const url = typeof info.url === 'string' ? info.url : ''
	return {
		ok: true,
		webhookSet: url.length > 0,
		hasUrl: url.length > 0,
		pendingUpdateCount:
			typeof info.pending_update_count === 'number'
				? info.pending_update_count
				: 0,
		lastErrorMessage:
			typeof info.last_error_message === 'string'
				? info.last_error_message
				: null,
		allowedUpdates: Array.isArray(info.allowed_updates)
			? info.allowed_updates
			: [],
		pollingHint: url.length > 0
			? 'A webhook is set, so getUpdates will 409. Preview deleteWebhook with dryRun: true, then confirm: true to switch to polling.'
			: 'No webhook is set; getUpdates polling is available.',
	}
}