import { listMonitors } from './monitors.ts'
import type { DatadogAuthOptions } from './core.ts'

export type ScheduledStatusInput = DatadogAuthOptions & {
	pageSize?: number
}

/**
 * Read-only monitor state counts. The same no-argument contract the disabled
 * scheduled job uses. Never mutates Datadog.
 *
 * @example
 * import status from 'kody:@kody/datadog/scheduled-status'
 * const result = await status()
 */
export async function runMonitorStatus(input: ScheduledStatusInput = {}) {
	const listed = await listMonitors({ ...input, pageSize: input.pageSize ?? 100 })
	const byState: Record<string, number> = {}
	for (const monitor of listed.monitors) {
		const state = String(monitor.overallState || 'Unknown')
		byState[state] = (byState[state] ?? 0) + 1
	}
	return {
		ok: true,
		count: listed.count,
		byState,
		alerting: listed.monitors
			.filter((monitor) => {
				const state = String(monitor.overallState || '').toLowerCase()
				return state === 'alert' || state === 'warn' || state === 'warning'
			})
			.slice(0, 20)
			.map((monitor) => ({
				id: monitor.id,
				name: monitor.name,
				overallState: monitor.overallState,
			})),
	}
}

export default async function scheduledStatus(input: ScheduledStatusInput = {}) {
	return await runMonitorStatus(input)
}