import type { SlackMessage } from './weekly-report'

export type SlackResult =
	| { ok: true }
	| { ok: false, reason: 'not_configured' | 'rejected', detail?: string }

export function slackWebhook(): string | undefined {
	const url = process.env.SLACK_WEBHOOK_URL?.trim()

	return url === '' ? undefined : url
}

export async function sendToSlack(message: SlackMessage, webhook = slackWebhook()): Promise<SlackResult> {
	if (!webhook) {
		return { ok: false, reason: 'not_configured' }
	}

	const response = await fetch(webhook, {
		method: 'POST',
		headers: { 'content-type': 'application/json' },
		body: JSON.stringify(message),
	})

	if (!response.ok) {
		return { ok: false, reason: 'rejected', detail: `${response.status} ${await response.text()}` }
	}

	return { ok: true }
}