import { t } from '@/i18n'
import { formatAbsoluteDateFromIso, formatRelativeDate } from '@/lib/relativeDate'

export const ENABLE_BROWSER_UPDATES_COMMAND = 'renewcms enable-browser-updates'
export const AUTO_CHECK_INTERVAL_MS = 24 * 60 * 60 * 1000

export function displayVersion(tag: string) {
	return tag.replace(/^v/, '')
}

function isSameLocalDay(a: Date, b: Date) {
	return (
		a.getFullYear() === b.getFullYear() &&
		a.getMonth() === b.getMonth() &&
		a.getDate() === b.getDate()
	)
}

export function formatClock(date: Date) {
	const hours = String(date.getHours()).padStart(2, '0')
	const minutes = String(date.getMinutes()).padStart(2, '0')
	return `${hours}:${minutes}`
}

export function formatLastChecked(iso: string, now: Date = new Date()) {
	const date = new Date(iso)
	const yesterday = new Date(now)
	yesterday.setDate(now.getDate() - 1)
	if (isSameLocalDay(date, now)) {
		return t('Last checked today at {0}', [formatClock(date)])
	}
	if (isSameLocalDay(date, yesterday)) {
		return t('Last checked yesterday at {0}', [formatClock(date)])
	}
	return t('Last checked {0} at {1}', [formatAbsoluteDateFromIso(iso), formatClock(date)])
}

export function isCheckDue(checkedAt: string | null, now: number = Date.now()) {
	if (checkedAt === null) {
		return true
	}
	return now - new Date(checkedAt).getTime() > AUTO_CHECK_INTERVAL_MS
}

export function formatReleased(iso: string) {
	return t('Released {0}', [formatAbsoluteDateFromIso(iso)])
}

const BYTES_PER_MB = 1024 * 1024
const ANNOUNCEMENT_STEP_PERCENT = 25
const LAST_ANNOUNCED_PERCENT = 75

export function formatDownloadProgress(progress: {
	percent: number
	downloaded_bytes: number
	total_bytes: number
}) {
	const done = Math.round(progress.downloaded_bytes / BYTES_PER_MB)
	const total = Math.round(progress.total_bytes / BYTES_PER_MB)
	return t('{0}% · {1} of {2} MB', [progress.percent, done, total])
}

export function downloadAnnouncement(version: string, percent: number) {
	const step = Math.min(
		Math.floor(percent / ANNOUNCEMENT_STEP_PERCENT) * ANNOUNCEMENT_STEP_PERCENT,
		LAST_ANNOUNCED_PERCENT,
	)
	const base = t('Downloading version {0}', [version])
	return step > 0 ? t('{0}, {1} percent', [base, step]) : base
}

export const VERIFYING_ANNOUNCEMENT = 'Checking the download'

const BROWSER_UPDATES_DOCS_PATH = '/src/branch/main/docs/deployment.md#browser-updates'
const RELEASES_SEGMENT = /^(.*)\/releases\//

export function browserUpdatesDocsUrl(releaseUrl: string) {
	try {
		const url = new URL(releaseUrl)
		const repository = RELEASES_SEGMENT.exec(url.pathname)
		return repository ? `${url.origin}${repository[1]}${BROWSER_UPDATES_DOCS_PATH}` : releaseUrl
	} catch {
		return releaseUrl
	}
}

export function formatStartedAt(iso: string) {
	return t('Started at {0}', [formatClock(new Date(iso))])
}

export function formatStartedWithAge(iso: string, now: Date = new Date()) {
	return `${formatStartedAt(iso)} · ${formatRelativeDate(iso, now)}`
}

export function formatUpdatedAt(iso: string, now: Date = new Date()) {
	const date = new Date(iso)
	const yesterday = new Date(now)
	yesterday.setDate(now.getDate() - 1)
	if (isSameLocalDay(date, now)) {
		return t('Updated today at {0}', [formatClock(date)])
	}
	if (isSameLocalDay(date, yesterday)) {
		return t('Updated yesterday at {0}', [formatClock(date)])
	}
	return t('Updated {0} at {1}', [formatAbsoluteDateFromIso(iso), formatClock(date)])
}