import 'dotenv/config'

import { items, linkFormat } from './config.js'
import {
	getAtomFeed,
	getHardcoverActivity,
	getJsonFeedItemTitle,
	getLetterboxdActivity,
	getListenBrainzScrobble,
	getMalojaScrobble,
	getMastodonPost,
	getRSSItemTitle,
	getSomePicsPost,
	getSourceTubeActivity,
	getSteamRecentlyPlayed,
	getTraktEpisode,
	getTraktMovie,
	htmlServiceLinkRegex,
	markdownCharEscape,
	markdownServiceLinkRegex,
} from './utils.js'

const feedHandlers = {
	rss: getRSSItemTitle,
	atom: getAtomFeed,
	json: getJsonFeedItemTitle,
	'some.pics': getSomePicsPost,
	'source.tube': getSourceTubeActivity,
	mastodon: getMastodonPost,
	letterboxd: getLetterboxdActivity,
	'trakt-episode': getTraktEpisode,
	'trakt-movie': getTraktMovie,
	steam: getSteamRecentlyPlayed,
	listenbrainz: getListenBrainzScrobble,
	maloja: getMalojaScrobble,
	hardcover: getHardcoverActivity,
}

const OMGLOL_API = `https://api.omg.lol/address/${process.env.OMGLOL_USERNAME}/now`

export async function getNow() {
	const res = await fetch(OMGLOL_API)
	const data = await res.json()
	return data.response.now.content
}

export async function setNow(newNow) {
	const res = await fetch(OMGLOL_API, {
		method: 'POST',
		headers: {
			'Content-Type': 'application/json',
			Authorization: `Bearer ${process.env.OMGLOL_KEY}`,
		},
		body: JSON.stringify({
			content: newNow,
			listed: 1,
		}),
	})
	const data = await res.json()
	console.log(`\n${data.response.message}`)
}

export default async function now() {
	const now = await getNow()
	let newNow = now

	await Promise.all(
		items.map(async (item) => {
			try {
				const handler = feedHandlers[item.feedType]
				if (!handler) {
					throw new Error(`Unknown feedType: ${item.feedType}`)
				}

				// build feedUrl from template if provided
				let feedUrl = item.feedUrl
				if (item.feedUrlTemplate) {
					feedUrl = item.feedUrlTemplate
						.replace('{userId}', item.userId || '')
						.replace('{instance}', item.instance || '')
				}

				// generic handlers expect just feedUrl string, special handlers expect config object
				const handlerParam = [
					'rss',
					'atom',
					'json',
					'maloja',
					'some.pics',
				].includes(item.feedType)
					? feedUrl
					: { ...item, feedUrl }
				const latest = await handler(handlerParam)
				console.log(`${item.id}: ${latest.text}`)
				console.log(`${item.id} URL: ${latest.url}`)
				if (latest.image) console.log(`${item.id} Image: ${latest.image}`)
				if (latest.video) console.log(`${item.id} Video: ${latest.video}`)

				// apply markdown escaping only for markdown links
				const displayText =
					linkFormat === 'html'
						? latest.text
						: markdownCharEscape(latest.text)

				if (latest && latest.text && latest.url) {
					// generate regex based on id and linkFormat
				const regex =
					linkFormat === 'html'
						? htmlServiceLinkRegex(item.id)
						: markdownServiceLinkRegex(item.id)

				console.log(`\nDEBUG: Testing regex for ${item.id}`)
				console.log(`Regex: ${regex}`)
				const matched = regex.test(newNow)
				console.log(`Regex match found: ${matched}`)

				newNow = newNow.replace(regex, (match, openTag, oldText, closeTag) => {
						console.log(`DEBUG: Replacing match for ${item.id}`)
						console.log(`Old match: ${match}`)
						console.log(`Old text: ${oldText}`)
						// replace href in opening tag
						const updatedOpenTag = openTag.replace(
							/href=["'][^"']*["']/,
							`href="${latest.url}"`,
						)
						const result = `${updatedOpenTag}${displayText}${closeTag}`
						console.log(`New replacement: ${result}`)
						return result
					})

					// replace image/video placeholders if available, otherwise remove tags
					const imageId = `${item.id}-image`
					const videoId = `${item.id}-video`
					if (latest.image) {
						// html image replacement
						newNow = newNow.replace(
							new RegExp(`(<img[^>]+src=["'])${imageId}(["'][^>]*>)`, 'gi'),
							`$1${latest.image}$2`,
						)
						// markdown image replacement
						newNow = newNow.replace(
							new RegExp(`(!\\[[^\\]]*\\]\\()${imageId}(\\))`, 'gi'),
							`$1${latest.image}$2`,
						)
					} else {
						// remove img tags if no image available (handle multi-line tags and any attribute order)
						newNow = newNow.replace(
							new RegExp(`\\s*<img\\b[^>]*\\bsrc=["']${imageId}["'][^>]*>\\s*`, 'gis'),
							'',
						)
						// remove markdown image
						newNow = newNow.replace(
							new RegExp(`!\\[[^\\]]*\\]\\(${imageId}\\)`, 'gi'),
							'',
						)
					}

					if (latest.video) {
						// html video replacement
						newNow = newNow.replace(
							new RegExp(`(<video[^>]+src=["'])${videoId}(["'][^>]*>)`, 'gi'),
							`$1${latest.video}$2`,
						)
					} else {
						// remove video tags if no video available
						newNow = newNow.replace(
							new RegExp(`\\s*<video\\b[^>]*\\bsrc=["']${videoId}["'][^>]*>[\\s\\S]*?</video>\\s*`, 'gis'),
							'',
						)
					}
				}
			} catch (e) {
				console.warn(`⚠️ Failed to fetch ${item.id}`, e)
			}
		}),
	)

	console.log('\n=== FINAL COMPARISON ===')
	console.log(`Original length: ${now.length}`)
	console.log(`New length: ${newNow.length}`)
	console.log(`Strings are equal: ${now === newNow}`)

	if (now === newNow) {
		console.log('\nNow page has no changes')
	} else {
		console.log('\nChanges detected! Updating Now page...')
		await setNow(newNow)
	}
}

await now()