let FS = require("fs")
let Fetch = require("node-fetch")

let files = FS.readdirSync(`./in/`);
let kson = {
	files: {},
	tags: {}
};

let csv = FS.readFileSync(`./tags.csv`)
csv = csv.toString().split("\n")
for ( let i in csv ) {
	let [k, v] = csv[i].split(",")
	kson.tags[k] = parseInt(v);
}

// fill it with tags of whatever you don't want to make it into the filename
// for starters, you can also add "anthro", "male", "female", as they're very common tags
let filters = [
	"female"
];

let parse = async () => {
	for ( let i in files ) {
		let file = files[i];
		let md5 = file.match(/^([a-f0-9]{32})/);
		if ( !md5 ) continue;
		md5 = md5[1];
		let ext = file.split(".").pop()
		console.log(i, files.length, md5, ext);

		let r = await Fetch( `https://e621.net/posts.json?tags=md5:${md5}`, {
			headers: {
				'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36'
			}
		} );
		let json = JSON.parse(await r.text());	
		json = json.posts[0];
		if ( !json ) continue;
		tags = [];

		let artist = "";
		let content = "";
		switch ( json.rating ) {
			case "s": content = "safe content"; break;
			case "q": content = "questionable content"; break;
			case "e": content = "explict content"; break;
		}

		for ( let cat in json.tags ) {
			if ( cat === "artist" ) {
				let tag = "by " + json.tags["artist"].join(" and ")
				if ( !kson.tags[tag] ) continue;
				artist = tag;
			} else for ( let k in json.tags[cat] ) {
				let tag = json.tags[cat][k];
				if ( !kson.tags[tag] ) continue;
				if ( tag.indexOf("/") >= 0 ) continue;
				if ( filters.includes(tag) ) continue;
				tags.push(tag);
			}
		}
		tags = tags.sort( (a, b) => {
			return kson.tags[b] - kson.tags[a]
		})
		if ( artist ) tags.unshift(artist);
		if ( content ) tags.unshift(content);

		kson.files[md5] = tags;

		let jointmp = "";
		let filtered = [];
		for ( let i in tags ) {
			if ( (jointmp + " " + tags[i]).length > 192 ) break; // arbitrary limit for filenames and tokens, adjust if you're getting bitched at from the web UI
			jointmp += " " + tags[i];
			filtered.push(tags[i])
		}
		let joined = filtered.join(" ")

		require("fs").copyFileSync(`./in/${file}`, `./out/${joined}.${ext}`)

		// rate limit
		await new Promise( (resolve) => {
			setTimeout(resolve, 500)
		} )
	}
}

parse();