/*
	Automatically appends our license preamble to each source file.
	Does not prepend if preamble already exists.
	Does not replace if change in util/licensePreamble.txt was made.
	Does not prepend is file contains @fc-license-skip
*/

const Path = require("path");
const fs = require("fs");
const walk = require("./util/walk");

const SPACEBAR_SOURCE_DIR = Path.join(__dirname, "..", "src");
const SPACEBAR_SCRIPTS_DIR = Path.join(__dirname);
const SPACEBAR_LICENSE_PREAMBLE = fs
    .readFileSync(Path.join(__dirname, "util", "licensePreamble.txt"))
    .toString()
    .split("\r") // remove windows bs
    .join("") // ^
    .split("\n")
    .map((x) => `\t${x}`)
    .join("\n");

const languageCommentStrings = {
    js: ["/*", "*/"],
    ts: ["/*", "*/"],
};

const addToDir = (dir) => {
    const files = walk(dir, Object.keys(languageCommentStrings));

    for (let path of files) {
        const file = fs.readFileSync(path).toString().split("\r").join("");
        const fileType = path.slice(path.lastIndexOf(".") + 1);
        const commentStrings = languageCommentStrings[fileType];
        if (!commentStrings) continue;

        const preamble = commentStrings[0] + "\n" + SPACEBAR_LICENSE_PREAMBLE + "\n" + commentStrings[1];

        if (file.startsWith(preamble)) {
            continue;
        }

        // This is kind of lame.
        if (file.includes("@fc-license-skip") && path != __filename) {
            console.log(`skipping ${path} as it has a different license.`);
            continue;
        }

        console.log(`writing to ${path}`);
        fs.writeFileSync(path, preamble + "\n\n" + file);
    }
};

addToDir(SPACEBAR_SOURCE_DIR);
addToDir(SPACEBAR_SCRIPTS_DIR);