console.time("Build time");
import esbuild from "esbuild";
import htmlMinifier from "html-minifier-terser";
import fsSync from "fs";

export default async ()=> {
    const fs = fsSync.promises;
    const isProduction = true;

    const esbuildProm = esbuild.build({
        entryPoints: [`${import.meta.dirname}/index.js`, `${import.meta.dirname}/index.css`],
        bundle: true,
        minify: isProduction,
        write: false,
        outdir: import.meta.dirname
    });
    const htmlProm = fs.readFile(`${import.meta.dirname}/index.html`, "utf-8");
    const [build, html] = await Promise.all([esbuildProm, htmlProm]);

    let js, css;
    for(let i = 0; i < build.outputFiles.length; i++){
        if(build.outputFiles[i].path.endsWith(".js")){
            js = build.outputFiles[i].text;
        }else if(build.outputFiles[i].path.endsWith(".css")){
            css = build.outputFiles[i].text;
        }
    }

    let data = await htmlMinifier.minify(html, {
        collapseBooleanAttributes: true,
        collapseInlineTagWhitespace: true,
        collapseWhitespace: true,
        conservativeCollapse: true,
        decodeEntities: true,
        noNewlinesBeforeTagClose: true,
        removeComments: true
    });

    data = data.replace("<script></script>", `<script>${js}</script>`)
    data = data.replace("<style></style>", `<style>${css}</style>`)

    console.timeEnd("Build time");
    return data;
}