import * as esbuild from "esbuild";
import postcss from "postcss";
import tailwindcss from "@tailwindcss/postcss";
import { readFile } from "fs/promises";
import path from "path";
import { existsSync } from "fs";
import grabDirNames from "../../../utils/grab-dir-names";
import { log } from "../../../utils/log";
const { ROOT_DIR } = grabDirNames();
let error_logged = false;
// One processor for the whole process, so the Tailwind plugin's internal
// state survives across rebuilds instead of being recreated per file load.
let css_processor;
function grabCSSProcessor() {
    if (!css_processor) {
        css_processor = postcss([tailwindcss()]);
    }
    return css_processor;
}
export function createTailwindEsbuildPlugin({ process_css = true, } = {}) {
    return {
        name: process_css ? "tailwindcss" : "css-stub",
        setup(build) {
            build.onLoad({ filter: /\.css$/ }, async (args) => {
                if (!process_css) {
                    return { contents: "", loader: "css" };
                }
                try {
                    const source = await readFile(args.path, "utf-8");
                    const result = await grabCSSProcessor().process(source, {
                        from: args.path,
                    });
                    error_logged = false;
                    return { contents: result.css, loader: "css" };
                }
                catch (error) {
                    return { errors: [{ text: error.message }] };
                }
            });
            build.onResolve({ filter: /\.css$/ }, async (args) => {
                const css_path = path.resolve(args.resolveDir, args.path.replace(/\@\//g, ROOT_DIR + "/"));
                const does_path_exist = existsSync(css_path);
                if (!does_path_exist && !error_logged) {
                    const err_msg = `CSS Error: ${css_path} file does not exist.`;
                    log.error(err_msg);
                    error_logged = true;
                }
                return {
                    path: css_path,
                };
            });
        },
    };
}
/**
 * Resolves `.css` imports like the Tailwind plugin but loads them empty.
 */
export const cssStubEsbuildPlugin = createTailwindEsbuildPlugin({
    process_css: false,
});
const tailwindEsbuildPlugin = createTailwindEsbuildPlugin();
export default tailwindEsbuildPlugin;