import glob from "tiny-glob";
import { build } from "esbuild";
import { promises as fs } from "fs";
import { relative } from "node:path";

import { embeddable_file_extensions } from "../embeddable-file-extensions.js";
import { generateCollections } from "../generate-collections.js";
import { generateComponents } from "../generate-components.js";
import { generateRoutes } from "../generate-routes.js";
import { Builder } from "./builder.js";
import { rewrite_asset_imports_plugin } from "../esbuild-plugins/rewrite-asset-imports.js";
import { load_assets_plugin } from "../esbuild-plugins/load-assets.js";

export class BackendTSBuilder extends Builder {
	getName(): string {
		return "backend-ts";
	}

	ownsFile(file_path: string) {
		return (
			(file_path.endsWith(".ts") || file_path.endsWith(".tsx")) &&
			!file_path.endsWith("src/back/collections/collections.ts") &&
			!file_path.endsWith("src/back/routes/routes.ts") &&
			!file_path.endsWith("src/back/routes/urls.ts") &&
			!file_path.endsWith("stimulus.ts") &&
			!file_path.startsWith("src/front")
		);
	}

	async dispose(): Promise<void> {}

	async _build(): Promise<void> {
		await Promise.all([
			generateCollections(),
			generateRoutes(),
			generateComponents(),
		]);
		const entryPoints = (
			await glob(
				`./src/back/**/*.{ts,tsx,${embeddable_file_extensions.join(
					","
				)}}`
			)
		).filter((path) => !path.includes(".#"));

		const { metafile } = await build({
			entryPoints,
			sourcemap: true,
			bundle: false,
			jsxFactory: "TempstreamJSX.createElement",
			jsxFragment: "TempstreamJSX.Fragment",
			outdir: "./dist/back",
			logLevel: "info",
			platform: "node",
			target: "es2022",
			format: "esm",
			loader: Object.fromEntries(
				embeddable_file_extensions.map((ext) => ["." + ext, "js"])
			),
			plugins: [
				rewrite_asset_imports_plugin(this.project_dir),
				load_assets_plugin,
			],
			metafile: true,
		});

		await fs.writeFile(
			relative(this.project_dir, "dist") + "/" + "back" + ".meta.json",
			JSON.stringify(metafile)
		);
	}
}