import esbuild from "esbuild";
import process from "process";
import builtins from "builtin-modules";
import esbuildSvelte from "esbuild-svelte";
import { sveltePreprocess } from "svelte-preprocess";
import dotenv from "dotenv";
import dotenvExpand from "dotenv-expand";
import manifest from "./manifest.json" with { type: "json" };
import fs from "fs/promises";
import path from "path";

const env = dotenv.config();
dotenvExpand.expand(env);

const banner = `/*
THIS IS A GENERATED/BUNDLED FILE BY ESBUILD
if you want to view the source, please visit the github repository of this plugin
*/
`;

const prod = process.argv[2] === "production";

let outDir = "dist";
if (!prod) {
	if (!process.env.OBSIDIAN_PLUGIN_DIR) {
		console.log(
			"Set OBSIDIAN_PLUGIN_DIR in the .env file to plugin directory to copy files to."
		);
	} else {
		outDir = process.env.OBSIDIAN_PLUGIN_DIR + "/" + manifest.id + "-dev";
	}
}

if (outDir[0] === "~") {
	outDir = path.join(process.env.HOME, outDir.slice(1));
}

const context = await esbuild.context({
	banner: {
		js: banner,
	},
	entryPoints: ["src/main.ts"],
	bundle: true,
	plugins: [
		esbuildSvelte({
			preprocess: sveltePreprocess(),
			compilerOptions: { dev: !prod },
		}),
		{
			name: 'copy-plugin',
			setup(build) {
				build.onEnd(async () => {
					try {
						await fs.copyFile(new URL('./manifest.json', import.meta.url), path.resolve(outDir, 'manifest.json'));
					} catch (e) {
						console.error('Failed to rename file:', e);
					}
				});
			},
		},
		{
			name: 'rename-plugin',
			setup(build) {
				build.onEnd(async () => {
					try {
						await fs.rename(path.resolve(outDir, 'main.css'), path.resolve(outDir, 'styles.css'));
					} catch (e) {
						console.error('Failed to rename file:', e);
					}
				});
			},
		}
	],
	external: [
		"obsidian",
		"electron",
		"@codemirror/autocomplete",
		"@codemirror/collab",
		"@codemirror/commands",
		"@codemirror/language",
		"@codemirror/lint",
		"@codemirror/search",
		"@codemirror/state",
		"@codemirror/view",
		"@lezer/common",
		"@lezer/highlight",
		"@lezer/lr",
		...builtins,
	],
	format: "cjs",
	target: "es2018",
	logLevel: "info",
	sourcemap: prod ? false : "inline",
	treeShaking: true,
	outdir: outDir,
	minify: prod
});

if (prod) {
	await context.rebuild();
	process.exit(0);
} else {
	await context.watch();
}