import esbuild from "esbuild";
import process from "process";
import builtins from "builtin-modules";
import esbuildSvelte from "esbuild-svelte";
import { sassPlugin } from "esbuild-sass-plugin";
import { sveltePreprocess } from "svelte-preprocess";
import dotenv from "dotenv";
import dotenvExpand from "dotenv-expand";
import fs from "fs";
import path from "path";
import { execSync } from "child_process";

const manifest = JSON.parse(fs.readFileSync("manifest.json", "utf8"));

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 commitHash = execSync("git rev-parse --short HEAD");
const devManifest = {
	...manifest,
	id: `${manifest.id}-dev`,
	name: `${manifest.name} (Dev)`,
	version: `dev-${commitHash}`,
};

const context = await esbuild.context({
	banner: {
		js: banner,
	},
	entryPoints: ["src/main.ts"],
	bundle: true,
	plugins: [
		esbuildSvelte({
			preprocess: sveltePreprocess(),
			compilerOptions: {
				dev: !prod,
				warningFilter: (warning) =>
					!warning.filename?.includes("node_modules"),
			},
		}),
		sassPlugin(),
		{
			name: "copy-plugin",
			setup(build) {
				build.onEnd(() => {
					try {
						console.log("Writing manifest.json");
						fs.writeFileSync(
							path.resolve(outDir, "manifest.json"),
							JSON.stringify(prod ? manifest : devManifest)
						);
					} catch (e) {
						console.error("Failed to rename file:", e);
					}
				});
			},
		},
		{
			name: "rename-plugin",
			setup(build) {
				build.onEnd(async () => {
					try {
						console.log("Renaming main.css to styles.css");
						fs.renameSync(
							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,
	],
	conditions: ["svelte"],
	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();
}