import path from "node:path";

import { execa } from "execa";

export interface AddPackageDependencyOptions {

	dependencies: string[];

	devMode?: boolean;

	projectName: string;

	target?: "client" | "server";

}

export const addPackageDependency = async (

	opts: AddPackageDependencyOptions,

) => {

	const { dependencies, devMode = false, projectName, target } = opts;

	// Early validation - only validate project name, allow empty dependencies

	if (!projectName.trim()) {

		throw new Error("Project name is required");

	}

	// Construct base command args once

	const baseArgs = ["install"];

	if (devMode) {

		baseArgs.push("-D");

	}

	const installArgs = [...baseArgs, ...dependencies];

	// Determine working directory

	const projectPath = path.resolve(process.cwd(), projectName);

	let workingDir = projectPath;

	if (target) {

		workingDir = path.join(projectPath, target);

	}

	try {

		await execa("bun", installArgs, {

			cwd: workingDir,

		});

	} catch (error) {

		const targetSuffix = target ? ` in ${target}` : "";

		throw new Error(

			`Failed to install dependencies${targetSuffix}: ${error instanceof Error ? error.message : String(error)}`,

		);

	}

};