import path from "node:path";

import { consola } from "consola";

import { execa } from "execa";

import fs from "fs-extra";

import pc from "picocolors";

import yoctoSpinner from "yocto-spinner";

import type { ProjectOptions } from "@/types";

import { EXTRAS_DIR } from "@/utils";

import { nameGenerator } from "@/utils/name-generator";

import { honoClientTemplate, honoRpcTemplate } from "@/utils/templates";

export async function rpcInstaller(

	options: Required<ProjectOptions>,

): Promise<boolean> {

	const spinner = yoctoSpinner({ text: "Setting up RPC client..." }).start();

	try {

		const { projectName, rpc, shadcn, tailwind } = options;

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

		// 1. Update client package.json to ensure hono client is installed

		const clientPkgPath = path.join(projectPath, "client", "package.json");

		const clientPkg = await fs.readJson(clientPkgPath);

		if (!clientPkg.dependencies.hono) {

			await execa("bun", ["install", "hono"], { cwd: projectPath });

		}

		await fs.writeJson(clientPkgPath, clientPkg, { spaces: 2 });

		// 2. Update server package.json dev script for RPC

		const serverPkgPath = path.join(projectPath, "server", "package.json");

		const serverPkg = await fs.readJson(serverPkgPath);

		// Update the dev script to include parallel TypeScript compilation

		serverPkg.scripts.dev = "bun --watch run src/index.ts & tsc --watch";

		// Add exports mapping for server/client subpath

		serverPkg.exports = {

			...serverPkg.exports,

			"./client": {

				types: "./dist/client.d.ts",

				default: "./dist/client.js",

			},

		};

		await fs.writeJson(serverPkgPath, serverPkg, { spaces: 2 });

		// 3. Server modification for RPC export type (no client imports)

		const serverIndexPath = path.join(projectPath, "server", "src", "index.ts");

		await fs.writeFile(serverIndexPath, honoRpcTemplate, "utf8");

		// 4. Create separate client helper file

		const clientHelperPath = path.join(

			projectPath,

			"server",

			"src",

			"client.ts",

		);

		await fs.writeFile(clientHelperPath, honoClientTemplate, "utf8");

		// 5. Update App.tsx based on template selection using switch statement

		const appTsxSrc = path.join(

			EXTRAS_DIR,

			"client",

			"src",

			"App.tsx",

			nameGenerator("App.tsx", { tailwind, shadcn, rpc }),

		);

		const appTsxTarget = path.join(projectPath, "client", "src", "App.tsx");

		fs.copySync(appTsxSrc, appTsxTarget);

		spinner.success("RPC client setup completed");

		return true;

	} catch (err: unknown) {

		spinner.error("Failed to set up RPC client");

		if (err instanceof Error) {

			consola.error(pc.red("Error:"), err.message);

		} else {

			consola.error(pc.red("Error: Unknown error"));

		}

		return false;

	}

}