package com.hubilon.handler;

import com.hubilon.util.HttpResponses;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;

import java.io.IOException;
import java.io.InputStream;
import java.util.Map;

/**
 * Serves the embedded UI assets: index.html was split into markup, style.css
 * and app.js (plus messages.js for editable wording) so each can be read and
 * changed independently in the jar's resources. Registered on "/", so it also
 * catches anything not claimed by the more specific API contexts.
 */
public final class StaticHandler implements HttpHandler {

    private static final Map<String, String[]> ASSETS = Map.of(
            "/", new String[]{"/static/index.html", "text/html; charset=utf-8"},
            "/index.html", new String[]{"/static/index.html", "text/html; charset=utf-8"},
            "/style.css", new String[]{"/static/style.css", "text/css; charset=utf-8"},
            "/messages.js", new String[]{"/static/messages.js", "application/javascript; charset=utf-8"},
            "/app.js", new String[]{"/static/app.js", "application/javascript; charset=utf-8"}
    );

    @Override
    public void handle(HttpExchange exchange) throws IOException {
        String path = exchange.getRequestURI().getPath();
        String[] asset = ASSETS.get(path);
        if (asset == null) {
            HttpResponses.sendText(exchange, 404, "text/plain; charset=utf-8", "Not found: " + path);
            return;
        }

        try (InputStream in = StaticHandler.class.getResourceAsStream(asset[0])) {
            if (in == null) {
                HttpResponses.sendText(exchange, 404, "text/plain; charset=utf-8", asset[0] + " not found in jar");
                return;
            }
            byte[] bytes = in.readAllBytes();
            HttpResponses.sendBytes(exchange, 200, asset[1], bytes);
        }
    }
}