const fs = require("fs");
const util = require("util");
const vm = require("node:vm");
const path = require("path");
require('dotenv').config()
const express = require("express");
const session = require("express-session");
const fileUpload = require("express-fileupload");
const SQLiteStore = require("better-sqlite3-session-store")(session);
const { Eta } = require("eta");
const { match } = require("path-to-regexp");
const bcrypt = require("bcrypt");
const cheerio = require("cheerio");
const webPush = require("web-push");
const app = express();
const _expressWs = require("express-ws")(app);
const bodyParser = require("body-parser");
const model = require("./db");
const PORT = 3000;

const db = model.db;
const wsRouter = express.Router()

let viewpath = path.join(__dirname, "views");
let eta = new Eta({ views: viewpath, cache: false, autoEscape: true });

let routes = { GET: [], POST: [], PUT: [], DELETE: [] };
const wsRoutes = {}

app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.use(express.static("public"));
app.use(fileUpload());
app.use("/", wsRouter);

app.use(
  session({
    store: new SQLiteStore({ client: db, expired: { clear: true } }),
    secret: "your secret key",
    resave: false,
    saveUninitialized: true,
    cookie: { secure: false },
  }),
);

const vapidPublicKey = process.env.VAPID_PUBLIC_KEY
const vapidPrivateKey = process.env.VAPID_PRIVATE_KEY

// Configure web-push with your VAPID details
webPush.setVapidDetails(
  "mailto:signups@sheepmail.net", // a mailto URL or URL
  vapidPublicKey,
  vapidPrivateKey,
);

function bootstrapContext(db, structureId, routeId, initContext) {
  const allDbInstances = {};
  function getDb(alias) {
    return allDbInstances[alias];
  }

  // todo wrap template in data-bliss-edit-template thing since ws can't take us to the editor on a component basis?? maybe...
  // for now just designing with component approach
  const eta = model.getTemplater(structureId);

  const libs = { eta, db: getDb, push: webPush };

  let dbs = model.getDbsForStructure(db, structureId);
  let context = vm.createContext({
    ...initContext,
    require: function (str) {
      return libs[str];
    },
    module: { exports: null },
    console: {
      log: function (...content) {
        const s = content.reduce((acc, curr) => {
          console.log(curr);
          return (
            acc +
            (acc ? " " : "") +
            `${util.inspect(curr, {
              showHidden: false,
              depth: null, // `null` lets you see the full depth of the object
              colors: false, // Setting this to true uses ANSI color codes
              compact: false,
            })}`
          );
        }, "");

        model.createLog(db, structureId, routeId, s);
      },
    },
    vapidPublicKey: vapidPublicKey
  });
  for (let appDb of dbs) {
    let dbInstance = model.getDbInstance(appDb.id);
    context.sql = dbInstance;
    vm.runInContext(appDb.library, context);
    allDbInstances[appDb.alias] = {
      library: context.module.exports,
      sql: dbInstance,
    };
    context.module.exports = null;
  }

  return context;
}

function routeWithPrefix(route) {
  const prefix = route.route_prefix;
  return prefix ? path.join(prefix, route.path) : route.path;
}


function bootstrapWebsocketHandler(route) {
  // todo only expose app when running the handler, should not be available to the handler itself
  // need to move to runscript or whatever...or remove app because we can just call it using the handler?
  try {
    const context = bootstrapContext(db, route.structure_id, route.id, { app });
    let handler = vm.runInContext(`${route.handler}\n\nhandler;`, context);

    if (!wsRoutes[routeWithPrefix(route)]) {
      // initialize ws router. future updates will only require updating
      // the wsRoutes dict, not create a whole new route
      wsRouter.ws(routeWithPrefix(route), (ws, req) => {
        ws.render = (template, context) => {
          context = context || {};
          context.route = function (url) {
            return __urlPrefix ? path.join(__urlPrefix, url) : url;
          };
          const eta = model.getTemplater(route.structure_id);
          const structure = model.getStructure(db, route.structure_id);

          ws.send(
            bootstrapTemplateWithHTMXetc(
              eta.render(template, context),
              `/workshop/${route.structure_id}/route/${route.id}`,
              `/workshop/${route.structure_id}/clone_modal/`,
              route.verb == "GET" ? embedHTML(req.originalUrl) : null,
              structure.head_injection,
              htmxRequest = true,
            ),
          );
        };

        return wsRoutes[routeWithPrefix(route)](ws, req)
      });
    }

    wsRoutes[routeWithPrefix(route)] = (ws, req) => {
      try {
        return handler(ws, req)
      } catch (e) {
         const error = e.stack ? `${e}\n\n${e.stack}` : `${e}`;
         model.createLog(db, route.structure_id, route.id, error, true);
         throw e;
      }
    }
    model.updateRoute(db, { ...route, error: null });
  } catch (e) {
    const error = e.stack ? `${e}\n\n${e.stack}` : `${e}`;
    model.createLog(db, route.structure_id, route.id, error, true);
    model.updateRoute(db, { ...route, error: e.stack });
  }
}

function buildRoutes() {
  let newRoutes = {
    GET: [],
    POST: [],
    PUT: [],
    DELETE: [],
  };

  for (let route of model.getAllRoutes(db)) {
    const p = routeWithPrefix(route);
    if (route.verb == "WS") {
      bootstrapWebsocketHandler(route);
    } else {
      newRoutes[route.verb].push({
        matcher: match(p, { decode: decodeURIComponent }),
        id: route.id,
        path: route.path,
      });
    }
  }
  routes = newRoutes;
}

model.applyMigrations();
buildRoutes();

// __   __  _______  _______  ______
// |  | |  ||       ||       ||    _ |
// |  | |  ||  _____||    ___||   | ||
// |  |_|  || |_____ |   |___ |   |_||_
// |       ||_____  ||    ___||    __  |
// |       | _____| ||   |___ |   |  | |
// |_______||_______||_______||___|  |_|

app.post("/register", async (req, res) => {
  try {
    const { username, password } = req.body;
    const hashedPassword = await bcrypt.hash(password, 10); // 10 is the saltRounds
    userId = model.createUser(db, username, hashedPassword);
    req.session.userId = userId;
    res.redirect("/workshop");
  } catch (e) {
    return res.send(eta.render("auth/register", { error: e }));
  }
});

app.post("/login", async (req, res) => {
  const { username, password } = req.body;
  const user = model.getUser(db, username);

  if (user && (await bcrypt.compare(password, user.password))) {
    req.session.userId = user.id;
    return res.redirect("/");
  }

  return res.send(
    eta.render("auth/login", {
      error: "are you sure you entered that right?",
    }),
  );
});

app.get("/register", async (req, res) => {
  if (req.session.userId) {
    return res.redirect("/");
  }
  return res.send(eta.render("auth/register", { error: null }));
});

app.get("/login", async (req, res) => {
  if (req.session.userId) {
    return res.redirect("/");
  }
  return res.send(eta.render("auth/login", { error: null }));
});

app.all("/logout", async (req, res) => {
  return req.session.destroy(() => {
    res.redirect("/");
  });
});

// _     _  _______  ______    ___   _  _______  __   __  _______  _______
// | | _ | ||       ||    _ |  |   | | ||       ||  | |  ||       ||       |
// | || || ||   _   ||   | ||  |   |_| ||  _____||  |_|  ||   _   ||    _  |
// |       ||  | |  ||   |_||_ |      _|| |_____ |       ||  | |  ||   |_| |
// |       ||  |_|  ||    __  ||     |_ |_____  ||       ||  |_|  ||    ___|
// |   _   ||       ||   |  | ||    _  | _____| ||   _   ||       ||   |
// |__| |__||_______||___|  |_||___| |_||_______||__| |__||_______||___|
//
function bootstrapTemplateWithHTMXetc(
  htmlString,
  blissRoute,
  blissClone,
  blissCopy,
  headInjection,
  htmxRequest = false,
) {
  if (
    htmlString.toLowerCase().startsWith("<html>") ||
    htmlString.toLowerCase().startsWith("<!doctype") ||
    !htmxRequest
  ) {
    const $ = cheerio.load(htmlString);
    let head = $("head");

    if (head.length === 0) {
      $("html").prepend("<head></head>");
      head = $("head");
    }

    head.attr("id", "head");

    head.append(`
        <script src="/js/hyperscript.js"></script>
        <script src="/js/tailwind.js"></script>
        <script src="/js/htmx.js"></script>
        <script src="https://unpkg.com/htmx.org@1.9.12/dist/ext/ws.js"></script>
        <script src="/js/bliss_inspector.js"></script>
        <script>
          tailwind.config = {
              corePlugins: {
              preflight: false
            }
          }
        </script>
        <style> body { margin: 0; }</style>
        ${headInjection || ""}
    `);

    if (blissRoute) {
      $("body").attr("data-bliss-route", blissRoute);
      $("body").attr("data-bliss-clone", blissClone);
      if (blissCopy) $("body").attr("data-bliss-copy", blissCopy);
    }

    htmlString = $.html();
  } else if (htmxRequest && blissRoute) {
    const $ = cheerio.load(htmlString, null, false);
    const targets = [];

    // when we return an oob thing from htmx, we'll lose all the attrs when it swaps
    // so this adds those attrs to the children of the swap if possible
    for (let child of $.root().children()) {
      if (child.attribs && child.attribs["hx-swap-oob"]) {
        for (let childchild of child.children) {
          if (childchild.attribs) {
            targets.push(childchild);
          }
        }
      } else {
        targets.push(child);
      }
    }

    // Directly update attributes without wrapping in Cheerio
    for (let target of targets) {
      target.attribs["data-bliss-route"] = blissRoute;
      target.attribs["data-bliss-clone"] = blissClone;
      if (blissCopy) target.attribs["data-bliss-copy"] = blissCopy;
    }

    htmlString = $.html();

    if (htmxRequest) {
      htmlString += `<head id="head" hx-oob-swap="beforeend">${headInjection}</head>`;
    }
  }

  return htmlString;
}

app.post("/workshop", (req, res) => {
  let structId = model.createStructure(db, req.body.name);
  return res.redirect("/workshop/" + structId);
});

app.get("/workshop", (req, res) => {
  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/index", {
        structures: model.getStructures(db),
      }),
    ),
  );
});

function smartRedirect(req, res, redirectUrl) {
  if (req.headers["hx-request"]) {
    res.set("HX-Redirect", redirectUrl);
    res.send();
  } else {
    res.redirect(redirectUrl);
  }
}

function sidebarStuff(db, structId) {
  return {
    structure: model.getStructure(db, structId),
    routes: model.getRoutes(db, structId),
    templates: model.getTemplates(db, structId),
    dbs: model.getDbsForStructure(db, structId),
  };
}

app.get("/workshop/:structure_id", (req, res) => {
  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/editor", sidebarStuff(db, req.params.structure_id)),
    ),
  );
});

app.post("/workshop/:structure_id/clone", (req, res) => {
  let routePrefix = req.body.route_prefix;
  routePrefix = routePrefix[0] == "/" ? routePrefix : "/" + routePrefix;
  let newStructureId;
  try {
    newStructureId = model.cloneStructure(
      req.params.structure_id,
      req.body.name,
      1,
      // req.session.userId,
      routePrefix,
      req.body.clone_dbs,
    );
    buildRoutes();
  } catch (e) {
    return res.send(e.stack);
  }
  return smartRedirect(req, res, `/workshop/${newStructureId}`);
});

app.post("/workshop/:structure_id/db", (req, res) => {
  const dbId = model.createDb(db, req.params.structure_id, req.body.name);
  const redirectUrl = `/workshop/${req.params.structure_id}/db/${dbId}`;
  return smartRedirect(req, res, redirectUrl);
});

app.post("/workshop/:structure_id/db/attach", (req, res) => {
  model.attachDb(db, req.params.structure_id, req.body.db_id, req.body.alias);
  const redirectUrl = `/workshop/${req.params.structure_id}/db/${req.body.db_id}`;
  return smartRedirect(req, res, redirectUrl);
});

app.get("/workshop/:structure_id/db/:db_id", (req, res) => {
  const structdb = model.getDbForStructure(
    db,
    req.params.structure_id,
    req.params.db_id,
  );
  if (!structdb) {
    return res.send("uh oh");
  }
  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/db_garden", {
        db: structdb,
        ...sidebarStuff(db, req.params.structure_id),
      }),
    ),
  );
});

app.post("/workshop/:structure_id/route", (req, res) => {
  let p = req.body.path;

  let dummyHandler =
    "// put your handler code here\n\nfunction handler(req, res) {\n  res.send('henlo world') \n}";

  if (req.body.verb == "WS") {
    dummyHandler = `// put your websocket handler code here\n\nfunction handler(ws, req) {\n  ws.on('message', function(msg) {\n    ws.send(msg);\n  })\n}`;
  }

  if (p[0] == "/") {
    p = p.substring(1);
  }
  if (p[p.length - 1] == "/") {
    p = p.substring(0, p.length - 1);
  }
  const route = model.createRoute(
    db,
    req.body.verb,
    p[0] == "/" ? p.substring(1) : "/" + p,
    req.params.structure_id,
    dummyHandler,
  );
  // todo optimize by only adding new, don't just rebuild all
  buildRoutes();
  return smartRedirect(
    req,
    res,
    `/workshop/${req.params.structure_id}/route/${route}`,
  );
});

app.put("/workshop/:structure_id/route/:route_id", (req, res) => {
  const route = model.getRoute(db, req.params.route_id);
  model.updateRoute(db, { ...route, ...req.body });
  if (route.verb == "WS") {
    bootstrapWebsocketHandler({ ...route, ...req.body })
  }
  return res.send("good");
});

app.put("/workshop/:structure_id/db/:db_id/library", (req, res) => {
  try {
    let dbId = req.params.db_id;
    let appDb = model.getDb(db, dbId);
    model.updateDb(db, { ...appDb, library: req.body.library });
    appDb = model.getDb(db, dbId);

    let dbInstance = model.getDbInstance(dbId);
    let capturedOutput = [];
    let context = vm.createContext({
      module: { exports: null },
      sql: dbInstance,
      console: {
        log: (...args) => capturedOutput.push(args.join(" ")),
      },
    });
    let evaledCode = vm.runInContext(appDb.library, context);
    let stdout = capturedOutput
      .map((v) => {
        return util.inspect(v, {
          showHidden: false,
          depth: null, // `null` lets you see the full depth of the object
          colors: false, // Setting this to true uses ANSI color codes
          compact: false,
        });
      })
      .join("\n");
    return res.send(`${stdout}\n\n> ${evaledCode}`.trim());
  } catch (e) {
    return res.send(`${e}\n\n${e.stack}`);
  }
});

app.post("/workshop/:structure_id/db/:db_id/repl", (req, res) => {
  try {
    let dbId = req.params.db_id;
    let appDb = model.getDb(db, dbId);
    let dbInstance = model.getDbInstance(dbId);
    let capturedOutput = [];
    let context = vm.createContext({
      module: { exports: null },
      sql: dbInstance,
      console: {
        log: (...args) =>
          capturedOutput.push(
            args
              .map((v) => {
                return util.inspect(v, {
                  showHidden: false,
                  depth: null, // `null` lets you see the full depth of the object
                  colors: false, // Setting this to true uses ANSI color codes
                  compact: false,
                });
              })
              .join(" "),
          ),
      },
    });
    const libraryScript = new vm.Script(appDb.library);
    libraryScript.runInContext(context);
    context.library = context.module.exports;
    const replScript = new vm.Script(req.body.code);
    let evaledCode = JSON.stringify(replScript.runInContext(context));
    let stdout = capturedOutput.join("\n");
    return res.send(`${stdout}\n\n> ${evaledCode}`.trim());
  } catch (e) {
    return res.send(`${e}\n\n${e.stack}`);
  }
});

app.post("/workshop/:structure_id/template", (req, res) => {
  let name = req.body.name;

  const template = model.createTemplate(
    db,
    req.params.structure_id,
    name,
    "<div>henlo <%= it.name %></div>",
    "it = { name: 'templates!' };",
  );

  return smartRedirect(
    req,
    res,
    `/workshop/${req.params.structure_id}/template/${template}`,
  );
});

app.put("/workshop/:structure_id/template/:template_id", (req, res) => {
  let id = req.params.template_id;
  let content = req.body.content;
  let test_object = req.body.test_object;

  model.updateTemplate(db, {
    ...model.getTemplate(db, id),
    content,
    test_object,
  });

  return res.send("good");
});

app.get("/workshop/:structure_id/template/:template_id", (req, res) => {
  const template = model.getTemplate(db, req.params.template_id);

  console.log("wassup", {
    template: template,
    ...sidebarStuff(db, req.params.structure_id),
  });

  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/template", {
        template: template,
        ...sidebarStuff(db, req.params.structure_id),
      }),
    ),
  );
});

app.get("/workshop/:structure_id/template/:template_id/preview", (req, res) => {
  const template = model.getTemplate(db, req.params.template_id);
  const struct = model.getStructure(db, req.params.structure_id);
  const eta = model.getTemplater(req.params.structure_id);
  console.log(template);

  const context = vm.createContext({ it: null });
  vm.runInContext(template.test_object, context);

  context.it.route = function (url) {
    return struct.route_prefix ? path.join(struct.route_prefix, url) : url;
  };

  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render(template.name, context.it),
      null,
      null,
      null,
      struct.head_injection,
      false,
    ),
  );
});

app.get("/workshop/:structure_id/route/:id", (req, res) => {
  const route = model.getRoute(db, req.params.id);
  let routePrefix = model.getStructure(
    db,
    req.params.structure_id,
  ).route_prefix;
  let previewUrl = routePrefix
    ? path.join(routePrefix || "", route.path)
    : route.path;

  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/route", {
        route: route,
        previewUrl:
          route["verb"] == "GET" ? previewUrl : "/workshop/do-something-here",
        ...sidebarStuff(db, req.params.structure_id),
      }),
    ),
  );
});

app.get("/workshop/:structure_id/route/:route_id/logs", (req, res) => {
  const since = req.query.since;
  let logs = [];
  if (since != undefined) {
    logs = model.getNewLogsByRoute(db, req.params.route_id, since);
  } else {
    logs = model.getLogsByRoute(db, req.params.route_id);
  }

  const lastId = model.getMostRecentLogIdByRoute(db, req.params.route_id);

  console.log(since, logs, lastId)
  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/logs", {
        logs: logs,
        structId: req.params.structure_id,
        routeId: req.params.route_id,
        since: lastId,
      }),
    ),
  );
});

// POST route to handle file upload
app.post("/workshop/:structure_id/files", (req, res) => {
  if (!req.files || Object.keys(req.files).length === 0) {
    return res.status(400).send("failed to upload that file");
  }

  const { structure_id } = req.params;
  const file = req.files.file;
  const name = file.name;
  const [mime_type, mime_subtype] = file.mimetype.split("/");
  const uploadPath = path.join(__dirname, "public", structure_id);
  const storedPath = path.join(structure_id, file.name);

  fs.mkdirSync(uploadPath, { recursive: true });

  file.mv(path.join(uploadPath, name), (err) => {
    try {
      if (err) {
        return res.status(500).send(err);
      }

      let id = model.createFile(
        db,
        structure_id,
        name,
        storedPath,
        mime_type,
        mime_subtype,
      );

      let file = model.getFile(db, id);
      file.url = prefixUrlWithHost(req, file.path);

      return res.send(eta.render("workshop/file_detail", { file: file }));
    } catch (e) {
      res.status(500);
      return res.send(e);
    }
  });
});

function prefixUrlWithHost(req, path) {
  return req.protocol + "://" + req.get("host") + "/" + path;
}

// POST route to handle file upload
app.get("/workshop/:structure_id/files", (req, res) => {
  const { structure_id } = req.params;

  const files = model.getFilesForStruct(db, structure_id);
  files.map((it) => {
    it.url = prefixUrlWithHost(req, it.path);
  });

  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/files", {
        files,
        ...sidebarStuff(db, structure_id),
      }),
    ),
  );
});

app.get("/workshop/:structure_id/settings", (req, res) => {
  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/settings", {
        ...sidebarStuff(db, req.params.structure_id),
      }),
    ),
  );
});

app.put("/workshop/:structure_id/settings", (req, res) => {
  let structId = req.params.structure_id;
  let struct = model.getStructure(db, structId);
  let routePrefix = req.body.route_prefix;

  if (routePrefix[0] != "/") {
    routePrefix = "/" + routePrefix;
  }
  if (routePrefix[routePrefix.length - 1] == "/") {
    routePrefix = routePrefix.substring(0, routePrefix.length - 1);
  }

  model.updateStruct(db, {
    ...struct,
    route_prefix: routePrefix,
    head_injection: req.body.head_injection,
  });
  struct = model.getStructure(db, structId);

  res.send("success!");
});

app.get("/workshop/:structure_id/new_template_modal", (req, res) => {
  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/new_template_modal", {
        structure: model.getStructure(db, req.params.structure_id),
      }),
    ),
  );
});

app.get("/workshop/:structure_id/new_route_modal", (req, res) => {
  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/new_route_modal", {
        structure: model.getStructure(db, req.params.structure_id),
      }),
    ),
  );
});

app.get("/workshop/:structure_id/new_db_modal", (req, res) => {
  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/new_db_modal", {
        structure: model.getStructure(db, req.params.structure_id),
      }),
    ),
  );
});

app.get("/workshop/:structure_id/clone_modal", (req, res) => {
  const structure = model.getStructure(db, req.params.structure_id);
  const dbs = model.getDbsForStructure(db, req.params.structure_id);

  return res.send(
    bootstrapTemplateWithHTMXetc(
      eta.render("workshop/clone_structure_modal", {
        structure,
        dbs,
        defaultRoutePrefix: path.join(structure.route_prefix || "", "clone"),
      }),
    ),
  );
});

function embedHTML(url) {
  return `<div hx-get="${url}" hx-trigger="load"></div>`;
}

app.all("*", async (req, res) => {
  const req_path = req.path;
  const verb = req.method;

  try {
    let routeMatch = null;

    for (let { matcher, id } of routes[verb]) {
      let matchFromRoute = matcher(req_path);
      if (matchFromRoute) {
        routeMatch = { params: matchFromRoute.params, id: id };
      }
    }

    if (routeMatch) {
      req.params = routeMatch.params;
      const route = db
        .prepare("SELECT * FROM routes WHERE id = ?")
        .get(routeMatch.id);

      const structure = model.getStructure(db, route.structure_id);
      const __urlPrefix = structure.route_prefix;

      try {
        // todo: only add req res to contexst when running the handler()
        // which means moving to runscript instead of runincontext for that
        let context = bootstrapContext(db, route.structure_id, route.id, {
          req,
          res,
          eta,
        });

        res.render = (template, context) => {
          context = context || {};
          context.route = function (url) {
            return __urlPrefix ? path.join(__urlPrefix, url) : url;
          };
          const eta = model.getTemplater(route.structure_id);
          res.send(
            bootstrapTemplateWithHTMXetc(
              eta.render(template, context),
              `/workshop/${route.structure_id}/route/${route.id}`,
              `/workshop/${route.structure_id}/clone_modal/`,
              verb == "GET" ? embedHTML(req.originalUrl) : null,
              structure.head_injection,
              req.headers["hx-request"],
            ),
          );
        };
        const handlerScript = new vm.Script(route.handler, { filename: `handler_${route.id}.js` });
        // Prepare the execution code that invokes `handler(req, res)` and awaits it
        const executionScript = new vm.Script(`handler(req, res); `, { filename: `execution_${route.id}.js` });
        await handlerScript.runInContext(context);
        const result = await executionScript.runInContext(context);
      } catch (e) {
        const error = e.stack ? `${e}\n\n${e.stack}` : `${e}`;
        model.createLog(db, structure.id, route.id, error, true);
        return res.status(500).send(error);
      }
    } else {
      res.status(404).json({ success: false, message: "Path not found" });
    }
  } catch (error) {
    console.error(error);
    res.status(500).json({ success: false, message: "Internal server error" });
  }
});

app.listen(PORT, () => {
  console.log(`Server is running on http://localhost:${PORT}`);
});