let serverRunning = false;

const fastify = require('fastify')({})
const cors = require('@fastify/cors');

//Load API KEYS
require('dotenv').config({ path: '../app/.env' });
const fmpAPIKey = process.env.FMP_API_KEY;
const mixpanelAPIKey =  process.env.MIXPANEL_API_KEY;
const twitchAPIKey =  process.env.TWITCH_API_KEY;
const twitchSecretKey =  process.env.TWITCH_SECRET_KEY;

const Mixpanel = require('mixpanel');
const UAParser = require('ua-parser-js');

const got = require('got'); //Only version npm i got@11.8.3 works with ESM 
const cheerio = require('cheerio');
const sharp = require('sharp');
const axios = require('axios');
const fs = require('fs');
const path = require('path');
const pino = require('pino');

const mixpanel = Mixpanel.init(mixpanelAPIKey, { debug: false });


const PocketBase = require('pocketbase/cjs')
const pb = new PocketBase('http://127.0.0.1:8090');

// globally disable auto cancellation
//See https://github.com/pocketbase/js-sdk#auto-cancellation
//Bug happens that get-post gives an error of auto-cancellation. Hence set it to false;
pb.autoCancellation(false);

const { serialize } = require('object-to-formdata');

// Register the CORS plugin
//Add Cors so that only localhost and my stocknear.com can send acceptable requests
fastify.register(cors);
const corsMiddleware = (request, reply, done) => {
const allowedOrigins = ['http://localhost:4173','http://127.0.0.1:4173','http://localhost:5173', 'http://127.0.0.1:5173', 'https://stocknear.com','https://www.stocknear.com', 'http://stocknear.com', 'http://www.stocknear.com'];

  const origin = request?.headers?.origin;
  if (!origin || allowedOrigins?.includes(origin)) {
      reply.header('Access-Control-Allow-Origin', origin || '*');
      reply.header('Access-Control-Allow-Methods', 'GET,POST');
      reply.header('Access-Control-Allow-Headers', 'Content-Type');
      done();
  } else {
      reply.code(403).send({ error: 'Forbidden' });
  }
};
fastify.addHook('onRequest', corsMiddleware);



fastify.register(require('./mixpanel/server'), { mixpanel, UAParser });
fastify.register(require('./get-user-stats/server'), { pb });
fastify.register(require('./get-community-stats/server'), { pb });
fastify.register(require('./get-moderators/server'), { pb });
fastify.register(require('./get-user-data/server'), { pb });
fastify.register(require('./get-all-comments/server'), { pb });
fastify.register(require('./get-post/server'), { pb });
fastify.register(require('./get-one-post/server'), { pb });
fastify.register(require('./update-watchlist/server'), { pb, serialize });
fastify.register(require('./get-portfolio-data/server'), { pb });
fastify.register(require('./create-portfolio/server'), { pb, serialize });
fastify.register(require('./buy-stock/server'), { pb });
fastify.register(require('./sell-stock/server'), { pb });
fastify.register(require('./create-post-link/server'), { got,cheerio,sharp });
fastify.register(require('./create-post-image/server'), { sharp });
fastify.register(require('./delete-comment/server'), { pb });
fastify.register(require('./delete-post/server'), { pb });
fastify.register(require('./leaderboard/server'), { pb });
fastify.register(require('./feedback/server'), { pb });
fastify.register(require('./create-watchlist/server'), { pb });
fastify.register(require('./delete-watchlist/server'), { pb });
fastify.register(require('./edit-name-watchlist/server'), { pb });
fastify.register(require('./all-watchlists/server'), { pb });
fastify.register(require('./get-notifications/server'), { pb });
fastify.register(require('./update-notifications/server'), { pb });
fastify.register(require('./create-strategy/server'), { pb });
fastify.register(require('./delete-strategy/server'), { pb });
fastify.register(require('./all-strategies/server'), { pb });
fastify.register(require('./save-strategy/server'), { pb });
fastify.register(require('./get-strategy/server'), { pb });
fastify.register(require('./get-twitch-status/server'), { axios,twitchAPIKey, twitchSecretKey });
fastify.register(require('./get-portfolio/server'), { pb });
fastify.register(require('./create-price-alert/server'), { pb });
fastify.register(require('./get-price-alert/server'), { pb, fs, path });
fastify.register(require('./delete-price-alert/server'), { pb });
fastify.register(require('./upvote/server'), { pb });
fastify.register(require('./downvote/server'), { pb });
fastify.register(require('./upvote-comment/server'), { pb });
fastify.register(require('./downvote-comment/server'), { pb });



//fastify.register(require('./create-comment/server'), { pb });


function wait(ms){
  var start = new Date().getTime();
  var end = start;
  while(end < start + ms) {
    end = new Date().getTime();
 }
}

fastify.register(require('@fastify/websocket'))

const WebSocket = require('ws');

let isSend = false;
let sendInterval;

fastify.register(async function (fastify) {
  fastify.get('/realtime-data', { websocket: true }, (connection, req) => {
    // Send a welcome message to the client

    //connection.socket.send('hi from server');

    // Listen for incoming messages from the client
    connection.socket.on('message', (message) => {
      symbol = message.toString('utf-8');
      console.log('Received message from client:', symbol);

      // If you want to dynamically update the subscription based on client's message
      updateSubscription();
    });

    //======================
    const login = {
      'event': 'login',
      'data': {
        'apiKey': fmpAPIKey,
      }
    }

    const subscribe = {
      'event': 'subscribe',
      'data': {
        'ticker': '', // Initial value; will be updated dynamically
      }
    }

    function updateSubscription() {
      subscribe.data.ticker = symbol;
    }


    // Create a new WebSocket instance for your backend
    const ws = new WebSocket('wss://websockets.financialmodelingprep.com');

    // Handle WebSocket connection open

    ws.on('open', function open() {
      ws.send(JSON.stringify(login));
      wait(2000);  //2 seconds in milliseconds
      ws.send(JSON.stringify(subscribe));
    });

    // Handle WebSocket errors
    ws.on('error', function (error) {
      console.error('WebSocket error:', error);
      // Handle the error gracefully, you might want to notify the client or log it.
      // For now, let's close the connection if an error occurs
      connection.socket.close();
    });



    // Handle WebSocket messages
    ws.on('message', function (data, flags) {
      const stringData = data.toString('utf-8');
      
      if (connection.socket.readyState === WebSocket.OPEN && !isSend) {
        connection.socket.send(stringData);
        //console.log(stringData)
        isSend = true
        setTimeout(() => { 
          isSend = false}, 1000);

        //wait(2000);
      }
      //wait(2000);
    });

    


    //======================

   // Handle client disconnect
    connection.socket.on('close', () => {
      console.log('Client disconnected');
      connection?.socket?.close();
      // Check if the WebSocket is open before trying to close it
      if (ws.readyState === WebSocket.OPEN) {
        try {
          ws.close();
        } catch (e) {
          console.error('Error while closing WebSocket:', e);
        }
      }
    });

    
  });
});


fastify.register(async function (fastify) {
  fastify.get('/realtime-crypto-data', { websocket: true }, (connection, req) => {
    // Send a welcome message to the client


    // Listen for incoming messages from the client
    connection.socket.on('message', (message) => {
      symbol = message.toString('utf-8');
      console.log('Received message from client:', symbol);

      // If you want to dynamically update the subscription based on client's message
      updateSubscription();
    });

    //======================
    const login = {
      'event': 'login',
      'data': {
        'apiKey': fmpAPIKey,
      }
    }

    const subscribe = {
      'event': 'subscribe',
      'data': {
        'ticker': '', // Initial value; will be updated dynamically
      }
    }

    function updateSubscription() {
      subscribe.data.ticker = symbol;
    }


    // Create a new WebSocket instance for your backend
    const ws = new WebSocket('wss://crypto.financialmodelingprep.com');

    // Handle WebSocket connection open

    ws.on('open', function open() {
      ws.send(JSON.stringify(login));
      wait(2000);  //2 seconds in milliseconds
      ws.send(JSON.stringify(subscribe));
    });

    // Handle WebSocket errors
    ws.on('error', function (error) {
      console.error('WebSocket error:', error);
      // Handle the error gracefully, you might want to notify the client or log it.
      // For now, let's close the connection if an error occurs
      connection.socket.close();
    });



    // Handle WebSocket messages
    ws.on('message', function (data, flags) {
      const stringData = data.toString('utf-8');
      
      if (connection.socket.readyState === WebSocket.OPEN && !isSend) {
        connection.socket.send(stringData);
        //console.log(stringData)
        isSend = true
        setTimeout(() => { 
          isSend = false}, 1000);

        //wait(2000);
      }
      //wait(2000);
    });

    


    //======================

   // Handle client disconnect
    connection.socket.on('close', () => {
      console.log('Client disconnected');
      connection?.socket?.close();
      // Check if the WebSocket is open before trying to close it
      if (ws.readyState === WebSocket.OPEN) {
        try {
          ws.close();
        } catch (e) {
          console.error('Error while closing WebSocket:', e);
        }
      }
    });

    
  });
});

fastify.register(async function (fastify) {
  fastify.get('/options-flow-reader', { websocket: true }, (connection, req) => {
    let jsonData;
    let sendInterval;

    // Function to send data to the client
    const sendData = async () => {
      const filePath = path.join(__dirname, '../app/json/options-flow/feed/data.json');
      try {
        if (fs.existsSync(filePath)) {
          const fileData = fs.readFileSync(filePath, 'utf8');
          jsonData = JSON.parse(fileData);
          connection.socket.send(JSON.stringify(jsonData));
        } else {
          console.error('File not found:', filePath);
          clearInterval(sendInterval);
          connection?.socket?.close();
          console.error('Connection closed')
          throw new Error('This is an intentional uncaught exception!');
        }
      } catch (err) {
        console.error('Error sending data to client:', err);
      }
    };

    // Send data to the client initially
    sendData();

    // Start sending data periodically
    sendInterval = setInterval(sendData, 5000);

    // Handle client disconnect
    connection.socket.on('close', () => {
      console.log('Client disconnected');
      clearInterval(sendInterval);
    });

    // Handle server crash cleanup
    const closeHandler = () => {
      console.log('Server is closing. Cleaning up resources...');
      clearInterval(sendInterval);
      connection.socket.close();
    };

    // Add close handler to process event
    process.on('exit', closeHandler);
    process.on('SIGINT', closeHandler);
    process.on('SIGTERM', closeHandler);
    process.on('uncaughtException', closeHandler);
    process.on('unhandledRejection', closeHandler);
  });
});


fastify.register(async function (fastify) {
  fastify.get('/options-zero-dte-reader', { websocket: true }, (connection, req) => {
    let jsonData;
    let sendInterval;

    // Function to send data to the client
    const sendData = async () => {
      const filePath = path.join(__dirname, '../app/json/options-flow/zero-dte/data.json');
      try {
        if (fs.existsSync(filePath)) {
          const fileData = fs.readFileSync(filePath, 'utf8');
          jsonData = JSON.parse(fileData);
          connection.socket.send(JSON.stringify(jsonData));
        } else {
          console.error('File not found:', filePath);
          clearInterval(sendInterval);
          console.error('Connection closed')
          throw new Error('This is an intentional uncaught exception!');
        }
      } catch (err) {
        console.error('Error sending data to client:', err);
      }
    };

    // Send data to the client initially
    sendData();

    // Start sending data periodically
    sendInterval = setInterval(sendData, 5000);

    // Handle client disconnect
    connection.socket.on('close', () => {
      console.log('Client disconnected');
      connection?.socket?.close();
      clearInterval(sendInterval);
    });

    // Handle server crash cleanup
    const closeHandler = () => {
      console.log('Server is closing. Cleaning up resources...');
      clearInterval(sendInterval);
      connection?.socket?.close();
    };

    // Add close handler to process event
    process.on('exit', closeHandler);
    process.on('SIGINT', closeHandler);
    process.on('SIGTERM', closeHandler);
    process.on('uncaughtException', closeHandler);
    process.on('unhandledRejection', closeHandler);
  });
});





// Function to start the server
function startServer() {
  if (!serverRunning) {
    fastify.listen(2000, (err) => {
      if (err) {
        console.error('Error starting server:', err);
        process.exit(1); // Exit the process if server start fails
      }
      serverRunning = true;
      console.log('Server started successfully on port 2000!');
    });
  } else {
    console.log('Server is already running.');
  }
}

// Function to stop the server
function stopServer() {
  if (serverRunning) {
    return new Promise((resolve, reject) => {
      fastify.close((err) => {
        if (err) {
          console.error('Error closing server:', err);
          reject(err);
        } else {
          serverRunning = false;
          console.log('Server closed successfully!');
          resolve();
        }
      });
    });
  } else {
    console.log('Server is not running.');
    return Promise.resolve();
  }
}

// Function to gracefully close and restart the server
function restartServer() {
  if (serverRunning) {
    stopServer().then(() => {
      console.log('Restarting server...');
      startServer();
    }).catch((error) => {
      console.error('Failed to restart server:', error);
      process.exit(1); // Exit the process if server restart fails
    });
  } else {
    console.log('Server is not running. Starting server...');
    startServer();
  }
}

// Add a global error handler for uncaught exceptions
process.on('uncaughtException', (err) => {
  console.error('Uncaught Exception:', err);
  restartServer();
});

// Add a global error handler for unhandled promise rejections
process.on('unhandledRejection', (reason, promise) => {
  console.error('Unhandled Rejection at:', promise, 'reason:', reason);
  restartServer();
});

// Start the server
startServer();