require('dotenv').config();
const { Client, GatewayIntentBits, EmbedBuilder } = require('discord.js');
const sqlite3 = require('sqlite3').verbose();
const path = require('path');

const client = new Client({
  intents: [GatewayIntentBits.Guilds, GatewayIntentBits.GuildMessages],
});

const PRICE_CHECK_INTERVAL = 60000;
const PRICE_INCREASE_THRESHOLD = 2.5;
const DB_PATH = path.join(__dirname, 'data', 'solana.db');

const db = new sqlite3.Database(DB_PATH, (err) => {
  if (err) console.error('Database opening error: ', err);
  initializeDatabase();
});

function initializeDatabase() {
  db.serialize(() => {
    db.run(`CREATE TABLE IF NOT EXISTS price_history (
      id INTEGER PRIMARY KEY AUTOINCREMENT,
      timestamp INTEGER NOT NULL,
      price REAL NOT NULL
    )`);

    db.run(`CREATE TABLE IF NOT EXISTS bot_state (
      key TEXT PRIMARY KEY,
      value TEXT NOT NULL
    )`);

    db.run('CREATE INDEX IF NOT EXISTS idx_timestamp ON price_history(timestamp)');
  });
}

async function fetchSolanaPrice() {
  try {
    const fetch = (await import('node-fetch')).default;
    const response = await fetch('https://min-api.cryptocompare.com/data/price?fsym=SOL&tsyms=USD');
    if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
    const data = await response.json();
    return parseFloat(data.USD).toFixed(2);
  } catch (error) {
    console.error('Error fetching Solana price:', error);
    return null;
  }
}

function savePriceData(price) {
  return new Promise((resolve, reject) => {
    const timestamp = Date.now();
    db.run('INSERT INTO price_history (timestamp, price) VALUES (?, ?)',
      [timestamp, price],
      (err) => err ? reject(err) : resolve());
  });
}

function getLastAnnouncedPrice() {
  return new Promise((resolve, reject) => {
    db.get('SELECT value FROM bot_state WHERE key = "lastAnnouncedPrice"',
      (err, row) => {
        if (err) {
          console.error('Error getting last announced price:', err);
          resolve(null);
        } else {
          resolve(row ? parseFloat(row.value) : null);
        }
      });
  });
}

function updateLastAnnouncedPrice(price) {
  return new Promise((resolve, reject) => {
    db.run('INSERT OR REPLACE INTO bot_state (key, value) VALUES (?, ?)',
      ['lastAnnouncedPrice', price.toString()],
      (err) => {
        if (err) {
          console.error('Error updating last announced price:', err);
          resolve(false);
        } else {
          resolve(true);
        }
      });
  });
}

function getTimeBasedPrice(minutesAgo) {
  return new Promise((resolve) => {
    const timestamp = Date.now() - (minutesAgo * 60 * 1000);
    db.get(
      `SELECT price FROM price_history 
       WHERE timestamp <= ? 
       ORDER BY timestamp DESC LIMIT 1`,
      [timestamp],
      (err, row) => {
        if (err) {
          console.error(`Error getting price from ${minutesAgo} minutes ago:`, err);
          resolve(null);
        } else {
          resolve(row?.price || null);
        }
      }
    );
  });
}

async function calculateChanges(currentPrice) {
  try {
    const [oneMinAgo, fiveMinAgo, oneHourAgo, sixHourAgo, oneDayAgo] = await Promise.all([
      getTimeBasedPrice(1),
      getTimeBasedPrice(5),
      getTimeBasedPrice(60),
      getTimeBasedPrice(360),
      getTimeBasedPrice(1440)
    ]);

    const calculateChange = (oldPrice) => {
      if (!oldPrice) return { percent: 0, dollar: 0 };
      const dollarChange = currentPrice - oldPrice;
      const percentChange = (dollarChange / oldPrice) * 100;
      return { percent: percentChange, dollar: dollarChange };
    };

    return {
      oneMin: calculateChange(oneMinAgo),
      fiveMin: calculateChange(fiveMinAgo),
      oneHour: calculateChange(oneHourAgo),
      sixHour: calculateChange(sixHourAgo),
      oneDay: calculateChange(oneDayAgo)
    };
  } catch (error) {
    console.error('Error calculating changes:', error);
    return {
      oneMin: { percent: 0, dollar: 0 },
      fiveMin: { percent: 0, dollar: 0 },
      oneHour: { percent: 0, dollar: 0 },
      sixHour: { percent: 0, dollar: 0 },
      oneDay: { percent: 0, dollar: 0 }
    };
  }
}

async function createPriceEmbed(currentPrice, changes) {
  const randomColor = Math.floor(Math.random() * 16777215).toString(16).padStart(6, '0');

  return new EmbedBuilder()
    .setColor(`#${randomColor}`)
    .setThumbnail('https://solana.com/src/img/branding/solanaLogoMark.png')
    .setTitle('Solana (SOL) Price Update')
    .setURL('https://coinmarketcap.com/currencies/solana/')
    .setDescription(`**Current Price: \`$${currentPrice}\`**`)
    .addFields([
      { name: '💰 Current Price', value: `**\`$${currentPrice}\`**`, inline: false },
      { name: '1 Minute Change', value: `${changes.oneMin.percent.toFixed(2)}% (${changes.oneMin.dollar.toFixed(2)} USD)`, inline: true },
      { name: '5 Minute Change', value: `${changes.fiveMin.percent.toFixed(2)}% (${changes.fiveMin.dollar.toFixed(2)} USD)`, inline: true },
      { name: '1 Hour Change', value: `${changes.oneHour.percent.toFixed(2)}% (${changes.oneHour.dollar.toFixed(2)} USD)`, inline: true },
      { name: '6 Hour Change', value: `${changes.sixHour.percent.toFixed(2)}% (${changes.sixHour.dollar.toFixed(2)} USD)`, inline: true },
      { name: '1 Day Change', value: `${changes.oneDay.percent.toFixed(2)}% (${changes.oneDay.dollar.toFixed(2)} USD)`, inline: true }
    ])
    .setTimestamp()
    .setImage(process.env.IMAGE_URL);
}

async function getMessageId() {
  return new Promise((resolve) => {
    db.get('SELECT value FROM bot_state WHERE key = "priceMessageId"',
      (err, row) => {
        if (err) {
          console.error('Error getting message ID:', err);
          resolve(null);
        } else {
          resolve(row?.value || null);
        }
      });
  });
}

async function updateMessageId(messageId) {
  return new Promise((resolve) => {
    db.run('INSERT OR REPLACE INTO bot_state (key, value) VALUES (?, ?)',
      ['priceMessageId', messageId],
      err => {
        if (err) {
          console.error('Error updating message ID:', err);
          resolve(false);
        } else {
          resolve(true);
        }
      });
  });
}

async function updatePriceMessage(channel, currentPrice) {
  try {
    const changes = await calculateChanges(currentPrice);
    const embed = await createPriceEmbed(currentPrice, changes);
    let messageId = await getMessageId();
    let success = false;

    if (messageId) {
      try {
        const message = await channel.messages.fetch(messageId);
        await message.edit({ embeds: [embed] });
        success = true;
      } catch (error) {
        console.error('Failed to edit existing message:', error);
      }
    }

    if (!success) {
      try {
        const message = await channel.send({ embeds: [embed] });
        await updateMessageId(message.id);
      } catch (error) {
        console.error('Failed to send new message:', error);
        await new Promise(resolve => setTimeout(resolve, 5000));
        try {
          const message = await channel.send({ embeds: [embed] });
          await updateMessageId(message.id);
        } catch (retryError) {
          console.error('Failed to send message after retry:', retryError);
        }
      }
    }
  } catch (error) {
    console.error('Error in updatePriceMessage:', error);
  }
}

async function checkPriceAndAnnounce() {
  try {
    const currentPrice = await fetchSolanaPrice();
    if (!currentPrice) {
      setTimeout(checkPriceAndAnnounce, PRICE_CHECK_INTERVAL);
      return;
    }

    await savePriceData(currentPrice);
    const lastAnnouncedPrice = await getLastAnnouncedPrice();

    const priceChannel = await client.channels.fetch(process.env.SOLANA_PRICE_CHANNEL_ID);
    await updatePriceMessage(priceChannel, currentPrice);

    if (lastAnnouncedPrice && (parseFloat(currentPrice) - lastAnnouncedPrice >= PRICE_INCREASE_THRESHOLD)) {
      const announcementsChannel = await client.channels.fetch(process.env.ANNOUNCEMENTS_CHANNEL_ID);
      await announcementsChannel.send(
        `@everyone Solana price has increased significantly! Current price: $${currentPrice} (Up $${(parseFloat(currentPrice) - lastAnnouncedPrice).toFixed(2)} from last announcement)`
      );
      await updateLastAnnouncedPrice(parseFloat(currentPrice));
    }
  } catch (error) {
    console.error('Error in price check and announce cycle:', error);
  }

  setTimeout(checkPriceAndAnnounce, PRICE_CHECK_INTERVAL);
}

function cleanupOldData() {
  const oneDayAgo = Date.now() - (24 * 60 * 60 * 1000);
  db.run('DELETE FROM price_history WHERE timestamp < ?', [oneDayAgo], (err) => {
    if (err) console.error('Error cleaning up old data:', err);
  });
}

db.on('error', (err) => {
  console.error('Database error:', err);
});

client.once('ready', () => {
  console.log('Bot is online!');
  checkPriceAndAnnounce();
  setInterval(cleanupOldData, 6 * 60 * 60 * 1000);
});

client.on('error', error => {
  console.error('Discord client error:', error);
});

client.on('shardError', error => {
  console.error('Discord websocket error:', error);
});

process.on('unhandledRejection', error => {
  console.error('Unhandled promise rejection:', error);
});

client.login(process.env.DISCORD_BOT_TOKEN);