// bot.js - Main IRC Bot with Plugin System

// ================================
// BOT CONFIGURATION - EDIT HERE
// ================================
const config = {
    server: 'irc.libera.chat',        // IRC server address
    port: 6667,                       // IRC server port (6667 for plain, 6697 for SSL)
    nick: 'cancerbot',                    // Bot's nickname
    channels: ['#bakedbeans'],              // Channels to join (add more like: ['#channel1', '#channel2'])
    commandPrefix: '!',               // Command prefix (e.g., !help, !ping)
    pluginsDir: './plugins'           // Directory containing plugin files
};

const net = require('net');
const fs = require('fs');
const path = require('path');

class IRCBot {
    constructor(config) {
        this.config = {
            server: config.server || 'irc.libera.chat',
            port: config.port || 6667,
            nick: config.nick || 'MyBot',
            channels: config.channels || ['#test'],
            commandPrefix: config.commandPrefix || '!',
            pluginsDir: config.pluginsDir || './plugins'
        };
        
        this.socket = null;
        this.plugins = new Map();
        this.commands = new Map();
        this.connected = false;
        
        this.loadPlugins();
    }
    
    connect() {
        console.log(`Connecting to ${this.config.server}:${this.config.port}`);
        
        this.socket = net.createConnection(this.config.port, this.config.server);
        
        this.socket.on('connect', () => {
            console.log('Connected to IRC server');
            this.send(`NICK ${this.config.nick}`);
            this.send(`USER ${this.config.nick} 0 * :${this.config.nick}`);
        });
        
        this.socket.on('data', (data) => {
            const lines = data.toString().split('\r\n');
            lines.forEach(line => {
                if (line.trim()) {
                    this.handleMessage(line);
                }
            });
        });
        
        this.socket.on('error', (err) => {
            console.error('Socket error:', err);
        });
        
        this.socket.on('close', () => {
            console.log('Connection closed');
            this.connected = false;
            // Reconnect after 5 seconds
            setTimeout(() => this.connect(), 5000);
        });
    }
    
    send(message) {
        if (this.socket && this.socket.writable) {
            console.log('→', message);
            this.socket.write(message + '\r\n');
        }
    }
    
    handleMessage(line) {
        console.log('←', line);
        
        // Handle PING
        if (line.startsWith('PING')) {
            this.send('PONG ' + line.substring(5));
            return;
        }
        
        // Handle successful connection
        if (line.includes('001')) {
            this.connected = true;
            console.log('Successfully connected and registered');
            // Join channels
            this.config.channels.forEach(channel => {
                this.send(`JOIN ${channel}`);
            });
            return;
        }
        
        // Parse IRC message
        const parsed = this.parseMessage(line);
        if (parsed) {
            this.handleParsedMessage(parsed);
        }
    }
    
    parseMessage(line) {
        // Basic IRC message parsing
        const match = line.match(/^:([^!]+)!([^@]+)@([^\s]+)\s+(\w+)\s+([^:]+):(.*)$/);
        if (match) {
            return {
                nick: match[1],
                user: match[2],
                host: match[3],
                command: match[4],
                target: match[5].trim(),
                message: match[6]
            };
        }
        return null;
    }
    
    handleParsedMessage(msg) {
        // Handle PRIVMSG (channel messages and private messages)
        if (msg.command === 'PRIVMSG') {
            const isChannel = msg.target.startsWith('#');
            const replyTo = isChannel ? msg.target : msg.nick;
            
            // Check if it's a command
            if (msg.message.startsWith(this.config.commandPrefix)) {
                const commandLine = msg.message.substring(this.config.commandPrefix.length);
                const [commandName, ...args] = commandLine.split(' ');
                
                this.executeCommand(commandName, {
                    nick: msg.nick,
                    user: msg.user,
                    host: msg.host,
                    channel: isChannel ? msg.target : null,
                    replyTo: replyTo,
                    args: args,
                    fullMessage: msg.message
                });
            }
            
            // Emit message event for plugins
            this.emit('message', {
                nick: msg.nick,
                user: msg.user,
                host: msg.host,
                target: msg.target,
                message: msg.message,
                isChannel: isChannel,
                replyTo: replyTo
            });
        }
    }
    
    executeCommand(commandName, context) {
        const command = this.commands.get(commandName);
        if (command) {
            try {
                command.execute(context, this);
            } catch (error) {
                console.error(`Error executing command ${commandName}:`, error);
                this.say(context.replyTo, `Error executing command: ${error.message}`);
            }
        }
    }
    
    loadPlugins() {
        if (!fs.existsSync(this.config.pluginsDir)) {
            fs.mkdirSync(this.config.pluginsDir, { recursive: true });
            console.log(`Created plugins directory: ${this.config.pluginsDir}`);
            return;
        }
        
        const pluginFiles = fs.readdirSync(this.config.pluginsDir)
            .filter(file => file.endsWith('.js'));
        
        pluginFiles.forEach(file => {
            this.loadPlugin(file);
        });
        
        console.log(`Loaded ${pluginFiles.length} plugins`);
    }
    
    loadPlugin(filename) {
        const filePath = path.join(this.config.pluginsDir, filename);
        
        try {
            // Clear require cache to allow reloading
            delete require.cache[require.resolve(filePath)];
            
            const plugin = require(filePath);
            
            if (typeof plugin.init === 'function') {
                plugin.init(this);
            }
            
            // Register commands
            if (plugin.commands) {
                plugin.commands.forEach(command => {
                    this.commands.set(command.name, command);
                    console.log(`Registered command: ${command.name}`);
                });
            }
            
            this.plugins.set(filename, plugin);
            console.log(`Loaded plugin: ${filename}`);
            
        } catch (error) {
            console.error(`Error loading plugin ${filename}:`, error);
        }
    }
    
    reloadPlugin(filename) {
        const plugin = this.plugins.get(filename);
        if (plugin) {
            // Unregister old commands
            if (plugin.commands) {
                plugin.commands.forEach(command => {
                    this.commands.delete(command.name);
                });
            }
            
            // Call cleanup if available
            if (typeof plugin.cleanup === 'function') {
                plugin.cleanup(this);
            }
            
            this.plugins.delete(filename);
        }
        
        // Load the plugin again
        this.loadPlugin(filename);
    }
    
    reloadAllPlugins() {
        // Clear all plugins and commands
        this.plugins.forEach((plugin, filename) => {
            if (typeof plugin.cleanup === 'function') {
                plugin.cleanup(this);
            }
        });
        
        this.plugins.clear();
        this.commands.clear();
        
        // Reload all plugins
        this.loadPlugins();
    }
    
    // Helper methods for plugins
    say(target, message) {
        this.send(`PRIVMSG ${target} :${message}`);
    }
    
    action(target, message) {
        this.send(`PRIVMSG ${target} :\x01ACTION ${message}\x01`);
    }
    
    notice(target, message) {
        this.send(`NOTICE ${target} :${message}`);
    }
    
    join(channel) {
        this.send(`JOIN ${channel}`);
    }
    
    part(channel, reason = '') {
        this.send(`PART ${channel} :${reason}`);
    }
    
    // Simple event system for plugins
    emit(event, data) {
        this.plugins.forEach(plugin => {
            if (typeof plugin[`on${event.charAt(0).toUpperCase() + event.slice(1)}`] === 'function') {
                try {
                    plugin[`on${event.charAt(0).toUpperCase() + event.slice(1)}`](data, this);
                } catch (error) {
                    console.error(`Error in plugin event handler:`, error);
                }
            }
        });
    }
}

// Create and start bot
const bot = new IRCBot(config);
bot.connect();

// Handle graceful shutdown
process.on('SIGINT', () => {
    console.log('\nShutting down bot...');
    if (bot.socket) {
        bot.send('QUIT :Bot shutting down');
        bot.socket.end();
    }
    process.exit(0);
});

module.exports = IRCBot;