import express from 'express';
import axios from 'axios';
import dotenv from 'dotenv';

// Load environment variables
dotenv.config();

const API_URL = process.env.API_URL;
const INSTANCE_NAME = process.env.INSTANCE_NAME;
const API_KEY = process.env.API_KEY;
const WEBHOOK_URL = process.env.WEBHOOK_URL;
const COMMUNITY_ID = process.env.COMMUNITY_ID;

if (!API_URL || !INSTANCE_NAME || !API_KEY || !WEBHOOK_URL || !COMMUNITY_ID) {
  throw new Error('Required environment variables are not defined.');
}

// Store community and group information
const linkedGroups: Set<string> = new Set();

// Create an Express app
const app = express();
app.use(express.json());

// Fetch all groups and identify the community and linked groups
async function fetchGroups() {
  try {
    const response = await axios.get(`${API_URL}/group/fetchAllGroups/${INSTANCE_NAME}?getParticipants=false`, {
      headers: {
        apikey: API_KEY,
      },
    });

    console.log('API Response:', response.data); // Log the full response

    // Check if the response is an array of groups
    if (Array.isArray(response.data)) {
      for (const group of response.data) {
        if (group.id === COMMUNITY_ID) {
          // This is the community
          console.log(`Community ID: ${COMMUNITY_ID}`);
        } else if (group.linkedParent === COMMUNITY_ID) {
          // This is a group linked to the community
          linkedGroups.add(group.id);
          console.log(`Linked Group ID: ${group.id}`);
        }
      }
    } else {
      console.error('Unexpected response format:', response.data);
    }
  } catch (error) {
    console.error('Error fetching groups:', error.response ? error.response.data : error.message);
  }
}

// Add the bot to a new group
async function addBotToGroup(groupId: string) {
  try {
    await axios.post(`${API_URL}/group/invite`, {
      groupId,
      participants: ['your-bot-phone-number'], // Replace with your bot's phone number
    }, {
      headers: {
        'Content-Type': 'application/json',
        apikey: API_KEY,
      },
    });
    console.log(`Bot added to group: ${groupId}`);
  } catch (error) {
    console.error('Error adding bot to group:', error);
  }
}

// Webhook endpoint

app.post('/webhook', (req, res) => {
  const event = req.body;
  console.log('Received event:', JSON.stringify(event, null, 2)); // Log the full event

  // Handle the event
  if (event.event === 'messages.upsert') {
    const messageData = event.data;

    // Ignore messages sent by the bot itself
    // if (messageData.key.fromMe) {
    //   console.log('Ignoring message sent by the bot itself');
    //   return res.status(200).send('OK');
    // }

    // Handle the message
    handleMessage(messageData);
  } else if (event.event === 'group_create' && event.data.parentGroupId === COMMUNITY_ID) {
    // A new group was created in the community
    const groupId = event.data.groupId;
    linkedGroups.add(groupId);
    addBotToGroup(groupId);
  }

  res.status(200).send('OK');
});

// Handle incoming messages
function handleMessage(messageData: any) {
  // console.log('Incoming message data:', JSON.stringify(messageData, null, 2)); // Log the full message data

  const body = messageData.message?.conversation;
  const sender = messageData.key.remoteJid;
  const groupId = messageData.key.remoteJid; // Group ID for community messages

  // Check if the message is from a group linked to the community
  if (groupId && linkedGroups.has(groupId) && body) {
    // Parse the command
    if (body.startsWith('/tarea')) {
      // Remove the "/tarea" prefix and trim any extra spaces
      const command = body.replace('/tarea', '').trim();

      // Split the remaining command into action and arguments
      const [action, ...args] = command.split(' ');
      console.log('Parsed action:', action); // Log the action
      console.log('Parsed args:', args); // Log the arguments

      const description = args.join(' ');
      console.log('Description:', description); // Log the description

      // Extract assigned user (if any)
      const assignedUserMatch = description.match(/@\w+/);
      const assignedUser = assignedUserMatch ? assignedUserMatch[0] : null;

      // Extract due date (if any)
      const dueDateMatch = description.match(/\d{4}-\d{2}-\d{2}/);
      const dueDate = dueDateMatch ? dueDateMatch[0] : null;

      // Remove the assigned user and due date from the description
      const cleanDescription = description
        .replace(/@\w+/g, '') // Remove assigned user
        .replace(/\d{4}-\d{2}-\d{2}/g, '') // Remove due date
        .trim(); // Remove extra spaces

      if (action === 'nueva') {
        // If no user is assigned, default to the sender
        const finalAssignedUser = assignedUser || `@${sender.split('@')[0]}`;
        createTask(sender, cleanDescription, finalAssignedUser, dueDate);
      } else if (action === 'asignar') {
        const taskId = args[0];
        if (assignedUser) {
          assignTask(sender, taskId, assignedUser);
        } else {
          sendMessage(sender, 'Debes mencionar a un usuario para asignar la tarea. Ejemplo: /tarea asignar 1 @usuario');
        }
      } else if (action === 'completar') {
        const taskId = args[0];
        completeTask(sender, taskId);
      } else {
        sendMessage(sender, 'Acción no reconocida. Usa /tarea nueva, /tarea asignar, o /tarea completar.');
      }
    }
  }
}


// Create a new task
function createTask(sender: string, description: string, assignedUser?: string, dueDate?: string) {
  const task = {
    id: tasks.length + 1,
    description,
    assignedTo: assignedUser || null,
    dueDate: dueDate || null,
    completed: false,
  };
  tasks.push(task);
  sendMessage(sender, `Tarea creada: ${task.id} - ${task.description}${assignedUser ? ` asignada a ${assignedUser}` : ''}${dueDate ? ` para el ${dueDate}` : ''}`);
}

// Assign a task
function assignTask(sender: string, taskId: string, assignedUser: string) {
  const task = tasks.find((t) => t.id === parseInt(taskId));
  if (task) {
    task.assignedTo = assignedUser;
    sendMessage(sender, `Tarea ${taskId} asignada a ${assignedUser}`);
  } else {
    sendMessage(sender, `Tarea ${taskId} no encontrada`);
  }
}

// Mark a task as completed
function completeTask(sender: string, taskId: string) {
  const task = tasks.find((t) => t.id === parseInt(taskId));
  if (task) {
    task.completed = true;
    sendMessage(sender, `Tarea ${taskId} marcada como completada`);
  } else {
    sendMessage(sender, `Tarea ${taskId} no encontrada`);
  }
}

// Send a message
async function sendMessage(phone: string, message: string) {
  try {
    await axios.post(`${API_URL}/message/sendText/${INSTANCE_NAME}`, {
      number: phone,
      text: message,
    }, {
      headers: {
        'Content-Type': 'application/json',
        apikey: API_KEY,
      },
    });
  } catch (error) {
    console.error('Error sending message:', error);
  }
}

// In-memory task storage
const tasks: any[] = [];

// Start the webhook server
const PORT = 3000;
app.listen(PORT, () => {
  console.log(`Webhook server running on port ${PORT}`);
});

// Configure the webhook in Evolution API
async function configureWebhook() {
  try {
    const response = await axios.post(
      `${API_URL}/webhook/set/${INSTANCE_NAME}`,
      {
        webhook: {
          url: WEBHOOK_URL, // Use the environment variable
          enabled: true,
          webhook_by_events: true,
          webhook_base64: true,
          events: [
            'MESSAGES_UPSERT', // New or updated messages
            'GROUPS_UPSERT', // New or updated groups
            'GROUP_PARTICIPANTS_UPDATE', // Group participant changes
            'GROUP_UPDATE', // Group metadata changes (optional)
          ],
        },
      },
      {
        headers: {
          'Content-Type': 'application/json',
          apikey: API_KEY,
        },
      }
    );
    console.log('Webhook configured successfully:', response.data);
  } catch (error) {
    console.error('Error configuring webhook:', error.response ? error.response.data : error.message);
  }
}

// Fetch groups and configure the webhook when the bot starts
async function startBot() {
  await fetchGroups();
  await configureWebhook();
}

startBot();