const express = require('express');
const fs = require('fs');
const path = require('path');
const auth = require('../middleware/auth');
const logger = require('../logger');

const router = express.Router();
const dataDir = '/data';

// Ensure the /data directory exists
if (!fs.existsSync(dataDir)) {
    fs.mkdirSync(dataDir, { recursive: true });
}

// Ensure the tags.json file exists
const tagsFilePath = path.join(dataDir, 'tags.json');
if (!fs.existsSync(tagsFilePath)) {
    fs.writeFileSync(tagsFilePath, JSON.stringify([]));
}

// Protect the /add-task endpoint with authentication
router.post('/add-task', auth, async (req, res) => {
    const { subject, description, scheduled } = req.body;
    const currentDateTime = new Date().toISOString().replace(/T/, ' ').replace(/\..+/, '');

    // Format the scheduled date and time for Org mode
    const scheduledDate = new Date(scheduled);
    const dayNames = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
    const dayName = dayNames[scheduledDate.getUTCDay()];

    let formattedScheduled;
    if (scheduledDate.getUTCHours() === 0 && scheduledDate.getUTCMinutes() === 0) {
        // No time provided, format without time
        formattedScheduled = `<${scheduledDate.getUTCFullYear()}-${String(scheduledDate.getUTCMonth() + 1).padStart(2, '0')}-${String(scheduledDate.getUTCDate()).padStart(2, '0')} ${dayName}>`;
    } else {
        // Time provided, format with time
        formattedScheduled = `<${scheduledDate.getUTCFullYear()}-${String(scheduledDate.getUTCMonth() + 1).padStart(2, '0')}-${String(scheduledDate.getUTCDate()).padStart(2, '0')} ${dayName} ${String(scheduledDate.getUTCHours()).padStart(2, '0')}:${String(scheduledDate.getUTCMinutes()).padStart(2, '0')}>`;
    }

    let orgFormattedData = `* TODO ${subject}
  SCHEDULED: ${formattedScheduled}
  :LOGBOOK:
  - State "TODO" from "TODO" [${currentDateTime}]
  :END:
`;

    if (description) {
        orgFormattedData = `* TODO ${subject}
  ${description}
  SCHEDULED: ${formattedScheduled}
  :LOGBOOK:
  - State "TODO" from "TODO" [${currentDateTime}]
  :END:
`;
        logger.info(`Task added: ${orgFormattedData}`);
    }

    const filePath = path.join(dataDir, 'tasks.org');
    try {
        await fs.promises.appendFile(filePath, orgFormattedData);
        res.json({ message: 'Task added successfully' });
    } catch (error) {
        logger.error('Error writing to tasks.org file:', error);
        res.status(500).json({ message: 'Error adding task' });
    }
});

// Endpoint to save tags
router.post('/save-tags', auth, async (req, res) => {
    const { tags } = req.body;
    const filePath = path.join(dataDir, 'tags.json');
    try {
        await fs.promises.writeFile(filePath, JSON.stringify(tags));
        res.send({ message: 'Tags saved successfully!' });
        logger.info(`New tags saved: ${tags}`);
    } catch (err) {
        logger.error('Error saving tags:', err);
        res.status(500).send('Error saving tags.');
    }
});

// Endpoint to retrieve tags
router.get('/get-tags', auth, async (req, res) => {
    const filePath = path.join(dataDir, 'tags.json');
    try {
        const data = await fs.promises.readFile(filePath, 'utf-8');
        const tags = JSON.parse(data);
        res.json(tags);
    } catch (err) {
        logger.error('Error retrieving tags:', err);
        res.status(500).json({ error: 'Error retrieving tags' });
    }
});

module.exports = router;