// server3.js - Premium Services API
import express from 'express';
import cors from 'cors';
import helmet from 'helmet';
import dotenv from 'dotenv';
import { open } from 'sqlite';
import sqlite3 from 'sqlite3';
import jwt from 'jsonwebtoken';
import path from 'path';
import { fileURLToPath } from 'url';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

dotenv.config({ path: path.resolve(__dirname, '..', '.env') });

const app = express();
const PORT = process.env.PREMIUM_PORT || 5002;

let db;
const initDB = async () => {
  try {
    db = await open({
      filename: '/home/jcoakley/aptiva-dev1-app/user_profile.db',
      driver: sqlite3.Database
    });
    console.log('Connected to user_profile.db for Premium Services.');
  } catch (error) {
    console.error('Error connecting to premium database:', error);
  }
};
initDB();

app.use(helmet());
app.use(express.json());

const allowedOrigins = ['https://dev1.aptivaai.com'];
app.use(cors({ origin: allowedOrigins, credentials: true }));

const authenticatePremiumUser = (req, res, next) => {
  const token = req.headers.authorization?.split(' ')[1];
  if (!token) return res.status(401).json({ error: 'Premium authorization required' });

  try {
    const { userId } = jwt.verify(token, process.env.SECRET_KEY);
    req.userId = userId;
    next();
  } catch (error) {
    return res.status(403).json({ error: 'Invalid or expired token' });
  }
};

// Get latest selected planned path
app.get('/api/premium/planned-path/latest', authenticatePremiumUser, async (req, res) => {
  try {
    const row = await db.get(
      `SELECT * FROM career_path WHERE user_id = ? ORDER BY start_date DESC LIMIT 1`,
      [req.userId]
    );
    res.json(row || {});
  } catch (error) {
    console.error('Error fetching latest career path:', error);
    res.status(500).json({ error: 'Failed to fetch latest planned path' });
  }
});

// Get all planned paths for the user
app.get('/api/premium/planned-path/all', authenticatePremiumUser, async (req, res) => {
  try {
    const rows = await db.all(
      `SELECT * FROM career_path WHERE user_id = ? ORDER BY start_date ASC`,
      [req.userId]
    );
    res.json({ careerPath: rows });
  } catch (error) {
    console.error('Error fetching career paths:', error);
    res.status(500).json({ error: 'Failed to fetch planned paths' });
  }
});

// Save a new planned path
app.post('/api/premium/planned-path', authenticatePremiumUser, async (req, res) => {
  const { job_title, projected_end_date } = req.body;

  if (!job_title) {
    return res.status(400).json({ error: 'Job title is required' });
  }

  try {
    await db.run(
      `INSERT INTO career_path (user_id, job_title, status, start_date, projected_end_date)
       VALUES (?, ?, 'Active', DATE('now'), ?)`,
      [req.userId, job_title, projected_end_date || null]
    );

    res.status(201).json({ message: 'Planned path added successfully' });
  } catch (error) {
    console.error('Error adding planned path:', error);
    res.status(500).json({ error: 'Failed to add planned path' });
  }
});

// Save a new milestone
app.post('/api/premium/milestones', authenticatePremiumUser, async (req, res) => {
  const { milestone_type, description, date, career_path_id, progress } = req.body;

  if (!milestone_type || !description || !date) {
    return res.status(400).json({ error: 'Missing required fields' });
  }

  try {
    await db.run(
      `INSERT INTO milestones (user_id, milestone_type, description, date, career_path_id, progress, created_at)
       VALUES (?, ?, ?, ?, ?, ?, CURRENT_TIMESTAMP)`,
      [req.userId, milestone_type, description, date, career_path_id, progress || 0]
    );
    res.status(201).json({ message: 'Milestone saved successfully' });
  } catch (error) {
    console.error('Error saving milestone:', error);
    res.status(500).json({ error: 'Failed to save milestone' });
  }
});

// Get all milestones
app.get('/api/premium/milestones', authenticatePremiumUser, async (req, res) => {
  try {
    const milestones = await db.all(
      `SELECT * FROM milestones WHERE user_id = ? ORDER BY date ASC`,
      [req.userId]
    );

    const mapped = milestones.map(m => ({
      id: m.id,
      title: m.description,
      date: m.date,
      type: m.milestone_type,
      progress: m.progress || 0,
      career_path_id: m.career_path_id
    }));

    res.json({ milestones: mapped });
  } catch (error) {
    console.error('Error fetching milestones:', error);
    res.status(500).json({ error: 'Failed to fetch milestones' });
  }
});

/// Update an existing milestone
app.put('/api/premium/milestones/:id', authenticatePremiumUser, async (req, res) => {
  const { id } = req.params;
  const { milestone_type, description, date, progress } = req.body;

  if (!milestone_type || !description || !date) {
    return res.status(400).json({ error: 'Missing required fields' });
  }

  try {
    await db.run(
      `UPDATE milestones SET milestone_type = ?, description = ?, date = ?, progress = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ? AND user_id = ?`,
      [milestone_type, description, date, progress || 0, id, req.userId]
    );
    res.status(200).json({ message: 'Milestone updated successfully' });
  } catch (error) {
    console.error('Error updating milestone:', error);
    res.status(500).json({ error: 'Failed to update milestone' });
  }
});

// Archive current career to history
app.post('/api/premium/career-history', authenticatePremiumUser, async (req, res) => {
  const { career_path_id, company } = req.body;

  if (!career_path_id || !company) {
    return res.status(400).json({ error: 'Career path ID and company are required' });
  }

  try {
    const career = await db.get(`SELECT * FROM career_path WHERE id = ? AND user_id = ?`, [career_path_id, req.userId]);

    if (!career) {
      return res.status(404).json({ error: 'Career path not found' });
    }

    await db.run(
      `INSERT INTO career_history (user_id, job_title, company, start_date)
       VALUES (?, ?, ?, DATE('now'))`,
      [req.userId, career.job_title, company]
    );

    await db.run(`DELETE FROM career_path WHERE id = ?`, [career_path_id]);

    res.status(201).json({ message: 'Career moved to history successfully' });
  } catch (error) {
    console.error('Error moving career to history:', error);
    res.status(500).json({ error: 'Failed to update career history' });
  }
});

// Retrieve career history
app.get('/api/premium/career-history', authenticatePremiumUser, async (req, res) => {
  try {
    const history = await db.all(
      `SELECT * FROM career_history WHERE user_id = ? ORDER BY start_date DESC;`,
      [req.userId]
    );

    res.json({ careerHistory: history });
  } catch (error) {
    console.error('Error fetching career history:', error);
    res.status(500).json({ error: 'Failed to fetch career history' });
  }
});

// ROI Analysis (placeholder logic)
app.get('/api/premium/roi-analysis', authenticatePremiumUser, async (req, res) => {
  try {
    const userCareer = await db.get(
      `SELECT * FROM career_path WHERE user_id = ? ORDER BY start_date DESC LIMIT 1`,
      [req.userId]
    );

    if (!userCareer) return res.status(404).json({ error: 'No planned path found for user' });

    const roi = {
      jobTitle: userCareer.job_title,
      salary: userCareer.salary,
      tuition: 50000,
      netGain: userCareer.salary - 50000
    };

    res.json(roi);
  } catch (error) {
    console.error('Error calculating ROI:', error);
    res.status(500).json({ error: 'Failed to calculate ROI' });
  }
});

app.listen(PORT, () => {
  console.log(`Premium server running on http://localhost:${PORT}`);
});