from flask import Flask, render_template, request, jsonify, redirect, url_for, flash
import os
import json
import threading
import time
from datetime import datetime, timedelta
from email_processor import EmailProcessor
from dotenv import load_dotenv
import sqlite3

load_dotenv()

app = Flask(__name__)
app.secret_key = os.getenv('SECRET_KEY', 'your-secret-key-here')

# Configuration file path
CONFIG_FILE = 'config.json'

def load_config():
    """Load configuration from JSON file"""
    if os.path.exists(CONFIG_FILE):
        with open(CONFIG_FILE, 'r') as f:
            return json.load(f)
    else:
        # Default configuration
        default_config = {
            'email_address': 'projects@manaknightdigital.com',
            'zoho_email': '',  # Will be set by user through frontend
            'zoho_app_password': '',  # Will be set by user through frontend
            'time_frames': [
                {'name': '1-24 hours', 'hours': 24, 'alert_level': 1},
                {'name': '24-48 hours', 'hours': 48, 'alert_level': 2},
                {'name': '48+ hours', 'hours': 72, 'alert_level': 3}
            ],
            'email_days_back': 7,
            'agency_domains': ['projects@manaknightdigital.com'],
            'auto_process': False,
            'auto_process_interval': 30  # minutes
        }
        save_config(default_config)
        return default_config

def save_config(config):
    """Save configuration to JSON file"""
    with open(CONFIG_FILE, 'w') as f:
        json.dump(config, f, indent=2)

def auto_process_emails():
    """Background function to automatically process emails"""
    while True:
        try:
            config = load_config()
            if config.get('auto_process', False):
                print(f"\n🔄 Auto-processing emails (interval: {config['auto_process_interval']} minutes)")
                processor = EmailProcessor(agency_domains=config['agency_domains'])
                result = processor.process_emails(
                    max_results=None, 
                    send_alerts=True,
                    days_back=config['email_days_back'],
                    time_frames=config['time_frames']
                )
                if result.get('status') == 'success':
                    print(f"✅ Auto-processing complete: {result.get('actionable_emails', 0)} actionable emails")
                else:
                    print(f"❌ Auto-processing failed: {result.get('error', 'Unknown error')}")
            else:
                print("⏸️ Auto-processing disabled")
            
            # Sleep for the configured interval
            interval_minutes = config.get('auto_process_interval', 30)
            time.sleep(interval_minutes * 60)
            
        except Exception as e:
            print(f"❌ Auto-processing error: {e}")
            time.sleep(60)  # Wait 1 minute before retrying

@app.route('/')
def index():
    """Main dashboard page"""
    config = load_config()
    return render_template('index.html', config=config)

@app.route('/settings')
def settings():
    """Settings page"""
    config = load_config()
    return render_template('settings.html', config=config)

@app.route('/update_settings', methods=['POST'])
def update_settings():
    """Update system settings"""
    try:
        config = load_config()
        
        # Update email address
        config['email_address'] = request.form.get('email_address', config['email_address'])
        
        # Update Zoho credentials
        config['zoho_email'] = request.form.get('zoho_email', config.get('zoho_email', ''))
        config['zoho_app_password'] = request.form.get('zoho_app_password', config.get('zoho_app_password', ''))
        
        # Update email days back
        config['email_days_back'] = int(request.form.get('email_days_back', 7))
        
        # Update agency domains
        agency_domains = request.form.get('agency_domains', '').split(',')
        config['agency_domains'] = [domain.strip() for domain in agency_domains if domain.strip()]
        
        # Update time frames
        time_frames = []
        frame_names = request.form.getlist('frame_name[]')
        frame_hours = request.form.getlist('frame_hours[]')
        frame_levels = request.form.getlist('frame_level[]')
        
        for i in range(len(frame_names)):
            if frame_names[i] and frame_hours[i] and frame_levels[i]:
                time_frames.append({
                    'name': frame_names[i],
                    'hours': int(frame_hours[i]),
                    'alert_level': int(frame_levels[i])
                })
        
        # Sort time frames by hours
        time_frames.sort(key=lambda x: x['hours'])
        config['time_frames'] = time_frames
        
        # Update auto processing settings
        config['auto_process'] = request.form.get('auto_process') == 'on'
        config['auto_process_interval'] = int(request.form.get('auto_process_interval', 30))
        
        save_config(config)
        flash('Settings updated successfully!', 'success')
        
    except Exception as e:
        flash(f'Error updating settings: {str(e)}', 'error')
    
    return redirect(url_for('settings'))

@app.route('/process_emails', methods=['POST'])
def process_emails():
    """Process emails and send alerts"""
    try:
        config = load_config()
        
        # Initialize processor with current settings
        processor = EmailProcessor(agency_domains=config['agency_domains'])
        
        # Process emails with configurable settings
        result = processor.process_emails(
            max_results=None, 
            send_alerts=True,
            days_back=config['email_days_back'],
            time_frames=config['time_frames']
        )
        
        if result.get('status') == 'success':
            return jsonify({
                'status': 'success',
                'message': 'Email processing completed successfully',
                'data': {
                    'total_emails': result.get('total_emails', 0),
                    'actionable_emails': result.get('actionable_emails', 0),
                    'sent_alerts': len(result.get('sent_alerts', []))
                }
            })
        else:
            return jsonify({
                'status': 'error',
                'message': result.get('error', 'Unknown error occurred')
            })
            
    except Exception as e:
        return jsonify({
            'status': 'error',
            'message': f'System error: {str(e)}'
        })

@app.route('/get_threads')
def get_threads():
    """Get current threads that need alerts"""
    try:
        config = load_config()
        processor = EmailProcessor(agency_domains=config['agency_domains'])
        
        alert_threads = processor.tracker.get_threads_needing_alerts(config['time_frames'])
        
        threads_data = []
        for thread in alert_threads:
            threads_data.append({
                'thread_id': thread.thread_id,
                'subject': thread.subject,
                'last_message': thread.last_external_message.strftime('%Y-%m-%d %H:%M'),
                'alert_level': thread.alert_level,
                'hours_since': int((datetime.now() - thread.last_external_message).total_seconds() / 3600)
            })
        
        return jsonify({
            'status': 'success',
            'threads': threads_data
        })
        
    except Exception as e:
        return jsonify({
            'status': 'error',
            'message': f'Error fetching threads: {str(e)}'
        })

@app.route('/test_connection')
def test_connection():
    """Test email connection"""
    try:
        config = load_config()
        processor = EmailProcessor(agency_domains=config['agency_domains'])
        
        # Test connection by fetching a small number of emails
        emails = processor.zoho_client.fetch_emails(max_results=5, days_back=config['email_days_back'])
        
        return jsonify({
            'status': 'success',
            'message': f'Connection successful! Found {len(emails)} emails in the last {config["email_days_back"]} days.',
            'email_count': len(emails)
        })
        
    except Exception as e:
        return jsonify({
            'status': 'error',
            'message': f'Connection failed: {str(e)}'
        })

if __name__ == '__main__':
    # Start auto-processing thread
    auto_thread = threading.Thread(target=auto_process_emails, daemon=True)
    auto_thread.start()
    print("🔄 Auto-processing thread started")
    
    app.run(debug=True, host='0.0.0.0', port=5000)