"""
RSS Feed management routes
"""
from flask import Blueprint, request, jsonify
from datetime import datetime
from database import rss_feeds_collection

rss_bp = Blueprint('rss', __name__)


@rss_bp.route('/api/rss-feeds', methods=['GET'])
def get_rss_feeds():
    """Get all RSS feeds"""
    try:
        feeds = list(rss_feeds_collection.find(
            {},
            {'_id': 0}
        ).sort('name', 1))
        
        # Convert datetime to ISO format
        for feed in feeds:
            if 'created_at' in feed:
                feed['created_at'] = feed['created_at'].isoformat()
        
        return jsonify({
            'feeds': feeds,
            'total': len(feeds)
        }), 200
        
    except Exception as e:
        return jsonify({'error': str(e)}), 500


@rss_bp.route('/api/rss-feeds', methods=['POST'])
def add_rss_feed():
    """Add a new RSS feed"""
    try:
        data = request.get_json()
        
        # Validate required fields
        if not data.get('name'):
            return jsonify({'error': 'Feed name is required'}), 400
        if not data.get('url'):
            return jsonify({'error': 'Feed URL is required'}), 400
        if not data.get('category'):
            return jsonify({'error': 'Category is required'}), 400
        
        # Category validation - accept any string, but recommend common ones
        category = data['category'].strip().lower()
        if not category:
            return jsonify({'error': 'Category cannot be empty'}), 400
        
        data['category'] = category  # Normalize to lowercase
        
        # Check if feed already exists
        existing = rss_feeds_collection.find_one({'url': data['url']})
        if existing:
            return jsonify({'error': 'Feed URL already exists'}), 400
        
        # Create feed document
        feed_doc = {
            'name': data['name'].strip(),
            'url': data['url'].strip(),
            'category': data['category'],
            'active': data.get('active', True),
            'created_at': datetime.utcnow()
        }
        
        rss_feeds_collection.insert_one(feed_doc)
        
        return jsonify({
            'message': 'RSS feed added successfully',
            'feed': {
                'name': feed_doc['name'],
                'url': feed_doc['url'],
                'category': feed_doc['category'],
                'active': feed_doc['active']
            }
        }), 201
        
    except Exception as e:
        return jsonify({'error': str(e)}), 500


@rss_bp.route('/api/rss-feeds/<feed_name>', methods=['PUT'])
def update_rss_feed(feed_name):
    """Update an RSS feed"""
    try:
        data = request.get_json()
        
        # Build update document
        update_doc = {}
        if 'url' in data:
            update_doc['url'] = data['url'].strip()
        if 'category' in data:
            category = data['category'].strip().lower()
            if not category:
                return jsonify({'error': 'Category cannot be empty'}), 400
            update_doc['category'] = category
        if 'active' in data:
            update_doc['active'] = bool(data['active'])
        
        if not update_doc:
            return jsonify({'error': 'No fields to update'}), 400
        
        result = rss_feeds_collection.update_one(
            {'name': feed_name},
            {'$set': update_doc}
        )
        
        if result.matched_count > 0:
            return jsonify({'message': 'RSS feed updated successfully'}), 200
        else:
            return jsonify({'error': 'Feed not found'}), 404
            
    except Exception as e:
        return jsonify({'error': str(e)}), 500


@rss_bp.route('/api/rss-feeds/<feed_name>', methods=['DELETE'])
def delete_rss_feed(feed_name):
    """Delete an RSS feed"""
    try:
        result = rss_feeds_collection.delete_one({'name': feed_name})
        
        if result.deleted_count > 0:
            return jsonify({'message': f'RSS feed "{feed_name}" deleted successfully'}), 200
        else:
            return jsonify({'error': 'Feed not found'}), 404
            
    except Exception as e:
        return jsonify({'error': str(e)}), 500



@rss_bp.route('/api/rss-feeds/export', methods=['GET'])
def export_rss_feeds():
    """Export all RSS feeds as JSON"""
    try:
        feeds = list(rss_feeds_collection.find(
            {},
            {'_id': 0}
        ).sort('name', 1))
        
        # Convert datetime to ISO format
        for feed in feeds:
            if 'created_at' in feed:
                feed['created_at'] = feed['created_at'].isoformat()
        
        return jsonify({
            'feeds': feeds,
            'total': len(feeds),
            'exported_at': datetime.utcnow().isoformat()
        }), 200
        
    except Exception as e:
        return jsonify({'error': str(e)}), 500


@rss_bp.route('/api/rss-feeds/import', methods=['POST'])
def import_rss_feeds():
    """Import RSS feeds from JSON"""
    try:
        data = request.get_json()
        
        if not data or 'feeds' not in data:
            return jsonify({'error': 'Invalid import data. Expected {feeds: [...]}'}), 400
        
        feeds = data['feeds']
        
        if not isinstance(feeds, list):
            return jsonify({'error': 'feeds must be an array'}), 400
        
        imported = 0
        skipped = 0
        errors = []
        
        for feed in feeds:
            try:
                # Validate required fields
                if not feed.get('name') or not feed.get('url') or not feed.get('category'):
                    errors.append(f"Skipped invalid feed: {feed.get('name', 'unknown')}")
                    skipped += 1
                    continue
                
                # Check if feed already exists
                existing = rss_feeds_collection.find_one({'url': feed['url']})
                if existing:
                    errors.append(f"Skipped duplicate: {feed['name']}")
                    skipped += 1
                    continue
                
                # Create feed document
                feed_doc = {
                    'name': feed['name'].strip(),
                    'url': feed['url'].strip(),
                    'category': feed['category'].strip().lower(),
                    'active': feed.get('active', True),
                    'created_at': datetime.utcnow()
                }
                
                rss_feeds_collection.insert_one(feed_doc)
                imported += 1
                
            except Exception as e:
                errors.append(f"Error importing {feed.get('name', 'unknown')}: {str(e)}")
                skipped += 1
        
        return jsonify({
            'message': f'Import complete: {imported} imported, {skipped} skipped',
            'imported': imported,
            'skipped': skipped,
            'errors': errors if errors else None
        }), 200
        
    except Exception as e:
        return jsonify({'error': str(e)}), 500