"""
文章内容库管理 API
"""
from flask import Blueprint, request, jsonify
from models.database import db
from services.search_service import search_service

bp = Blueprint('articles', __name__, url_prefix='/api/articles')

@bp.route('', methods=['GET'])
def list_articles():
    """获取文章列表"""
    limit = request.args.get('limit', 100, type=int)
    offset = request.args.get('offset', 0, type=int)
    
    articles = db.get_all_articles(limit=limit, offset=offset)
    
    # 解析JSON字段
    for article in articles:
        article['product_names'] = __import__('json').loads(article.get('product_names', '[]'))
        article['keywords'] = __import__('json').loads(article.get('keywords', '[]'))
    
    return jsonify({
        'success': True,
        'articles': articles,
        'count': len(articles)
    })

@bp.route('/search', methods=['GET'])
def search_articles():
    """搜索文章"""
    keyword = request.args.get('q', '')
    category = request.args.get('category')
    
    if not keyword:
        return jsonify({'error': '请提供搜索关键词'}), 400
    
    articles = db.search_articles(keyword, category)
    
    # 解析JSON字段
    for article in articles:
        article['product_names'] = __import__('json').loads(article.get('product_names', '[]'))
        article['keywords'] = __import__('json').loads(article.get('keywords', '[]'))
    
    return jsonify({
        'success': True,
        'articles': articles,
        'count': len(articles)
    })

@bp.route('/<int:article_id>', methods=['GET'])
def get_article(article_id):
    """获取文章详情"""
    article = db.get_article_by_id(article_id)
    
    if not article:
        return jsonify({'error': '文章不存在'}), 404
    
    article['product_names'] = __import__('json').loads(article.get('product_names', '[]'))
    article['keywords'] = __import__('json').loads(article.get('keywords', '[]'))
    
    return jsonify({
        'success': True,
        'article': article
    })

@bp.route('', methods=['POST'])
def create_article():
    """创建文章（手动添加）"""
    data = request.get_json()
    
    required_fields = ['product_names', 'summary', 'content', 'source']
    for field in required_fields:
        if field not in data:
            return jsonify({'error': f'缺少必填字段: {field}'}), 400
    
    article_id = search_service.save_to_articles(
        product_names=data['product_names'],
        category=data.get('category'),
        keywords=data.get('keywords', []),
        summary=data['summary'],
        content=data['content'],
        source=data['source'],
        url=data.get('url')
    )
    
    return jsonify({
        'success': True,
        'article_id': article_id,
        'message': '文章创建成功'
    })

@bp.route('/<int:article_id>', methods=['DELETE'])
def delete_article(article_id):
    """删除文章"""
    success = db.delete_article(article_id)
    
    if success:
        return jsonify({
            'success': True,
            'message': '文章已删除'
        })
    else:
        return jsonify({'error': '文章不存在或删除失败'}), 404

@bp.route('/fetch', methods=['POST'])
def fetch_article():
    """从URL抓取文章"""
    data = request.get_json()
    url = data.get('url')
    
    if not url:
        return jsonify({'error': '请提供URL'}), 400
    
    result = search_service.fetch_url_content(url)
    
    if result:
        # 自动保存到内容库
        article_id = search_service.save_to_articles(
            product_names=data.get('product_names', [result['title']]),
            category=data.get('category'),
            keywords=data.get('keywords', []),
            summary=result.get('description', ''),
            content=result['content'],
            source=url,
            url=url
        )
        
        return jsonify({
            'success': True,
            'article_id': article_id,
            'data': result
        })
    else:
        return jsonify({'error': '抓取失败'}), 500

@bp.route('/internet-search', methods=['POST'])
def internet_search():
    """互联网搜索（浏览器方式）"""
    data = request.get_json()
    keyword = data.get('keyword', '')
    max_results = data.get('max_results', 10)
    engine = data.get('engine', 'bing_cn')  # 默认 Bing 中国
    use_cache = data.get('use_cache', True)  # 默认使用缓存
    cache_days = data.get('cache_days', 7)  # 默认缓存7天
    
    if not keyword:
        return jsonify({'error': '请提供搜索关键词'}), 400
    
    # 检查是否有缓存
    cached = None
    if use_cache:
        cached = db.get_search_cache(keyword, engine)
    
    if cached:
        return jsonify({
            'success': True,
            'keyword': keyword,
            'engine': engine,
            'results': cached['results'],
            'count': cached['count'],
            'cached': True,
            'cached_at': cached['cached_at'],
            'expires_at': cached['expires_at']
        })
    
    # 执行互联网搜索
    results = search_service.search_internet(keyword, max_results, engine, use_cache, cache_days)
    
    return jsonify({
        'success': True,
        'keyword': keyword,
        'engine': engine,
        'results': results,
        'count': len(results),
        'cached': False
    })

@bp.route('/internet-search-and-fetch', methods=['POST'])
def internet_search_and_fetch():
    """互联网搜索并抓取内容"""
    data = request.get_json()
    keyword = data.get('keyword', '')
    max_results = data.get('max_results', 5)
    category = data.get('category')
    
    if not keyword:
        return jsonify({'error': '请提供搜索关键词'}), 400
    
    # 执行互联网搜索
    results = search_service.search_internet(keyword, max_results)
    
    # 抓取每个结果的详细内容
    fetched_results = []
    for r in results:
        url = r.get('url')
        if url:
            content = search_service.fetch_url_content(url)
            if content:
                fetched_results.append({
                    'title': r['title'],
                    'url': url,
                    'source': r['source'],
                    'fetched_content': content
                })
    
    return jsonify({
        'success': True,
        'keyword': keyword,
        'results': fetched_results,
        'count': len(fetched_results)
    })

# ========== 失败URL管理 ==========

@bp.route('/failed-urls', methods=['GET'])
def get_failed_urls():
    """获取失败的URL列表"""
    limit = request.args.get('limit', 100, type=int)
    urls = db.get_failed_urls(limit=limit)
    return jsonify({
        'success': True,
        'urls': urls,
        'count': len(urls)
    })

@bp.route('/failed-urls', methods=['POST'])
def add_failed_url():
    """记录失败的URL"""
    data = request.get_json()
    url = data.get('url')
    title = data.get('title')
    error_message = data.get('error_message')
    source = data.get('source', 'search')
    
    if not url:
        return jsonify({'error': '请提供URL'}), 400
    
    url_id = db.add_failed_url(url, title, error_message, source)
    return jsonify({
        'success': True,
        'url_id': url_id,
        'message': '失败URL已记录'
    })

@bp.route('/failed-urls/count', methods=['GET'])
def get_failed_url_count():
    """获取失败URL数量"""
    count = db.get_failed_url_count()
    return jsonify({
        'success': True,
        'count': count
    })

@bp.route('/failed-urls/<int:url_id>', methods=['DELETE'])
def delete_failed_url(url_id):
    """删除失败URL记录"""
    success = db.delete_failed_url(url_id)
    if success:
        return jsonify({'success': True, 'message': '记录已删除'})
    else:
        return jsonify({'error': '记录不存在'}), 404

@bp.route('/failed-urls/clear', methods=['POST'])
def clear_failed_urls():
    """清空所有失败URL记录"""
    count = db.clear_failed_urls()
    return jsonify({
        'success': True,
        'message': f'已清空 {count} 条记录'
    })

@bp.route('/failed-urls/retry', methods=['POST'])
def retry_failed_url():
    """重试失败的URL"""
    data = request.get_json()
    url = data.get('url')
    
    if not url:
        return jsonify({'error': '请提供URL'}), 400
    
    # 尝试抓取
    result = search_service.fetch_url_content(url)
    
    if result and result.get('content'):
        # 成功，标记为已处理
        db.mark_url_success(url)
        return jsonify({
            'success': True,
            'message': '抓取成功',
            'data': result
        })
    else:
        # 仍然失败
        db.add_failed_url(url, error_message='重试失败')
        return jsonify({'error': '抓取仍然失败'}), 500