#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
产品管理接口
"""

from flask import Blueprint, request, jsonify
import logging
from datetime import datetime
from auth_utils import require_auth, AuthUtils
from database_config import get_db_manager
from log_utils import log_create, log_update, log_delete, log_error, log_operation

logger = logging.getLogger(__name__)

# 创建蓝图
product_bp = Blueprint('product', __name__, url_prefix='/api/products')

@product_bp.route('/list', methods=['GET'])
@require_auth
def get_products_list():
    """获取产品列表"""
    try:
        current_user = AuthUtils.get_current_user()
        enterprise_id = current_user.get('enterprise_id')
        
        if not enterprise_id:
            return jsonify({
                'code': 400,
                'message': '无法获取企业ID',
                'data': None
            }), 400
        
        # 获取查询参数
        page = int(request.args.get('page', 1))
        page_size = int(request.args.get('pageSize', 20))
        keyword = request.args.get('keyword', '').strip()
        type_id = request.args.get('type', '').strip()
        status = request.args.get('status', '').strip()
        
        # 构建查询条件
        where_conditions = ["enterprise_id = %s", "status != 'deleted'"]
        params = [enterprise_id]
        
        if keyword:
            where_conditions.append("name LIKE %s")
            params.append(f"%{keyword}%")
        
        if type_id:
            where_conditions.append("type_name LIKE %s")
            params.append(f"%{type_id}%")
        
        if status:
            where_conditions.append("status = %s")
            params.append(status)
        
        where_clause = " AND ".join(where_conditions)
        
        # 计算偏移量
        offset = (page - 1) * page_size
        
        db_manager = get_db_manager()
        
        # 查询总数
        count_sql = f"SELECT COUNT(*) as total FROM ai_products WHERE {where_clause}"
        count_result = db_manager.execute_query(count_sql, params)
        total = count_result[0]['total']
        
        # 查询产品列表
        sql = f"""
            SELECT p.id, p.name, p.type_name, p.knowledge, p.status,
                   p.articles_total, p.published_total,
                   p.image_url, p.image_thumbnail_url,
                   p.created_at, p.updated_at
            FROM ai_products p
            WHERE {where_clause}
            ORDER BY p.created_at DESC
            LIMIT %s OFFSET %s
        """
        params.extend([page_size, offset])
        products = db_manager.execute_query(sql, params)
        
        # 查询产品标签
        for product in products:
            tag_sql = """
                SELECT id, tag_name
                FROM ai_product_tags
                WHERE product_id = %s
            """
            tags = db_manager.execute_query(tag_sql, (product['id'],))
            product['tags'] = tags
        
        logger.info(f"获取产品列表成功，总数: {total}")
        
        return jsonify({
            'code': 200,
            'message': 'success',
            'data': {
                'total': total,
                'list': products
            },
            'timestamp': int(datetime.now().timestamp() * 1000)
        })
        
    except Exception as e:
        logger.error(f"[获取产品列表] 处理请求时发生错误: {str(e)}", exc_info=True)
        return jsonify({
            'code': 500,
            'message': '服务器内部错误',
            'data': None
        }), 500

@product_bp.route('/create', methods=['POST'])
@require_auth
def create_product():
    """创建产品"""
    try:
        current_user = AuthUtils.get_current_user()
        enterprise_id = current_user.get('enterprise_id')
        
        if not enterprise_id:
            return jsonify({
                'code': 400,
                'message': '无法获取企业ID',
                'data': None
            }), 400
        
        data = request.get_json()
        if not data:
            return jsonify({
                'code': 400,
                'message': '请求参数错误',
                'data': None
            }), 400
        
        # 验证必需字段
        required_fields = ['name', 'type_id', 'knowledge']
        for field in required_fields:
            if not data.get(field):
                return jsonify({
                    'code': 400,
                    'message': f'缺少必需字段: {field}',
                    'data': None
                }), 400
        
        db_manager = get_db_manager()
        
        # 创建产品
        sql = """
            INSERT INTO ai_products 
            (enterprise_id, name, type_name, knowledge, status, articles_total, published_total, image_url, image_thumbnail_url)
            VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s)
        """
        product_id = db_manager.execute_insert(sql, (
            enterprise_id,
            data['name'],
            data.get('type_name', data.get('type_id', '')),  # 兼容type_name和type_id
            data['knowledge'],
            'active',
            0, 0,  # articles_total, published_total
            data.get('image_url', ''),
            data.get('image_thumbnail_url', '')
        ))
        
        # 添加标签
        if data.get('tags'):
            for tag_name in data['tags']:
                tag_sql = "INSERT INTO ai_product_tags (enterprise_id, product_id, tag_name) VALUES (%s, %s, %s)"
                db_manager.execute_insert(tag_sql, (enterprise_id, product_id, tag_name))
        
        # 更新企业产品总数
        update_sql = "UPDATE ai_enterprises SET products_total = products_total + 1 WHERE id = %s"
        db_manager.execute_update(update_sql, (enterprise_id,))
        
        logger.info(f"创建产品成功: {data['name']}, ID: {product_id}")
        
        # 记录业务日志
        log_create(
            target_type='product',
            target_id=product_id,
            description=f"创建产品: {data['name']}",
            request_data=data,
            response_data={'id': product_id}
        )
        
        return jsonify({
            'code': 200,
            'message': '创建成功',
            'data': {'id': product_id},
            'timestamp': int(datetime.now().timestamp() * 1000)
        })
        
    except Exception as e:
        logger.error(f"[创建产品] 处理请求时发生错误: {str(e)}", exc_info=True)
        return jsonify({
            'code': 500,
            'message': '服务器内部错误',
            'data': None
        }), 500

@product_bp.route('/<int:product_id>', methods=['PUT'])
@require_auth
def update_product(product_id):
    """更新产品"""
    try:
        current_user = AuthUtils.get_current_user()
        enterprise_id = current_user.get('enterprise_id')
        
        if not enterprise_id:
            return jsonify({
                'code': 400,
                'message': '无法获取企业ID',
                'data': None
            }), 400
        
        data = request.get_json()
        if not data:
            return jsonify({
                'code': 400,
                'message': '请求参数错误',
                'data': None
            }), 400
        
        db_manager = get_db_manager()
        
        # 检查产品是否存在且属于当前企业
        check_sql = "SELECT id FROM ai_products WHERE id = %s AND enterprise_id = %s AND status != 'deleted'"
        existing = db_manager.execute_query(check_sql, (product_id, enterprise_id))
        
        if not existing:
            return jsonify({
                'code': 404,
                'message': '产品不存在',
                'data': None
            }), 404
        
        # 构建更新字段
        update_fields = []
        params = []
        
        if 'name' in data:
            update_fields.append("name = %s")
            params.append(data['name'])
        
        if 'type_name' in data or 'type_id' in data:
            update_fields.append("type_name = %s")
            params.append(data.get('type_name', data.get('type_id', '')))
        
        if 'knowledge' in data:
            update_fields.append("knowledge = %s")
            params.append(data['knowledge'])
        
        if update_fields:
            params.append(product_id)
            sql = f"UPDATE ai_products SET {', '.join(update_fields)}, updated_at = NOW() WHERE id = %s"
            db_manager.execute_update(sql, params)
        
        # 更新标签
        if 'tags' in data:
            # 删除旧标签
            del_sql = "DELETE FROM ai_product_tags WHERE product_id = %s"
            db_manager.execute_update(del_sql, (product_id,))
            
            # 添加新标签
            for tag_name in data['tags']:
                tag_sql = "INSERT INTO ai_product_tags (enterprise_id, product_id, tag_name) VALUES (%s, %s, %s)"
                db_manager.execute_insert(tag_sql, (enterprise_id, product_id, tag_name))
        
        logger.info(f"更新产品成功: ID {product_id}")
        
        # 记录业务日志
        log_update(
            target_type='product',
            target_id=product_id,
            description=f"更新产品信息",
            request_data=data
        )
        
        return jsonify({
            'code': 200,
            'message': '更新成功',
            'data': None,
            'timestamp': int(datetime.now().timestamp() * 1000)
        })
        
    except Exception as e:
        logger.error(f"[更新产品] 处理请求时发生错误: {str(e)}", exc_info=True)
        return jsonify({
            'code': 500,
            'message': '服务器内部错误',
            'data': None
        }), 500

@product_bp.route('/<int:product_id>', methods=['DELETE'])
@require_auth
def delete_product(product_id):
    """删除产品"""
    try:
        current_user = AuthUtils.get_current_user()
        enterprise_id = current_user.get('enterprise_id')
        
        if not enterprise_id:
            return jsonify({
                'code': 400,
                'message': '无法获取企业ID',
                'data': None
            }), 400
        
        db_manager = get_db_manager()
        
        # 检查产品是否存在且属于当前企业
        check_sql = "SELECT id, name FROM ai_products WHERE id = %s AND enterprise_id = %s AND status != 'deleted'"
        existing = db_manager.execute_query(check_sql, (product_id, enterprise_id))
        
        if not existing:
            return jsonify({
                'code': 404,
                'message': '产品不存在',
                'data': None
            }), 404
        
        # 软删除产品
        sql = "UPDATE ai_products SET status = 'deleted', updated_at = NOW() WHERE id = %s"
        db_manager.execute_update(sql, (product_id,))
        
        # 更新企业产品总数
        update_sql = "UPDATE ai_enterprises SET products_total = products_total - 1 WHERE id = %s"
        db_manager.execute_update(update_sql, (enterprise_id,))
        
        logger.info(f"删除产品成功: {existing[0]['name']}")
        
        # 记录业务日志
        log_delete(
            target_type='product',
            target_id=product_id,
            description=f"删除产品: {existing[0]['name']}"
        )
        
        return jsonify({
            'code': 200,
            'message': '删除成功',
            'data': None,
            'timestamp': int(datetime.now().timestamp() * 1000)
        })
        
    except Exception as e:
        logger.error(f"[删除产品] 处理请求时发生错误: {str(e)}", exc_info=True)
        return jsonify({
            'code': 500,
            'message': '服务器内部错误',
            'data': None
        }), 500

@product_bp.route('/<int:product_id>', methods=['GET'])
@require_auth
def get_product_detail(product_id):
    """获取产品详情"""
    try:
        current_user = AuthUtils.get_current_user()
        enterprise_id = current_user.get('enterprise_id')
        
        if not enterprise_id:
            return jsonify({
                'code': 400,
                'message': '无法获取企业ID',
                'data': None
            }), 400
        
        db_manager = get_db_manager()
        
        # 查询产品详情
        sql = """
            SELECT p.id, p.name, p.type_name, p.knowledge, p.status,
                   p.articles_total, p.published_total,
                   p.image_url, p.image_thumbnail_url,
                   p.created_at, p.updated_at
            FROM ai_products p
            WHERE p.id = %s AND p.enterprise_id = %s AND p.status != 'deleted'
        """
        result = db_manager.execute_query(sql, (product_id, enterprise_id))
        
        if not result:
            return jsonify({
                'code': 404,
                'message': '产品不存在',
                'data': None
            }), 404
        
        product = result[0]
        
        # 查询产品标签（直接从ai_product_tags查询）
        tag_sql = """
            SELECT id, tag_name
            FROM ai_product_tags
            WHERE product_id = %s
        """
        tags = db_manager.execute_query(tag_sql, (product_id,))
        product['tags'] = tags
        
        # 暂不查询产品图片（图片关联表结构不同）
        product['images'] = []
        
        logger.info(f"获取产品详情成功: ID {product_id}")
        
        return jsonify({
            'code': 200,
            'message': 'success',
            'data': product,
            'timestamp': int(datetime.now().timestamp() * 1000)
        })
        
    except Exception as e:
        logger.error(f"[获取产品详情] 处理请求时发生错误: {str(e)}", exc_info=True)
        return jsonify({
            'code': 500,
            'message': '服务器内部错误',
            'data': None
        }), 500