import json
import logging
from datetime import datetime
from utils.sql_utils import SQLUtils

class InspectionDAO:
    """检验项目配置和数据访问对象"""
    
    def __init__(self):
        """初始化数据访问对象"""
        self.db = SQLUtils('sqlite', database='db/jtDB.db')
    
    def __del__(self):
        """析构函数，确保数据库连接关闭"""
        if hasattr(self, 'db'):
            self.db.close()
    
    def get_all_inspection_configs(self, include_disabled=False):
        """获取所有检验项目配置
        
        Args:
            include_disabled: 是否包含禁用的项目
            
        Returns:
            list: 检验项目配置列表
        """
        try:
            if include_disabled:
                sql = """
                SELECT id, position, name, display_name, enabled, required, 
                       data_type, min_value, max_value, enum_values, unit, sort_order
                FROM inspection_config
                WHERE is_deleted = FALSE
                ORDER BY sort_order, position
                """
                params = ()
            else:
                sql = """
                SELECT id, position, name, display_name, enabled, required, 
                       data_type, min_value, max_value, enum_values, unit, sort_order
                FROM inspection_config
                WHERE is_deleted = FALSE AND enabled = TRUE
                ORDER BY sort_order, position
                """
                params = ()
            
            self.db.cursor.execute(sql, params)
            results = self.db.cursor.fetchall()
            
            configs = []
            for row in results:
                config = {
                    'id': row[0],
                    'position': row[1],
                    'name': row[2],
                    'display_name': row[3],
                    'enabled': bool(row[4]),
                    'required': bool(row[5]),
                    'data_type': row[6],
                    'min_value': row[7],
                    'max_value': row[8],
                    'enum_values': json.loads(row[9]) if row[9] else None,
                    'unit': row[10],
                    'sort_order': row[11]
                }
                configs.append(config)
            
            return configs
        except Exception as e:
            logging.error(f"获取检验项目配置失败: {str(e)}")
            return []
    
    def get_enabled_inspection_configs(self):
        """获取已启用的检验项目配置
        
        Returns:
            list: 已启用的检验项目配置列表
        """
        return self.get_all_inspection_configs(include_disabled=False)
    
    def get_inspection_config_by_position(self, position):
        """根据位置获取检验项目配置
        
        Args:
            position: 位置序号 (1-6)
            
        Returns:
            dict: 检验项目配置, 未找到则返回None
        """
        try:
            sql = """
            SELECT id, position, name, display_name, enabled, required, 
                   data_type, min_value, max_value, enum_values, unit, sort_order
            FROM inspection_config
            WHERE position = ? AND is_deleted = FALSE
            """
            params = (position,)
            
            self.db.cursor.execute(sql, params)
            row = self.db.cursor.fetchone()
            
            if row:
                config = {
                    'id': row[0],
                    'position': row[1],
                    'name': row[2],
                    'display_name': row[3],
                    'enabled': bool(row[4]),
                    'required': bool(row[5]),
                    'data_type': row[6],
                    'min_value': row[7],
                    'max_value': row[8],
                    'enum_values': json.loads(row[9]) if row[9] else None,
                    'unit': row[10],
                    'sort_order': row[11]
                }
                return config
            else:
                return None
        except Exception as e:
            logging.error(f"获取检验项目配置失败: {str(e)}")
            return None
    
    def update_inspection_config(self, config_id, data, username='system'):
        """更新检验项目配置
        
        Args:
            config_id: 配置ID
            data: 更新数据
            username: 操作用户
            
        Returns:
            bool: 更新是否成功
        """
        try:
            current_time = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
            
            # 构建更新SQL
            update_fields = []
            params = []
            
            # 可更新的字段
            allowed_fields = [
                'name', 'display_name', 'enabled', 'required', 
                'data_type', 'min_value', 'max_value', 'unit', 
                'sort_order', 'enum_values'
            ]
            
            for field in allowed_fields:
                if field in data:
                    # 特殊处理enum_values字段，确保存储为JSON字符串
                    if field == 'enum_values' and data[field] is not None:
                        if isinstance(data[field], list):
                            update_fields.append(f"{field} = ?")
                            params.append(json.dumps(data[field]))
                        elif isinstance(data[field], str):
                            # 如果已经是字符串，检查是否有效的JSON
                            try:
                                json.loads(data[field])
                                update_fields.append(f"{field} = ?")
                                params.append(data[field])
                            except:
                                logging.warning(f"无效的JSON: {data[field]}")
                                continue
                    else:
                        update_fields.append(f"{field} = ?")
                        params.append(data[field])
            
            # 添加更新时间和更新人
            update_fields.append("update_time = ?")
            params.append(current_time)
            update_fields.append("update_by = ?")
            params.append(username)
            
            # 添加配置ID到参数列表
            params.append(config_id)
            
            # 构建SQL
            sql = f"""
            UPDATE inspection_config
            SET {', '.join(update_fields)}
            WHERE id = ?
            """
            
            self.db.execute_update(sql, params)
            return True
        except Exception as e:
            logging.error(f"更新检验项目配置失败: {str(e)}")
            return False
    
    def toggle_inspection_config(self, position, enabled, username='system'):
        """启用或禁用检验项目配置
        
        Args:
            position: 位置序号 (1-6)
            enabled: 是否启用
            username: 操作用户
            
        Returns:
            bool: 操作是否成功
        """
        try:
            current_time = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
            
            sql = """
            UPDATE inspection_config
            SET enabled = ?, update_time = ?, update_by = ?
            WHERE position = ? AND is_deleted = FALSE
            """
            params = (enabled, current_time, username, position)
            
            self.db.execute_update(sql, params)
            return True
        except Exception as e:
            logging.error(f"更新检验项目启用状态失败: {str(e)}")
            return False
    
    def save_inspection_data(self, order_id, data, username='system'):
        """保存检验数据
        
        Args:
            order_id: 工程号
            data: 检验数据列表，格式: [{'position': 1, 'config_id': 1, 'value': '合格'}, ...]
            username: 操作用户
            
        Returns:
            bool: 保存是否成功
        """
        try:
            current_time = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
            
            self.db.begin_transaction()
            
            for item in data:
                position = item.get('position')
                config_id = item.get('config_id')
                value = item.get('value')
                status = item.get('status', 'pass')
                remark = item.get('remark', '')
                
                # 检查是否已存在该工程号和位置的记录
                check_sql = """
                SELECT id FROM inspection_data
                WHERE order_id = ? AND position = ? AND is_deleted = FALSE
                """
                check_params = (order_id, position)
                
                self.db.cursor.execute(check_sql, check_params)
                existing = self.db.cursor.fetchone()
                
                if existing:
                    # 更新已有记录
                    update_sql = """
                    UPDATE inspection_data
                    SET config_id = ?, value = ?, status = ?, remark = ?,
                        update_time = ?, update_by = ?
                    WHERE id = ?
                    """
                    update_params = (
                        config_id, value, status, remark,
                        current_time, username, existing[0]
                    )
                    self.db.cursor.execute(update_sql, update_params)
                else:
                    # 插入新记录
                    insert_sql = """
                    INSERT INTO inspection_data (
                        order_id, position, config_id, value, status, remark,
                        create_time, create_by, is_deleted
                    ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, FALSE)
                    """
                    insert_params = (
                        order_id, position, config_id, value, status, remark,
                        current_time, username
                    )
                    self.db.cursor.execute(insert_sql, insert_params)
            
            self.db.commit_transaction()
            return True
        except Exception as e:
            self.db.rollback_transaction()
            logging.error(f"保存检验数据失败: {str(e)}")
            return False
    def get_inspection_data_unfinished(self):
        """获取未完成的检验数据
        
        Returns:
            list: 未完成的检验数据列表
        """
        try:
            sql = """
            SELECT d.id, d.order_id, d.position, d.config_id, d.value, d.status, d.remark,
                   c.name, c.display_name, c.data_type, c.unit
            FROM inspection_data d
            JOIN inspection_config c ON d.config_id = c.id
            WHERE d.is_deleted = FALSE 
            AND order_id IN (SELECT distinct order_id FROM inspection_data WHERE status != 'pass')
            ORDER BY d.order_id, d.position
            """
            self.db.cursor.execute(sql)
            results = self.db.cursor.fetchall()
            
            data_list = []
            for row in results:
                data = {
                    'id': row[0],
                    'order_id': row[1],
                    'position': row[2],
                    'config_id': row[3],
                    'value': row[4],
                    'status': row[5],
                    'remark': row[6],
                    'name': row[7],
                    'display_name': row[8],
                    'data_type': row[9],
                    'unit': row[10]
                }
                data_list.append(data)
            
            return data_list
        except Exception as e:
            logging.error(f"获取未完成的检验数据失败: {str(e)}")
            return []
    def get_inspection_data_by_order(self, order_id):
        """根据工程号获取检验数据
        
        Args:
            order_id: 工程号
            
        Returns:
            list: 检验数据列表
        """
        try:
            sql = """
            SELECT d.id, d.position, d.config_id, d.value, d.status, d.remark,
                   c.name, c.display_name, c.data_type, c.unit
            FROM inspection_data d
            JOIN inspection_config c ON d.config_id = c.id
            WHERE d.order_id = ? AND d.is_deleted = FALSE
            ORDER BY d.position
            """
            params = (order_id,)
            
            self.db.cursor.execute(sql, params)
            results = self.db.cursor.fetchall()
            
            data_list = []
            for row in results:
                data = {
                    'id': row[0],
                    'position': row[1],
                    'config_id': row[2],
                    'value': row[3],
                    'status': row[4],
                    'remark': row[5],
                    'name': row[6],
                    'display_name': row[7],
                    'data_type': row[8],
                    'unit': row[9]
                }
                data_list.append(data)
            
            return data_list
        except Exception as e:
            logging.error(f"获取检验数据失败: {str(e)}")
            return []