from sqlalchemy.orm import Session
from sqlalchemy import and_, or_
from typing import Optional, Any, List
from datetime import datetime
from app.models.admin import OperationLog
from app.models.log import LoginLog, APILog
from app.models.api_call_log import ApiCallLog
from app.models.user import User
import openpyxl
from io import BytesIO
import os

# API路径到模块的映射
MODULE_PATH_MAPPING = {
    '系统': ['/api/admin/logs', '/api/admin/auth', '/api/auth'],
    '用户管理': ['/api/admin/users'],
    '模型管理': ['/api/admin/models'],
    '系统配置': ['/api/admin/config'],
    '视频生成': ['/api/admin/review/videos', '/api/video'],
    '图片生成': ['/api/admin/review/pictures', '/api/image'],
    '数据统计': ['/api/admin/stats'],
    'AI对话': ['/api/llm', '/api/conversation'],
    '语音合成': ['/api/audio'],
    '模型广场': ['/api/models'],
    '用户': ['/api/user'],
}

class LogService:
    def __init__(self, db: Session):
        self.db = db
    
    def log_operation(
        self,
        admin_id: int,
        operation_type: str,
        module: str,
        target_id: str,
        detail: dict,
        ip_address: str
    ):
        """记录操作日志"""
        log = OperationLog(
            admin_id=admin_id,
            operation_type=operation_type,
            module=module,
            target_id=target_id,
            detail=detail,
            ip_address=ip_address
        )
        self.db.add(log)
        self.db.commit()
    
    def log_login(
        self,
        user_id: str,
        user_type: str,
        login_result: str,
        fail_reason: Optional[str] = None,
        ip_address: Optional[str] = None,
        user_agent: Optional[str] = None
    ):
        """记录登录日志"""
        log = LoginLog(
            user_id=user_id,
            user_type=user_type,
            login_result=login_result,
            fail_reason=fail_reason,
            ip_address=ip_address,
            user_agent=user_agent
        )
        self.db.add(log)
        self.db.commit()
    
    def log_api_call(
        self,
        user_id: Optional[str],
        api_path: str,
        request_method: str,
        request_params: dict,
        response_status: int,
        response_time: int
    ):
        """记录API调用日志"""
        masked_params = self._mask_sensitive_data(request_params)
        
        log = APILog(
            user_id=user_id,
            api_path=api_path,
            request_method=request_method,
            request_params=masked_params,
            response_status=response_status,
            response_time=response_time
        )
        self.db.add(log)
        self.db.commit()
    
    def get_operation_logs(
        self,
        start_date: Optional[str] = None,
        end_date: Optional[str] = None,
        operation_type: Optional[str] = None,
        admin_id: Optional[int] = None,
        keyword: Optional[str] = None,
        page: int = 1,
        size: int = 20
    ):
        """查询操作日志"""
        query = self.db.query(OperationLog)
        
        if start_date:
            query = query.filter(OperationLog.created_at >= start_date)
        if end_date:
            query = query.filter(OperationLog.created_at <= end_date)
        if operation_type:
            query = query.filter(OperationLog.operation_type == operation_type)
        if admin_id:
            query = query.filter(OperationLog.admin_id == admin_id)
        
        query = query.order_by(OperationLog.created_at.desc())
        
        total = query.count()
        offset = (page - 1) * size
        items = query.offset(offset).limit(size).all()
        
        return {
            "items": items,
            "total": total,
            "page": page,
            "size": size
        }
    
    def get_login_logs(
        self,
        start_date: Optional[str] = None,
        end_date: Optional[str] = None,
        user_type: Optional[str] = None,
        login_result: Optional[str] = None,
        page: int = 1,
        size: int = 20
    ):
        """查询登录日志"""
        query = self.db.query(LoginLog)
        
        if start_date:
            query = query.filter(LoginLog.created_at >= start_date)
        if end_date:
            query = query.filter(LoginLog.created_at <= end_date)
        if user_type:
            query = query.filter(LoginLog.user_type == user_type)
        if login_result:
            query = query.filter(LoginLog.login_result == login_result)
        
        query = query.order_by(LoginLog.created_at.desc())
        
        total = query.count()
        offset = (page - 1) * size
        logs = query.offset(offset).limit(size).all()
        
        items = [{
            "id": log.id,
            "user_id": log.user_id,
            "username": log.username,
            "user_type": log.user_type,
            "login_result": log.login_result,
            "fail_reason": log.fail_reason,
            "ip_address": log.ip_address,
            "user_agent": log.user_agent,
            "created_at": log.created_at.isoformat() if log.created_at else None
        } for log in logs]
        
        return {
            "items": items,
            "total": total,
            "page": page,
            "size": size
        }
    
    def _get_module_from_path(self, api_path: str) -> str:
        """根据API路径获取模块名称"""
        for module, paths in MODULE_PATH_MAPPING.items():
            for path in paths:
                if path in api_path:
                    return module
        return '其他'
    
    def _get_paths_for_module(self, module: str) -> List[str]:
        """根据模块名称获取对应的API路径列表"""
        return MODULE_PATH_MAPPING.get(module, [])

    def get_api_logs(
        self,
        start_date: Optional[str] = None,
        end_date: Optional[str] = None,
        user_id: Optional[str] = None,
        username: Optional[str] = None,
        phone: Optional[str] = None,
        module: Optional[str] = None,
        api_path: Optional[str] = None,
        page: int = 1,
        size: int = 20
    ):
        """查询API日志，支持按用户名、电话、模块筛选"""
        # 如果选择开放平台模块，查询api_call_log表
        if module == '开放平台':
            return self._get_platform_api_logs(
                start_date=start_date,
                end_date=end_date,
                user_id=user_id,
                username=username,
                phone=phone,
                page=page,
                size=size
            )
        
        query = self.db.query(APILog)
        
        if start_date:
            query = query.filter(APILog.created_at >= start_date)
        if end_date:
            query = query.filter(APILog.created_at <= end_date)
        if user_id:
            query = query.filter(APILog.user_id == user_id)
        if api_path:
            query = query.filter(APILog.api_path.like(f"%{api_path}%"))
        
        # 按用户名筛选 - 需要关联用户表
        if username:
            user_ids = self.db.query(User.id).filter(
                User.username.ilike(f"%{username}%")
            ).all()
            user_id_list = [u[0] for u in user_ids]
            if user_id_list:
                query = query.filter(APILog.user_id.in_(user_id_list))
            else:
                # 没有匹配的用户，返回空结果
                return {"items": [], "total": 0, "page": page, "size": size}
        
        # 按电话号码筛选
        if phone:
            user_ids = self.db.query(User.id).filter(
                User.phone.ilike(f"%{phone}%")
            ).all()
            user_id_list = [u[0] for u in user_ids]
            if user_id_list:
                query = query.filter(APILog.user_id.in_(user_id_list))
            else:
                return {"items": [], "total": 0, "page": page, "size": size}
        
        # 按模块筛选
        if module:
            module_paths = self._get_paths_for_module(module)
            if module_paths:
                path_filters = [APILog.api_path.like(f"%{p}%") for p in module_paths]
                query = query.filter(or_(*path_filters))
        
        query = query.order_by(APILog.created_at.desc())
        
        total = query.count()
        offset = (page - 1) * size
        logs = query.offset(offset).limit(size).all()
        
        # 批量获取用户信息
        user_ids = list(set([log.user_id for log in logs if log.user_id]))
        user_map = {}
        if user_ids:
            users = self.db.query(User).filter(User.id.in_(user_ids)).all()
            user_map = {u.id: u for u in users}
        
        items = []
        for log in logs:
            user = user_map.get(log.user_id) if log.user_id else None
            items.append({
                "id": log.id,
                "user_id": log.user_id,
                "username": user.username if user else log.username,
                "phone": user.phone if user else None,
                "api_path": log.api_path,
                "module": self._get_module_from_path(log.api_path),
                "request_method": log.request_method,
                "request_params": log.request_params,
                "response_status": log.response_status,
                "response_time": log.response_time,
                "created_at": log.created_at.isoformat() if log.created_at else None
            })
        
        return {
            "items": items,
            "total": total,
            "page": page,
            "size": size
        }
    
    def _get_platform_api_logs(
        self,
        start_date: Optional[str] = None,
        end_date: Optional[str] = None,
        user_id: Optional[str] = None,
        username: Optional[str] = None,
        phone: Optional[str] = None,
        page: int = 1,
        size: int = 20
    ):
        """查询开放平台API调用日志"""
        query = self.db.query(ApiCallLog)
        
        if start_date:
            query = query.filter(ApiCallLog.created_at >= start_date)
        if end_date:
            query = query.filter(ApiCallLog.created_at <= end_date)
        if user_id:
            query = query.filter(ApiCallLog.user_id == user_id)
        
        # 按用户名筛选
        if username:
            user_ids = self.db.query(User.id).filter(
                User.username.ilike(f"%{username}%")
            ).all()
            user_id_list = [u[0] for u in user_ids]
            if user_id_list:
                query = query.filter(ApiCallLog.user_id.in_(user_id_list))
            else:
                return {"items": [], "total": 0, "page": page, "size": size}
        
        # 按电话号码筛选
        if phone:
            user_ids = self.db.query(User.id).filter(
                User.phone.ilike(f"%{phone}%")
            ).all()
            user_id_list = [u[0] for u in user_ids]
            if user_id_list:
                query = query.filter(ApiCallLog.user_id.in_(user_id_list))
            else:
                return {"items": [], "total": 0, "page": page, "size": size}
        
        query = query.order_by(ApiCallLog.created_at.desc())
        
        total = query.count()
        offset = (page - 1) * size
        logs = query.offset(offset).limit(size).all()
        
        # 批量获取用户信息
        user_ids_list = list(set([log.user_id for log in logs if log.user_id]))
        user_map = {}
        if user_ids_list:
            users = self.db.query(User).filter(User.id.in_(user_ids_list)).all()
            user_map = {u.id: u for u in users}
        
        items = []
        for log in logs:
            user = user_map.get(log.user_id)
            items.append({
                "id": log.id,
                "user_id": log.user_id,
                "username": user.username if user else None,
                "phone": user.phone if user else None,
                "api_path": f"/v1/chat/completions ({log.model_name})",
                "module": "开放平台",
                "request_method": "POST",
                "request_params": None,
                "response_status": 200 if log.status == "success" else 500,
                "response_time": None,
                "model_name": log.model_name,
                "input_tokens": log.input_tokens,
                "output_tokens": log.output_tokens,
                "bill": float(log.bill) if log.bill else 0,
                "status": log.status,
                "request_ip": log.request_ip,
                "created_at": log.created_at.isoformat() if log.created_at else None
            })
        
        return {
            "items": items,
            "total": total,
            "page": page,
            "size": size
        }
    
    def export_logs(self, log_type: str, filters: dict) -> str:
        """导出日志为Excel"""
        if log_type == "operation":
            data = self.get_operation_logs(**filters, page=1, size=10000)
        elif log_type == "login":
            data = self.get_login_logs(**filters, page=1, size=10000)
        elif log_type == "api":
            data = self.get_api_logs(**filters, page=1, size=10000)
        else:
            raise ValueError("不支持的日志类型")
        
        wb = openpyxl.Workbook()
        ws = wb.active
        
        if log_type == "operation":
            ws.append(["ID", "管理员ID", "操作类型", "模块", "目标ID", "IP地址", "创建时间"])
            for item in data["items"]:
                ws.append([
                    item.id if hasattr(item, 'id') else item.get('id'),
                    item.admin_id if hasattr(item, 'admin_id') else item.get('admin_id'),
                    item.operation_type if hasattr(item, 'operation_type') else item.get('operation_type'),
                    item.module if hasattr(item, 'module') else item.get('module'),
                    item.target_id if hasattr(item, 'target_id') else item.get('target_id'),
                    item.ip_address if hasattr(item, 'ip_address') else item.get('ip_address'),
                    str(item.created_at if hasattr(item, 'created_at') else item.get('created_at'))
                ])
        elif log_type == "login":
            ws.append(["ID", "用户ID", "用户类型", "登录结果", "失败原因", "IP地址", "创建时间"])
            for item in data["items"]:
                ws.append([
                    item.get('id'),
                    item.get('user_id'),
                    item.get('user_type'),
                    item.get('login_result'),
                    item.get('fail_reason') or "",
                    item.get('ip_address'),
                    item.get('created_at')
                ])
        elif log_type == "api":
            ws.append(["ID", "用户ID", "API路径", "请求方法", "响应状态", "响应时间", "创建时间"])
            for item in data["items"]:
                ws.append([
                    item.get('id'),
                    item.get('user_id') or "",
                    item.get('api_path'),
                    item.get('request_method'),
                    item.get('response_status'),
                    item.get('response_time'),
                    item.get('created_at')
                ])
        
        filename = f"{log_type}_logs_{datetime.now().strftime('%Y%m%d%H%M%S')}.xlsx"
        export_dir = os.path.join(os.path.expanduser("~"), "Downloads")
        os.makedirs(export_dir, exist_ok=True)
        filepath = os.path.join(export_dir, filename)
        wb.save(filepath)
        
        return filepath
    
    def _mask_sensitive_data(self, data: dict) -> dict:
        """脱敏处理敏感信息"""
        if not data:
            return data
        
        sensitive_keys = ['password', 'token', 'secret', 'key', 'api_key']
        masked_data = data.copy()
        
        for key in masked_data:
            if any(s in key.lower() for s in sensitive_keys):
                masked_data[key] = '***'
        
        return masked_data