"""
任务参数API
包含任务输入参数相关的API接口
"""
from typing import Dict, Any, List, Optional
from fastapi import APIRouter, HTTPException, Depends, Query, Path, Request
from pydantic import BaseModel, Field
from config.task_config import (
    TaskInputParamConfig,
    TaskInputParamType,
    SystemParamKey
)
from services.task_param_service import TaskParamService
from core.exceptions import TianfengTaskError
from api.models import (
    ApiResponse, TaskInputParamModel, TaskInputParamsUpdateRequest
)
import logging
import json

# 创建日志记录器
logger = logging.getLogger(__name__)

# 创建路由器
router = APIRouter(tags=["任务参数管理"])

# 创建服务实例
task_param_service = TaskParamService()

@router.get("/task/input-params/fields", response_model=ApiResponse)
async def get_task_param_types():
    """获取任务输入参数表单字段定义"""
    try:
        # 从配置中获取表单字段定义
        form_fields = TaskInputParamConfig.get_input_params_form_fields()
        
        return {
            "code": 200,
            "message": "获取任务输入参数表单字段定义成功",
            "data": {
                "form_fields": form_fields
            }
        }
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"获取任务输入参数表单字段定义失败: {str(e)}")

@router.get("/task/{task_id}/input-params", response_model=ApiResponse)
async def get_task_input_params(
    task_id: str = Path(..., description="任务ID"),
    instance_id: str = Query(None, description="任务实例ID，不传则使用最新实例")
):
    """
    获取任务输入参数配置
    
    返回任务输入参数的配置信息，包括系统默认参数和用户自定义参数
    """
    try:
        # 使用任务参数服务获取参数
        params, found_instance_id = task_param_service.get_task_input_params(task_id, instance_id)
        
        return {
            "code": 200,
            "message": "获取任务输入参数成功",
            "data": {
                "task_id": task_id,
                "instance_id": found_instance_id,
                "params": params
            }
        }
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"获取任务输入参数失败: {str(e)}")

def safe_process_default_value(param_dict: Dict[str, Any]) -> None:
    """
    安全处理参数的default_value值，确保其是JSON可序列化的
    
    Args:
        param_dict: 参数字典，将被原地修改
    """
    # 如果没有default_value键，不处理
    if "default_value" not in param_dict:
        return
        
    default_value = param_dict["default_value"]
    param_type = param_dict.get("param_type", "")
    
    # None值保持不变
    if default_value is None:
        return
        
    # 只对json和array类型做特殊处理
    if param_type not in ["json", "array"]:
        return
        
    # 如果已经是字符串，尝试解析为JSON对象
    if isinstance(default_value, str):
        try:
            param_dict["default_value"] = json.loads(default_value)
        except json.JSONDecodeError:
            # 解析失败保持原字符串
            pass

@router.post("/task/{task_id}/input-params", response_model=ApiResponse)
async def update_task_input_params(
    task_id: str = Path(..., description="任务ID"),
    request: List[TaskInputParamModel] = None,
    instance_id: str = Query(None, description="任务实例ID，不传则使用最新实例或创建新实例")
):
    """
    更新任务输入参数配置
    
    批量保存用户自定义的任务输入参数配置，只有点击"完成"按钮后才会生效
    
    请求示例:
    ```json
    [
        {
            "param_name": "robotId",
            "label": "机器人ID",
            "param_type": "string",
            "required": true,
            "default_value": "",
            "description": "执行任务的机器人ID"
        },
        {
            "param_name": "timeout",
            "label": "超时时间",
            "param_type": "integer",
            "required": false,
            "default_value": 3600,
            "description": "任务执行的超时时间（秒）"
        }
    ]
    ```
    """
    try:
        # 将Pydantic模型转换为字典列表，并安全处理default_value
        params = []
        for param in request:
            param_dict = param.dict(exclude_none=True)
            safe_process_default_value(param_dict)
            params.append(param_dict)
        
        # 使用任务参数服务更新参数
        updated_count, found_instance_id, has_changes = task_param_service.update_task_input_params(task_id, params, instance_id)
        
        # 根据是否有变动返回不同的消息
        message = "更新任务输入参数成功" if has_changes else "任务输入参数无变动"
        
        return {
            "code": 200,
            "message": message,
            "data": {
                "task_id": task_id,
                "instance_id": found_instance_id,
                "updated_params_count": updated_count,
                "has_changes": has_changes
            }
        }
    except ValueError as e:
        return {
            "code": 400,
            "message": str(e),
            "data": None
        }
    except Exception as e:
        import traceback
        error_detail = f"更新任务输入参数失败: {str(e)}\n{traceback.format_exc()}"
        raise HTTPException(status_code=500, detail=error_detail)