# app/schemas/task.py
import json
from pydantic import BaseModel, field_validator
from typing import Optional, Dict, Any, Literal, List
from datetime import datetime

class VasTaskBase(BaseModel):
    status: Optional[Literal['pending','grabbed','running','pause','cancelled','completed']] = None
    priority: Optional[int] = 10
    config: Optional[Dict[str, Any]] = None
    user_inputs: Optional[Dict[str, Any]] = None
    grabbed_history: Optional[Dict[str, Any]] = None
    meta: Optional[Dict[str, Any]] = None
    
    @field_validator("config", "user_inputs", "grabbed_history", "meta", mode="before")
    def normalize_json_field(cls, v):
        if v is None:
            return None
        if isinstance(v, str):
            try:
                return json.loads(v)
            except Exception:
                return {}
        return v

class VasTaskCreate(VasTaskBase):
    order_id: str
    routing_key: str
    script_version: Optional[str] = None
    expire_at: datetime
    
class VasTaskUpdate(VasTaskBase):
    pass

class VasTaskOut(VasTaskBase):
    id: int
    
    order_id: str
    routing_key: str
    script_version: Optional[str] = None
    
    attempt_count: int
    notify_count: int
    
    created_at: datetime
    updated_at: datetime
    expire_at: datetime
    model_config = {
        "from_attributes": True
    }
    
class VasExpiringTaskItem(BaseModel):
    id: int
    order_id: str
    routing_key: str
    status: str
    social_media_account: str 
    customer_name: str  # 拼装 first_name + last_name
    expected_end_date: str
    email: str
    days_left: int      # 剩余天数 (负数代表已过期)