from datetime import datetime
from typing import Optional
from pydantic import BaseModel, Field, ConfigDict

from app.models.task import TaskPriority, TaskStatus

# Shared properties
class TaskBase(BaseModel):
    title: str = Field(..., min_length=1, max_length=100)
    description: Optional[str] = None
    status: TaskStatus = TaskStatus.TODO
    priority: TaskPriority = TaskPriority.MEDIUM
    due_date: Optional[datetime] = None

# Properties to receive on task creation
class TaskCreate(TaskBase):
    pass

# Properties to receive on task update
class TaskUpdate(BaseModel):
    title: Optional[str] = Field(None, min_length=1, max_length=100)
    description: Optional[str] = None
    status: Optional[TaskStatus] = None
    priority: Optional[TaskPriority] = None
    due_date: Optional[datetime] = None
    completed_at: Optional[datetime] = None

# Properties shared by models stored in DB
class TaskInDBBase(TaskBase):
    id: str
    owner_id: str
    created_at: datetime
    updated_at: datetime
    completed_at: Optional[datetime] = None
    
    model_config = ConfigDict(from_attributes=True)

# Properties to return to client
class Task(TaskInDBBase):
    pass

# Properties stored in DB
class TaskInDB(TaskInDBBase):
    pass