from datetime import datetime
from typing import Optional

from pydantic import BaseModel, Field

from app.models.todo import TodoPriority


# Shared properties
class TodoBase(BaseModel):
    title: str = Field(..., min_length=1, max_length=255, description="Title of the todo item")
    description: Optional[str] = Field(None, max_length=1000, description="Detailed description of the todo item")
    priority: TodoPriority = Field(TodoPriority.MEDIUM, description="Priority level of the todo item")
    completed: bool = Field(False, description="Whether the todo item is completed")


# Properties to receive on todo creation
class TodoCreate(TodoBase):
    pass


# Properties to receive on todo update
class TodoUpdate(BaseModel):
    title: Optional[str] = Field(None, min_length=1, max_length=255, description="Title of the todo item")
    description: Optional[str] = Field(None, max_length=1000, description="Detailed description of the todo item")
    priority: Optional[TodoPriority] = Field(None, description="Priority level of the todo item")
    completed: Optional[bool] = Field(None, description="Whether the todo item is completed")


# Properties shared by models stored in DB
class TodoInDBBase(TodoBase):
    id: int
    created_at: datetime
    updated_at: datetime

    class Config:
        from_attributes = True


# Properties to return to client
class Todo(TodoInDBBase):
    pass