"""Pydantic schemas for request/response validation."""

from datetime import datetime
from typing import Optional, List
from pydantic import BaseModel


class TaskBase(BaseModel):
    """Base task schema with common fields."""

    title: str
    description: Optional[str] = None
    priority: str = "medium"
    status: str = "TODO"
    assignee: Optional[str] = None
    tags: Optional[str] = None
    time_estimate: Optional[float] = None
    due_date: Optional[datetime] = None


class TaskCreate(TaskBase):
    """Schema for creating a task."""

    pass


class TaskUpdate(BaseModel):
    """Schema for updating a task."""

    title: Optional[str] = None
    description: Optional[str] = None
    priority: Optional[str] = None
    status: Optional[str] = None
    assignee: Optional[str] = None
    tags: Optional[str] = None
    time_estimate: Optional[float] = None
    due_date: Optional[datetime] = None


class TaskResponse(TaskBase):
    """Schema for task response."""

    id: int
    created_at: datetime
    updated_at: datetime

    class Config:
        from_attributes = True


class TaskListResponse(BaseModel):
    """Schema for task list response."""

    tasks: List[TaskResponse]
    total: int