"""Task schemas for CRUD operations."""

from pydantic import BaseModel, Field
from datetime import datetime
from typing import Optional, List
from app.models.task import TaskStatus, TaskPriority


class TaskBase(BaseModel):
    """Base task schema."""
    title: str = Field(..., min_length=1, max_length=255)
    description: Optional[str] = None
    priority: TaskPriority = TaskPriority.MEDIUM
    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] = Field(None, min_length=1, max_length=255)
    description: Optional[str] = None
    status: Optional[TaskStatus] = None
    priority: Optional[TaskPriority] = None
    due_date: Optional[datetime] = None


class TaskResponse(TaskBase):
    """Schema for task response."""
    id: int
    status: TaskStatus
    owner_id: int
    completed_at: Optional[datetime] = None
    created_at: datetime
    updated_at: Optional[datetime] = None

    class Config:
        from_attributes = True


class TaskList(BaseModel):
    """Schema for paginated task list."""
    tasks: List[TaskResponse]
    total: int
    page: int
    per_page: int