"""
Pydantic schemas for Project API.
Defines request and response models for project operations.
"""
from datetime import datetime
from typing import Optional
from pydantic import BaseModel, Field


class ProjectCreate(BaseModel):
    """Schema for creating a new project."""
    
    name: str = Field(..., min_length=1, description="Project name")
    description: str = Field(default="", description="Project description")
    config: str = Field(..., min_length=1, description="Label Studio configuration")
    
    class Config:
        json_schema_extra = {
            "example": {
                "name": "Image Classification Project",
                "description": "Classify images into categories",
                "config": "<View><Image name='image' value='$image'/><Choices name='choice' toName='image'><Choice value='Cat'/><Choice value='Dog'/></Choices></View>"
            }
        }


class ProjectUpdate(BaseModel):
    """Schema for updating an existing project."""
    
    name: Optional[str] = Field(None, min_length=1, description="Project name")
    description: Optional[str] = Field(None, description="Project description")
    config: Optional[str] = Field(None, min_length=1, description="Label Studio configuration")
    
    class Config:
        json_schema_extra = {
            "example": {
                "name": "Updated Project Name",
                "description": "Updated description"
            }
        }


class ProjectResponse(BaseModel):
    """Schema for project response."""
    
    id: str = Field(..., description="Project unique identifier")
    name: str = Field(..., description="Project name")
    description: str = Field(..., description="Project description")
    config: str = Field(..., description="Label Studio configuration")
    created_at: datetime = Field(..., description="Project creation timestamp")
    task_count: int = Field(default=0, description="Number of tasks in project")
    
    class Config:
        json_schema_extra = {
            "example": {
                "id": "proj_123abc",
                "name": "Image Classification Project",
                "description": "Classify images into categories",
                "config": "<View><Image name='image' value='$image'/></View>",
                "created_at": "2024-01-12T10:30:00",
                "task_count": 5
            }
        }