"""
Pydantic schemas for the Chat-to-Tasks feature.
"""
from typing import List, Optional

from pydantic import BaseModel, Field

from app.schemas.task import TaskRead


class ChatInput(BaseModel):
    """Schema for chat input from user."""
    
    message: str = Field(
        ...,
        description="Natural language input describing tasks to be created",
        min_length=3,
        max_length=2000,
    )


class ChatProcessingError(BaseModel):
    """Schema for error details when processing chat."""
    
    error_type: str = Field(..., description="Type of error encountered")
    error_detail: str = Field(..., description="Detailed error information")


class ChatResponse(BaseModel):
    """Schema for chat response with parsed tasks."""
    
    original_message: str = Field(..., description="Original user message")
    tasks: List[TaskRead] = Field(
        default_factory=list,
        description="Tasks extracted from the message",
    )
    processing_successful: bool = Field(
        default=True,
        description="Indicates if processing was successful",
    )
    error: Optional[ChatProcessingError] = Field(
        default=None,
        description="Error details if processing was not successful",
    )
    debug_logs: Optional[List[str]] = None  # <-- Add this field