"""Configuration for automatic thread title generation."""

from pydantic import BaseModel, ConfigDict, Field


class TitleConfig(BaseModel):
    """Configuration for automatic thread title generation."""

    model_config = ConfigDict(frozen=True)

    enabled: bool = Field(
        default=True,
        description="Whether to enable automatic title generation",
    )
    max_words: int = Field(
        default=6,
        ge=1,
        le=20,
        description="Maximum number of words in the generated title",
    )
    max_chars: int = Field(
        default=60,
        ge=10,
        le=200,
        description="Maximum number of characters in the generated title",
    )
    model_name: str | None = Field(
        default=None,
        description="Model name to use for title generation (None = use default model)",
    )
    prompt_template: str = Field(
        default=("Generate a concise title (max {max_words} words) for this conversation.\nUser: {user_msg}\nAssistant: {assistant_msg}\n\nReturn ONLY the title, no quotes, no explanation."),
        description="Prompt template for title generation",
    )