"""Typed models for the query-history domain."""

from __future__ import annotations

from dataclasses import dataclass
from typing import Literal

QueryPage = Literal["search", "compare", "allusions"]


@dataclass(frozen=True)
class QueryRun:
    """One persisted Research run."""
    id: int
    timestamp: str
    page: QueryPage
    mode: str | None              # actual final mode (LOOKUP / COMPARISON / CONCEPTUAL)
    query: str
    params: dict                  # parsed back from params_json
    result: dict                  # parsed back from result_json
    cost_usd: float
    duration_ms: int
    n_calls: int
    pinned: bool
    note: str | None
    username: str | None = None   # who ran it; NULL on rows from before the column existed

    @property
    def query_preview(self) -> str:
        return (self.query or "")[:120] + ("…" if self.query and len(self.query) > 120 else "")