"""评测域数据访问。"""

from __future__ import annotations

import uuid
from typing import Any

from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.features.evaluation.models import (
    EvalCase,
    EvalExperiment,
    EvalGateVerdict,
    EvalRegressionSet,
    EvalRun,
    EvalRunTurn,
    EvalVersion,
)


def _id() -> str:
    return str(uuid.uuid4()).replace("-", "")[:32]


async def list_regression_sets(db: AsyncSession) -> list[EvalRegressionSet]:
    res = await db.execute(
        select(EvalRegressionSet).order_by(EvalRegressionSet.created_at.desc())
    )
    return list(res.scalars().unique().all())


async def get_regression_set(db: AsyncSession, sid: str) -> EvalRegressionSet | None:
    return await db.get(EvalRegressionSet, sid)


async def create_regression_set(
    db: AsyncSession, *, name: str, description: str | None = None
) -> EvalRegressionSet:
    row = EvalRegressionSet(id=_id(), name=name, description=description)
    db.add(row)
    await db.flush()
    return row


async def list_cases(db: AsyncSession, regression_set_id: str) -> list[EvalCase]:
    res = await db.execute(
        select(EvalCase)
        .where(EvalCase.regression_set_id == regression_set_id)
        .order_by(EvalCase.created_at.asc())
    )
    return list(res.scalars().all())


async def create_case(
    db: AsyncSession,
    *,
    regression_set_id: str,
    user_utterances: list[str],
    title: str | None = None,
    source_conversation_id: str | None = None,
    source_user_id: str | None = None,
    reference_memoir_markdown: str | None = None,
    is_protected: bool = False,
    meta: dict[str, Any] | None = None,
) -> EvalCase:
    row = EvalCase(
        id=_id(),
        regression_set_id=regression_set_id,
        source_conversation_id=source_conversation_id,
        source_user_id=source_user_id,
        title=title,
        user_utterances=list(user_utterances),
        reference_memoir_markdown=reference_memoir_markdown,
        is_protected=is_protected,
        meta=meta,
    )
    db.add(row)
    await db.flush()
    return row


async def get_case(db: AsyncSession, case_id: str) -> EvalCase | None:
    return await db.get(EvalCase, case_id)


async def list_versions(db: AsyncSession) -> list[EvalVersion]:
    res = await db.execute(select(EvalVersion).order_by(EvalVersion.created_at.desc()))
    return list(res.scalars().all())


async def create_version(
    db: AsyncSession,
    *,
    name: str,
    runner_kind: str = "llm_chat_v1",
    config_json: dict[str, Any] | None = None,
) -> EvalVersion:
    row = EvalVersion(
        id=_id(),
        name=name,
        runner_kind=runner_kind,
        config_json=config_json,
    )
    db.add(row)
    await db.flush()
    return row


async def get_version(db: AsyncSession, vid: str) -> EvalVersion | None:
    return await db.get(EvalVersion, vid)


async def create_experiment(
    db: AsyncSession,
    *,
    name: str,
    regression_set_id: str,
    baseline_version_id: str,
    candidate_version_id: str,
    rubric_pack: str = "conversation_v1+memoir_v1",
    composite_weights_json: dict[str, Any] | None = None,
) -> EvalExperiment:
    row = EvalExperiment(
        id=_id(),
        name=name,
        regression_set_id=regression_set_id,
        baseline_version_id=baseline_version_id,
        candidate_version_id=candidate_version_id,
        rubric_pack=rubric_pack,
        composite_weights_json=composite_weights_json,
        status="pending",
    )
    db.add(row)
    await db.flush()
    return row


async def get_experiment(db: AsyncSession, eid: str) -> EvalExperiment | None:
    return await db.get(EvalExperiment, eid)


async def list_experiments(db: AsyncSession, limit: int = 50) -> list[EvalExperiment]:
    res = await db.execute(
        select(EvalExperiment).order_by(EvalExperiment.created_at.desc()).limit(limit)
    )
    return list(res.scalars().all())


async def update_experiment(
    db: AsyncSession,
    exp: EvalExperiment,
    *,
    status: str | None = None,
    error_message: str | None = None,
    completed_at: Any | None = ...,
) -> None:
    if status is not None:
        exp.status = status
    if error_message is not None:
        exp.error_message = error_message
    if completed_at is not ...:
        exp.completed_at = completed_at


async def get_run(
    db: AsyncSession, experiment_id: str, case_id: str, side: str
) -> EvalRun | None:
    res = await db.execute(
        select(EvalRun).where(
            EvalRun.experiment_id == experiment_id,
            EvalRun.case_id == case_id,
            EvalRun.side == side,
        )
    )
    return res.scalars().first()


async def create_run(
    db: AsyncSession,
    *,
    experiment_id: str,
    case_id: str,
    side: str,
) -> EvalRun:
    row = EvalRun(
        id=_id(),
        experiment_id=experiment_id,
        case_id=case_id,
        side=side,
        status="pending",
    )
    db.add(row)
    await db.flush()
    return row


async def list_runs_for_experiment(
    db: AsyncSession, experiment_id: str
) -> list[EvalRun]:
    res = await db.execute(
        select(EvalRun).where(EvalRun.experiment_id == experiment_id)
    )
    return list(res.scalars().all())


async def list_runs_for_source_conversation(
    db: AsyncSession,
    *,
    source_conversation_id: str,
    limit: int = 80,
) -> list[tuple[EvalRun, EvalCase, EvalExperiment]]:
    stmt = (
        select(EvalRun, EvalCase, EvalExperiment)
        .join(EvalCase, EvalRun.case_id == EvalCase.id)
        .join(EvalExperiment, EvalRun.experiment_id == EvalExperiment.id)
        .where(EvalCase.source_conversation_id == source_conversation_id)
        .order_by(
            EvalRun.completed_at.desc().nulls_last(),
            EvalRun.started_at.desc().nulls_last(),
        )
        .limit(limit)
    )
    res = await db.execute(stmt)
    return list(res.all())


async def update_run(
    db: AsyncSession,
    run: EvalRun,
    *,
    status: str | None = None,
    error_message: str | None = None,
    memoir_markdown: str | None = None,
    conversation_score_total: float | None = None,
    memoir_score_total: float | None = None,
    composite_score: float | None = None,
    judge_bundle_json: dict[str, Any] | None = None,
    started_at: Any | None = ...,
    completed_at: Any | None = ...,
) -> None:
    if status is not None:
        run.status = status
    if error_message is not None:
        run.error_message = error_message
    if memoir_markdown is not None:
        run.memoir_markdown = memoir_markdown
    if conversation_score_total is not None:
        run.conversation_score_total = conversation_score_total
    if memoir_score_total is not None:
        run.memoir_score_total = memoir_score_total
    if composite_score is not None:
        run.composite_score = composite_score
    if judge_bundle_json is not None:
        run.judge_bundle_json = judge_bundle_json
    if started_at is not ...:
        run.started_at = started_at
    if completed_at is not ...:
        run.completed_at = completed_at


async def add_turn(
    db: AsyncSession,
    *,
    run_id: str,
    turn_index: int,
    user_utterance: str,
    assistant_reply: str | None,
    duration_ms: int | None,
    judge_scores_json: dict[str, Any] | None,
    judge_rationale: str | None,
) -> EvalRunTurn:
    row = EvalRunTurn(
        id=_id(),
        run_id=run_id,
        turn_index=turn_index,
        user_utterance=user_utterance,
        assistant_reply=assistant_reply,
        duration_ms=duration_ms,
        judge_scores_json=judge_scores_json,
        judge_rationale=judge_rationale,
    )
    db.add(row)
    await db.flush()
    return row


async def list_turns(db: AsyncSession, run_id: str) -> list[EvalRunTurn]:
    res = await db.execute(
        select(EvalRunTurn)
        .where(EvalRunTurn.run_id == run_id)
        .order_by(EvalRunTurn.turn_index.asc())
    )
    return list(res.scalars().all())


async def upsert_gate_verdict(
    db: AsyncSession,
    *,
    experiment_id: str,
    passed: bool,
    mean_composite_delta: float | None,
    protected_regressions_json: list[dict[str, Any]] | None,
    details_json: dict[str, Any] | None,
) -> EvalGateVerdict:
    res = await db.execute(
        select(EvalGateVerdict).where(EvalGateVerdict.experiment_id == experiment_id)
    )
    row = res.scalars().first()
    if row:
        row.passed = passed
        row.mean_composite_delta = mean_composite_delta
        row.protected_regressions_json = protected_regressions_json
        row.details_json = details_json
        await db.flush()
        return row
    row = EvalGateVerdict(
        id=_id(),
        experiment_id=experiment_id,
        passed=passed,
        mean_composite_delta=mean_composite_delta,
        protected_regressions_json=protected_regressions_json,
        details_json=details_json,
    )
    db.add(row)
    await db.flush()
    return row


async def get_gate_verdict(
    db: AsyncSession, experiment_id: str
) -> EvalGateVerdict | None:
    res = await db.execute(
        select(EvalGateVerdict).where(EvalGateVerdict.experiment_id == experiment_id)
    )
    return res.scalars().first()