"""Append-only persistence for the G6 Supervision & Research OS."""

from __future__ import annotations

from collections.abc import Mapping, Sequence
from typing import Any
from uuid import UUID, uuid5

import asyncpg

from ..contracts.supervision_research import (
    EvaluationVersionBatch,
    LedgerEvidencePointer,
    LearnerAttentionSignal,
    Phase3EvidenceArtifact,
    TeacherAiDisagreement,
)
from .supervision_research import (
    build_attention_queue,
    build_calibration_dataset,
    build_phase3_outcome_manifest,
    compare_evaluation_versions,
)
from .outcome_repository_values import (
    canonical_hash as _canonical_hash,
    value as _value,
)


_POINTER_NAMESPACE = UUID("f99f95ba-365e-46ea-a613-2239275f8a2d")


class SupervisionResearchError(ValueError):
    """Base error for the G6 persistence boundary."""


class SupervisionResearchConflictError(SupervisionResearchError):
    """A stable submission id was reused with changed content."""


class SupervisionResearchNotFoundError(SupervisionResearchError):
    """Required source evidence or a visible aggregate does not exist."""


async def _existing_submission(
    conn: asyncpg.Connection,
    *,
    table: str,
    id_column: str,
    submission_id: UUID,
    content_hash: str,
) -> UUID | None:
    row = await conn.fetchrow(
        f"SELECT {id_column}, content_hash FROM {table} WHERE submission_id = $1",
        submission_id,
    )
    if row is None:
        return None
    if str(_value(row, "content_hash")) != content_hash:
        raise SupervisionResearchConflictError(
            "submission id was already used with different content"
        )
    return UUID(str(_value(row, id_column)))


def _pointer_id(
    learner_id: UUID, consumer_view: str, pointer: LedgerEvidencePointer
) -> UUID:
    return uuid5(
        _POINTER_NAMESPACE,
        "|".join(
            (
                str(learner_id),
                consumer_view,
                pointer.ledger,
                pointer.event_id,
                pointer.route_hint,
            )
        ),
    )


async def _ensure_pointer(
    conn: asyncpg.Connection,
    *,
    learner_id: UUID,
    cohort_id: str,
    consumer_view: str,
    pointer: LedgerEvidencePointer,
) -> UUID:
    pointer_id = _pointer_id(learner_id, consumer_view, pointer)
    payload = {
        "pointer_id": str(pointer_id),
        "learner_id": str(learner_id),
        "cohort_id": cohort_id,
        "consumer_view": consumer_view,
        **pointer.model_dump(mode="json"),
    }
    content_hash = _canonical_hash(payload)
    try:
        session_id = UUID(pointer.session_id) if pointer.session_id else None
    except ValueError as exc:
        raise SupervisionResearchError(
            "ledger evidence session_id must be a UUID when provided"
        ) from exc
    try:
        await conn.execute(
            """
            INSERT INTO app.supervision_evidence_pointer (
              pointer_id, learner_id, cohort_id, consumer_view, ledger,
              event_id, session_id, route_hint, content_hash
            ) VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9)
            ON CONFLICT (pointer_id) DO NOTHING
            """,
            pointer_id,
            learner_id,
            cohort_id,
            consumer_view,
            pointer.ledger,
            pointer.event_id,
            session_id,
            pointer.route_hint,
            content_hash,
        )
    except (asyncpg.CheckViolationError, asyncpg.InvalidTextRepresentationError) as exc:
        raise SupervisionResearchNotFoundError(
            "ledger evidence pointer is invalid or outside learner scope"
        ) from exc
    row = await conn.fetchrow(
        """
        SELECT content_hash FROM app.supervision_evidence_pointer
        WHERE pointer_id = $1
        """,
        pointer_id,
    )
    if row is None:
        raise SupervisionResearchNotFoundError("ledger evidence pointer is not visible")
    if str(_value(row, "content_hash")) != content_hash:
        raise SupervisionResearchConflictError(
            "stable evidence pointer resolved to changed metadata"
        )
    return pointer_id


async def append_attention_snapshot(
    conn: asyncpg.Connection,
    *,
    submission_id: UUID,
    snapshot_id: UUID,
    cohort_id: str,
    signals: Sequence[LearnerAttentionSignal],
    learner_ids_by_ref: Mapping[str, UUID],
) -> dict[str, Any]:
    queue = build_attention_queue(signals)
    if not queue:
        raise SupervisionResearchError("attention snapshot requires an active item")
    missing = {item.learner_ref for item in queue} - set(learner_ids_by_ref)
    if missing:
        raise SupervisionResearchError(
            f"learner UUID mapping is missing: {','.join(sorted(missing))}"
        )
    payload = {
        "snapshot_id": str(snapshot_id),
        "cohort_id": cohort_id,
        "signals": [item.model_dump(mode="json") for item in signals],
        "learner_ids_by_ref": {
            key: str(value) for key, value in sorted(learner_ids_by_ref.items())
        },
    }
    content_hash = _canonical_hash(payload)
    await conn.execute(
        "SELECT pg_advisory_xact_lock(hashtextextended($1::text, 61))",
        str(submission_id),
    )
    existing = await _existing_submission(
        conn,
        table="app.supervision_attention_snapshot",
        id_column="snapshot_id",
        submission_id=submission_id,
        content_hash=content_hash,
    )
    if existing is not None:
        return {
            "submission_id": submission_id,
            "snapshot_id": existing,
            "item_count": len(queue),
            "idempotent_replay": True,
            "clinical_claim_allowed": False,
        }

    staged: list[tuple[Any, UUID, list[tuple[Any, UUID]]]] = []
    all_pointer_ids: list[UUID] = []
    for item in queue:
        learner_id = learner_ids_by_ref[item.learner_ref]
        selected: list[tuple[Any, UUID]] = []
        seen_pointer_ids: set[UUID] = set()
        for reason in item.reasons:
            if len(selected) >= 3:
                break
            pointer = reason.evidence[0]
            pointer_id = await _ensure_pointer(
                conn,
                learner_id=learner_id,
                cohort_id=cohort_id,
                consumer_view="supervisor",
                pointer=pointer,
            )
            if pointer_id in seen_pointer_ids:
                continue
            seen_pointer_ids.add(pointer_id)
            selected.append((reason, pointer_id))
            all_pointer_ids.append(pointer_id)
        if not selected:
            raise SupervisionResearchError("attention item requires direct evidence")
        staged.append((item, learner_id, selected))

    unique_source_ids = list(dict.fromkeys(all_pointer_ids))
    await conn.execute(
        """
        INSERT INTO app.supervision_attention_snapshot (
          snapshot_id, submission_id, content_hash, cohort_id, item_count,
          source_pointer_ids
        ) VALUES ($1,$2,$3,$4,$5,$6)
        """,
        snapshot_id,
        submission_id,
        content_hash,
        cohort_id,
        len(queue),
        unique_source_ids,
    )
    for item, learner_id, selected in staged:
        item_id = uuid5(snapshot_id, item.learner_ref)
        pointer_ids = [entry[1] for entry in selected]
        routes = list(dict.fromkeys(entry[0].evidence[0].route_hint for entry in selected))
        await conn.execute(
            """
            INSERT INTO app.supervision_attention_item (
              item_id, snapshot_id, learner_id, learner_ref, cohort_id,
              queue_position, primary_signal, oldest_active_sequence,
              drilldown_routes, evidence_pointer_ids
            ) VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10)
            """,
            item_id,
            snapshot_id,
            learner_id,
            item.learner_ref,
            cohort_id,
            item.queue_position,
            item.primary_signal,
            item.oldest_active_sequence,
            routes,
            pointer_ids,
        )
        for reason, pointer_id in selected:
            await conn.execute(
                """
                INSERT INTO app.supervision_attention_reason (
                  reason_id, item_id, signal_id, signal_type, severity,
                  uncertainty, evidence_pointer_ids
                ) VALUES ($1,$2,$3,$4,$5,$6,$7)
                """,
                uuid5(item_id, reason.signal_id),
                item_id,
                reason.signal_id,
                reason.signal_type,
                reason.severity,
                reason.uncertainty,
                [pointer_id],
            )
    return {
        "submission_id": submission_id,
        "snapshot_id": snapshot_id,
        "item_count": len(queue),
        "idempotent_replay": False,
        "clinical_claim_allowed": False,
    }


async def append_teacher_disagreement(
    conn: asyncpg.Connection,
    *,
    submission_id: UUID,
    disagreement_record_id: UUID,
    dataset_row_id: UUID,
    audit_event_id: UUID,
    learner_id: UUID,
    cohort_id: str,
    actor_uid: UUID,
    disagreement: TeacherAiDisagreement,
) -> dict[str, Any]:
    dataset_row = build_calibration_dataset((disagreement,))[0]
    payload = {
        "disagreement_record_id": str(disagreement_record_id),
        "dataset_row_id": str(dataset_row_id),
        "audit_event_id": str(audit_event_id),
        "learner_id": str(learner_id),
        "cohort_id": cohort_id,
        "actor_uid": str(actor_uid),
        "disagreement": disagreement.model_dump(mode="json"),
    }
    content_hash = _canonical_hash(payload)
    await conn.execute(
        "SELECT pg_advisory_xact_lock(hashtextextended($1::text, 62))",
        str(submission_id),
    )
    existing = await _existing_submission(
        conn,
        table="app.supervision_teacher_ai_disagreement",
        id_column="disagreement_record_id",
        submission_id=submission_id,
        content_hash=content_hash,
    )
    if existing is not None:
        return {
            "submission_id": submission_id,
            "disagreement_record_id": existing,
            "dataset_row_hash": dataset_row.row_id,
            "idempotent_replay": True,
            "raw_transcript_included": False,
            "clinical_claim_allowed": False,
        }

    ai_ids = [
        await _ensure_pointer(
            conn,
            learner_id=learner_id,
            cohort_id=cohort_id,
            consumer_view="research",
            pointer=pointer,
        )
        for pointer in disagreement.ai_evidence
    ]
    teacher_ids = [
        await _ensure_pointer(
            conn,
            learner_id=learner_id,
            cohort_id=cohort_id,
            consumer_view="research",
            pointer=pointer,
        )
        for pointer in disagreement.teacher_correction_evidence
    ]
    evidence_ids = list(dict.fromkeys((*ai_ids, *teacher_ids)))
    if len(evidence_ids) < 2:
        raise SupervisionResearchError(
            "calibration dataset requires two distinct ledger UUID pointers"
        )
    await conn.execute(
        """
        INSERT INTO app.supervision_teacher_ai_disagreement (
          disagreement_record_id, submission_id, content_hash, disagreement_id,
          learner_id, cohort_id, case_ref, competency_id, ai_label, teacher_label,
          ai_model, prompt_version, instrument_id, instrument_version,
          correction_reason_code, ai_evidence_pointer_ids,
          teacher_evidence_pointer_ids, created_by_uid
        ) VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14,$15,$16,$17,$18)
        """,
        disagreement_record_id,
        submission_id,
        content_hash,
        disagreement.disagreement_id,
        learner_id,
        cohort_id,
        disagreement.case_ref,
        disagreement.competency_id,
        disagreement.ai_label,
        disagreement.teacher_label,
        disagreement.ai_model,
        disagreement.prompt_version,
        disagreement.instrument_id,
        disagreement.instrument_version,
        disagreement.correction_reason_code,
        ai_ids,
        teacher_ids,
        actor_uid,
    )
    await conn.execute(
        """
        INSERT INTO app.supervision_calibration_dataset_row (
          dataset_row_id, disagreement_record_id, learner_id, cohort_id,
          row_hash, evidence_pointer_ids
        ) VALUES ($1,$2,$3,$4,$5,$6)
        """,
        dataset_row_id,
        disagreement_record_id,
        learner_id,
        cohort_id,
        dataset_row.row_id,
        evidence_ids,
    )
    await conn.execute(
        """
        INSERT INTO audit.supervision_teacher_event (
          audit_event_id, disagreement_record_id, actor_uid, learner_id,
          cohort_id, action, content_hash, evidence_pointer_ids
        ) VALUES ($1,$2,$3,$4,$5,'teacher_ai_disagreement.corrected',$6,$7)
        """,
        audit_event_id,
        disagreement_record_id,
        actor_uid,
        learner_id,
        cohort_id,
        content_hash,
        evidence_ids,
    )
    return {
        "submission_id": submission_id,
        "disagreement_record_id": disagreement_record_id,
        "dataset_row_hash": dataset_row.row_id,
        "idempotent_replay": False,
        "raw_transcript_included": False,
        "clinical_claim_allowed": False,
    }


async def append_curriculum_gap(
    conn: asyncpg.Connection,
    *,
    submission_id: UUID,
    gap_snapshot_id: UUID,
    cohort_id: str,
    competency_id: str,
    gap_kind: str,
    status: str,
    uncertainty: float,
    affected_learner_count: int,
    evidence: Sequence[tuple[UUID, LedgerEvidencePointer]],
) -> dict[str, Any]:
    payload = {
        "gap_snapshot_id": str(gap_snapshot_id),
        "cohort_id": cohort_id,
        "competency_id": competency_id,
        "gap_kind": gap_kind,
        "status": status,
        "uncertainty": uncertainty,
        "affected_learner_count": affected_learner_count,
        "evidence": [
            {"learner_id": str(learner_id), **pointer.model_dump(mode="json")}
            for learner_id, pointer in evidence
        ],
    }
    content_hash = _canonical_hash(payload)
    await conn.execute(
        "SELECT pg_advisory_xact_lock(hashtextextended($1::text, 63))",
        str(submission_id),
    )
    existing = await _existing_submission(
        conn,
        table="app.supervision_curriculum_gap_snapshot",
        id_column="gap_snapshot_id",
        submission_id=submission_id,
        content_hash=content_hash,
    )
    if existing is not None:
        return {
            "submission_id": submission_id,
            "gap_snapshot_id": existing,
            "idempotent_replay": True,
            "clinical_claim_allowed": False,
        }
    if status == "insufficient_evidence":
        if evidence or uncertainty != 1.0:
            raise SupervisionResearchError(
                "insufficient curriculum gap must remain evidence-free"
            )
        pointer_ids: list[UUID] = []
    else:
        if not evidence:
            raise SupervisionResearchError("observed curriculum gap requires evidence")
        pointer_ids = [
            await _ensure_pointer(
                conn,
                learner_id=learner_id,
                cohort_id=cohort_id,
                consumer_view="supervisor",
                pointer=pointer,
            )
            for learner_id, pointer in evidence
        ]
    await conn.execute(
        """
        INSERT INTO app.supervision_curriculum_gap_snapshot (
          gap_snapshot_id, submission_id, content_hash, cohort_id, competency_id,
          gap_kind, status, uncertainty, affected_learner_count, evidence_pointer_ids
        ) VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10)
        """,
        gap_snapshot_id,
        submission_id,
        content_hash,
        cohort_id,
        competency_id,
        gap_kind,
        status,
        uncertainty,
        affected_learner_count,
        list(dict.fromkeys(pointer_ids)),
    )
    return {
        "submission_id": submission_id,
        "gap_snapshot_id": gap_snapshot_id,
        "idempotent_replay": False,
        "clinical_claim_allowed": False,
    }


async def _append_batch(
    conn: asyncpg.Connection,
    *,
    submission_id: UUID,
    batch_record_id: UUID,
    cohort_id: str,
    batch: EvaluationVersionBatch,
    pointers_by_event_id: Mapping[str, LedgerEvidencePointer],
    learner_ids_by_event_id: Mapping[str, UUID],
) -> tuple[UUID, bool, list[UUID]]:
    payload = {
        "batch_record_id": str(batch_record_id),
        "cohort_id": cohort_id,
        "batch": batch.model_dump(mode="json"),
        "pointers": {
            key: value.model_dump(mode="json")
            for key, value in sorted(pointers_by_event_id.items())
        },
        "learner_ids": {
            key: str(value) for key, value in sorted(learner_ids_by_event_id.items())
        },
    }
    content_hash = _canonical_hash(payload)
    await conn.execute(
        "SELECT pg_advisory_xact_lock(hashtextextended($1::text, 66))",
        str(submission_id),
    )
    existing = await _existing_submission(
        conn,
        table="app.supervision_evaluation_batch",
        id_column="batch_record_id",
        submission_id=submission_id,
        content_hash=content_hash,
    )
    if existing is not None:
        rows = await conn.fetch(
            "SELECT evidence_pointer_id FROM app.supervision_evaluation_observation WHERE batch_record_id = $1",
            existing,
        )
        return existing, True, [UUID(str(row["evidence_pointer_id"])) for row in rows]
    event_ids = [item.evidence_event_id for item in batch.observations]
    missing = set(event_ids) - set(pointers_by_event_id) | set(event_ids) - set(
        learner_ids_by_event_id
    )
    if missing:
        raise SupervisionResearchError(
            f"evaluation evidence mapping is missing: {','.join(sorted(missing))}"
        )
    pointer_ids: list[UUID] = []
    for item in batch.observations:
        pointer = pointers_by_event_id[item.evidence_event_id]
        if pointer.event_id != item.evidence_event_id:
            raise SupervisionResearchError("evaluation evidence event id mismatch")
        pointer_ids.append(
            await _ensure_pointer(
                conn,
                learner_id=learner_ids_by_event_id[item.evidence_event_id],
                cohort_id=cohort_id,
                consumer_view="research",
                pointer=pointer,
            )
        )
    await conn.execute(
        """
        INSERT INTO app.supervision_evaluation_batch (
          batch_record_id, submission_id, content_hash, batch_id, cohort_id,
          model_name, prompt_version, instrument_id, instrument_version,
          observation_count
        ) VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10)
        """,
        batch_record_id,
        submission_id,
        content_hash,
        batch.batch_id,
        cohort_id,
        batch.model,
        batch.prompt_version,
        batch.instrument_id,
        batch.instrument_version,
        len(batch.observations),
    )
    for index, item in enumerate(batch.observations):
        await conn.execute(
            """
            INSERT INTO app.supervision_evaluation_observation (
              observation_record_id, batch_record_id, cohort_id, case_ref,
              competency_id, synthetic_subgroup, gold_label, predicted_label,
              evidence_pointer_id
            ) VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9)
            """,
            uuid5(batch_record_id, f"{item.case_ref}|{item.competency_id}"),
            batch_record_id,
            cohort_id,
            item.case_ref,
            item.competency_id,
            item.synthetic_subgroup,
            item.gold_label,
            item.predicted_label,
            pointer_ids[index],
        )
    return batch_record_id, False, pointer_ids


async def append_evaluation_comparison(
    conn: asyncpg.Connection,
    *,
    submission_id: UUID,
    drift_report_id: UUID,
    baseline_submission_id: UUID,
    baseline_batch_record_id: UUID,
    candidate_submission_id: UUID,
    candidate_batch_record_id: UUID,
    cohort_id: str,
    baseline: EvaluationVersionBatch,
    candidate: EvaluationVersionBatch,
    pointers_by_event_id: Mapping[str, LedgerEvidencePointer],
    learner_ids_by_event_id: Mapping[str, UUID],
) -> dict[str, Any]:
    report = compare_evaluation_versions(baseline, candidate)
    payload = {
        "drift_report_id": str(drift_report_id),
        "cohort_id": cohort_id,
        "baseline": baseline.model_dump(mode="json"),
        "candidate": candidate.model_dump(mode="json"),
        "report": report.model_dump(mode="json"),
    }
    content_hash = _canonical_hash(payload)
    await conn.execute(
        "SELECT pg_advisory_xact_lock(hashtextextended($1::text, 64))",
        str(submission_id),
    )
    existing = await _existing_submission(
        conn,
        table="app.supervision_drift_report",
        id_column="drift_report_id",
        submission_id=submission_id,
        content_hash=content_hash,
    )
    if existing is not None:
        return {
            "submission_id": submission_id,
            "drift_report_id": existing,
            "status": report.status,
            "matched_count": report.matched_count,
            "idempotent_replay": True,
            "clinical_claim_allowed": False,
        }
    baseline_record_id, _, baseline_pointers = await _append_batch(
        conn,
        submission_id=baseline_submission_id,
        batch_record_id=baseline_batch_record_id,
        cohort_id=cohort_id,
        batch=baseline,
        pointers_by_event_id=pointers_by_event_id,
        learner_ids_by_event_id=learner_ids_by_event_id,
    )
    candidate_record_id, _, candidate_pointers = await _append_batch(
        conn,
        submission_id=candidate_submission_id,
        batch_record_id=candidate_batch_record_id,
        cohort_id=cohort_id,
        batch=candidate,
        pointers_by_event_id=pointers_by_event_id,
        learner_ids_by_event_id=learner_ids_by_event_id,
    )
    evidence_ids = list(dict.fromkeys((*baseline_pointers, *candidate_pointers)))
    await conn.execute(
        """
        INSERT INTO app.supervision_drift_report (
          drift_report_id, submission_id, content_hash, cohort_id,
          baseline_batch_record_id, candidate_batch_record_id, matched_count,
          status, baseline_accuracy, candidate_accuracy, accuracy_delta,
          disagreement_case_refs, alerts, evidence_pointer_ids
        ) VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14)
        """,
        drift_report_id,
        submission_id,
        content_hash,
        cohort_id,
        baseline_record_id,
        candidate_record_id,
        report.matched_count,
        report.status,
        report.baseline_accuracy,
        report.candidate_accuracy,
        report.accuracy_delta,
        list(report.disagreement_case_refs),
        list(report.alerts),
        evidence_ids,
    )
    for metric in report.subgroup_metrics:
        await conn.execute(
            """
            INSERT INTO app.supervision_drift_subgroup_metric (
              subgroup_metric_id, drift_report_id, cohort_id, subgroup,
              matched_count, baseline_accuracy, candidate_accuracy, accuracy_delta
            ) VALUES ($1,$2,$3,$4,$5,$6,$7,$8)
            """,
            uuid5(drift_report_id, metric.subgroup),
            drift_report_id,
            cohort_id,
            metric.subgroup,
            metric.matched_count,
            metric.baseline_accuracy,
            metric.candidate_accuracy,
            metric.accuracy_delta,
        )
    return {
        "submission_id": submission_id,
        "drift_report_id": drift_report_id,
        "status": report.status,
        "matched_count": report.matched_count,
        "idempotent_replay": False,
        "clinical_claim_allowed": False,
    }


async def append_phase3_manifest(
    conn: asyncpg.Connection,
    *,
    submission_id: UUID,
    manifest_id: UUID,
    cohort_id: str,
    artifacts: Sequence[Phase3EvidenceArtifact],
    source_by_domain: Mapping[str, tuple[UUID, LedgerEvidencePointer]],
) -> dict[str, Any]:
    manifest = build_phase3_outcome_manifest(artifacts)
    missing = {item.domain for item in manifest.artifacts} - set(source_by_domain)
    if missing:
        raise SupervisionResearchError(
            f"manifest provenance mapping is missing: {','.join(sorted(missing))}"
        )
    payload = {
        "manifest_id": str(manifest_id),
        "cohort_id": cohort_id,
        "manifest": manifest.model_dump(mode="json"),
        "source_by_domain": {
            key: {
                "learner_id": str(value[0]),
                "pointer": value[1].model_dump(mode="json"),
            }
            for key, value in sorted(source_by_domain.items())
        },
    }
    content_hash = _canonical_hash(payload)
    await conn.execute(
        "SELECT pg_advisory_xact_lock(hashtextextended($1::text, 65))",
        str(submission_id),
    )
    existing = await _existing_submission(
        conn,
        table="app.supervision_phase3_manifest",
        id_column="manifest_id",
        submission_id=submission_id,
        content_hash=content_hash,
    )
    if existing is not None:
        return {
            "submission_id": submission_id,
            "manifest_id": existing,
            "artifact_count": 4,
            "idempotent_replay": True,
            "clinical_claim_allowed": False,
        }
    staged: list[tuple[Phase3EvidenceArtifact, UUID]] = []
    for artifact in manifest.artifacts:
        learner_id, pointer = source_by_domain[artifact.domain]
        staged.append(
            (
                artifact,
                await _ensure_pointer(
                    conn,
                    learner_id=learner_id,
                    cohort_id=cohort_id,
                    consumer_view="research",
                    pointer=pointer,
                ),
            )
        )
    await conn.execute(
        """
        INSERT INTO app.supervision_phase3_manifest (
          manifest_id, submission_id, content_hash, cohort_id,
          schema_version, artifact_count
        ) VALUES ($1,$2,$3,$4,$5,4)
        """,
        manifest_id,
        submission_id,
        content_hash,
        cohort_id,
        manifest.schema_version,
    )
    for artifact, pointer_id in staged:
        await conn.execute(
            """
            INSERT INTO app.supervision_phase3_artifact (
              artifact_record_id, manifest_id, cohort_id, domain, artifact_id,
              schema_version, content_sha256, record_count, provenance_uri,
              source_pointer_id
            ) VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10)
            """,
            uuid5(manifest_id, artifact.domain),
            manifest_id,
            cohort_id,
            artifact.domain,
            artifact.artifact_id,
            artifact.schema_version,
            artifact.content_sha256,
            artifact.record_count,
            artifact.provenance_uri,
            pointer_id,
        )
    return {
        "submission_id": submission_id,
        "manifest_id": manifest_id,
        "artifact_count": 4,
        "idempotent_replay": False,
        "clinical_claim_allowed": False,
    }


async def read_supervision_view(conn: asyncpg.Connection) -> dict[str, Any]:
    items = await conn.fetch(
        """
        SELECT item_id, snapshot_id, learner_id, learner_ref, cohort_id,
               queue_position, primary_signal, oldest_active_sequence,
               drilldown_routes, evidence_pointer_ids, created_at
        FROM app.supervision_attention_item ORDER BY created_at DESC, queue_position
        """
    )
    gaps = await conn.fetch(
        """
        SELECT gap_snapshot_id, cohort_id, competency_id, gap_kind, status,
               uncertainty, affected_learner_count, evidence_pointer_ids, created_at
        FROM app.supervision_curriculum_gap_snapshot ORDER BY created_at DESC
        """
    )
    return {
        "attention_items": [dict(row) for row in items],
        "curriculum_gaps": [dict(row) for row in gaps],
        "clinical_claim_allowed": False,
    }


async def read_research_view(conn: asyncpg.Connection) -> dict[str, Any]:
    datasets = await conn.fetch(
        """
        SELECT d.dataset_row_id, d.row_hash, d.disagreement_record_id,
               d.evidence_pointer_ids, d.raw_transcript_included, d.created_at,
               x.case_ref, x.competency_id, x.ai_label, x.teacher_label,
               x.ai_model, x.prompt_version, x.instrument_id,
               x.instrument_version, x.correction_reason_code
        FROM app.supervision_calibration_dataset_row d
        JOIN app.supervision_teacher_ai_disagreement x
          ON x.disagreement_record_id = d.disagreement_record_id
        ORDER BY d.created_at DESC
        """
    )
    drift = await conn.fetch(
        """
        SELECT r.drift_report_id, r.cohort_id, r.matched_count, r.status,
               r.baseline_accuracy, r.candidate_accuracy, r.accuracy_delta,
               r.disagreement_case_refs, r.alerts, r.evidence_pointer_ids,
               r.created_at,
               b.model_name AS baseline_model,
               c.model_name AS candidate_model,
               b.prompt_version AS baseline_prompt_version,
               c.prompt_version AS candidate_prompt_version,
               b.instrument_id,
               b.instrument_version AS baseline_instrument_version,
               c.instrument_version AS candidate_instrument_version
        FROM app.supervision_drift_report r
        JOIN app.supervision_evaluation_batch b
          ON b.batch_record_id = r.baseline_batch_record_id
        JOIN app.supervision_evaluation_batch c
          ON c.batch_record_id = r.candidate_batch_record_id
        ORDER BY r.created_at DESC
        """
    )
    subgroup_metrics = await conn.fetch(
        """
        SELECT drift_report_id, subgroup, matched_count, baseline_accuracy,
               candidate_accuracy, accuracy_delta
        FROM app.supervision_drift_subgroup_metric
        ORDER BY drift_report_id, subgroup
        """
    )
    manifests = await conn.fetch(
        """
        SELECT manifest_id, cohort_id, schema_version, artifact_count, created_at
        FROM app.supervision_phase3_manifest ORDER BY created_at DESC
        """
    )
    manifest_artifacts = await conn.fetch(
        """
        SELECT manifest_id, domain, artifact_id, schema_version, content_sha256,
               record_count, provenance_uri, clinical_claim_allowed
        FROM app.supervision_phase3_artifact
        ORDER BY manifest_id, domain
        """
    )
    subgroup_by_report: dict[UUID, list[dict[str, Any]]] = {}
    for row in subgroup_metrics:
        payload = dict(row)
        report_id = payload.pop("drift_report_id")
        subgroup_by_report.setdefault(report_id, []).append(payload)
    drift_payloads: list[dict[str, Any]] = []
    for row in drift:
        payload = dict(row)
        payload["subgroup_metrics"] = subgroup_by_report.get(
            payload["drift_report_id"], []
        )
        drift_payloads.append(payload)

    artifacts_by_manifest: dict[UUID, list[dict[str, Any]]] = {}
    for row in manifest_artifacts:
        payload = dict(row)
        manifest_id = payload.pop("manifest_id")
        artifacts_by_manifest.setdefault(manifest_id, []).append(payload)
    manifest_payloads: list[dict[str, Any]] = []
    for row in manifests:
        payload = dict(row)
        payload["artifacts"] = artifacts_by_manifest.get(payload["manifest_id"], [])
        manifest_payloads.append(payload)
    return {
        "calibration_dataset": [dict(row) for row in datasets],
        "drift_reports": drift_payloads,
        "phase3_manifests": manifest_payloads,
        "raw_transcript_included": False,
        "clinical_claim_allowed": False,
    }


__all__ = [
    "SupervisionResearchConflictError",
    "SupervisionResearchError",
    "SupervisionResearchNotFoundError",
    "append_attention_snapshot",
    "append_curriculum_gap",
    "append_evaluation_comparison",
    "append_phase3_manifest",
    "append_teacher_disagreement",
    "read_research_view",
    "read_supervision_view",
]