"""Calibration runner: generate-outputs | run-judges | build-table.

Orchestrates Steps A, C, D from the design doc's data flow. Step B
(hand-labeling) is manual — done in a Jupyter notebook reading
results/calibration_v1_system_outputs.json and appending to
measurements/2026-05-04-judge-calibration-labels.jsonl.

Examples:
    python scripts/run_calibration.py generate-outputs --concurrency 5
    python scripts/run_calibration.py run-judges --row-config=configs/calibration/rows/baseline.yaml
    python scripts/run_calibration.py build-table
    python scripts/run_calibration.py build-table --strict
"""

from __future__ import annotations

import argparse
import asyncio
import hashlib
import json
from pathlib import Path

import structlog
import yaml

logger = structlog.get_logger()

REPO = Path(__file__).resolve().parents[1]
CALIBRATION_SPEC = REPO / "agent_bench/evaluation/datasets/calibration_v1.json"
SYSTEM_OUTPUTS = REPO / "results/calibration_v1_system_outputs.json"
LABELS_PATH = REPO / "measurements/2026-05-04-judge-calibration-labels.jsonl"
KAPPA_TABLE_OUT = REPO / "docs/_generated/kappa_table.md"


def _resolve_concurrency(cli_value: int | None) -> int:
    """CLI flag overrides config field; default is 5. Logs the resolved value."""
    if cli_value is not None:
        resolved = cli_value
    else:
        cfg_path = REPO / "configs/default.yaml"
        cfg_concurrency = None
        if cfg_path.exists():
            cfg = yaml.safe_load(cfg_path.read_text()) or {}
            cfg_concurrency = (cfg.get("evaluation", {}) or {}).get(
                "calibration_concurrency"
            )
        resolved = cfg_concurrency if cfg_concurrency is not None else 5
    logger.info("calibration_concurrency_resolved", value=resolved)
    return resolved


# --- Subcommand: generate-outputs (Step A) ---


def _build_corpus_orchestrator(cfg, corpus_name: str, embedder, provider):
    """Build a per-corpus Orchestrator wired to that corpus's HybridStore.

    Mirrors the per-corpus construction in scripts/evaluate.py so calibration
    runs use the same retrieval stack as production evaluation. The embedder
    and provider are shared across corpora — only the store/retriever/
    SearchTool differ.
    """
    from agent_bench.agents.orchestrator import Orchestrator
    from agent_bench.rag.retriever import Retriever
    from agent_bench.rag.store import HybridStore
    from agent_bench.tools.calculator import CalculatorTool
    from agent_bench.tools.registry import ToolRegistry
    from agent_bench.tools.search import SearchTool

    corpus_cfg = cfg.corpora[corpus_name]
    store = HybridStore.load(corpus_cfg.store_path, rrf_k=cfg.rag.retrieval.rrf_k)
    reranker = None
    if cfg.rag.reranker.enabled:
        from agent_bench.rag.reranker import CrossEncoderReranker

        reranker = CrossEncoderReranker(model_name=cfg.rag.reranker.model_name)
    retriever = Retriever(
        embedder=embedder,
        store=store,
        default_strategy=cfg.rag.retrieval.strategy,
        candidates_per_system=cfg.rag.retrieval.candidates_per_system,
        reranker=reranker,
        reranker_top_k=cfg.rag.reranker.top_k,
    )
    registry = ToolRegistry()
    registry.register(
        SearchTool(
            retriever=retriever,
            default_top_k=cfg.rag.retrieval.top_k,
            refusal_threshold=corpus_cfg.refusal_threshold,
        )
    )
    registry.register(CalculatorTool())
    return Orchestrator(
        provider=provider,
        registry=registry,
        max_iterations=cfg.agent.max_iterations,
        temperature=cfg.agent.temperature,
    )


async def cmd_generate_outputs(concurrency: int) -> None:
    """Run the orchestrator against the 30 calibration items with a frozen
    configuration; write results/calibration_v1_system_outputs.json.

    The calibration spec is mixed-corpus (k8s + fastapi). Each item carries a
    `corpus` field; we build one Orchestrator per corpus and route by that
    field. A KeyError on an unrecognized corpus is preferable to silently
    misrouting an item to the wrong store.
    """
    from agent_bench.core.config import load_config
    from agent_bench.core.provider import AnthropicProvider
    from agent_bench.evaluation.harness import load_golden_dataset
    from agent_bench.rag.embedder import Embedder

    spec = json.loads(CALIBRATION_SPEC.read_text())
    target_ids = {i["id"]: i for i in spec["items"]}

    fastapi = load_golden_dataset(
        REPO / "agent_bench/evaluation/datasets/tech_docs_golden.json"
    )
    k8s = load_golden_dataset(
        REPO / "agent_bench/evaluation/datasets/k8s_golden.json"
    )
    items = [q for q in (fastapi + k8s) if q.id in target_ids]
    if len(items) != len(target_ids):
        missing = set(target_ids) - {q.id for q in items}
        raise SystemExit(
            f"calibration items not found in goldens: {sorted(missing)}"
        )

    cfg = load_config()
    provider = AnthropicProvider(cfg)
    embedder = Embedder(model_name=cfg.embedding.model, cache_dir=cfg.embedding.cache_dir)

    item_corpus = {it.id: target_ids[it.id]["corpus"] for it in items}
    unknown: dict[str, list[str]] = {}
    for it_id, corpus in item_corpus.items():
        if corpus not in cfg.corpora:
            unknown.setdefault(corpus, []).append(it_id)
    if unknown:
        examples = "; ".join(
            f"{cor!r}: {sorted(ids)[:3]}" for cor, ids in sorted(unknown.items())
        )
        raise KeyError(
            f"calibration spec references corpora not in cfg.corpora — "
            f"{examples}; configured corpora: {sorted(cfg.corpora)!r}"
        )

    corpora_needed = sorted(set(item_corpus.values()))
    orchestrators = {
        name: _build_corpus_orchestrator(cfg, name, embedder, provider)
        for name in corpora_needed
    }

    sem = asyncio.Semaphore(concurrency)

    async def _run_one(item):
        async with sem:
            response = await orchestrators[item_corpus[item.id]].run(
                question=item.question,
                system_prompt="You are a helpful assistant.",
            )
            answer = response.answer
            sources = sorted(s.source for s in response.sources)
            sys_hash = hashlib.sha256(
                f"{item.id}\x00{answer}\x00{','.join(sources)}".encode("utf-8")
            ).hexdigest()
            return {
                "item_id": item.id,
                "question": item.question,
                "category": item.category,
                "answer": answer,
                "sources": [s.source for s in response.sources],
                "ranked_sources": response.ranked_sources,
                "source_chunks": response.source_chunks,
                "source_snippets": item.source_snippets,
                "reference_answer": item.reference_answer,
                "system_output_hash": sys_hash,
                "stratum": target_ids[item.id]["stratum"],
                "corpus": target_ids[item.id]["corpus"],
            }

    records = await asyncio.gather(*[_run_one(it) for it in items])
    SYSTEM_OUTPUTS.parent.mkdir(parents=True, exist_ok=True)
    SYSTEM_OUTPUTS.write_text(json.dumps(records, indent=2) + "\n")
    logger.info(
        "generate_outputs_complete", count=len(records), path=str(SYSTEM_OUTPUTS)
    )


# --- Subcommand: run-judges (Step C, one row per invocation) ---


def _make_provider(name: str, cfg, *, model: str | None = None):
    from agent_bench.core.provider import AnthropicProvider, OpenAIProvider

    if name == "anthropic":
        return AnthropicProvider(cfg, model=model)
    if name == "openai":
        return OpenAIProvider(cfg, model=model)
    raise ValueError(f"unknown provider: {name}")


def _make_judge(
    provider_name: str,
    model_id: str,
    dimension: str,
    cfg,
    *,
    use_cot: bool = True,
    use_anchors: bool = True,
    abstain_allowed_override: bool | None = None,
):
    from agent_bench.evaluation.judges.base import Rubric
    from agent_bench.evaluation.judges.citation_faithfulness import (
        CitationFaithfulnessJudge,
    )
    from agent_bench.evaluation.judges.completeness import CompletenessJudge
    from agent_bench.evaluation.judges.groundedness import GroundednessJudge
    from agent_bench.evaluation.judges.relevance import RelevanceJudge

    judge_class = {
        "groundedness": GroundednessJudge,
        "relevance": RelevanceJudge,
        "completeness": CompletenessJudge,
        "citation_faithfulness": CitationFaithfulnessJudge,
    }
    rubric_dir = REPO / "agent_bench/evaluation/rubrics"
    rubric = Rubric.from_markdown_file(rubric_dir / f"{dimension}.md")
    if not use_anchors:
        # Strip ### Example sections — body_markdown changes, so
        # ScoreResult.rubric_version naturally distinguishes anchored vs
        # stripped variants when the calibration report buckets results.
        rubric = rubric.strip_anchors()
    return judge_class[dimension](
        judge_provider=_make_provider(provider_name, cfg, model=model_id),
        rubric=rubric,
        model_id=model_id,
        use_cot=use_cot,
        abstain_allowed_override=abstain_allowed_override,
    )


def _row_judge_options(row: dict) -> dict:
    """Pull `options` from a row config and project to _make_judge kwargs.

    Defaults (when keys are missing) match the baseline contract: CoT on,
    anchors on, abstain follows the rubric (no override).
    """
    opts = row.get("options") or {}
    abstain_allowed = opts.get("abstain_allowed")
    return {
        "use_cot": bool(opts.get("use_cot", True)),
        "use_anchors": bool(opts.get("use_anchors", True)),
        # None = follow rubric; explicit True/False = override
        "abstain_allowed_override": (
            None if abstain_allowed is None else bool(abstain_allowed)
        ),
    }


def _build_item_and_output(rec: dict):
    from agent_bench.agents.orchestrator import AgentResponse, SourceReference
    from agent_bench.core.types import TokenUsage
    from agent_bench.evaluation.harness import GoldenQuestion

    item = GoldenQuestion(
        id=rec["item_id"],
        question=rec["question"],
        expected_answer_keywords=[],
        expected_sources=[],
        category=rec["category"],
        difficulty="easy",
        requires_calculator=False,
        source_snippets=rec.get("source_snippets", []),
        reference_answer=rec.get("reference_answer", ""),
    )
    output = AgentResponse(
        answer=rec["answer"],
        sources=[SourceReference(source=s) for s in rec["sources"]],
        ranked_sources=rec.get("ranked_sources", []),
        source_chunks=rec.get("source_chunks", []),
        iterations=1,
        usage=TokenUsage(input_tokens=0, output_tokens=0, estimated_cost_usd=0),
        latency_ms=0,
    )
    return item, output


async def cmd_run_judges(row_config_path: Path, concurrency: int) -> None:
    """Score the frozen system outputs with the row's judge configuration."""
    from agent_bench.core.config import load_config
    from agent_bench.evaluation.variance.jury import jury
    from agent_bench.evaluation.variance.rubric_permute import rubric_permute

    if not SYSTEM_OUTPUTS.exists():
        raise SystemExit(
            f"{SYSTEM_OUTPUTS} not found — run `generate-outputs` first."
        )
    row = yaml.safe_load(row_config_path.read_text())
    outputs = json.loads(SYSTEM_OUTPUTS.read_text())

    cfg = load_config()
    sem = asyncio.Semaphore(concurrency)
    all_results: list[dict] = []
    strategy = row["strategy"]

    def _skip_oos(rec: dict, dim: str) -> bool:
        return rec["category"] == "out_of_scope" and dim != "relevance"

    judge_opts = _row_judge_options(row)

    if strategy == "single":
        # Build one judge per dimension up-front, then gather all
        # (dim, item) pairs in a single asyncio.gather call. Previous
        # design serialized across dimensions (each dim awaited fully
        # before the next started), leaving Phase-11 wall-clock on the
        # table when the calibration spend is API-rate-limited.
        judges_by_dim = {
            dim: _make_judge(
                row["provider"], row["model_id"], dim, cfg, **judge_opts
            )
            for dim in row["dimensions"]
        }

        async def score_one(rec: dict, dim: str, judge):
            async with sem:
                if _skip_oos(rec, dim):
                    return None
                item, output = _build_item_and_output(rec)
                result = await judge.score(item, output)
                return {"item_id": rec["item_id"], "dimension": dim, **result.model_dump()}

        coros = [
            score_one(rec, dim, judge)
            for dim, judge in judges_by_dim.items()
            for rec in outputs
        ]
        gathered = await asyncio.gather(*coros)
        all_results.extend([r for r in gathered if r is not None])

    elif strategy == "rubric_permute":
        # Sequential per-item by design: PermutedJudge writes to the
        # sidecar JSONL with append mode and within-call ordering matters
        # for downstream per-permutation analysis (the kappa_table joins
        # by item_id but the sidecar order encodes the permutation seed
        # sequence). Across-dim parallelism is left for v1.1 once the
        # sidecar contract proves stable.
        for dim in row["dimensions"]:
            judge = _make_judge(
                row["provider"], row["model_id"], dim, cfg, **judge_opts
            )
            sidecar = REPO / row.get(
                "sidecar_path", "results/calibration_v1_permute_members.jsonl"
            )
            permuted = rubric_permute(
                judge,
                n=row["options"]["n_permutations"],
                seeds=row["options"]["seeds"],
                sidecar_path=sidecar,
            )
            for rec in outputs:
                if _skip_oos(rec, dim):
                    continue
                item, output = _build_item_and_output(rec)
                result = await permuted.score(item, output)
                all_results.append({"item_id": rec["item_id"], "dimension": dim, **result.model_dump()})

    elif strategy == "jury":
        # Same sequential rationale as rubric_permute: jury writes a
        # per-member sidecar and downstream analysis benefits from stable
        # ordering. The asyncio.gather inside Jury.score does parallelize
        # member calls within an item; the across-item / across-dim
        # serialization is the conservative choice.
        for dim in row["dimensions"]:
            members = [
                _make_judge(m["provider"], m["model_id"], dim, cfg, **judge_opts)
                for m in row["members"]
            ]
            sidecar = REPO / row["sidecar_path"]
            weights = (
                _compute_kappa_weights(
                    REPO / row["weights_source"],
                    dim,
                    expected_judge_ids={m.judge_id for m in members},
                )
                if row.get("aggregation") == "kappa_weighted"
                else None
            )
            j = jury(
                judges=members,
                aggregation=row["aggregation"],
                weights=weights,
                quorum=row.get("quorum"),
                sidecar_path=sidecar,
            )
            for rec in outputs:
                if _skip_oos(rec, dim):
                    continue
                item, output = _build_item_and_output(rec)
                result = await j.score(item, output)
                all_results.append({"item_id": rec["item_id"], "dimension": dim, **result.model_dump()})
    else:
        raise SystemExit(f"unknown strategy: {strategy}")

    out_path = REPO / row["output_path"]
    out_path.parent.mkdir(parents=True, exist_ok=True)
    out_path.write_text(json.dumps(all_results, indent=2) + "\n")
    logger.info(
        "run_judges_complete",
        row=row["label"],
        count=len(all_results),
        path=str(out_path),
    )


def _compute_kappa_weights(
    predictions_path: Path,
    dimension: str,
    expected_judge_ids: set[str],
) -> dict[str, float]:
    """Compute per-judge weight = max(0, Cohen's κ vs gold labels) for the
    dimension, from a predictions file (JSON list or JSONL).

    v1.1 replaces v1's stub (which returned 1.0 for every judge_id seen,
    causing asymmetric coverage to amplify rather than suppress an
    unweighted member). Hard-errors if `predictions_path` is missing,
    if any `expected_judge_ids` member has no scored (non-abstain)
    predictions for `dimension`, or if no labels are available for the
    dimension.

    The κ → weight mapping clips negative κ to 0; a member with κ ≤ 0 on
    a dimension contributes weight 0 (effective exclusion via weighting).
    This is the "soft exclusion" behavior — explicit per-dimension
    exclusion is tracked separately on the v1.2 fix-list.

    Pragmatic v1.1: `predictions_path` may point at the same calibration
    set used for κ reporting (circular weighting); this is documented in
    the v1.1 jury-rescue DECISIONS entry. v1.2 will require a held-out
    validation set.
    """
    from agent_bench.evaluation.calibration.metrics import cohen_kappa

    if not predictions_path.exists():
        raise FileNotFoundError(
            f"weights source {predictions_path} does not exist; v1.1 "
            f"requires explicit κ-derived weights — no silent fallback"
        )

    # Load predictions: JSON list (baseline-style) or JSONL (sidecar-style).
    raw = predictions_path.read_text()
    if predictions_path.suffix == ".jsonl":
        preds = [json.loads(line) for line in raw.splitlines() if line.strip()]
    else:
        preds = json.loads(raw)

    if not LABELS_PATH.exists():
        raise FileNotFoundError(
            f"labels file {LABELS_PATH} does not exist; cannot compute "
            f"κ-derived weights"
        )
    labels: dict[str, int] = {}
    for line in LABELS_PATH.read_text().splitlines():
        if not line.strip():
            continue
        rec = json.loads(line)
        if rec.get("dimension") != dimension or rec.get("abstained"):
            continue
        labels[rec["system_output_hash"]] = int(rec["score"])

    if not labels:
        raise ValueError(
            f"no gold labels for dimension={dimension!r} in {LABELS_PATH}; "
            f"cannot compute κ-derived weights"
        )

    # Group predictions by judge_id, joining to labels by system_output_hash.
    # The sidecar JSONL has one record per (judge × item × dim); the baseline
    # JSON has the same. Both expose `judge_id` of the form `{model}_{dim}`,
    # `system_output_hash`, `score`, and (for the abstain-aware filter) the
    # `Unknown` sentinel.
    by_judge: dict[str, list[tuple[int, int]]] = {}
    for p in preds:
        # JSONL sidecar lacks `dimension` field; we filter by suffix on
        # judge_id instead, which encodes dimension.
        if not p["judge_id"].endswith(f"_{dimension}"):
            continue
        if p["score"] == "Unknown":
            continue
        h = p["system_output_hash"]
        if h not in labels:
            continue
        by_judge.setdefault(p["judge_id"], []).append(
            (labels[h], int(p["score"]))
        )

    missing = expected_judge_ids - by_judge.keys()
    if missing:
        raise ValueError(
            f"weights source {predictions_path} has no predictions for "
            f"expected judge_ids {sorted(missing)} on dimension={dimension!r}. "
            f"Source covers {sorted(by_judge.keys())}. v1.1 requires "
            f"symmetric coverage — point weights_source at a predictions "
            f"file containing every jury member's verdicts (e.g. the jury "
            f"sidecar from a prior run)."
        )

    weights: dict[str, float] = {}
    for jid in expected_judge_ids:
        pairs = by_judge[jid]
        y_lab = [a for a, _ in pairs]
        y_pred = [b for _, b in pairs]
        kappa = cohen_kappa(y_lab, y_pred)
        weights[jid] = max(0.0, kappa)
        logger.info(
            "kappa_weight_computed",
            judge_id=jid,
            dimension=dimension,
            kappa=kappa,
            weight=weights[jid],
            n=len(pairs),
        )
    return weights


# --- Subcommand: build-table (Step D) ---


def cmd_build_table(strict: bool) -> None:
    from agent_bench.evaluation.calibration.report import generate_kappa_table

    predictions_glob = str(REPO / "results/calibration_v1_judge_*.json")
    generate_kappa_table(
        predictions_glob=predictions_glob,
        labels_path=str(LABELS_PATH),
        output_path=str(KAPPA_TABLE_OUT),
        strict=strict,
    )
    logger.info("build_table_complete", path=str(KAPPA_TABLE_OUT), strict=strict)


def main() -> None:
    parser = argparse.ArgumentParser(
        description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter
    )
    sub = parser.add_subparsers(dest="cmd", required=True)

    p_gen = sub.add_parser(
        "generate-outputs", help="Step A: generate frozen system outputs"
    )
    p_gen.add_argument("--concurrency", type=int, default=None)

    p_run = sub.add_parser("run-judges", help="Step C: score one ablation row")
    p_run.add_argument("--row-config", type=Path, required=True)
    p_run.add_argument("--concurrency", type=int, default=None)

    p_tab = sub.add_parser(
        "build-table", help="Step D: aggregate predictions into κ table"
    )
    p_tab.add_argument(
        "--strict",
        action="store_true",
        help="Raise on missing predictions/labels (final-artifact path)",
    )

    args = parser.parse_args()
    if args.cmd == "generate-outputs":
        asyncio.run(cmd_generate_outputs(_resolve_concurrency(args.concurrency)))
    elif args.cmd == "run-judges":
        asyncio.run(
            cmd_run_judges(args.row_config, _resolve_concurrency(args.concurrency))
        )
    elif args.cmd == "build-table":
        cmd_build_table(strict=args.strict)


if __name__ == "__main__":
    main()