#!/usr/bin/env python3
"""Prompt-observable v5.1 wrapper around the frozen geometric-v5 evaluator.

The expensive and representation-sensitive geometry implementation remains in
``eval_geometric05``.  This module changes only the supervision contract:

* online physical/annotation scores consume explicit v5.1 sidecar masks;
* unmasked GT dimensions are unknown, never model errors;
* full-GT reconstruction is retained as a diagnostic;
* the strict ``engineering_success`` alias refers only to the certified scope.

There is deliberately no fallback to the legacy ``fmfs.eligible`` field.  A
missing or malformed v5.1 manifest masks physical and annotation supervision.
"""

from __future__ import annotations

import copy
import math
from pathlib import Path
from typing import Any, Mapping, Sequence

import numpy as np

try:
    from . import eval_geometric05 as EV5
except ImportError:  # direct evaluator import
    import eval_geometric05 as EV5


METRIC_VERSION = "v5.1"
FMFS_VERSION = "fmfs-v5.1"
ENGINEERING_THRESHOLDS = dict(EV5.ENGINEERING_THRESHOLDS)
_SCOPE_NAMES = ("prompt", "full_gt", "certified")


def _unknown_component(reason: str, *, scope: str, **details: Any) -> dict[str, Any]:
    return EV5._component(None, False, reason, scope=scope, **details)


def _zero_component(reason: str, *, scope: str, **details: Any) -> dict[str, Any]:
    return EV5._component(0.0, True, reason, scope=scope, **details)


def _bool_mask(value: Any, length: int) -> list[bool] | None:
    if not isinstance(value, Sequence) or isinstance(value, (str, bytes)):
        return None
    if len(value) != length or any(type(item) is not bool for item in value):
        return None
    return list(value)


def _dimension_specs(sidecar: Mapping[str, Any] | None) -> tuple[list[dict[str, Any]], list[str]]:
    errors: list[str] = []
    dimensions = sidecar.get("dimensions") if isinstance(sidecar, Mapping) else None
    raw_items = dimensions.get("items") if isinstance(dimensions, Mapping) else None
    if not isinstance(raw_items, Sequence) or isinstance(raw_items, (str, bytes)):
        return [], ["missing_dimensions_items"]
    specs: list[dict[str, Any]] = []
    for position, raw in enumerate(raw_items):
        if not isinstance(raw, Mapping):
            errors.append(f"invalid_dimension_item:{position}")
            continue
        try:
            gt_index = int(raw.get("index", raw.get("gt_dimension_index")))
            value = float(raw.get("display_value", raw.get("value")))
        except (TypeError, ValueError):
            errors.append(f"invalid_dimension_value_or_index:{position}")
            continue
        family = str(raw.get("family") or "").lower()
        if family not in EV5.DIMENSION_FAMILIES or not math.isfinite(value):
            errors.append(f"invalid_dimension_family_or_value:{position}")
            continue
        specs.append(
            {
                "position": position,
                "id": str(raw.get("id") or f"d{position:03d}"),
                "gt_dimension_index": gt_index,
                "family": family,
                "value": abs(value),
                "reliable": bool(raw.get("reliable", True)),
            }
        )
    if len(specs) != len(raw_items):
        errors.append("dimension_inventory_not_total")
    return specs, errors


def _scope_contracts(sidecar: Mapping[str, Any] | None) -> dict[str, Any]:
    """Fail-closed parser for the v5.1 item-mask contract."""

    specs, errors = _dimension_specs(sidecar)
    length = len(specs)
    fmfs = sidecar.get("fmfs") if isinstance(sidecar, Mapping) else None
    valid_version = isinstance(fmfs, Mapping) and fmfs.get("version") == FMFS_VERSION
    if not valid_version:
        errors.append("missing_or_legacy_fmfs_contract")
    prompt = fmfs.get("prompt") if valid_version else None
    certified = fmfs.get("certified") if valid_version else None

    def parsed_mask(container: Any, key: str) -> list[bool] | None:
        return _bool_mask(container.get(key), length) if isinstance(container, Mapping) else None

    prompt_physical = parsed_mask(prompt, "physical_item_mask")
    prompt_annotation = parsed_mask(prompt, "annotation_item_mask")
    certified_physical = parsed_mask(certified, "physical_item_mask")
    certified_annotation = parsed_mask(certified, "annotation_item_mask")
    full_mask = [True] * length
    dimensions = sidecar.get("dimensions") if isinstance(sidecar, Mapping) else None
    full_eligible = bool(
        valid_version
        and specs
        and not errors
        and all(item["reliable"] for item in specs)
        and (
            not isinstance(dimensions, Mapping)
            or int(dimensions.get("reliable_count", length)) == length
        )
    )
    prompt_physical_eligible = bool(
        isinstance(prompt, Mapping)
        and prompt.get("physical_eligible")
        and prompt_physical is not None
        and any(prompt_physical)
        and not errors
    )
    prompt_annotation_eligible = bool(
        isinstance(prompt, Mapping)
        and prompt.get("annotation_eligible")
        and prompt_annotation is not None
        and any(prompt_annotation)
        and not errors
    )
    certified_eligible = bool(
        isinstance(certified, Mapping)
        and certified.get("eligible")
        and certified.get("status") == "certified"
        and certified_physical is not None
        and certified_annotation is not None
        and any(certified_physical)
        and any(certified_annotation)
        and not errors
    )
    return {
        "valid": valid_version and not errors,
        "errors": errors,
        "n_dimension_items": length,
        "specs": specs,
        "prompt": {
            "physical_eligible": prompt_physical_eligible,
            "annotation_eligible": prompt_annotation_eligible,
            "physical_mask": prompt_physical or [False] * length,
            "annotation_mask": prompt_annotation or [False] * length,
            "reason_codes": list(prompt.get("reason_codes", [])) if isinstance(prompt, Mapping) else [],
        },
        "full_gt": {
            "physical_eligible": full_eligible,
            "annotation_eligible": full_eligible,
            "physical_mask": full_mask if full_eligible else [False] * length,
            "annotation_mask": full_mask if full_eligible else [False] * length,
            "reason_codes": [] if full_eligible else ["full_gt_dimension_inventory_ineligible"],
        },
        "certified": {
            "physical_eligible": certified_eligible,
            "annotation_eligible": certified_eligible,
            "physical_mask": certified_physical or [False] * length,
            "annotation_mask": certified_annotation or [False] * length,
            "status": certified.get("status", "unknown") if isinstance(certified, Mapping) else "unknown",
            "reason_codes": list(certified.get("reason_codes", [])) if isinstance(certified, Mapping) else [],
        },
    }


def _pair_context(pred: str | Path, gt: str | Path) -> dict[str, Any]:
    pred_path, gt_path = Path(pred), Path(gt)
    pred_meta, gt_meta = EV5._read_structure(pred_path), EV5._read_structure(gt_path)
    raw_gt = EV5._extract_entities(gt_path) if gt_meta.get("readable") else None
    target_valid = bool(
        raw_gt is not None
        and EV5._n_geometry(raw_gt) > 0
        and EV5._safe_bbox(raw_gt) is not None
    )
    raw_pred = EV5._extract_entities(pred_path) if pred_meta.get("readable") else None
    prediction_valid = bool(
        raw_pred is not None
        and EV5._n_geometry(raw_pred) > 0
        and EV5._safe_bbox(raw_pred) is not None
    )
    context: dict[str, Any] = {
        "target_valid": target_valid,
        "prediction_valid": prediction_valid,
        "pred_meta": pred_meta,
        "gt_meta": gt_meta,
        "raw_pred": raw_pred,
        "raw_gt": raw_gt,
    }
    if not target_valid or not prediction_valid:
        return context
    canonical_pred = EV5.EV4.canonicalize_entities(raw_pred)
    canonical_gt = EV5.EV4.canonicalize_entities(raw_gt)
    source_center, target_center, global_scale = EV5.EV3.shared_alignment(
        canonical_pred, canonical_gt
    )
    context.update(
        {
            "canonical_pred": canonical_pred,
            "canonical_gt": canonical_gt,
            "source_center": source_center,
            "target_center": target_center,
            "global_scale": global_scale,
        }
    )
    return context


def _selected_specs(contract: Mapping[str, Any], mask: Sequence[bool]) -> list[dict[str, Any]]:
    return [dict(spec) for spec, selected in zip(contract.get("specs", []), mask) if selected]


def _masked_component(
    context: Mapping[str, Any],
    contract: Mapping[str, Any],
    mask: Sequence[bool],
    *,
    eligible: bool,
    scope: str,
    component_name: str,
) -> dict[str, Any]:
    selected = _selected_specs(contract, mask)
    item_ids = [item["id"] for item in selected]
    if not context.get("target_valid"):
        return _unknown_component(
            "target_dxf_unreadable_or_degenerate", scope=scope, item_ids=item_ids
        )
    if not eligible or not selected:
        return _unknown_component(
            "sidecar_item_mask_ineligible",
            scope=scope,
            item_ids=item_ids,
            contract_errors=list(contract.get("errors", [])),
        )
    if not context.get("prediction_valid"):
        return _zero_component(
            "prediction_dxf_unreadable_or_degenerate", scope=scope, item_ids=item_ids
        )

    raw_gt = context["raw_gt"]
    gt_dims = list(raw_gt.get("dims", []))
    selected_dims: list[Any] = []
    local_specs: list[dict[str, Any]] = []
    for local_index, spec in enumerate(selected):
        gt_index = int(spec["gt_dimension_index"])
        if not 0 <= gt_index < len(gt_dims):
            return _unknown_component(
                "sidecar_gt_dimension_index_out_of_range",
                scope=scope,
                item_ids=item_ids,
                bad_gt_dimension_index=gt_index,
            )
        selected_dims.append(gt_dims[gt_index])
        local = dict(spec)
        local["gt_dimension_index"] = local_index
        local_specs.append(local)

    target_subset = dict(raw_gt)
    target_subset["dims"] = selected_dims
    _annotation, annotation_diagnostics = EV5._annotation_component(
        context["raw_pred"],
        target_subset,
        np.asarray(context["source_center"]),
        np.asarray(context["target_center"]),
        float(context["global_scale"]),
        context["pred_meta"],
    )
    raw_fmfs = EV5._fmfs_diagnostics(
        {
            "fmfs": {
                "eligible": True,
                "fully_derivable": scope == "certified",
                "items": local_specs,
            }
        },
        context["canonical_pred"],
        annotation_diagnostics,
    )
    rows = list(raw_fmfs.get("items", []))
    item_scores: list[dict[str, Any]] = []
    qualities: list[float] = []
    for position, spec in enumerate(selected):
        row = rows[position] if position < len(rows) and isinstance(rows[position], Mapping) else {}
        value_quality = float(row.get("value_quality", 0.0) or 0.0)
        type_quality = float(row.get("type_quality", 0.0) or 0.0)
        binding_quality = float(row.get("binding_quality", 0.0) or 0.0)
        internal_binding = float(row.get("internal_binding_quality", 0.0) or 0.0)
        scale_quality = float(row.get("scale_quality", 0.0) or 0.0)
        physical_quality = value_quality * binding_quality * internal_binding * scale_quality
        annotation_quality = type_quality * value_quality * binding_quality * internal_binding * scale_quality
        quality = physical_quality if component_name == "physical" else annotation_quality
        quality = max(0.0, min(1.0, quality))
        qualities.append(quality)
        item_scores.append(
            {
                "id": spec["id"],
                "gt_dimension_index": spec["gt_dimension_index"],
                "score": EV5._round(quality),
                "physical_quality": EV5._round(physical_quality),
                "annotation_quality": EV5._round(annotation_quality),
                "raw": dict(row),
            }
        )
    score = float(np.mean(qualities)) if qualities else 0.0
    return EV5._component(
        score,
        True,
        "ok" if score >= ENGINEERING_THRESHOLDS[component_name] else f"masked_{component_name}_mismatch",
        scope=scope,
        item_ids=item_ids,
        n_items=len(item_ids),
        items=item_scores,
        raw_fmfs=raw_fmfs,
        unmasked_prediction_dimensions_ignored=True,
    )


def _scope_components(
    context: Mapping[str, Any], contract: Mapping[str, Any], scope: str
) -> dict[str, dict[str, Any]]:
    scope_contract = contract[scope]
    return {
        "physical": _masked_component(
            context,
            contract,
            scope_contract["physical_mask"],
            eligible=bool(scope_contract["physical_eligible"]),
            scope=scope,
            component_name="physical",
        ),
        "annotation": _masked_component(
            context,
            contract,
            scope_contract["annotation_mask"],
            eligible=bool(scope_contract["annotation_eligible"]),
            scope=scope,
            component_name="annotation",
        ),
    }


def _pass(component: Mapping[str, Any], name: str) -> bool | None:
    if not component.get("eligible") or not isinstance(component.get("score"), (int, float)):
        return None
    return bool(float(component["score"]) >= ENGINEERING_THRESHOLDS[name])


def _tri_and(states: Sequence[bool | None]) -> bool | None:
    if any(value is False for value in states):
        return False
    if states and all(value is True for value in states):
        return True
    return None


def _benchmark_scope(
    base_benchmark: Mapping[str, Any],
    scope_components: Mapping[str, Mapping[str, Any]],
    *,
    target_eligible: bool,
) -> dict[str, Any]:
    physical_pass = _pass(scope_components["physical"], "physical") if target_eligible else None
    annotation_pass = _pass(scope_components["annotation"], "annotation") if target_eligible else None
    states = {
        "three_views": base_benchmark.get("three_views"),
        "geometry_pass": base_benchmark.get("geometry_pass"),
        "physical_pass": physical_pass,
        "annotation_pass": annotation_pass,
        "layout_pass": base_benchmark.get("layout_pass"),
        "structure_pass": base_benchmark.get("structure_pass"),
    }
    success = _tri_and(list(states.values())) if target_eligible else None
    return {
        **states,
        "target_eligible": bool(target_eligible),
        "fully_evaluable": bool(target_eligible and all(value is not None for value in states.values())),
        "engineering_success": success,
    }


def score_dxf_pair(
    pred: str | Path,
    gt: str | Path,
    sidecar: Mapping[str, Any] | None = None,
    category: str | None = None,
    **_kwargs: Any,
) -> dict[str, Any]:
    """Score a pair with prompt-masked online P/A and certified strict success."""

    base = EV5.score_dxf_pair(pred, gt, sidecar=sidecar, category=category)
    result = copy.deepcopy(base)
    contract = _scope_contracts(sidecar)
    context = _pair_context(pred, gt)

    # Prompt masking intentionally ignores dimensions outside the observable
    # contract, but it must not make arbitrary detached DIMENSION/TEXT spam
    # free. Preserve the frozen v5 duplicate diagnostics and expose the
    # broader unmatched count through the same capped anti-hack channel.
    annotation_details = (
        base.get("components", {}).get("annotation", {}).get("details", {})
    )
    if not isinstance(annotation_details, Mapping):
        annotation_details = {}
    try:
        predicted_dimension_count = max(
            0,
            int(annotation_details.get("n_pred_native", 0) or 0)
            + int(annotation_details.get("n_pred_text_only", 0) or 0),
        )
        matched_dimension_count = max(
            0, int(annotation_details.get("matched_by_binding", 0) or 0)
        )
    except (TypeError, ValueError):
        predicted_dimension_count = 0
        matched_dimension_count = 0
    unmatched_dimension_count = max(
        0, predicted_dimension_count - matched_dimension_count
    )
    anti_hack = result.get("anti_hack")
    if not isinstance(anti_hack, dict):
        anti_hack = {}
        result["anti_hack"] = anti_hack
    true_duplicate_count = float(
        anti_hack.get("duplicate_dimension_count", 0.0) or 0.0
    )
    true_duplicate_ratio = float(
        anti_hack.get("duplicate_dimension_ratio", 0.0) or 0.0
    )
    unmatched_ratio = unmatched_dimension_count / max(predicted_dimension_count, 1)
    anti_hack["true_duplicate_dimension_count"] = true_duplicate_count
    anti_hack["true_duplicate_dimension_ratio"] = true_duplicate_ratio
    anti_hack["unmatched_dimension_count"] = unmatched_dimension_count
    anti_hack["unmatched_dimension_ratio"] = unmatched_ratio
    anti_hack["dimension_spam_count"] = max(true_duplicate_count, unmatched_dimension_count)
    anti_hack["dimension_spam_ratio"] = max(true_duplicate_ratio, unmatched_ratio)
    anti_hack["duplicate_dimension_count"] = anti_hack["dimension_spam_count"]
    anti_hack["duplicate_dimension_ratio"] = anti_hack["dimension_spam_ratio"]
    if unmatched_dimension_count:
        flags = anti_hack.setdefault("flags", [])
        if "unmatched_dimension_entities" not in flags:
            flags.append("unmatched_dimension_entities")

    scopes = {
        name: _scope_components(context, contract, name) for name in _SCOPE_NAMES
    }

    prompt = scopes["prompt"]
    result["metric_version"] = METRIC_VERSION
    result["components"]["physical"] = prompt["physical"]
    result["components"]["annotation"] = prompt["annotation"]
    result["online_reward"] = {
        "scope": "prompt",
        "components": {
            name: result["components"][name]
            for name in ("view", "geometry", "physical", "annotation", "layout", "structure")
        },
    }

    base_benchmark = dict(base.get("benchmark", {}))
    view_count_ok = bool(
        isinstance(sidecar, Mapping)
        and isinstance(sidecar.get("views"), Mapping)
        and sidecar["views"].get("candidate_count") == EV5.VIEW_TARGET_COUNT
    )
    target_valid = bool(context.get("target_valid"))
    scope_benchmarks: dict[str, Any] = {}
    for name in _SCOPE_NAMES:
        scope_contract = contract[name]
        target_eligible = bool(
            target_valid
            and view_count_ok
            and scope_contract["physical_eligible"]
            and scope_contract["annotation_eligible"]
        )
        scope_benchmarks[name] = _benchmark_scope(
            base_benchmark, scopes[name], target_eligible=target_eligible
        )

    certified = scope_benchmarks["certified"]
    benchmark = dict(base_benchmark)
    benchmark.update(
        {
            "physical_pass": certified["physical_pass"],
            "annotation_pass": certified["annotation_pass"],
            "engineering_eligible": certified["target_eligible"],
            "engineering_success": certified["engineering_success"],
            "cad_pass": certified["engineering_success"],
            "strict_scope": "certified",
            "scopes": scope_benchmarks,
            "thresholds": dict(ENGINEERING_THRESHOLDS),
        }
    )
    result["benchmark"] = benchmark
    result["engineering_eligible"] = certified["target_eligible"]
    result["engineering_success"] = certified["engineering_success"]
    result["diagnostics"]["v5_base_physical"] = base["components"]["physical"]
    result["diagnostics"]["v5_base_annotation"] = base["components"]["annotation"]
    result["diagnostics"]["fmfs_v51"] = {
        "contract": {
            key: value
            for key, value in contract.items()
            if key != "specs"
        },
        "scopes": scopes,
        "strict_scope": "certified",
        "legacy_fmfs_fallback": False,
    }
    return result


__all__ = [
    "ENGINEERING_THRESHOLDS",
    "FMFS_VERSION",
    "METRIC_VERSION",
    "score_dxf_pair",
]