"""MacroLens — public unified API (v0.2).

The 10-line workflow::

    import macrolens as ml

    X_train, y_train, meta_train = ml.load("T1", "train", granularity="daily")
    X_test,  y_test,  meta_test  = ml.load("T1", "test")

    model = ml.methods.LightGBMRegressor(task="T1")
    model.fit(X_train, y_train, seed=42)
    y_pred = model.predict(X_test)

    metrics = ml.score("T1", y_test, y_pred,
                       cluster_keys=meta_test["ticker"].values)
    print(metrics["mse"].value, metrics["mse"].ci_lo, metrics["mse"].ci_hi)

Public surface
--------------

* :func:`load` — sklearn-style ``(X, y, meta)`` data layer.
* :func:`score` / :func:`compare_methods` — eval layer.
* :func:`info` / :func:`features` — benchmark metadata.
* :func:`list_methods` — registered method names (filterable by family / task).
* :data:`methods` — sub-namespace; ``ml.methods.<ClassName>(task=...)``.
* :class:`LoadedData`, :class:`MetricValue`, :class:`RunRecord` — types.

Legacy v0.1 entry points (``load_tsf``, ``to_arrays``, ``evaluate``,
``ask_lumina``, ...) remain importable during the v0.1 → v0.2 transition;
they will be removed in Phase 7.
"""

from __future__ import annotations

# ── v0.2 unified API (primary surface) ────────────────────────────────────
from . import methods  # noqa: F401  (sub-namespace; ml.methods.<Name>)
from ._types import LoadedData, MetricValue, RunRecord
from .data import load
from .eval import compare_methods, score
from .meta import BENCHMARK_NAME, __version__, features, info
from .methods import ALL_METHODS, list_methods


# ── Legacy v0.1 entry points (transitional) ───────────────────────────────
# These are imported lazily below so the new public surface stays usable
# even when the legacy modules grow new dependencies. Failures during the
# transitional period are captured and surfaced as ImportError on first
# attribute access (rather than crashing every ``import macrolens`` call).
def _import_legacy() -> dict[str, object]:
    out: dict[str, object] = {}
    try:
        from ._evaluate import evaluate, format_submission
        out["evaluate"] = evaluate
        out["format_submission"] = format_submission
    except Exception:  # pragma: no cover -- legacy module surface drift
        pass
    try:
        from ._fast import TSFTorchDataset, load_torch, to_arrays
        out["TSFTorchDataset"] = TSFTorchDataset
        out["load_torch"] = load_torch
        out["to_arrays"] = to_arrays
        # legacy `features` function on _fast shadowed by meta.features in
        # the v0.2 surface; expose under a private alias for back-compat.
        from ._fast import features as _legacy_features
        out["_legacy_features"] = _legacy_features
    except Exception:  # pragma: no cover
        pass
    try:
        from ._loaders import load_panel, load_scenarios, load_task, load_tsf
        out["load_panel"] = load_panel
        out["load_scenarios"] = load_scenarios
        out["load_task"] = load_task
        out["load_tsf"] = load_tsf
    except Exception:  # pragma: no cover
        pass
    try:
        from ._meta import BENCHMARK_VERSION
        out["BENCHMARK_VERSION"] = BENCHMARK_VERSION
    except Exception:  # pragma: no cover
        pass
    try:
        from ._types import (
            BenchmarkInfo,
            GenerationMetrics,
            REValuationMetrics,
            ScenarioMetrics,
            TaskSample,
            TSFMetrics,
            TSFSample,
            ValuationMetrics,
        )
        out["BenchmarkInfo"] = BenchmarkInfo
        out["GenerationMetrics"] = GenerationMetrics
        out["REValuationMetrics"] = REValuationMetrics
        out["ScenarioMetrics"] = ScenarioMetrics
        out["TaskSample"] = TaskSample
        out["TSFMetrics"] = TSFMetrics
        out["TSFSample"] = TSFSample
        out["ValuationMetrics"] = ValuationMetrics
    except Exception:  # pragma: no cover
        pass
    return out


_LEGACY = _import_legacy()


def __getattr__(name: str):
    """Resolve legacy attributes lazily (and ``ask_lumina`` even more so)."""
    if name in _LEGACY:
        return _LEGACY[name]
    if name == "ask_lumina":
        # The lumina agent imports openrouter / vector store deps that may
        # not be installed in CPU-only paper-scope environments. Defer the
        # import to first call.
        from ..agents.lumina import ask as ask_lumina
        return ask_lumina
    if name == "lakehouse":
        def _lakehouse(tag: str = "macrolens-v1.0"):
            from ..lakehouse import Client
            return Client.from_release(tag)
        return _lakehouse
    raise AttributeError(f"module 'macrolens' has no attribute {name!r}")


__all__ = [
    # v0.2 unified API
    "load",
    "score",
    "compare_methods",
    "info",
    "features",
    "list_methods",
    "methods",
    "ALL_METHODS",
    "LoadedData",
    "MetricValue",
    "RunRecord",
    "BENCHMARK_NAME",
    "__version__",
    # legacy (lazy)
    "evaluate",
    "format_submission",
    "TSFTorchDataset",
    "load_torch",
    "to_arrays",
    "load_panel",
    "load_scenarios",
    "load_task",
    "load_tsf",
    "ask_lumina",
    "lakehouse",
    "BENCHMARK_VERSION",
    "BenchmarkInfo",
    "GenerationMetrics",
    "REValuationMetrics",
    "ScenarioMetrics",
    "TaskSample",
    "TSFMetrics",
    "TSFSample",
    "ValuationMetrics",
]