"""Smoke test: loads the real checkpoints, stubs out EmbeddingGemma, and runs the
full chain on CPU. Needs no HF token and downloads nothing.

    PHYSH_WEIGHTS_DIR=../physh_topic_supervised_classifier python test_local.py
"""

import os

os.environ.setdefault(
    "PHYSH_WEIGHTS_DIR",
    os.path.join(os.path.dirname(os.path.abspath(__file__)), "..", "physh_topic_supervised_classifier"),
)

import numpy as np
import torch

import app


class FakeEmbedder:
    """Stands in for SentenceTransformer: deterministic unit-norm vectors."""

    def to(self, device):
        return self

    def encode(self, text, prompt=None, convert_to_numpy=True):
        rng = np.random.default_rng(abs(hash(text)) % (2**32))
        v = rng.normal(size=768).astype("float32")
        return v / np.linalg.norm(v)  # EmbeddingGemma returns L2-normalised vectors


app._EMBEDDER = FakeEmbedder()

print("disciplines:", len(app.DISCIPLINE_LABELS), "concepts:", len(app.CONCEPT_LABELS))
print("remap is identity:", torch.equal(app._REMAP, torch.arange(18)))
print("concept head in_features:", app.CONCEPT_MODEL.network[0].in_features)
import sys
print("real `spaces` package in use:", "spaces" in sys.modules)

d, c, summary = app.classify(app.EXAMPLES[0], 0.5, app.DEFAULT_PROMPT, 8)
assert len(d) == 8 and len(c) == 8, (len(d), len(c))
assert all(0.0 <= v <= 1.0 for v in {**d, **c}.values())
print("\ntop disciplines:", [f"{k} {v:.3f}" for k, v in d.items()][:3])
print("top concepts:   ", [f"{k} {v:.3f}" for k, v in c.items()][:3])

# dropout must be off, so repeat calls agree
d2, _, _ = app.classify(app.EXAMPLES[0], 0.5, app.DEFAULT_PROMPT, 8)
assert d == d2, "eval() mode not applied — outputs are not deterministic"

# empty input, and every prompt format
assert app.classify("   ", 0.5, app.DEFAULT_PROMPT, 8)[0] == {}
for p in app.PROMPT_TEMPLATES:
    app.classify("test abstract", 0.5, p, 5)

# the GPU-decorated entry point returns plain lists (ZeroGPU pickles them)
dl, cl = app.infer("test", app.PROMPT_TEMPLATES[app.DEFAULT_PROMPT])
assert isinstance(dl, list) and isinstance(cl, list) and len(dl) == 18 and len(cl) == 186
assert all(isinstance(x, float) for x in dl)

# a missing embedder must surface as a readable error, not an AttributeError
app._EMBEDDER, app._EMBEDDER_ERROR = None, "401 gated repo"
try:
    app.infer("test", "{}")
    raise SystemExit("FAIL: expected a gr.Error when the embedder is missing")
except Exception as exc:
    assert "HF_TOKEN" in str(exc), exc
app._EMBEDDER = FakeEmbedder()

print("\nOK: deterministic, empty input handled, all prompt formats run,")
print("    infer() returns picklable lists, missing-token error is readable.")
print("gradio Blocks built OK:", app.demo is not None)