import numpy as np

import signspeak.asl.pipeline as asl_pipeline
from signspeak.asl.pipeline import build_intent_input, process_asl_frames
from signspeak.pipeline import apply_gloss_override, parse_gloss_override, resolve_video_path, summarize_asl_result


def test_build_intent_input_matches_llm_schema():
    asl = {
        "status": "ok",
        "gloss_sequence": ["I", "HAPPY", "SEE", "YOU"],
        "confidence": 0.91,
        "frames_used": 30,
    }
    emotion = {
        "status": "ok",
        "dominant_emotion": "happy",
        "intensity": 0.82,
        "emotion_scores": {"happy": 0.82, "neutral": 0.18},
    }

    intent = build_intent_input(asl, emotion)

    assert intent["detected_glosses"] == ["I", "HAPPY", "SEE", "YOU"]
    assert intent["detected_facial_expression"] == "happy"
    assert intent["emotion_profile"]["confidence"] == 0.82
    assert intent["sign_confidence"] == 0.91
    assert intent["diagnostics"]["asl_status"] == "ok"
    assert intent["sign_detection"]["accepted"] is True


def test_build_intent_input_exposes_rejected_top_prediction():
    asl = {
        "status": "low_confidence",
        "gloss_sequence": [],
        "top_prediction": "talk",
        "confidence": 0.138,
        "confidence_threshold": 0.70,
        "top_predictions": [{"label": "talk", "confidence": 0.138}],
        "frames_used": 30,
        "landmarks_status": "ok",
        "landmarks_detector": "holistic",
    }
    emotion = {
        "status": "ok",
        "dominant_emotion": "neutral",
        "intensity": 0.29,
        "emotion_scores": {"neutral": 0.29},
    }

    intent = build_intent_input(asl, emotion)

    assert intent["detected_glosses"] == []
    assert intent["sign_detection"]["accepted"] is False
    assert intent["sign_detection"]["top_prediction"] == "talk"
    assert intent["sign_detection"]["confidence_threshold"] == 0.70
    assert intent["diagnostics"]["top_prediction"] == "talk"


def test_process_asl_frames_preserves_detector_diagnostics(monkeypatch):
    class FakeASLDetector:
        def predict_sequence_from_frames(self, frames):
            return {
                "status": "ok",
                "gloss_sequence": ["talk"],
                "top_prediction": "talk",
                "confidence": 0.96,
                "confidence_threshold": 0.70,
                "top_predictions": [{"label": "talk", "confidence": 0.96}],
                "segment_predictions": [
                    {
                        "window_index": 0,
                        "start_frame": 0,
                        "end_frame": 8,
                        "label": "talk",
                        "confidence": 0.96,
                        "accepted": True,
                    }
                ],
                "frames_used": len(frames),
                "windows_used": 1,
                "sequence_window": 30,
                "sequence_stride": 15,
                "recognition_mode": "sliding_window_sequence",
                "keypoints_shape": [8, 543, 3],
                "landmarks_status": "ok",
                "landmarks_detector": "holistic",
            }

    monkeypatch.setattr(asl_pipeline, "ASLDetector", FakeASLDetector)
    monkeypatch.setenv("ASL_DETECTOR_BACKEND", "tflite")
    monkeypatch.setattr(
        asl_pipeline,
        "detect_emotion_on_frames",
        lambda frames: {
            "status": "ok",
            "dominant_emotion": "neutral",
            "intensity": 0.29,
            "emotion_scores": {"neutral": 0.29},
        },
    )

    result = process_asl_frames([np.zeros((2, 2, 3), dtype=np.uint8)] * 8)

    assert result["asl"]["confidence_threshold"] == 0.70
    assert result["asl"]["top_predictions"] == [{"label": "talk", "confidence": 0.96}]
    assert result["intent_input"]["detected_glosses"] == ["talk"]
    assert result["intent_input"]["sign_detection"]["top_prediction"] == "talk"
    assert result["intent_input"]["candidate_gloss_sequence"][0]["gloss"] == "talk"


def test_predict_asl_sequence_auto_falls_back_to_tflite(monkeypatch):
    class FakeWLASLDetector:
        def predict_sequence_from_frames(self, frames):
            return {
                "status": "wlasl_i3d_error",
                "error": "missing torch",
                "gloss_sequence": [],
            }

    class FakeASLDetector:
        def predict_sequence_from_frames(self, frames):
            return {
                "status": "ok",
                "gloss_sequence": ["hello"],
                "top_prediction": "hello",
                "confidence": 0.91,
                "confidence_threshold": 0.70,
                "top_predictions": [{"label": "hello", "confidence": 0.91}],
                "segment_predictions": [],
                "frames_used": len(frames),
                "windows_used": 1,
                "sequence_window": 30,
                "sequence_stride": 15,
                "recognition_mode": "sliding_window_sequence",
                "model_backend": "tflite_250",
            }

    monkeypatch.setenv("ASL_DETECTOR_BACKEND", "auto")
    monkeypatch.setattr(asl_pipeline, "WLASLI3DDetector", FakeWLASLDetector)
    monkeypatch.setattr(asl_pipeline, "ASLDetector", FakeASLDetector)

    result = asl_pipeline.predict_asl_sequence([np.zeros((2, 2, 3), dtype=np.uint8)] * 30)

    assert result["gloss_sequence"] == ["hello"]
    assert result["fallback_from"]["backend"] == "wlasl_i3d"
    assert result["fallback_from"]["error"] == "missing torch"


def test_predict_asl_sequence_defaults_to_auto(monkeypatch):
    class FakeWLASLDetector:
        def predict_sequence_from_frames(self, frames):
            return {
                "status": "ok",
                "gloss_sequence": ["thankyou"],
                "top_prediction": "thankyou",
                "confidence": 0.44,
                "confidence_threshold": 0.20,
                "top_predictions": [{"label": "thankyou", "confidence": 0.44}],
                "segment_predictions": [],
                "frames_used": len(frames),
                "windows_used": 1,
                "sequence_window": 64,
                "sequence_stride": 32,
                "recognition_mode": "wlasl_i3d_sliding_window",
                "model_backend": "wlasl_i3d_2000",
            }

    monkeypatch.delenv("ASL_DETECTOR_BACKEND", raising=False)
    monkeypatch.setattr(asl_pipeline, "WLASLI3DDetector", FakeWLASLDetector)

    result = asl_pipeline.predict_asl_sequence([np.zeros((2, 2, 3), dtype=np.uint8)] * 64)

    assert result["gloss_sequence"] == ["thankyou"]
    assert result["model_backend"] == "wlasl_i3d_2000"


def test_summarize_asl_result_is_stable_for_missing_fields():
    summary = summarize_asl_result(
        {
            "asl": {"status": "model_missing"},
            "emotion": {"dominant_emotion": "unknown", "intensity": 0.0},
        }
    )

    assert "ASL status: model_missing" in summary
    assert "Emotion: unknown (0.00)" in summary


def test_resolve_video_path_accepts_gradio_dict_payload(tmp_path):
    video_path = tmp_path / "capture.mp4"
    video_path.write_bytes(b"demo")

    resolved = resolve_video_path({"path": str(video_path)})

    assert resolved == video_path


def test_resolve_video_path_accepts_gradio_tuple_payload(tmp_path):
    video_path = tmp_path / "capture.mp4"
    video_path.write_bytes(b"demo")

    resolved = resolve_video_path((str(video_path),))

    assert resolved == video_path


def test_parse_gloss_override_normalizes_words():
    assert parse_gloss_override("i love,you") == ["I", "LOVE", "YOU"]


def test_apply_gloss_override_marks_diagnostics():
    result = {
        "asl": {"status": "model_missing", "gloss_sequence": []},
        "emotion": {"status": "emotion_error"},
        "intent_input": {"detected_glosses": [], "diagnostics": {}},
    }

    updated = apply_gloss_override(result, "I LOVE YOU")

    assert updated["intent_input"]["detected_glosses"] == ["I", "LOVE", "YOU"]
    assert updated["intent_input"]["diagnostics"]["manual_gloss_override"] is True
    assert updated["asl"]["top_prediction"] == "I LOVE YOU"