from pathlib import Path
import sys

import numpy as np


INSTRUMENT = Path(__file__).resolve().parent.parent / "alto-sax-model-04"
sys.path.insert(0, str(INSTRUMENT))

from horn import SAMPLE_RATE, render_sequence


VENT_RADIUS = 0.00125
TONGUE_STRENGTH = 0.25


def performance_events(notes, slurs, duration):
    slur_interiors = {round(onset, 6) for gesture in slurs for onset in gesture["onsets"][1:]}
    events = []
    for index, note in enumerate(notes):
        pitch = note["pitch"] + 9
        pressure = 5000.0 if pitch <= 73 else 5500.0 if pitch <= 75 else 6500.0
        gap = 0.00075 if pitch <= 73 else 0.0006 if pitch <= 75 else 0.0005 if pitch == 76 else 0.00045
        touch = (note["velocity"] / 0.65)**0.2
        end = min(duration, note["time"] + note["duration"] + 0.018)
        if index + 1 < len(notes):
            following = notes[index + 1]
            end = following["time"] if round(following["time"], 6) in slur_interiors else min(end, following["time"])
        events.append({"time": note["time"], "duration": round(end - note["time"], 9),
                       "writtenMidi": pitch, "pressurePa": pressure * touch, "gapM": gap * touch,
                       "tongued": round(note["time"], 6) not in slur_interiors})
    return events


def render_performance(notes, duration, slurs):
    events = performance_events(notes, slurs, duration)
    audio, details = render_sequence(events, duration, vent_radius=VENT_RADIUS,
                                     tongue_strength=TONGUE_STRENGTH)
    details.update({
        "continuousReedAndBore": True,
        "slurredOnsets": sum(not event["tongued"] for event in events),
        "fingeringChanges": int(np.count_nonzero(np.diff([event["writtenMidi"] for event in events]))),
        "playerControls": events,
        "touchModel": "Scored velocity weakly adjusts breath pressure and resting gap together; model-04 source unchanged.",
        "playingTongueStrength": TONGUE_STRENGTH,
        "instrumentPreset": "1.25 mm register vents for fast transitions, versus 0.65 mm in the untouched standalone lab; other instrument coefficients unchanged.",
        "noteRelease": "Same 18 ms note-end extension and slur connections as the earlier physical-alto arrangement.",
    })
    return audio, details