"""Generate original mono PCM effects using only the Python standard library.
Python is a development convenience; it is never needed to play the game.
"""
from pathlib import Path
import math
import struct
import wave

ROOT = Path(__file__).resolve().parents[1] / "assets" / "audio"
CUES = {
    "pellet": ([880, 1320], 0.035),
    "power": ([330, 440, 660, 880], 0.09),
    "frightened": ([165, 220, 165], 0.10),
    "defeated": ([660, 880, 1320], 0.07),
    "death": ([660, 550, 440, 330, 165], 0.12),
    "victory": ([440, 554.37, 659.25, 880, 659.25, 880], 0.16),
    "game_over": ([330, 293.66, 261.63, 164.81], 0.22),
}

def main():
    ROOT.mkdir(parents=True, exist_ok=True)
    rate = 22050
    for name, (notes, duration) in CUES.items():
        samples = bytearray()
        for frequency in notes:
            count = int(rate * duration)
            for i in range(count):
                envelope = min(i / (rate * 0.005), 1) * (1 - i / count) ** 1.5
                tone = math.sin(2 * math.pi * frequency * i / rate)
                samples.extend(struct.pack("<h", int(tone * envelope * 6500)))
        with wave.open(str(ROOT / f"{name}.wav"), "wb") as output:
            output.setnchannels(1)
            output.setsampwidth(2)
            output.setframerate(rate)
            output.writeframes(samples)

if __name__ == "__main__":
    main()