#!/usr/bin/env python3

import sys
import struct

with open("out.mod", "wb") as fo:

	# Module name.
	fo.write(struct.pack("20s", "TEMP".encode('utf-8')))

	for i in range(1,32):
		# Sample name.
		fo.write(struct.pack("22s", "SMPL".encode('utf-8')))

		fo.write(struct.pack(">H", 0))		# Sample length.
		fo.write(struct.pack(">B", 0))		# Finetune.
		fo.write(struct.pack(">B", 64))		# Volume.
		fo.write(struct.pack(">H", 0))		# Loop offset.
		fo.write(struct.pack(">H", 0))		# Loop length.

	fo.write(struct.pack(">B", 1))		# Song positions.
	fo.write(struct.pack(">B", 42)) 	# Obsolete.

	# Pattern table.
	for i in range(0, 128):
		fo.write(bytes(b"\x00"))

	# 31 samples mode.
	fo.write(struct.pack("4s", "M.K.".encode("ascii")))

	# Pattern data.
	for i in range(0, 1):
		for r in range(0,64):
			for c in range(0, 4):
				etype = 1
				evall = 32
				evalh = evall >> 4

				period = 202
				effect = (evall & 0xF) | ((evalh & 0xF) * 16) | ((etype & 0xF) * 256)
				sample = 1

				div0 = (period & 0xFFF) | ((sample & 0xF0) * 256)
				div1 = (effect & 0xFFF) | ((sample & 0xF) * 4096)
				fo.write(struct.pack(">H", div0))
				fo.write(struct.pack(">H", div1))