import struct

OPCODES = {
	
	'create': 0,
	'wire': 1,
	'air': 2,
	'endtick': 3,
	'relay': 4,
	'setpos': 5,
	'setbasefreq': 6,
	'setgain': 7,
	'setphase': 8,
	'sine': 9,	
	'triangle': 10,	
	'square': 11,	
	'sawtooth': 12,	
	'setskew': 13,
	'skewsine': 14,	
	'slidebasefreq': 15,
	'slidegain': 16,
	'slidephase': 17,
	'slideskew': 18,
	'slidepos': 19,
	'pulse': 20,
	}
	
class Activity:

	def __repr__(self):
		
		return f'{self.name.rjust(20)} | {OPCODES[self.name]} {self.tick_start} {self.tick_end} {self.src_node.order if self.src_node else 0} {self.trg_node.order if self.trg_node else 0} '+' '.join(str(op) for op in self.operands)
	
	def __init__(self, sonnum, name, tick_start, tick_end, src_node, trg_node, operands):
		
		self.sonnum = sonnum
		
		self.name = name
		self.tick_start = tick_start
		self.tick_end = tick_end
		self.src_node = src_node
		self.trg_node = trg_node
		self.operands = operands
	
	def to_bytes(self):
		
		if self.name in OPCODES:
			
			b_opcode = OPCODES[self.name].to_bytes(2, byteorder="big")
			b_tick_start = int(self.tick_start).to_bytes(4, byteorder="big")
			b_tick_end = int(self.tick_end).to_bytes(4, byteorder="big")
			
			if not self.src_node:
				b_src_node = b'\x00' * 2
			else:
				b_src_node = self.src_node.order.to_bytes(2, byteorder="big")
			
			if not self.trg_node:
				b_trg_node = b'\x00' * 2
			else:
				b_trg_node = self.trg_node.order.to_bytes(2, byteorder="big")
				
			b_operands = [struct.pack('>d', 0.0)] * 6
			
			for i in range(0, 6):
				if len(self.operands) > i: b_operands[i] = struct.pack('>d', self.operands[i])
			
			return b_opcode + b_tick_start + b_tick_end + b_src_node + b_trg_node + b''.join(b_operands)
				
		else:	
			return b''