#!/usr/bin/env python3
import sys
import os
p = os.path.join
pUp = os.path.dirname
s = False
if getattr(sys, 'frozen', False) and hasattr(sys, '_MEIPASS'):
	s = os.path.realpath(sys.executable)
else:
	s = os.path.realpath(__file__)
sp = pUp(s)

# script start
import toml
import subprocess

def addressStr(addr):
	return addr[0] + ":" + str(addr[1])

def addressSslStr(addr):
	return addr[0] + ":" + str(addr[1] + 1)

def perr(rtn,cmd = None,op = None):
	if rtn == 0: return
	if cmd == None: cmd = []
	exc = subprocess.CalledProcessError(rtn,cmd,op)
	raise exc

def pcallStr(*args,**kwargs):
	proc = subprocess.Popen(*args,**kwargs, stdout=subprocess.PIPE)
	response = proc.stdout.read().decode("utf-8").strip("\n")
	rtn = proc.wait()
	perr(rtn,args[0])
	return response

def main():
	print("* Parsing config ...")
	configFiles = ["watch.toml"]
	if len(sys.argv) > 1:
		configFiles = sys.argv[1:]
	
	length = len(configFiles)
	index = 0
	while index < length:
		configFiles[index] = p(sp,"config",configFiles[index])
		index += 1
	
	config = toml.load(configFiles)
	for key in config["args"]:
		os.environ["fstream_arg_" + key] = str(config["args"][key])
	if not "values" in config: config["values"] = {}
	if not "python" in config["values"]: config["values"]["python"] = sys.executable
	
	for decoder in config["decoder"]:
		for i in range(len(decoder)):
			for key in config["values"]:
				decoder[i] = decoder[i].replace("$val:" +key+ "$",str(config["values"][key]))
			
			for key in os.environ:
				decoder[i] = decoder[i].replace("$env:" +key+ "$",os.environ[key])
	
	aes = False
	if "aespass" in config:
		if not "bufsize" in config["args"]:
			print("aespass is set, but args.bufsize is not.")
			sys.exit(1)
		os.environ["fstream_aespass"] = config["aespass"]
		os.environ["fstream_aesbuffer"] = str(config["args"]["bufsize"] - 16)
		aes = True
	
	address = config["address"].rsplit(":",1)
	address[1] = int(address[1])
	
	cmds = []
	cmds.append([sys.executable,p(sp,"fstream.py"),addressStr(address),"watch"])
	if aes == True: cmds.append([sys.executable,p(sp,"util","fstream-util-aes_to_pipe.py")])
	for decoder in config["decoder"]: cmds.append(decoder)
	
	procs = []
	procs.append(subprocess.Popen(cmds[0],stdout=subprocess.PIPE))
	for i in range(1,len(cmds) - 1):
		procs.append(subprocess.Popen(cmds[i],stdin=procs[i - 1].stdout,stdout=subprocess.PIPE))
	procs.append(subprocess.Popen(cmds[-1],stdin=procs[-1].stdout))
	
	for proc in reversed(procs):
		proc.wait()
	
main()