import urllib
import urllib2
import threading
import subprocess
import os
import sys
import json

def local_print(string):
    if os.name == "posix":
        # Nicer colour output when using posix (and thus supporting colour)
        string = "\033[92m%s\033[0m" % string
    print(string)

def remote_print(string):
    if os.name == "posix":
        # Nicer colour output when using posix (and thus supporting colour)
        string = "\033[94m%s\033[0m" % string
    print(string)

local_print("Welcome to the debugging shell!")
try:
    address = sys.argv[1]
except IndexError:
    address = "http://127.0.0.1:8001"
try:
    taskname = sys.argv[2]
except IndexError:
    import random
    taskname = str(random.random())

local_print("Switching context to Modelverse: all data is piped.")
local_print("Available commands: 'attach_debugger', 'detach_debugger', 'pause', 'resume', 'line_step', 'big_step', 'small_step', 'step_into', 'read_symbols', 'add_breakpoint', 'del_breakpoint', 'toggle_breakpoint'")
local_print("To quit: execute command 'quit'")

def polling_func():
    while 1:
        try:
            replies = json.loads(urllib2.urlopen(urllib2.Request(address, urllib.urlencode({"op": "poll_messages", "taskname": taskname})), timeout=60).read())
        except:
            continue
        for reply in replies:
            print "RES: %s" % reply['result']
            if 'state' in reply:
                print "STATE: %s" % reply['state']
            if 'stack' in reply:
                print "STACK:\n\t%s" % '\n\t'.join(['{} {: >50.50} .{}'.format(l[::-1], lnr[::-1], str(k)[::-1])[::-1] for (k, (lnr, l)) in list(enumerate(reply['stack']))])
            if 'instruction' in reply:
                print "INST: %s" % reply['instruction']
            if 'phase' in reply:
                print "PHASE: %s" % reply['phase']
            if 'symbols' in reply:
                print "SYMB: %s" % reply['symbols']
            if 'triggered_bp' in reply:
                print "BP: %s" % reply['triggered_bp']

thrd = threading.Thread(target=polling_func)
thrd.daemon = True
thrd.start()
            
while 1:
    inp = raw_input().split(" ")
    action = inp[0]
    params = {}
    if action == "quit":
        local_print("Received quit: breaking connection to Modelverse immediately!")
        break
    elif action not in set(["attach_debugger", "detach_debugger", "pause", "resume", "line_step", "big_step", "small_step", "step_into", "read_symbols", "add_breakpoint", "del_breakpoint", "toggle_breakpoint"]):
        local_print("Invalid action %s" % action)
        continue
        
    if action == "add_breakpoint":
        if len(inp) < 2:
            print 'add_breakpoint requires at least 1 parameter!'
            continue
        inp += [None, None, True, True][(len(inp) - 2):]
        params['breakpoint_id'] = inp[1]
        params['file_name'] = inp[2] if inp[2] != "." else None
        params['line_number'] = int(inp[3]) if inp[3] else None
        params['enabled'] = bool(inp[4])
        params['disable_on_trigger'] = bool(inp[1])
    elif action == "del_breakpoint":
        if len(inp) < 2:
            print 'del_breakpoint requires 1 parameter!'
            continue
        params['breakpoint_id'] = inp[1]
    elif action == "toggle_breakpoint":
        if len(inp) < 3:
            print 'del_breakpoint requires 2 parameters!'
            continue
        params['breakpoint_id'] = inp[1]
        params['enabled'] = bool(inp[2])
    
    urllib2.urlopen(urllib2.Request(address, urllib.urlencode({"op": action, "taskname": taskname, "args": json.dumps(params)}))).read()