#!/usr/bin/python
'''
Python implementation of an assimilator
Contributed by Stephen Pellicer
'''

import os, re, boinc_path_config, signal, sys, time
from Boinc import database, boinc_db, configxml, sched_messages

STOP_TRIGGER_FILENAME = os.path.join('..', 'stop_servers')
caught_sig_int = False
log_messages=sched_messages.SchedMessages()

def check_stop_trigger():
    global caught_sig_int, log_messages
    try:
        junk = open(STOP_TRIGGER_FILENAME, 'r')
    except IOError:
        if caught_sig_int:
            log_messages.printf(sched_messages.CRITICAL, "Caught SIGINT\n")
            sys.exit(1)
    else:
        log_messages.printf(sched_messages.CRITICAL, "Found stop trigger\n")
        sys.exit(1)

def sigint_handler(sig, stack):
    global caught_sig_int
    log_messages.printf(sched_messages.DEBUG, "Handled SIGINT\n")
    caught_sig_int = True

def get_file_path(result):
    return os.path.join(config.upload_dir, re.search('<name>(.*)</name>', result.xml_doc_out).group(1))

def assimilate_handler(wu, results, canonical_result):
    # check for valid wu.canonical_resultid
    if wu.canonical_result:
        # do application specific processing
        log_messages.printf(sched_messages.NORMAL, "[%s] Found canonical result\n", wu.name)
        question = open(os.path.join('..', 'question'), 'r').read()[:32]
        log_messages.printf(sched_messages.DEBUG, "Comparing to %s\n", question)
        if len(question) != 32:
            log_messages.printf(sched_messages.CRITICAL, "Question %s is wrong length\n", question)
        else:
            result = get_file_path(canonical_result)
            for line in open(result, 'r').readlines():
                line = line.strip()
                log_messages.printf(sched_messages.DEBUG, "  [%s] Answer found %s %s\n", canonical_result.name, line[-32:], line[:-33])
                if line[-32:] == question:
                    log_messages.printf(sched_messages.CRITICAL, "[RESULT#%d %s] Found Answer %s\n", canonical_result.id, canonical_result.name, line[:-33])
    else:
        log_messages.printf(sched_messages.NORMAL, "[%s] No canonical result\n", wu.name)
            
    if wu.error_mask&boinc_db.WU_ERROR_COULDNT_SEND_RESULT:
        log_messages.printf(sched_messages.CRITICAL, "[%s] Error: couldn't send a result\n", wu.name)
    if wu.error_mask&boinc_db.WU_ERROR_TOO_MANY_ERROR_RESULTS:
        log_messages.printf(sched_messages.CRITICAL, "[%s] Error: too many error results\n", wu.name)
    if wu.error_mask&boinc_db.WU_ERROR_TOO_MANY_TOTAL_RESULTS:
        log_messages.printf(sched_messages.CRITICAL, "[%s] Error: too many total results\n", wu.name)
    if wu.error_mask&boinc_db.WU_ERROR_TOO_MANY_SUCCESS_RESULTS:
        log_messages.printf(sched_messages.CRITICAL, "[%s] Error: too many success results\n", wu.name)
    # check for error conditions

def do_pass(app):
    did_something=False
    # check for stop trigger
    check_stop_trigger()

    # look for workunits with correct appid and assimilate_state==ASSIMILATE_READY
    for wu in database.Workunits.find(app=app, assimilate_state=boinc_db.ASSIMILATE_READY):
        did_something=True
        canonical_result=None
        results=None
        log_messages.printf(sched_messages.DEBUG, "[%s] assimilating: state=%d\n", wu.name, wu.assimilate_state)
        results = database.Results.find(workunit=wu)
        # look for canonical result for workunit in results
        for result in results:
            if result == wu.canonical_result:
                canonical_result=result

        # assimilate handler
        assimilate_handler(wu, results, canonical_result)

        # tag wu as ASSIMILATE_DONE
        wu.assimilate_state = boinc_db.ASSIMILATE_DONE
        wu.transition_time = int(time.time())
        wu.commit()

        # set wu transition_time

    # return did something result
    return did_something

# main function
asynch = False
one_pass = False
appname = ''

# check for asynch one_pass, debug, app
args = sys.argv[1:]
args.reverse()
while(len(args)):
    arg = args.pop()
    if arg == '-asynch':
        asynch = True
    elif arg == '-one_pass':
        one_pass = True
    elif arg == '-d':
        arg = args.pop()
        log_messages.set_debug_level(arg)
    elif arg == '-app':
        arg = args.pop()
        appname = arg
    else:
        log_messages.printf(sched_messages.CRITICAL, "Unrecognized arg: %s\n", arg)
        
config = configxml.default_config().config
database.connect()

# fork if asynch
if(asynch):
    # add fork code
    pass

# retrieve app where name = app.name
app=database.Apps.find1(name=appname)
signal.signal(signal.SIGINT, sigint_handler)

# do one pass or execute main loop
if one_pass:
    do_pass(app)
else:
    # main loop
    while(1):
        if not do_pass(app):
            time.sleep(10)