"""
mbed SDK
Copyright (c) 2011-2013 ARM Limited

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""

import re
from host_test import DefaultTest
from time import time, strftime, gmtime
from sys import stdout

class RTCTest(DefaultTest):
    PATTERN_RTC_VALUE = "\[(\d+)\] \[(\d+-\d+-\d+ \d+:\d+:\d+ [AaPpMm]{2})\]"
    re_detect_rtc_value = re.compile(PATTERN_RTC_VALUE)

    def run(self):
        test_result = True
        start = time()
        sec_prev = 0
        for i in range(0, 5):
            # Timeout changed from default: we need to wait longer for some boards to start-up
            c = self.mbed.serial_readline(timeout=10)
            if c is None:
                self.print_result("ioerr_serial")
                return
            print c.strip()
            delta = time() - start
            m = self.re_detect_rtc_value.search(c)
            if m and len(m.groups()):
                sec = int(m.groups()[0])
                time_str = m.groups()[1]
                correct_time_str = strftime("%Y-%m-%d %H:%M:%S %p", gmtime(float(sec)))
                test_result = test_result and (time_str == correct_time_str)
                result_msg = "OK" if (time_str == correct_time_str and sec > 0 and sec > sec_prev) else "FAIL"
                print "HOST: [%s] [%s] received time %+d sec after %.2f sec... %s"% (sec, time_str, sec - sec_prev, delta, result_msg)
                sec_prev = sec
            else:
                test_result = False
                break
            start = time()
            stdout.flush()
        if test_result: # All numbers are the same
            self.print_result('success')
        else:
            self.print_result('failure')

if __name__ == '__main__':
    RTCTest().run()