#!/usr/bin/env python
# -*- coding: utf-8 -*-

#Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)

#This library is free software; you can redistribute it and/or
#modify it under the terms of the GNU Library General Public
#License as published by the Free Software Foundation; either
#version 2 of the License, or (at your option) any later version.

#This library is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#Library General Public License for more details.

#You should have received a copy of the GNU Library General Public License
#along with this library; see the file COPYING.LIB.  If not, write to
#the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
#Boston, MA 02110-1301, USA.

from __future__ import with_statement

import sys
import os
import os.path
import re
import logging
from subprocess import Popen, PIPE, STDOUT
from optparse import OptionParser


class Log(object):
    def __init__(self, name):
        self._log = logging.getLogger(name)
        self.debug = self._log.debug
        self.warn = self._log.warn
        self.error = self._log.error
        self.exception = self._log.exception
        self.info = self._log.info


class Options(Log):
    """ Option manager. It parses and checks script's parameters, sets an internal variable. """

    def __init__(self, args):
        Log.__init__(self, "Options")
        log = self._log
        opt = OptionParser("%prog [options] PathToSearch.\nTry -h or --help.")
        opt.add_option("-j", "--parallel-level", action="store", type="int",
              dest="parallel_level", default=None,
              help="Number of parallel processes executing the Qt's tests. Default: cpu count.")
        opt.add_option("-v", "--verbose", action="store", type="int",
              dest="verbose", default=2,
              help="Verbose level (0 - quiet, 1 - errors only, 2 - infos and warnings, 3 - debug information). Default: %default.")
        opt.add_option("", "--tests-options", action="store", type="string",
              dest="tests_options", default="",
              help="Parameters passed to Qt's tests (for example '-eventdelay 123').")
        opt.add_option("-o", "--output-file", action="store", type="string",
              dest="output_file", default="/tmp/qtwebkittests.html",
              help="File where results will be stored. The file will be overwritten. Default: %default.")
        opt.add_option("-b", "--browser", action="store", dest="browser",
              default="xdg-open",
              help="Browser in which results will be opened. Default %default.")
        opt.add_option("", "--do-not-open-results", action="store_false",
              dest="open_results", default=True,
              help="The results shouldn't pop-up in a browser automatically")
        opt.add_option("-d", "--developer-mode", action="store_true",
              dest="developer", default=False,
              help="Special mode for debugging. In general it simulates human behavior, running all autotests. In the mode everything is executed synchronously, no html output will be generated, no changes or transformation will be applied to stderr or stdout. In this mode options; parallel-level, output-file, browser and do-not-open-results will be ignored.")
        opt.add_option("-t", "--timeout", action="store", type="int",
              dest="timeout", default=0,
              help="Timeout in seconds for each testsuite. Zero value means that there is not timeout. Default: %default.")

        self._o, self._a = opt.parse_args(args)
        verbose = self._o.verbose
        if verbose == 0:
            logging.basicConfig(level=logging.CRITICAL,)
        elif verbose == 1:
            logging.basicConfig(level=logging.ERROR,)
        elif verbose == 2:
            logging.basicConfig(level=logging.INFO,)
        elif verbose == 3:
            logging.basicConfig(level=logging.DEBUG,)
        else:
            logging.basicConfig(level=logging.INFO,)
            log.warn("Bad verbose level, switching to default.")
        try:
            if not os.path.exists(self._a[0]):
                raise Exception("Given path doesn't exist.")
            if len(self._a) > 1:
                raise IndexError("Only one directory could be provided.")
            self._o.path = self._a[0]
        except IndexError:
            log.error("Bad usage. Please try -h or --help.")
            sys.exit(1)
        except Exception:
            log.error("Path '%s' doesn't exist", self._a[0])
            sys.exit(2)
        if self._o.developer:
            if not self._o.parallel_level is None:
                log.warn("Developer mode sets parallel-level option to one.")
            self._o.parallel_level = 1
            self._o.open_results = False

    def __getattr__(self, attr):
        """ Maps all options properties into this object (remove one level of indirection). """
        return getattr(self._o, attr)


def run_test(args):
    """ Runs one given test.
    args should contain a tuple with 3 elements;
      TestSuiteResult containing full file name of an autotest executable.
      str with options that should be passed to the autotest executable
      bool if true then the stdout will be buffered and separated from the stderr, if it is false
        then the stdout and the stderr will be merged together and left unbuffered (the TestSuiteResult output will be None).
      int time after which the autotest executable would be killed
    """
    log = logging.getLogger("Exec")
    test_suite, options, buffered, timeout = args
    timer = None
    try:
        log.info("Running... %s", test_suite.test_file_name())
        if buffered:
            tst = Popen([test_suite.test_file_name()] + options.split(), stdout=PIPE, stderr=None)
        else:
            tst = Popen([test_suite.test_file_name()] + options.split(), stdout=None, stderr=STDOUT)
        if timeout:
            from threading import Timer
            log.debug("Setting timeout timer %i sec on %s (process %s)", timeout, test_suite.test_file_name(), tst.pid)
            def process_killer():
                try:
                    try:
                        tst.terminate()
                    except AttributeError:
                        # Workaround for python version < 2.6 it can be removed as soon as we drop support for python2.5
                        try:
                            import ctypes
                            PROCESS_TERMINATE = 1
                            handle = ctypes.windll.kernel32.OpenProcess(PROCESS_TERMINATE, False, tst.pid)
                            ctypes.windll.kernel32.TerminateProcess(handle, -1)
                            ctypes.windll.kernel32.CloseHandle(handle)
                        except AttributeError:
                            # windll is not accessible so we are on *nix like system
                            import signal
                            os.kill(tst.pid, signal.SIGTERM)
                    log.error("Timeout, process '%s' (%i) was terminated", test_suite.test_file_name(), tst.pid)
                except OSError, e:
                    # the process was finished before got killed
                    pass
            timer = Timer(timeout, process_killer)
            timer.start()
    except OSError, e:
        log.exception("Can't open an autotest file: '%s'. Skipping the test...", e.filename)
    else:
        test_suite.set_output(tst.communicate()[0])  # takes stdout only, in developer mode it would be None.
    log.info("Finished %s", test_suite.test_file_name())
    return test_suite


class TestSuiteResult(object):
    """ Keeps information about a test. """

    def __init__(self):
        self._output = None
        self._test_file_name = None

    def set_output(self, xml):
        if xml:
            self._output = xml.strip()

    def output(self):
        return self._output

    def set_test_file_name(self, file_name):
        self._test_file_name = file_name

    def test_file_name(self):
        return self._test_file_name


class Main(Log):
    """ The main script. All real work is done in run() method. """

    def __init__(self, options):
        Log.__init__(self, "Main")
        self._options = options
        if options.parallel_level > 1 or options.parallel_level is None:
            try:
                from multiprocessing import Pool
            except ImportError:
                self.warn("Import Error: the multiprocessing module couldn't be loaded (may be lack of python-multiprocessing package?). The Qt autotests will be executed one by one.")
                options.parallel_level = 1
        if options.parallel_level == 1:

            class Pool(object):
                """ A hack, created to avoid problems with multiprocessing module, this class is single thread replacement for the multiprocessing.Pool class. """
                def __init__(self, processes):
                    pass

                def imap_unordered(self, func, files):
                    return map(func, files)

                def map(self, func, files):
                    return map(func, files)

        self._Pool = Pool

    def run(self):
        """ We need to set this system variable in order to load the proper plugin for the qml tests """
        os.putenv("QML_IMPORT_PATH", self._options.path + "../../../imports")
        """ Find && execute && publish results of all test. "All in one" function. """
        self.debug("Searching executables...")
        tests_executables = self.find_tests_paths(self._options.path)
        self.debug("Found: %s", len(tests_executables))
        self.debug("Executing tests...")
        results = self.run_tests(tests_executables)
        if not self._options.developer:
            self.debug("Transforming...")
            transformed_results = self.transform(results)
            self.debug("Publishing...")
            self.announce_results(transformed_results)

    def find_tests_paths(self, path):
        """ Finds all tests executables inside the given path. """
        executables = []
        for root, dirs, files in os.walk(path):
            # Check only for a file that name starts from 'tst_' and that we can execute.
            filtered_path = filter(lambda w: w.startswith('tst_') and os.access(os.path.join(root, w), os.X_OK), files)
            filtered_path = map(lambda w: os.path.join(root, w), filtered_path)
            for file_name in filtered_path:
                r = TestSuiteResult()
                r.set_test_file_name(file_name)
                executables.append(r)
        return executables

    def run_tests(self, files):
        """ Executes given files by using a pool of workers. """
        workers = self._Pool(processes=self._options.parallel_level)
        # to each file add options.
        self.debug("Using %s the workers pool, number of workers %i", repr(workers), self._options.parallel_level)
        package = map(lambda w: [w, self._options.tests_options, not self._options.developer, self._options.timeout], files)
        self.debug("Generated packages for workers: %s", repr(package))
        results = workers.map(run_test, package)  # Collects results.
        return results

    def transform(self, results):
        """ Transforms list of the results to specialized versions. """
        stdout = self.convert_to_stdout(results)
        html = self.convert_to_html(results)
        return {"stdout": stdout, "html": html}

    def announce_results(self, results):
        """ Shows the results. """
        self.announce_results_stdout(results['stdout'])
        self.announce_results_html(results['html'])

    def announce_results_stdout(self, results):
        """ Show the results by printing to the stdout."""
        print(results)

    def announce_results_html(self, results):
        """ Shows the result by creating a html file and calling a web browser to render it. """
        with file(self._options.output_file, 'w') as f:
            f.write(results)
        if self._options.open_results:
            Popen(self._options.browser + " " + self._options.output_file, stdout=None, stderr=None, shell=True)

    def convert_to_stdout(self, results):
        """ Converts results, that they could be nicely presented in the stdout. """
        # Join all results into one piece.
        txt = "\n\n".join(map(lambda w: w.output(), results))
        # Find total count of failed, skipped and passed tests.
        totals = re.findall(r"([0-9]+) passed, ([0-9]+) failed, ([0-9]+) skipped", txt)
        totals = reduce(lambda x, y: (int(x[0]) + int(y[0]), int(x[1]) + int(y[1]), int(x[2]) + int(y[2])), totals)
        totals = map(str, totals)
        totals = totals[0] + " passed, " + totals[1] + " failed, " + totals[2] + " skipped"
        # Add a summary.
        txt += '\n\n\n' + '*' * 70
        txt += "\n**" + ("TOTALS: " + totals).center(66) + '**'
        txt += '\n' + '*' * 70 + '\n'
        return txt

    def convert_to_html(self, results):
        """ Converts results, that they could showed as a html page. """
        # Join results into one piece.
        txt = "\n\n".join(map(lambda w: w.output(), results))
        txt = txt.replace('&', '&amp;').replace('<', "&lt;").replace('>', "&gt;")
        # Add a color and a style.
        txt = re.sub(r"([* ]+(Finished)[ a-z_A-Z0-9]+[*]+)",
            lambda w: r"",
            txt)
        txt = re.sub(r"([*]+[ a-z_A-Z0-9]+[*]+)",
            lambda w: "<case class='good'><br><br><b>" + w.group(0) + r"</b></case>",
            txt)
        txt = re.sub(r"(Config: Using QTest library)((.)+)",
            lambda w: "\n<case class='good'><br><i>" + w.group(0) + r"</i>  ",
            txt)
        txt = re.sub(r"\n(PASS)((.)+)",
            lambda w: "</case>\n<case class='good'><br><status class='pass'>" + w.group(1) + r"</status>" + w.group(2),
            txt)
        txt = re.sub(r"\n(FAIL!)((.)+)",
            lambda w: "</case>\n<case class='bad'><br><status class='fail'>" + w.group(1) + r"</status>" + w.group(2),
            txt)
        txt = re.sub(r"\n(XPASS)((.)+)",
            lambda w: "</case>\n<case class='bad'><br><status class='xpass'>" + w.group(1) + r"</status>" + w.group(2),
            txt)
        txt = re.sub(r"\n(XFAIL)((.)+)",
            lambda w: "</case>\n<case class='good'><br><status class='xfail'>" + w.group(1) + r"</status>" + w.group(2),
            txt)
        txt = re.sub(r"\n(SKIP)((.)+)",
            lambda w: "</case>\n<case class='good'><br><status class='xfail'>" + w.group(1) + r"</status>" + w.group(2),
            txt)
        txt = re.sub(r"\n(QWARN)((.)+)",
            lambda w: "</case>\n<case class='bad'><br><status class='warn'>" + w.group(1) + r"</status>" + w.group(2),
            txt)
        txt = re.sub(r"\n(RESULT)((.)+)",
            lambda w: "</case>\n<case class='good'><br><status class='benchmark'>" + w.group(1) + r"</status>" + w.group(2),
            txt)
        txt = re.sub(r"\n(QFATAL)((.)+)",
            lambda w: "</case>\n<case class='bad'><br><status class='crash'>" + w.group(1) + r"</status>" + w.group(2),
            txt)
        txt = re.sub(r"\n(Totals:)([0-9', a-z]*)",
            lambda w: "</case>\n<case class='good'><br><b>" + w.group(1) + r"</b>" + w.group(2) + "</case>",
            txt)
        # Find total count of failed, skipped and passed tests.
        totals = re.findall(r"([0-9]+) passed, ([0-9]+) failed, ([0-9]+) skipped", txt)
        totals = reduce(lambda x, y: (int(x[0]) + int(y[0]), int(x[1]) + int(y[1]), int(x[2]) + int(y[2])), totals)
        totals = map(str, totals)
        totals = totals[0] + " passed, " + totals[1] + " failed, " + totals[2] + " skipped."
        # Create a header of the html source.
        txt = """
        <html>
        <head>
          <script>
          function init() {
              // Try to find the right styleSheet (this document could be embedded in an other html doc)
              for (i = document.styleSheets.length - 1; i >= 0; --i) {
                  if (document.styleSheets[i].cssRules[0].selectorText == "case.good") {
                      resultStyleSheet = i;
                      return;
                  }
              }
              // The styleSheet hasn't been found, but it should be the last one.
              resultStyleSheet = document.styleSheets.length - 1;
          }

          function hide() {
              document.styleSheets[resultStyleSheet].cssRules[0].style.display='none';
          }

          function show() {
              document.styleSheets[resultStyleSheet].cssRules[0].style.display='';
          }

          </script>
          <style type="text/css">
            case.good {color:black}
            case.bad {color:black}
            status.pass {color:green}
            status.crash {color:red}
            status.fail {color:red}
            status.xpass {color:663300}
            status.xfail {color:004500}
            status.benchmark {color:000088}
            status.warn {color:orange}
            status.crash {color:red; text-decoration:blink; background-color:black}
          </style>
        </head>
        <body onload="init()">
        <center>
          <h1>Qt's autotests results</h1>%(totals)s<br>
          <hr>
          <form>
            <input type="button" value="Show failures only" onclick="hide()"/>
            &nbsp;
            <input type="button" value="Show all" onclick="show()"/>
          </form>
        </center>
        <hr>
        %(results)s
        </body>
        </html>""" % {"totals": totals, "results": txt}
        return txt


if __name__ == '__main__':
    options = Options(sys.argv[1:])
    main = Main(options)
    main.run()