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import logging
import optparse
import os
import platform
import re
import sys
from webkitpy.tool.steps.abstractstep import AbstractStep
from webkitpy.tool.steps.options import Options
from webkitpy.common.system.executive import ScriptError, Executive
from webkitpy.common.host import Host
from webkitpy.layout_tests.controllers.layout_test_finder import LayoutTestFinder

_log = logging.getLogger(__name__)

class RunTests(AbstractStep):
    # FIXME: This knowledge really belongs in the commit-queue.
    NON_INTERACTIVE_FAILURE_LIMIT_COUNT = 30

    @classmethod
    def options(cls):
        return AbstractStep.options() + [
            Options.build_style,
            Options.test,
            Options.iterate_on_new_tests,
            Options.non_interactive,
            Options.quiet,
        ]

    def run(self, state):
        if self._options.iterate_on_new_tests:
            _log.info("Running run-webkit-tests on new tests")
            self._run_webkit_tests(self._options.iterate_on_new_tests)

        if not self._options.test:
            return

        python_unittests_command = self._tool.deprecated_port().run_python_unittests_command()
        if python_unittests_command:
            _log.info("Running Python unit tests")
            if self._options.non_interactive:
                filesystem = self._tool.filesystem
                python_unittest_results_directory = self._tool.port_factory.get().python_unittest_results_directory()
                filesystem.maybe_make_directory(python_unittest_results_directory)

                python_unittests_command.append('--json')
                output = self._tool.executive.run_command(python_unittests_command, cwd=self._tool.scm().checkout_root, error_handler=Executive.ignore_error, return_stderr=False)
                filesystem.write_text_file(filesystem.join(python_unittest_results_directory, "results.json"), output)
            else:
                self._tool.executive.run_and_throw_if_fail(python_unittests_command, cwd=self._tool.scm().checkout_root)

        if not self._options.non_interactive:
            # FIXME: We should teach the commit-queue and the EWS how to run these tests.

            perl_unittests_command = self._tool.deprecated_port().run_perl_unittests_command()
            if perl_unittests_command:
                _log.info("Running Perl unit tests")
                self._tool.executive.run_and_throw_if_fail(perl_unittests_command, cwd=self._tool.scm().checkout_root)

            javascriptcore_tests_command = self._tool.deprecated_port().run_javascriptcore_tests_command()
            if javascriptcore_tests_command:
                _log.info("Running JavaScriptCore tests")
                self._tool.executive.run_and_throw_if_fail(javascriptcore_tests_command, quiet=True, cwd=self._tool.scm().checkout_root)

        bindings_tests_command = self._tool.deprecated_port().run_bindings_tests_command()
        if bindings_tests_command:
            _log.info("Running bindings generation tests")
            args = bindings_tests_command
            try:
                self._tool.executive.run_and_throw_if_fail(args, cwd=self._tool.scm().checkout_root)
            except ScriptError, e:
                _log.info("Error running run-bindings-tests: %s" % e.message_with_output())

        _log.info("Running run-webkit-tests")
        self._run_webkit_tests()

    def _new_or_modified_tests(self):
        touched_files = self._tool.scm().changed_files()
        touched_files.extend(self._tool.scm().untracked_files())
        if not touched_files:
            return None

        configuration = "Debug" if (self._options.build_style == "debug") else "Release"
        port = Host().port_factory.get(self._tool.deprecated_port().port_flag_name, optparse.Values({'configuration': configuration}))
        return LayoutTestFinder(port, optparse.Values({'skipped': 'always', 'skip_failing_tests': False, 'http': True})).find_touched_tests(touched_files)

    def _run_webkit_tests(self, iterate_on_new_tests=0):
        args = self._tool.deprecated_port().run_webkit_tests_command(build_style=self._options.build_style)
        if self._options.non_interactive:
            args.extend([
                "--no-new-test-results",
                "--no-show-results",
                "--exit-after-n-failures=%s" % self.NON_INTERACTIVE_FAILURE_LIMIT_COUNT,
            ])

            # old-run-webkit-tests does not support --skip-failing-tests
            # Using --quiet one Windows fails when we try to use /dev/null, disabling for now until we find a fix
            if sys.platform != "cygwin":
                args.append("--quiet")
                args.append("--skip-failing-tests")
            else:
                args.append("--no-build");

        if self._options.quiet:
            args.append("--quiet")

        if iterate_on_new_tests:
            new_tests = self._new_or_modified_tests()
            if not new_tests:
                _log.info("No new or modified tests")
                return
            _log.info("Touched tests are: " + str(new_tests))
            for test in new_tests:
                args.append(test)
            args.append("--iterations=%d" % iterate_on_new_tests)

        self._tool.executive.run_and_throw_if_fail(args, cwd=self._tool.scm().checkout_root)