# Copyright (c) 2009 Google Inc. All rights reserved.
# Copyright (c) 2009 Apple Inc. All rights reserved.
# Copyright (c) 2012 Intel Corporation. All rights reserved.
#
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# modification, are permitted provided that the following conditions are
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#     * Redistributions of source code must retain the above copyright
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import fnmatch
import re

from optparse import make_option

from webkitpy.common.system.crash_logs import CrashLogs
from webkitpy.tool.commands.command import Command
from webkitpy.layout_tests.models.test_expectations import TestExpectations
from webkitpy.layout_tests.port.factory import platform_options


class CrashLog(Command):
    name = 'crash-log'
    help_text = 'Print the newest crash log for the given process'
    show_in_main_help = True
    long_help = """Finds the newest crash log matching the given process name
and PID and prints it to stdout."""
    argument_names = 'PROCESS_NAME [PID]'

    def execute(self, options, args, tool):
        crash_logs = CrashLogs(tool)
        pid = None
        if len(args) > 1:
            pid = int(args[1])
        print crash_logs.find_newest_log(args[0], pid)


class PrintExpectations(Command):
    name = 'print-expectations'
    help_text = 'Print the expected result for the given test(s) on the given port(s)'
    show_in_main_help = True

    def __init__(self):
        options = [
            make_option('--all', action='store_true', default=False,
                        help='display the expectations for *all* tests'),
            make_option('-x', '--exclude-keyword', action='append', default=[],
                        help='limit to tests not matching the given keyword (for example, '
                             '"skip", "slow", or "crash". May specify multiple times'),
            make_option('-i', '--include-keyword', action='append', default=[],
                        help='limit to tests with the given keyword (for example, "skip", '
                             '"slow", or "crash". May specify multiple times'),
            make_option('--csv', action='store_true', default=False,
                        help='Print a CSV-style report that includes the port name, bugs, '
                             'specifiers, tests, and expectations'),
            make_option('-f', '--full', action='store_true', default=False,
                        help='Print a full TestExpectations-style line for every match'),
            make_option('--paths', action='store_true', default=False,
                        help='display the paths for all applicable expectation files'),
        ] + platform_options(use_globs=True)

        super(PrintExpectations, self).__init__(options=options)
        self._expectation_models = {}

    def execute(self, options, args, tool):
        if not options.paths and not args and not options.all:
            print 'You must either specify one or more test paths or --all.'
            return

        if options.platform:
            port_names = fnmatch.filter(tool.port_factory.all_port_names(), options.platform)
            if not port_names:
                default_port = tool.port_factory.get(options.platform)
                if default_port:
                    port_names = [default_port.name()]
                else:
                    print "No port names match '%s'" % options.platform
                    return
            else:
                default_port = tool.port_factory.get(port_names[0])
        else:
            default_port = tool.port_factory.get(options=options)
            port_names = [default_port.name()]

        if options.paths:
            files = default_port.expectations_files()
            layout_tests_dir = default_port.layout_tests_dir()
            for file in files:
                if file.startswith(layout_tests_dir):
                    file = file.replace(layout_tests_dir, 'LayoutTests')
                print file
            return

        tests = set(default_port.tests(args))
        for port_name in port_names:
            port = tool.port_factory.get(port_name, options)
            model = TestExpectations(port, tests).model()
            tests_to_print = self._filter_tests(options, model, tests)
            lines = [model.get_expectation_line(test) for test in sorted(tests_to_print)]
            if port_name != port_names[0]:
                print
            print '\n'.join(self._format_lines(options, port_name, lines))

    def _filter_tests(self, options, model, tests):
        filtered_tests = set()
        if options.include_keyword:
            for keyword in options.include_keyword:
                filtered_tests.update(model.get_test_set_for_keyword(keyword))
        else:
            filtered_tests = tests

        for keyword in options.exclude_keyword:
            filtered_tests.difference_update(model.get_test_set_for_keyword(keyword))
        return filtered_tests

    def _format_lines(self, options, port_name, lines):
        output = []
        if options.csv:
            for line in lines:
                output.append('%s,%s' % (port_name, line.to_csv()))
        elif lines:
            include_modifiers = options.full
            include_expectations = options.full or len(options.include_keyword) != 1 or len(options.exclude_keyword)
            output.append('// For %s' % port_name)
            for line in lines:
                output.append('%s' % line.to_string(None, include_modifiers, include_expectations, include_comment=False))
        return output


class PrintBaselines(Command):
    name = 'print-baselines'
    help_text = 'Prints the baseline locations for given test(s) on the given port(s)'
    show_in_main_help = True

    def __init__(self):
        options = [
            make_option('--all', action='store_true', default=False,
                        help='display the baselines for *all* tests'),
            make_option('--csv', action='store_true', default=False,
                        help='Print a CSV-style report that includes the port name, test_name, '
                             'test platform, baseline type, baseline location, and baseline platform'),
            make_option('--include-virtual-tests', action='store_true',
                        help='Include virtual tests'),
        ] + platform_options(use_globs=True)
        super(PrintBaselines, self).__init__(options=options)
        self._platform_regexp = re.compile(r'platform/([^\/]+)/(.+)')

    def execute(self, options, args, tool):
        if not args and not options.all:
            print 'You must either specify one or more test paths or --all.'
            return

        default_port = tool.port_factory.get()
        if options.platform:
            port_names = fnmatch.filter(tool.port_factory.all_port_names(), options.platform)
            if not port_names:
                print "No port names match '%s'" % options.platform
        else:
            port_names = [default_port.name()]

        if options.include_virtual_tests:
            tests = sorted(default_port.tests(args))
        else:
            tests = sorted(default_port.real_tests(args))

        for port_name in port_names:
            if port_name != port_names[0]:
                print
            if not options.csv:
                print '// For %s' % port_name
            port = tool.port_factory.get(port_name)
            for test_name in tests:
                self._print_baselines(options, port_name, test_name, port.expected_baselines_by_extension(test_name))

    def _print_baselines(self, options, port_name, test_name, baselines):
        for extension in sorted(baselines.keys()):
            baseline_location = baselines[extension]
            if baseline_location:
                if options.csv:
                    print '%s,%s,%s,%s,%s,%s' % (port_name, test_name, self._platform_for_path(test_name),
                                                 extension[1:], baseline_location, self._platform_for_path(baseline_location))
                else:
                    print baseline_location

    def _platform_for_path(self, relpath):
        platform_matchobj = self._platform_regexp.match(relpath)
        if platform_matchobj:
            return platform_matchobj.group(1)
        return None