from __future__ import absolute_import

# System modules
import argparse
import sys
import os
import textwrap

# LLDB modules
from . import configuration


def create_parser():
    parser = argparse.ArgumentParser(
        description='description',
        prefix_chars='+-',
        add_help=False)
    group = None

    # Helper function for boolean options (group will point to the current
    # group when executing X)
    X = lambda optstr, helpstr, **kwargs: group.add_argument(
        optstr, help=helpstr, action='store_true', **kwargs)

    group = parser.add_argument_group('Help')
    group.add_argument(
        '-h',
        '--help',
        dest='h',
        action='store_true',
        help="Print this help message and exit.  Add '-v' for more detailed help.")

    # C and Python toolchain options
    group = parser.add_argument_group('Toolchain options')
    group.add_argument(
        '-A',
        '--arch',
        metavar='arch',
        dest='arch',
        help=textwrap.dedent('''Specify the architecture(s) to test. This option can be specified more than once'''))
    group.add_argument('-C', '--compiler', metavar='compiler', dest='compiler', help=textwrap.dedent(
        '''Specify the compiler(s) used to build the inferior executables. The compiler path can be an executable basename or a full path to a compiler executable. This option can be specified multiple times.'''))
    if sys.platform == 'darwin':
        group.add_argument('--apple-sdk', metavar='apple_sdk', dest='apple_sdk', default="", help=textwrap.dedent(
            '''Specify the name of the Apple SDK (macosx, macosx.internal, iphoneos, iphoneos.internal, or path to SDK) and use the appropriate tools from that SDK's toolchain.'''))
    # FIXME? This won't work for different extra flags according to each arch.
    group.add_argument(
        '-E',
        metavar='extra-flags',
        help=textwrap.dedent('''Specify the extra flags to be passed to the toolchain when building the inferior programs to be debugged
                                                           suggestions: do not lump the "-A arch1 -A arch2" together such that the -E option applies to only one of the architectures'''))

    group.add_argument('--dsymutil', metavar='dsymutil', dest='dsymutil', help=textwrap.dedent('Specify which dsymutil to use.'))
    group.add_argument('--llvm-tools-dir', metavar='dir', dest='llvm_tools_dir',
            help=textwrap.dedent('The location of llvm tools used for testing (yaml2obj, FileCheck, etc.).'))

    # Test filtering options
    group = parser.add_argument_group('Test filtering options')
    group.add_argument(
        '-f',
        metavar='filterspec',
        action='append',
        help=('Specify a filter, which looks like "TestModule.TestClass.test_name".  '+
            'You may also use shortened filters, such as '+
            '"TestModule.TestClass", "TestClass.test_name", or just "test_name".'))
    group.add_argument(
        '-p',
        metavar='pattern',
        help='Specify a regexp filename pattern for inclusion in the test suite')
    group.add_argument('--excluded', metavar='exclusion-file', action='append', help=textwrap.dedent(
        '''Specify a file for tests to exclude. File should contain lists of regular expressions for test files or methods,
                                with each list under a matching header (xfail files, xfail methods, skip files, skip methods)'''))
    group.add_argument(
        '-G',
        '--category',
        metavar='category',
        action='append',
        dest='categories_list',
        help=textwrap.dedent('''Specify categories of test cases of interest. Can be specified more than once.'''))
    group.add_argument(
        '--skip-category',
        metavar='category',
        action='append',
        dest='skip_categories',
        help=textwrap.dedent('''Specify categories of test cases to skip. Takes precedence over -G. Can be specified more than once.'''))
    group.add_argument(
        '--xfail-category',
        metavar='category',
        action='append',
        dest='xfail_categories',
        help=textwrap.dedent('''Specify categories of test cases that are expected to fail. Can be specified more than once.'''))

    # Configuration options
    group = parser.add_argument_group('Configuration options')
    group.add_argument(
        '--framework',
        metavar='framework-path',
        help='The path to LLDB.framework')
    group.add_argument(
        '--executable',
        metavar='executable-path',
        help='The path to the lldb executable')
    group.add_argument(
        '--out-of-tree-debugserver',
        dest='out_of_tree_debugserver',
        action='store_true',
        help='A flag to indicate an out-of-tree debug server is being used')
    group.add_argument(
        '--dwarf-version',
        metavar='dwarf_version',
        dest='dwarf_version',
        type=int,
        help='Override the DWARF version.')
    group.add_argument(
        '--setting',
        metavar='SETTING=VALUE',
        dest='settings',
        type=str,
        nargs=1,
        action='append',
        help='Run "setting set SETTING VALUE" before executing any test.')
    group.add_argument(
        '-y',
        type=int,
        metavar='count',
        help="Specify the iteration count used to collect our benchmarks. An example is the number of times to do 'thread step-over' to measure stepping speed.")
    group.add_argument(
        '-#',
        type=int,
        metavar='sharp',
        dest='sharp',
        help='Repeat the test suite for a specified number of times')
    group.add_argument('--channel', metavar='channel', dest='channels', action='append', help=textwrap.dedent(
        "Specify the log channels (and optional categories) e.g. 'lldb all' or 'gdb-remote packets' if no categories are specified, 'default' is used"))
    group.add_argument(
        '--log-success',
        dest='log_success',
        action='store_true',
        help="Leave logs/traces even for successful test runs (useful for creating reference log files during debugging.)")
    group.add_argument(
        '--codesign-identity',
        metavar='Codesigning identity',
        default='lldb_codesign',
        help='The codesigning identity to use')
    group.add_argument(
        '--build-dir',
        dest='test_build_dir',
        metavar='Test build directory',
        default='lldb-test-build.noindex',
        help='The root build directory for the tests. It will be removed before running.')
    group.add_argument(
        '--lldb-module-cache-dir',
        dest='lldb_module_cache_dir',
        metavar='The clang module cache directory used by LLDB',
        help='The clang module cache directory used by LLDB. Defaults to <test build directory>/module-cache-lldb.')
    group.add_argument(
        '--clang-module-cache-dir',
        dest='clang_module_cache_dir',
        metavar='The clang module cache directory used by Clang',
        help='The clang module cache directory used in the Make files by Clang while building tests. Defaults to <test build directory>/module-cache-clang.')
    group.add_argument(
        '--lldb-libs-dir',
        dest='lldb_libs_dir',
        metavar='path',
        help='The path to LLDB library directory (containing liblldb)')
    group.add_argument(
        '--enable-plugin',
        dest='enabled_plugins',
        action='append',
        type=str,
        metavar='A plugin whose tests will be enabled',
        help='A plugin whose tests will be enabled. The only currently supported plugin is intel-pt.')

    # Configuration options
    group = parser.add_argument_group('Remote platform options')
    group.add_argument(
        '--platform-name',
        dest='lldb_platform_name',
        metavar='platform-name',
        help='The name of a remote platform to use')
    group.add_argument(
        '--platform-url',
        dest='lldb_platform_url',
        metavar='platform-url',
        help='A LLDB platform URL to use when connecting to a remote platform to run the test suite')
    group.add_argument(
        '--platform-working-dir',
        dest='lldb_platform_working_dir',
        metavar='platform-working-dir',
        help='The directory to use on the remote platform.')

    # Test-suite behaviour
    group = parser.add_argument_group('Runtime behaviour options')
    X('-d', 'Suspend the process after launch to wait indefinitely for a debugger to attach')
    X('-t', 'Turn on tracing of lldb command and other detailed test executions')
    group.add_argument(
        '-u',
        dest='unset_env_varnames',
        metavar='variable',
        action='append',
        help='Specify an environment variable to unset before running the test cases. e.g., -u DYLD_INSERT_LIBRARIES -u MallocScribble')
    group.add_argument(
        '--env',
        dest='set_env_vars',
        metavar='variable',
        action='append',
        help='Specify an environment variable to set to the given value before running the test cases e.g.: --env CXXFLAGS=-O3 --env DYLD_INSERT_LIBRARIES')
    group.add_argument(
        '--inferior-env',
        dest='set_inferior_env_vars',
        metavar='variable',
        action='append',
        help='Specify an environment variable to set to the given value for the inferior.')
    X('-v', 'Do verbose mode of unittest framework (print out each test case invocation)')
    group.add_argument(
        '--enable-crash-dialog',
        dest='disable_crash_dialog',
        action='store_false',
        help='(Windows only) When LLDB crashes, display the Windows crash dialog.')
    group.set_defaults(disable_crash_dialog=True)

    # Remove the reference to our helper function
    del X

    group = parser.add_argument_group('Test directories')
    group.add_argument(
        'args',
        metavar='test-dir',
        nargs='*',
        help='Specify a list of directory names to search for test modules named after Test*.py (test discovery). If empty, search from the current working directory instead.')

    return parser