# cli.py - Command line interface for automation

#

# Copyright 2019 Gregory Szorc <gregory.szorc@gmail.com>

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

# no-check-code because Python 3 native.

import argparse

import concurrent.futures as futures

import os

import pathlib

import time

from . import (

    aws,

    HGAutomation,

    linux,

    windows,

)

SOURCE_ROOT = pathlib.Path(os.path.abspath(__file__)).parent.parent.parent.parent

DIST_PATH = SOURCE_ROOT / 'dist'

def bootstrap_linux_dev(hga: HGAutomation, aws_region, distros=None,

                        parallel=False):

    c = hga.aws_connection(aws_region)

    if distros:

        distros = distros.split(',')

    else:

        distros = sorted(linux.DISTROS)

    # TODO There is a wonky interaction involving KeyboardInterrupt whereby

    # the context manager that is supposed to terminate the temporary EC2

    # instance doesn't run. Until we fix this, make parallel building opt-in

    # so we don't orphan instances.

    if parallel:

        fs = []

        with futures.ThreadPoolExecutor(len(distros)) as e:

            for distro in distros:

                fs.append(e.submit(aws.ensure_linux_dev_ami, c, distro=distro))

            for f in fs:

                f.result()

    else:

        for distro in distros:

            aws.ensure_linux_dev_ami(c, distro=distro)

    c = hga.aws_connection(aws_region)

    print('Windows development AMI available as %s' % image.id)

    c = hga.aws_connection(aws_region)

    DIST_PATH.mkdir(exist_ok=True)

    with aws.temporary_windows_dev_instances(c, image, 't3.medium') as insts:

        instance = insts[0]

        windows.synchronize_hg(SOURCE_ROOT, revision, instance)

        for a in arch:

            windows.build_inno_installer(instance.winrm_client, a,

                                         DIST_PATH,

                                         version=version)

    c = hga.aws_connection(aws_region)

    DIST_PATH.mkdir(exist_ok=True)

    with aws.temporary_windows_dev_instances(c, image, 't3.medium') as insts:

        instance = insts[0]

        windows.synchronize_hg(SOURCE_ROOT, revision, instance)

        for a in arch:

            windows.build_wix_installer(instance.winrm_client, a,

                                        DIST_PATH, version=version)

    c = hga.aws_connection(aws_region)

    DIST_PATH.mkdir(exist_ok=True)

    with aws.temporary_windows_dev_instances(c, image, 't3.medium') as insts:

        instance = insts[0]

        windows.synchronize_hg(SOURCE_ROOT, revision, instance)

        for a in arch:

            windows.build_wheel(instance.winrm_client, a, DIST_PATH)

def build_all_windows_packages(hga: HGAutomation, aws_region, revision,

    c = hga.aws_connection(aws_region)

    DIST_PATH.mkdir(exist_ok=True)

    with aws.temporary_windows_dev_instances(c, image, 't3.medium') as insts:

        instance = insts[0]

        winrm_client = instance.winrm_client

        windows.synchronize_hg(SOURCE_ROOT, revision, instance)

        for arch in ('x86', 'x64'):

            windows.purge_hg(winrm_client)

            windows.build_wheel(winrm_client, arch, DIST_PATH)

            windows.purge_hg(winrm_client)

            windows.build_inno_installer(winrm_client, arch, DIST_PATH,

                                         version=version)

            windows.purge_hg(winrm_client)

            windows.build_wix_installer(winrm_client, arch, DIST_PATH,

                                        version=version)

def terminate_ec2_instances(hga: HGAutomation, aws_region):

    c = hga.aws_connection(aws_region, ensure_ec2_state=False)

    aws.terminate_ec2_instances(c.ec2resource)

def purge_ec2_resources(hga: HGAutomation, aws_region):

    c = hga.aws_connection(aws_region, ensure_ec2_state=False)

    aws.remove_resources(c)

def run_tests_linux(hga: HGAutomation, aws_region, instance_type,

                    python_version, test_flags, distro, filesystem):

    c = hga.aws_connection(aws_region)

    image = aws.ensure_linux_dev_ami(c, distro=distro)

    t_start = time.time()

    ensure_extra_volume = filesystem not in ('default', 'tmpfs')

    with aws.temporary_linux_dev_instances(

        c, image, instance_type,

        ensure_extra_volume=ensure_extra_volume) as insts:

        instance = insts[0]

        linux.prepare_exec_environment(instance.ssh_client,

                                       filesystem=filesystem)

        linux.synchronize_hg(SOURCE_ROOT, instance, '.')

        t_prepared = time.time()

        linux.run_tests(instance.ssh_client, python_version,

                        test_flags)

        t_done = time.time()

    t_setup = t_prepared - t_start

    t_all = t_done - t_start

    print(

        'total time: %.1fs; setup: %.1fs; tests: %.1fs; setup overhead: %.1f%%'

        % (t_all, t_setup, t_done - t_prepared, t_setup / t_all * 100.0))

def run_tests_windows(hga: HGAutomation, aws_region, instance_type,

    c = hga.aws_connection(aws_region)

    with aws.temporary_windows_dev_instances(c, image, instance_type,

                                             disable_antivirus=True) as insts:

        instance = insts[0]

        windows.synchronize_hg(SOURCE_ROOT, '.', instance)

        windows.run_tests(instance.winrm_client, python_version, arch,

                          test_flags)

def get_parser():

    parser = argparse.ArgumentParser()

    parser.add_argument(

        '--state-path',

        default='~/.hgautomation',

        help='Path for local state files',

    )

    parser.add_argument(

        '--aws-region',

        help='AWS region to use',

        default='us-west-1',

    )

    subparsers = parser.add_subparsers()

    sp = subparsers.add_parser(

        'bootstrap-linux-dev',

        help='Bootstrap Linux development environments',

    )

    sp.add_argument(

        '--distros',

        help='Comma delimited list of distros to bootstrap',

    )

    sp.add_argument(

        '--parallel',

        action='store_true',

        help='Generate AMIs in parallel (not CTRL-c safe)'

    )

    sp.set_defaults(func=bootstrap_linux_dev)

    sp = subparsers.add_parser(

        'bootstrap-windows-dev',

        help='Bootstrap the Windows development environment',

    )

    sp.set_defaults(func=bootstrap_windows_dev)

    sp = subparsers.add_parser(

        'build-all-windows-packages',

        help='Build all Windows packages',

    )

    sp.add_argument(

        '--revision',

        help='Mercurial revision to build',

        default='.',

    )

    sp.add_argument(

        '--version',

        help='Mercurial version string to use',

    )

    sp.set_defaults(func=build_all_windows_packages)

    sp = subparsers.add_parser(

        'build-inno',

        help='Build Inno Setup installer(s)',

    )

    sp.add_argument(

        '--arch',

        help='Architecture to build for',

        choices={'x86', 'x64'},

        nargs='*',

        default=['x64'],

    )

    sp.add_argument(

        '--revision',

        help='Mercurial revision to build',

        default='.',

    )

    sp.add_argument(

        '--version',

        help='Mercurial version string to use in installer',

    )

    sp.set_defaults(func=build_inno)

    sp = subparsers.add_parser(

        'build-windows-wheel',

        help='Build Windows wheel(s)',

    )

    sp.add_argument(

        '--arch',

        help='Architecture to build for',

        choices={'x86', 'x64'},

        nargs='*',

        default=['x64'],

    )

    sp.add_argument(

        '--revision',

        help='Mercurial revision to build',

        default='.',

    )

    sp.set_defaults(func=build_windows_wheel)

    sp = subparsers.add_parser(

        'build-wix',

        help='Build WiX installer(s)'

    )

    sp.add_argument(

        '--arch',

        help='Architecture to build for',

        choices={'x86', 'x64'},

        nargs='*',

        default=['x64'],

    )

    sp.add_argument(

        '--revision',

        help='Mercurial revision to build',

        default='.',

    )

    sp.add_argument(

        '--version',

        help='Mercurial version string to use in installer',

    )

    sp.set_defaults(func=build_wix)

    sp = subparsers.add_parser(

        'terminate-ec2-instances',

        help='Terminate all active EC2 instances managed by us',

    )

    sp.set_defaults(func=terminate_ec2_instances)

    sp = subparsers.add_parser(

        'purge-ec2-resources',

        help='Purge all EC2 resources managed by us',

    )

    sp.set_defaults(func=purge_ec2_resources)

    sp = subparsers.add_parser(

        'run-tests-linux',

        help='Run tests on Linux',

    )

    sp.add_argument(

        '--distro',

        help='Linux distribution to run tests on',

        choices=linux.DISTROS,

        default='debian9',

    )

    sp.add_argument(

        '--filesystem',

        help='Filesystem type to use',

        choices={'btrfs', 'default', 'ext3', 'ext4', 'jfs', 'tmpfs', 'xfs'},

        default='default',

    )

    sp.add_argument(

        '--instance-type',

        help='EC2 instance type to use',

        default='c5.9xlarge',

    )

    sp.add_argument(

        '--python-version',

        help='Python version to use',

        choices={'system2', 'system3', '2.7', '3.5', '3.6', '3.7', '3.8',

                 'pypy', 'pypy3.5', 'pypy3.6'},

        default='system2',

    )

    sp.add_argument(

        'test_flags',

        help='Extra command line flags to pass to run-tests.py',

        nargs='*',

    )

    sp.set_defaults(func=run_tests_linux)

    sp = subparsers.add_parser(

        'run-tests-windows',

        help='Run tests on Windows',

    )

    sp.add_argument(

        '--instance-type',

        help='EC2 instance type to use',

        default='t3.medium',

    )

    sp.add_argument(

        '--python-version',

        help='Python version to use',

        choices={'2.7', '3.5', '3.6', '3.7', '3.8'},

        default='2.7',

    )

    sp.add_argument(

        '--arch',

        help='Architecture to test',

        choices={'x86', 'x64'},

        default='x64',

    )

    sp.add_argument(

        '--test-flags',

        help='Extra command line flags to pass to run-tests.py',

    )