#!/usr/bin/env python
from __future__ import absolute_import, print_function, division
from os.path import join
import contextlib
import os
import shutil
import subprocess
import re
import shlex
import runpy
import zipfile
import tarfile
import platform
import sys
import click

# https://virtualenv.pypa.io/en/latest/userguide.html#windows-notes
# scripts and executables on Windows go in ENV\Scripts\ instead of ENV/bin/
if platform.system() == "Windows":
    VENV_BIN = "Scripts"
else:
    VENV_BIN = "bin"

if platform.system() == "Windows":
    def Archive(name):
        a = zipfile.ZipFile(name + ".zip", "w")
        a.add = a.write
        return a
else:
    def Archive(name):
        return tarfile.open(name + ".tar.gz", "w:gz")

RELEASE_DIR = join(os.path.dirname(os.path.realpath(__file__)))
DIST_DIR = join(RELEASE_DIR, "dist")
ROOT_DIR = join(RELEASE_DIR, "..")

BUILD_DIR = join(RELEASE_DIR, "build")
PYINSTALLER_TEMP = join(BUILD_DIR, "pyinstaller")
PYINSTALLER_DIST = join(BUILD_DIR, "binaries")

VENV_DIR = join(BUILD_DIR, "venv")
VENV_PIP = join(VENV_DIR, VENV_BIN, "pip")
VENV_PYINSTALLER = join(VENV_DIR, VENV_BIN, "pyinstaller")

ALL_PROJECTS = {
    "netlib": {
        "tools": [],
        "vfile": join(ROOT_DIR, "netlib/netlib/version.py"),
        "dir": join(ROOT_DIR, "netlib")
    },
    "pathod": {
        "tools": ["pathod", "pathoc"],
        "vfile": join(ROOT_DIR, "pathod/libpathod/version.py"),
        "dir": join(ROOT_DIR, "pathod")
    },
    "mitmproxy": {
        "tools": ["mitmproxy", "mitmdump", "mitmweb"],
        "vfile": join(ROOT_DIR, "mitmproxy/libmproxy/version.py"),
        "dir": join(ROOT_DIR, "mitmproxy")
    }
}
if platform.system() == "Windows":
    ALL_PROJECTS["mitmproxy"]["tools"].remove("mitmproxy")

projects = {}


def get_version(project):
    return runpy.run_path(projects[project]["vfile"])["VERSION"]


def sdist_name(project):
    return "{project}-{version}.tar.gz".format(
        project=project,
        version=get_version(project)
    )


def wheel_name(project):
    return "{project}-{version}-py{py_version}-none-any.whl".format(
        project=project,
        version=get_version(project),
        py_version=sys.version_info.major
    )


@contextlib.contextmanager
def empty_pythonpath():
    """
    Make sure that the regular python installation is not on the python path,
    which would give us access to modules installed outside of our virtualenv.
    """
    pythonpath = os.environ.get("PYTHONPATH", "")
    os.environ["PYTHONPATH"] = ""
    yield
    os.environ["PYTHONPATH"] = pythonpath


@contextlib.contextmanager
def chdir(path):
    old_dir = os.getcwd()
    os.chdir(path)
    yield
    os.chdir(old_dir)


@click.group(chain=True)
@click.option(
    '--project', '-p',
    multiple=True, type=click.Choice(ALL_PROJECTS.keys()), default=ALL_PROJECTS.keys()
)
def cli(project):
    """
    mitmproxy build tool
    """
    for name in project:
        projects[name] = ALL_PROJECTS[name]


@cli.command("contributors")
def contributors():
    """
    Update CONTRIBUTORS.md
    """
    for project, conf in projects.items():
        with chdir(conf["dir"]):
            print("Updating %s/CONTRIBUTORS..." % project)
            contributors_data = subprocess.check_output(
                shlex.split("git shortlog -n -s")
            )
            with open("CONTRIBUTORS", "w") as f:
                f.write(contributors_data)


@cli.command("set-version")
@click.argument('version')
def set_version(version):
    """
    Update version information
    """
    print("Update versions...")
    version = ", ".join(version.split("."))
    for p, conf in projects.items():
        print("Update %s..." % os.path.normpath(conf["vfile"]))
        with open(conf["vfile"], "rb") as f:
            content = f.read()
        new_content = re.sub(
            r"IVERSION\s*=\s*\([\d,\s]+\)", "IVERSION = (%s)" % version,
            content
        )
        with open(conf["vfile"], "wb") as f:
            f.write(new_content)


@cli.command("git")
@click.argument('args', nargs=-1, required=True)
def git(args):
    """
    Run a git command on every project
    """
    args = ["git"] + list(args)
    for project, conf in projects.items():
        print("%s> %s..." % (project, " ".join(args)))
        subprocess.check_call(
            args,
            cwd=conf["dir"]
        )


@cli.command("sdist")
def sdist():
    """
    Build a source distribution
    """
    with empty_pythonpath():
        print("Building release...")
        if os.path.exists(DIST_DIR):
            shutil.rmtree(DIST_DIR)
        for project, conf in projects.items():
            print("Creating %s source distribution..." % project)
            subprocess.check_call(
                [
                    "python", "./setup.py", "-q",
                    "sdist", "--dist-dir", DIST_DIR, "--formats=gztar",
                    "bdist_wheel", "--dist-dir", DIST_DIR,
                ],
                cwd=conf["dir"]
            )

        print("Creating virtualenv for test install...")
        if os.path.exists(VENV_DIR):
            shutil.rmtree(VENV_DIR)
        subprocess.check_call(["virtualenv", "-q", VENV_DIR])

        with chdir(DIST_DIR):
            for project, conf in projects.items():
                print("Installing %s..." % project)
                subprocess.check_call([VENV_PIP, "install", "-q", sdist_name(project)])

            print("Running binaries...")
            for project, conf in projects.items():
                for tool in conf["tools"]:
                    tool = join(VENV_DIR, VENV_BIN, tool)
                    print("> %s --version" % tool)
                    print(subprocess.check_output([tool, "--version"]))

            print("Virtualenv available for further testing:")
            print("source %s" % os.path.normpath(join(VENV_DIR, VENV_BIN, "activate")))


@cli.command("bdist")
@click.option("--use-existing-sdist/--no-use-existing-sdist", default=False)
@click.argument("pyinstaller_version", envvar="PYINSTALLER_VERSION", default="PyInstaller~=3.1.1")
@click.pass_context
def bdist(ctx, use_existing_sdist, pyinstaller_version):
    """
    Build a binary distribution
    """
    if os.path.exists(PYINSTALLER_TEMP):
        shutil.rmtree(PYINSTALLER_TEMP)
    if os.path.exists(PYINSTALLER_DIST):
        shutil.rmtree(PYINSTALLER_DIST)

    if not use_existing_sdist:
        ctx.invoke(sdist)

    print("Installing PyInstaller...")
    subprocess.check_call([VENV_PIP, "install", "-q", pyinstaller_version])

    for p, conf in projects.items():
        if conf["tools"]:
            archive_name = "{project}-{version}-{platform}".format(
                project=p,
                version=get_version(p),
                platform={
                    "Darwin": "osx",
                    "Windows": "win32",
                    "Linux": "linux"
                }.get(platform.system(), platform.system())
            )
            with Archive(join(DIST_DIR, archive_name)) as archive:
                for tool in conf["tools"]:
                    spec = join(conf["dir"], "release", "%s.spec" % tool)
                    print("Building %s binary..." % tool)
                    subprocess.check_call(
                        [
                            VENV_PYINSTALLER,
                            "--clean",
                            "--workpath", PYINSTALLER_TEMP,
                            "--distpath", PYINSTALLER_DIST,
                            # This is PyInstaller, so setting a 
                            # different log level obviously breaks it :-)
                            # "--log-level", "WARN",
                            spec
                        ]
                    )

                    # Test if it works at all O:-)
                    executable = join(PYINSTALLER_DIST, tool)
                    if platform.system() == "Windows":
                        executable += ".exe"
                    print("Testinng %s..." % executable)
                    subprocess.check_call([executable, "--version"])

                    archive.add(executable, os.path.basename(executable))
            print("Packed {}.".format(archive_name))


@cli.command("upload")
@click.option('--username', prompt=True)
@click.password_option(confirmation_prompt=False)
@click.option('--repository', default="pypi")
def upload_release(username, password, repository):
    """
    Upload source distributions to PyPI
    """
    for project in projects.keys():
        files = (
            sdist_name(project),
            wheel_name(project)
        )
        for f in files:
            print("Uploading {} to {}...".format(f, repository))
            subprocess.check_call([
                "twine",
                "upload",
                "-u", username,
                "-p", password,
                "-r", repository,
                join(DIST_DIR, f)
            ])


@cli.command("wizard")
@click.option('--version', prompt=True)
@click.option('--username', prompt="PyPI Username")
@click.password_option(confirmation_prompt=False, prompt="PyPI Password")
@click.option('--repository', default="pypi")
@click.pass_context
def wizard(ctx, version, username, password, repository):
    """
    Interactive Release Wizard
    """
    for project, conf in projects.items():
        is_dirty = subprocess.check_output(["git", "status", "--porcelain"], cwd=conf["dir"])
        if is_dirty:
            raise RuntimeError("%s repository is not clean." % project)

    # bump version, update docs and contributors
    ctx.invoke(set_version, version=version)
    ctx.invoke(contributors)

    # Build test release
    ctx.invoke(bdist)
    click.confirm("Please test the release now. Is it ok?", abort=True)

    # version bump commit + tag
    ctx.invoke(
        git, args=["commit", "-a", "-m", "bump version"]
    )
    ctx.invoke(git, args=["tag", "v" + version])
    ctx.invoke(git, args=["push"])
    ctx.invoke(git, args=["push", "--tags"])

    # Re-invoke sdist with bumped version
    ctx.invoke(sdist)
    click.confirm("All good, can upload sdist to PyPI?", abort=True)
    ctx.invoke(
        upload_release,
        username=username, password=password, repository=repository
    )
    click.echo("All done!")


if __name__ == "__main__":
    cli()