# Taken from pip
# see https://github.com/pypa/pip/blob/95bcf8c5f6394298035a7332c441868f3b0169f4/tasks/vendoring/__init__.py
""""Vendoring script, python 3.6>= needed"""

import itertools
import re
import shutil
import tarfile
import zipfile
from pathlib import Path
from tempfile import TemporaryDirectory

import bs4
import invoke
import requests
from urllib3.util import parse_url as urllib3_parse

from pipenv.utils.fileutils import open_file

TASK_NAME = "update"

LIBRARY_DIRNAMES = {
    "requirements-parser": "requirements",
    "backports.shutil_get_terminal_size": "backports/shutil_get_terminal_size",
    "python-dotenv": "dotenv",
    "setuptools": "pkg_resources",
    "msgpack-python": "msgpack",
}

# from time to time, remove the no longer needed ones
HARDCODED_LICENSE_URLS = {
    "cursor": "https://raw.githubusercontent.com/GijsTimmers/cursor/master/LICENSE",
    "CacheControl": "https://raw.githubusercontent.com/ionrock/cachecontrol/master/LICENSE.txt",
    "click-didyoumean": "https://raw.githubusercontent.com/click-contrib/click-didyoumean/master/LICENSE",
    "click-completion": "https://raw.githubusercontent.com/click-contrib/click-completion/master/LICENSE",
    "pytoml": "https://github.com/avakar/pytoml/raw/master/LICENSE",
    "webencodings": "https://github.com/SimonSapin/python-webencodings/raw/"
    "master/LICENSE",
    "distlib": "https://github.com/vsajip/distlib/raw/master/LICENSE.txt",
    "pythonfinder": "https://raw.githubusercontent.com/techalchemy/pythonfinder/master/LICENSE.txt",
    "pipdeptree": "https://raw.githubusercontent.com/tox-dev/pipdeptree/main/LICENSE",
}

FILE_WHITE_LIST = (
    "Makefile",
    "vendor.txt",
    "patched.txt",
    "__init__.py",
    "README.rst",
    "README.md",
    "safety.zip",
    "cacert.pem",
    "vendor_pip.txt",
)

PATCHED_RENAMES = {}

LIBRARY_RENAMES = {
    "pip": "pipenv.patched.pip",
    "requests": "pipenv.patched.pip._vendor.requests",
    # "pep517": "pipenv.patched.pip._vendor.pep517",
    "pkg_resources": "pipenv.patched.pip._vendor.pkg_resources",
    "pyparsing": "pipenv.patched.pip._vendor.pyparsing",
    "ruamel.yaml": "pipenv.vendor.ruamel.yaml",
    "urllib3": "pipenv.patched.pip._vendor.urllib3",
}

GLOBAL_REPLACEMENT = [
    (r"(?<!\.)\bpip\._vendor", r"pipenv.patched.pip._vendor"),
    (r"(?<!\.)\bpip\._internal", r"pipenv.patched.pip._internal"),
    (r"(?<!\.)\bpippipenv\.patched\.notpip", r"pipenv.patched.pip"),
    (
        r"(?<!\.)import pep517\.envbuild",
        r"from pipenv.vendor.pep517 import envbuild",
    ),
    (
        r"(?<!\.)import pep517\.wrappers",
        r"from pipenv.vendor.pep517 import wrappers",
    ),
    (
        r"from cached_property import cached_property",
        r"from pipenv.patched.pip._vendor.pyparsing.core import cached_property",
    ),
    (r"from pyparsing import", r"from pipenv.patched.pip._vendor.pyparsing import"),
    (r"(?<!\.)pep517\.envbuild", r"envbuild"),
    (r"(?<!\.)pep517\.wrappers", r"wrappers"),
    (r" ruamel\.yaml", r" ruamel"),
    (
        "from platformdirs import user_cache_dir",
        "from pipenv.patched.pip._vendor.platformdirs import user_cache_dir",
    ),
    ("from distlib import", "from pipenv.patched.pip._vendor.distlib import"),
    ("    import tomli", "    from pipenv.patched.pip._vendor import tomli"),
    (
        "from distlib.metadata import",
        "from pipenv.patched.pip._vendor.distlib.metadata import",
    ),
    ("from distlib.wheel import", "from pipenv.patched.pip._vendor.distlib.wheel import"),
    (
        "from typing_extensions import",
        "from pipenv.patched.pip._vendor.typing_extensions import",
    ),
    (
        "import zipp",
        "from pipenv.vendor import zipp",
    ),
    (
        "from pipenv.patched.pip._vendor.typing_extensions",
        "from pipenv.patched.pip._vendor.typing_extensions",
    ),
]


LICENSE_RENAMES = {"pythonfinder/LICENSE": "pythonfinder/pep514tools.LICENSE"}


def drop_dir(path):
    if path.exists() and path.is_dir():
        shutil.rmtree(str(path), ignore_errors=True)


def remove_all(paths):
    for path in paths:
        if path.is_dir():
            drop_dir(path)
        elif path.exists():
            print(f"Removing {path}")
            path.unlink()


def log(msg):
    print(f"[vendoring.{TASK_NAME}] {msg}")


def _get_git_root(ctx):
    return Path(ctx.run("git rev-parse --show-toplevel", hide=True).stdout.strip())


def _get_vendor_dir(ctx):
    return _get_git_root(ctx) / "pipenv" / "vendor"


def _get_patched_dir(ctx):
    return _get_git_root(ctx) / "pipenv" / "patched"


def clean_vendor(ctx, vendor_dir):
    # Old _vendor cleanup
    remove_all(vendor_dir.glob("*.pyc"))
    log(f"Cleaning {vendor_dir}")
    for item in vendor_dir.iterdir():
        if item.is_dir():
            shutil.rmtree(str(item))
        elif item.name not in FILE_WHITE_LIST:
            item.unlink()
        else:
            log(f"Skipping {item}")


def detect_all_vendored_libs(ctx):
    types = ("patched", "vendor")
    retval = {}

    for type_ in types:
        vendor_dir = _get_vendor_dir(ctx) if type_ == "vendor" else _get_patched_dir(ctx)

        for item in vendor_dir.iterdir():
            name = None
            if item.name == "__pycache__":
                continue
            elif item.is_dir():
                name = item.name
            elif "LICENSE" in item.name or "COPYING" in item.name:
                continue
            elif item.name.endswith(".pyi"):
                continue
            elif item.name not in FILE_WHITE_LIST:
                name = item.name[:-3]
            if name is not None and name not in LIBRARY_RENAMES:
                retval[name] = f"pipenv.{type_}.{name}"
    retval.update(LIBRARY_RENAMES)
    return retval


def detect_vendored_libs(vendor_dir):
    retval = []
    for item in vendor_dir.iterdir():
        if item.name == "__pycache__":
            continue
        elif item.is_dir():
            retval.append(item.name)
        elif "LICENSE" in item.name or "COPYING" in item.name:
            continue
        elif item.name.endswith(".pyi"):
            continue
        elif item.name not in FILE_WHITE_LIST:
            retval.append(item.name[:-3])
    return retval


def rewrite_imports(package_dir, vendored_libs):
    for item in package_dir.iterdir():
        if item.is_dir():
            rewrite_imports(item, vendored_libs)
        elif item.name.endswith(".py"):
            rewrite_file_imports(item, vendored_libs)


def rewrite_file_imports(item, vendored_libs):
    """Rewrite 'import xxx' and 'from xxx import' for vendored_libs"""
    # log('Reading file: %s' % item)
    try:
        text = item.read_text(encoding="utf-8")
    except UnicodeDecodeError:
        text = item.read_text(encoding="cp1252")

    for lib, to_lib in vendored_libs.items():
        text = re.sub(
            rf"(?m)^(\s*)import {lib}((?:\.\S*)?\s+as)",
            rf"\1import {to_lib}\2",
            text,
        )
        text = re.sub(rf"(?m)^(\s*)from {lib}([\s\.]+)", rf"\1from {to_lib}\2", text)
        text = re.sub(
            rf"(?m)^(\s*)import {lib}(\s*[,\n#])",
            rf"\1import {to_lib} as {lib}\2",
            text,
        )
    for pattern, sub in GLOBAL_REPLACEMENT:
        text = re.sub(pattern, sub, text)
    item.write_text(text, encoding="utf-8")


def apply_patch(ctx, patch_file_path):
    log(f"Applying patch {patch_file_path.name}")
    ctx.run(f"git apply --ignore-whitespace --verbose {patch_file_path}")


def _recursive_write_to_zip(zf, path, root=None):
    if path == Path(zf.filename):
        return
    if root is None:
        if not path.is_dir():
            raise ValueError("root is required for non-directory path")
        root = path
    if not path.is_dir():
        zf.write(str(path), str(path.relative_to(root)))
        return
    for c in path.iterdir():
        _recursive_write_to_zip(zf, c, root)


def rename_if_needed(ctx, vendor_dir, item):
    rename_dict = LIBRARY_RENAMES if vendor_dir.name != "patched" else PATCHED_RENAMES
    new_path = None
    if item.name in rename_dict or item.name in LIBRARY_DIRNAMES:
        new_name = rename_dict.get(item.name, LIBRARY_DIRNAMES.get(item.name))
        new_path = item.parent / new_name
        log(f"Renaming {item.name} => {new_path}")
        # handle existing directories
        try:
            item.rename(str(new_path))
        except OSError:
            for child in item.iterdir():
                child.rename(str(new_path / child.name))


def _ensure_package_in_requirements(ctx, requirements_file, package):
    requirement = None
    log(f"using requirements file: {requirements_file}")
    req_file_lines = list(requirements_file.read_text().splitlines())
    if package:
        match = [r for r in req_file_lines if r.strip().lower().startswith(package)]
        matched_req = None
        if match:
            for m in match:
                specifiers = [m.index(s) for s in [">", "<", "=", "~"] if s in m]
                if m.lower() == package or (
                    specifiers and m[: min(specifiers)].lower() == package
                ):
                    matched_req = f"{m}"
                    requirement = matched_req
                    log(f"Matched req: {matched_req!r}")
        if not matched_req:
            req_file_lines.append(f"{package}")
            log(f"Writing requirements file: {requirements_file}")
            requirements_file.write_text("\n".join(req_file_lines))
            requirement = f"{package}"
    return requirement


def install(ctx, vendor_dir, package=None):
    requirements_file = vendor_dir / f"{vendor_dir.name}.txt"
    requirement = f"-r {requirements_file.as_posix()}"
    log(f"Using requirements file: {requirement}")
    if package:
        requirement = _ensure_package_in_requirements(ctx, requirements_file, package)
    # We use --no-deps because we want to ensure that all of our dependencies
    # are added to vendor.txt, this includes all dependencies recursively up
    # the chain.
    ctx.run(
        f"pip install -t {vendor_dir.as_posix()} --no-compile --no-deps --upgrade {requirement}"
    )
    # read licenses from distinfo files if possible
    for path in vendor_dir.glob("*.dist-info"):
        pkg, _, _ = path.stem.rpartition("-")
        license_file = path / "LICENSE"
        if not license_file.exists():
            continue
        if vendor_dir.joinpath(pkg).exists():
            vendor_dir.joinpath(pkg).joinpath("LICENSE").write_text(
                license_file.read_text()
            )
        elif vendor_dir.joinpath(f"{pkg}.py").exists():
            vendor_dir.joinpath(f"{pkg}.LICENSE").write_text(license_file.read_text())
        else:
            pkg = pkg.replace("-", "?").replace("_", "?")
            matched_path = next(iter(pth for pth in vendor_dir.glob(f"{pkg}*")), None)
            if matched_path is not None:
                if matched_path.is_dir():
                    target = vendor_dir.joinpath(matched_path).joinpath("LICENSE")
                else:
                    target = vendor_dir.joinpath(f"{matched_path}.LICENSE")
                target.write_text(license_file.read_text())


def post_install_cleanup(ctx, vendor_dir):
    log("Removing unused modules and files ...")
    remove_all(vendor_dir.glob("*.dist-info"))
    remove_all(vendor_dir.glob("*.egg-info"))

    # Cleanup setuptools unneeded parts
    drop_dir(vendor_dir / "bin")
    drop_dir(vendor_dir / "tests")
    drop_dir(vendor_dir / "shutil_backports")
    drop_dir(vendor_dir / "cerberus" / "tests")
    drop_dir(vendor_dir / "cerberus" / "benchmarks")
    drop_dir(vendor_dir / "colorama" / "tests")

    remove_all(vendor_dir.glob("toml.py"))

    remove_all(
        (
            vendor_dir / "dotenv" / "cli.py",
            vendor_dir / "dotenv" / "__main__.py",
            vendor_dir / "plette" / "__main__.py",
            vendor_dir / "pythonfinder" / "__main__.py",
            vendor_dir / "pythonfinder" / "cli.py",
        )
    )


@invoke.task
def apply_patches(ctx, patched=False, pre=False):
    if patched:
        vendor_dir = _get_patched_dir(ctx)
    else:
        vendor_dir = _get_vendor_dir(ctx)
    log("Applying pre-patches...")
    patch_dir = Path(__file__).parent / "patches" / vendor_dir.name
    if pre:
        if not patched:
            pass
        for patch in patch_dir.glob("*.patch"):
            if not patch.name.startswith("_post"):
                apply_patch(ctx, patch)
    else:
        patches = patch_dir.glob("*.patch" if not patched else "_post*.patch")
        for patch in patches:
            apply_patch(ctx, patch)


def vendor(ctx, vendor_dir, package=None, rewrite=True):
    log("Reinstalling vendored libraries")
    is_patched = vendor_dir.name == "patched"
    install(ctx, vendor_dir, package=package)
    log("Running post-install cleanup...")
    post_install_cleanup(ctx, vendor_dir)
    # Detect the vendored packages/modules
    vendored_libs = detect_all_vendored_libs(ctx)
    log("Detected vendored libraries: {}".format(", ".join(vendored_libs)))

    # Apply pre-patches
    log("Applying pre-patches...")
    if is_patched:
        apply_patches(ctx, patched=is_patched, pre=True)
    log("Removing scandir library files...")
    for extension in ("*.so", "*.pyd", "*.egg-info", "*.dist-info"):
        remove_all(vendor_dir.glob(extension))
    for dirname in ("setuptools", "pkg_resources/_vendor", "pkg_resources/extern", "bin"):
        drop_dir(vendor_dir / dirname)

    # Global import rewrites
    log("Renaming specified libs...")
    for item in vendor_dir.iterdir():
        if item.is_dir():
            if rewrite and not package or (package and item.name.lower() in package):
                log(f"Rewriting imports for {item}...")
                rewrite_imports(item, vendored_libs)
            rename_if_needed(ctx, vendor_dir, item)
        elif item.name not in FILE_WHITE_LIST and (
            rewrite and not package or (package and item.stem.lower() in package)
        ):
            rewrite_file_imports(item, vendored_libs)
    if not package:
        apply_patches(ctx, patched=is_patched, pre=False)
        if is_patched:
            piptools_vendor = vendor_dir / "piptools" / "_vendored"
            if piptools_vendor.exists():
                drop_dir(piptools_vendor)
            msgpack = vendor_dir / "pip" / "_vendor" / "msgpack"
            if msgpack.exists():
                remove_all(msgpack.glob("*.so"))


@invoke.task
def redo_imports(ctx, library, vendor_dir=None):
    if vendor_dir is None:
        vendor_dir = _get_vendor_dir(ctx)
    else:
        vendor_dir = Path(vendor_dir).absolute()
    log(f"Using vendor dir: {vendor_dir}")
    vendored_libs = detect_all_vendored_libs(ctx)
    item = vendor_dir / library
    library_name = vendor_dir / f"{library}.py"
    log("Detected vendored libraries: {}".format(", ".join(vendored_libs)))
    log(f"Rewriting imports for {item}...")
    if item.is_dir():
        rewrite_imports(item, vendored_libs)
    else:
        rewrite_file_imports(library_name, vendored_libs)


@invoke.task
def rewrite_all_imports(ctx):
    vendor_dir = _get_vendor_dir(ctx)
    patched_dir = _get_patched_dir(ctx)
    log(f"Using vendor dir: {vendor_dir}")
    vendored_libs = detect_all_vendored_libs(ctx)
    log("Detected vendored libraries: {}".format(", ".join(vendored_libs)))
    log("Rewriting all imports related to vendored libs")
    for item in itertools.chain(patched_dir.iterdir(), vendor_dir.iterdir()):
        if item.is_dir():
            rewrite_imports(item, vendored_libs)
        elif item.name not in FILE_WHITE_LIST:
            rewrite_file_imports(item, vendored_libs)


@invoke.task
def packages_missing_licenses(
    ctx, vendor_dir=None, requirements_file="vendor.txt", package=None
):
    if not vendor_dir:
        vendor_dir = _get_vendor_dir(ctx)
    if package is not None:
        requirements = [package]
    else:
        requirements = vendor_dir.joinpath(requirements_file).read_text().splitlines()
    new_requirements = []
    LICENSE_EXTS = ("rst", "txt", "APACHE", "BSD", "md")
    LICENSES = [
        ".".join(lic)
        for lic in itertools.product(("LICENSE", "LICENSE-MIT"), LICENSE_EXTS)
    ]
    for _, req in enumerate(requirements):
        if req.startswith("git+"):
            pkg = req.strip().split("#egg=")[1]
        else:
            pkg = req.strip().split("=")[0]
        possible_pkgs = [pkg, pkg.replace("-", "_")]
        match_found = False
        if pkg in LIBRARY_DIRNAMES:
            possible_pkgs.append(LIBRARY_DIRNAMES[pkg])
        for pkgpath in possible_pkgs:
            pkgpath = vendor_dir.joinpath(pkgpath)
            py_path = pkgpath.parent / f"{pkgpath.stem}.py"
            if pkgpath.exists() and pkgpath.is_dir():
                for license_path in LICENSES:
                    license_path = pkgpath.joinpath(license_path)
                    if license_path.exists():
                        match_found = True
                        # log("%s: Trying path %s... FOUND" % (pkg, license_path))
                        break
            elif pkgpath.exists() or py_path.exists():
                for license_path in LICENSES:
                    license_name = f"{pkgpath.stem}.{license_path}"
                    license_path = pkgpath.parent / license_name
                    if license_path.exists():
                        match_found = True
                        # log("%s: Trying path %s... FOUND" % (pkg, license_path))
                        break
            if match_found:
                break
        if match_found:
            continue
        else:
            #  log("%s: No license found in %s" % (pkg, pkgpath))
            new_requirements.append(req)
    return new_requirements


@invoke.task
def download_licenses(
    ctx,
    vendor_dir=None,
    requirements_file="vendor.txt",
    package=None,
    only=False,
    patched=False,
):
    import parse

    log("Downloading licenses")
    if not vendor_dir:
        if patched:
            vendor_dir = _get_patched_dir(ctx)
            requirements_file = "patched.txt"
        else:
            vendor_dir = _get_vendor_dir(ctx)
    requirements_file = vendor_dir / requirements_file
    requirements = packages_missing_licenses(
        ctx, vendor_dir, requirements_file, package=package
    )
    log(requirements)
    tmp_dir = vendor_dir / "__tmp__"
    # TODO: Fix this whenever it gets sorted out (see https://github.com/pypa/pip/issues/5739)

    cmd = "pip download --no-binary :all: --only-binary requests_download --no-deps"
    ctx.run("pip install flit")  # needed for the next step
    for req in requirements:
        exe_cmd = f"{cmd} --no-build-isolation -d {tmp_dir.as_posix()} {req}"
        try:
            ctx.run(exe_cmd)
        except invoke.exceptions.UnexpectedExit as e:
            if "ModuleNotFoundErr" in e.result.stderr.strip():
                target = parse.parse(
                    "ModuleNotFoundError: No module named '{backend}'",
                    e.result.stderr.strip().split("\n")[-1],
                )
                backend = target.named.get("backend")
                if backend is not None:
                    if "." in backend:
                        backend, _, _ = backend.partition(".")
                    ctx.run(f"pip install {backend}")
                    ctx.run("pip install hatch-vcs")
            elif "Disabling PEP 517 processing is invalid" not in e.result.stderr:
                log(f"WARNING: Failed to download license for {req}")
                continue
            else:
                parse_target = (
                    "Disabling PEP 517 processing is invalid: project specifies a build "
                    "backend of {backend} in pyproject.toml"
                )
                target = parse.parse(parse_target, e.result.stderr.strip())
                backend = target.named.get("backend")
                if backend is not None:
                    if "." in backend:
                        backend, _, _ = backend.partition(".")
                    ctx.run(f"pip install {backend}")
            ctx.run(f"{cmd} --no-build-isolation -d {tmp_dir.as_posix()} {req}")

    for sdist in tmp_dir.iterdir():
        extract_license(vendor_dir, sdist)
    drop_dir(tmp_dir)


def extract_license(vendor_dir, sdist):
    if sdist.stem.endswith(".tar"):
        ext = sdist.suffix[1:]
        with tarfile.open(sdist, mode=f"r:{ext}") as tar:
            found = find_and_extract_license(vendor_dir, tar, tar.getmembers())
    elif sdist.suffix in (".zip", ".whl"):
        with zipfile.ZipFile(sdist) as zip:
            found = find_and_extract_license(vendor_dir, zip, zip.infolist())
    else:
        raise NotImplementedError("new sdist type!")

    if not found:
        log(f"License not found in {sdist.name}, will download")
        license_fallback(vendor_dir, sdist.name)


def find_and_extract_license(vendor_dir, tar, members):
    found = False
    for member in members:
        try:
            name = member.name
        except AttributeError:  # zipfile
            name = member.filename
        if "LICENSE" in name or "COPYING" in name:
            if "/test" in name:
                # some testing licenses in hml5lib and distlib
                log(f"Ignoring {name}")
                continue
            found = True
            extract_license_member(vendor_dir, tar, member, name)
    return found


def license_fallback(vendor_dir, sdist_name):
    """Hardcoded license URLs. Check when updating if those are still needed"""
    libname = libname_from_dir(sdist_name)
    if libname not in HARDCODED_LICENSE_URLS:
        raise ValueError(f"No hardcoded URL for {libname} license")

    url = HARDCODED_LICENSE_URLS[libname]
    _, _, name = url.rpartition("/")
    dest = license_destination(vendor_dir, libname, name)
    r = requests.get(url, allow_redirects=True, verify=False)
    log(f"Downloading {url}")
    r.raise_for_status()
    dest.write_bytes(r.content)


def libname_from_dir(dirname):
    """Reconstruct the library name without it's version"""
    parts = []
    for part in dirname.split("-"):
        if part[0].isdigit():
            break
        parts.append(part)
    return "-".join(parts)


def license_destination(vendor_dir, libname, filename):
    """Given the (reconstructed) library name, find appropriate destination"""
    normal = vendor_dir / libname
    if normal.is_dir():
        return normal / filename
    lowercase = vendor_dir / libname.lower().replace("-", "_")
    if lowercase.is_dir():
        return lowercase / filename
    # rename_dict = LIBRARY_RENAMES if vendor_dir.name != "patched" else PATCHED_RENAMES
    # Short circuit all logic if we are renaming the whole library
    # if libname in rename_dict:
    #    return vendor_dir / rename_dict[libname] / filename
    if libname in LIBRARY_DIRNAMES:
        override = vendor_dir / LIBRARY_DIRNAMES[libname]
        if not override.exists() and override.parent.exists():
            # for flattened subdeps, specifically backports/weakref.py
            return (vendor_dir / override.parent) / "{override.name}.{filename}"

        license_path = Path(LIBRARY_DIRNAMES[libname]) / filename
        if license_path.as_posix() in LICENSE_RENAMES:
            return vendor_dir / LICENSE_RENAMES[license_path.as_posix()]
        return vendor_dir / LIBRARY_DIRNAMES[libname] / filename
    # fallback to libname.LICENSE (used for nondirs)
    return vendor_dir / f"{libname}.{filename}"


def extract_license_member(vendor_dir, tar, member, name):
    mpath = Path(name)  # relative path inside the sdist
    dirname = list(mpath.parents)[-2].name  # -1 is .
    libname = libname_from_dir(dirname)
    dest = license_destination(vendor_dir, libname, mpath.name)
    log(f"Extracting {name} into {dest}")
    try:
        fileobj = tar.extractfile(member)
        dest.write_bytes(fileobj.read())
    except AttributeError:  # zipfile
        dest.write_bytes(tar.read(member))


@invoke.task()
def generate_patch(ctx, package_path, patch_description, base="HEAD"):
    pkg = Path(package_path)
    if len(pkg.parts) != 2 or pkg.parts[0] not in ("vendor", "patched"):
        raise ValueError(
            "example usage: generate-patch patched/piptools some-description"
        )
    if patch_description:
        patch_fn = f"{pkg.parts[1]}-{patch_description}.patch"
    else:
        patch_fn = f"{pkg.parts[1]}.patch"
    command = "git diff {base} -p {root} > {out}".format(
        base=base,
        root=Path("pipenv").joinpath(pkg),
        out=Path(__file__).parent.joinpath("patches", pkg.parts[0], patch_fn),
    )
    with ctx.cd(str(_get_git_root(ctx))):
        log(command)
        ctx.run(command)


@invoke.task()
def update_pip_deps(ctx):
    patched_dir = _get_patched_dir(ctx)
    pip_dir = patched_dir / "pip"
    vendor_dir = pip_dir / "_vendor"
    download_licenses(ctx, vendor_dir)


@invoke.task
def download_all_licenses(ctx, include_pip=False):
    vendor_dir = _get_vendor_dir(ctx)
    patched_dir = _get_patched_dir(ctx)
    download_licenses(ctx, vendor_dir)
    download_licenses(ctx, patched_dir, "patched.txt")
    if include_pip:
        update_pip_deps(ctx)


def unpin_file(contents):
    requirements = []
    for line in contents.splitlines():
        if "==" in line:
            line, _, _ = line.strip().partition("=")
        if not line.startswith("#"):
            requirements.append(line)
    return "\n".join(sorted(requirements))


def unpin_and_copy_requirements(ctx, requirement_file, name="requirements.txt"):
    tempdir = TemporaryDirectory()
    target = Path(tempdir.name).joinpath("requirements.txt")
    contents = unpin_file(requirement_file.read_text())
    target.write_text(contents)
    env = {
        "PIPENV_IGNORE_VIRTUALENVS": "1",
        "PIPENV_NOSPIN": "1",
        "PIPENV_PYTHON": "3.6",
    }
    with ctx.cd(tempdir.name):
        ctx.run(f"pipenv install -r {target.as_posix()}", env=env, hide=True)
        result = ctx.run("pipenv lock -r", env=env, hide=True).stdout.strip()
        ctx.run("pipenv --rm", env=env, hide=True)
        result = sorted(line.strip() for line in result.splitlines()[1:])
        new_requirements = requirement_file.parent.joinpath(name)
        requirement_file.rename(requirement_file.parent.joinpath(f"{name}.bak"))
        new_requirements.write_text("\n".join(result))
    return result


@invoke.task
def update_safety(ctx):
    """This used to be a thing. It was removed by frostming.
    It was doing a whole lot of other things besides updating safety.
    """
    pass


@invoke.task
def unpin_and_update_vendored(ctx, vendor=False, patched=True):
    if vendor:
        vendor_file = _get_vendor_dir(ctx) / "vendor.txt"
        unpin_and_copy_requirements(ctx, vendor_file, name="vendor.txt")
    if patched:
        patched_file = _get_patched_dir(ctx) / "patched.txt"
        unpin_and_copy_requirements(ctx, patched_file, name="patched.txt")


@invoke.task(name=TASK_NAME)
def main(ctx, package=None, type=None):
    vendor_dir = _get_vendor_dir(ctx)
    patched_dir = _get_patched_dir(ctx)
    if type == "vendor":
        target_dirs = [vendor_dir]
    elif type == "patched":
        target_dirs = [patched_dir]
    else:
        target_dirs = [vendor_dir, patched_dir]
    if package:
        if type is None or type == "vendor":
            log(f"Using vendor dir: {vendor_dir}")
            vendor(ctx, vendor_dir, package=package)
            download_licenses(ctx, vendor_dir, package=package)
        elif type == "patched":
            log(f"Using patched dir: {patched_dir}")
            vendor(ctx, patched_dir, package=package)
            download_licenses(ctx, patched_dir, package=package)
        log(f"Vendored {package}")
        return
    for package_dir in target_dirs:
        clean_vendor(ctx, package_dir)
        if package_dir == patched_dir:
            vendor(ctx, patched_dir, rewrite=True)
        else:
            vendor(ctx, package_dir, rewrite=True)
        req_txt = "vendor.txt" if package_dir == vendor_dir else "patched.txt"
        download_licenses(ctx, package_dir, req_txt)
        if package_dir == patched_dir:
            update_pip_deps(ctx)
    log("Revendoring complete")


@invoke.task
def vendor_artifact(ctx, package, version=None):
    simple = requests.get(f"https://pypi.org/simple/{package}/")
    pkg_str = f"{package}-{version}"
    soup = bs4.BeautifulSoup(simple.content)
    links = [
        a.attrs["href"] for a in soup.find_all("a") if a.getText().startswith(pkg_str)
    ]
    for link in links:
        dest_dir = _get_git_root(ctx) / "tests" / "pypi" / package
        if not dest_dir.exists():
            dest_dir.mkdir()
        _, _, dest_path = urllib3_parse(link).path.rpartition("/")
        dest_file = dest_dir / dest_path
        with open(dest_file.as_posix(), "wb") as target_handle, open_file(link) as fp:
            if fp is None:
                print(f"Error downloading {link}")
                continue
            shutil.copyfileobj(fp, target_handle)