import argparse
import configparser
import glob
import os
import shutil
import sys
import tarfile
import tempfile
from argparse import Namespace
from subprocess import check_call
from typing import Dict, List, Optional

CYCLECLOUD_SCALELIB_VERSION = "1.0.6"
CYCLECLOUD_API_VERSION = "8.1.0"


def build_swagger() -> str:
    check_call([sys.executable, "setup.py", "swagger"])
    check_call([sys.executable, "setup.py", "sdist"], cwd="clusters")
    sdists = glob.glob(
        "clusters/dist/swagger-client-{}.tar.gz".format(CYCLECLOUD_SCALELIB_VERSION)
    )
    assert len(sdists) == 1, "Found %d sdist packages, expected 1" % len(sdists)
    path = sdists[0]
    fname = os.path.basename(path)
    dest = os.path.join("libs", fname)
    if os.path.exists(dest):
        os.remove(dest)
    shutil.move(path, dest)
    return fname


def build_sdist() -> str:
    
    cmd = [sys.executable, "setup.py", "sdist"]
    check_call(cmd)
    sdists = glob.glob(
        "dist/cyclecloud-scalelib-{}.tar.gz".format(CYCLECLOUD_SCALELIB_VERSION)
    )
    assert len(sdists) == 1, "Found %d sdist packages, expected 1" % len(sdists)
    path = sdists[0]
    fname = os.path.basename(path)
    dest = os.path.join("libs", fname)
    if os.path.exists(dest):
        os.remove(dest)
    shutil.move(path, dest)
    return fname


def get_cycle_libs(args: Namespace) -> List[str]:
    # ret = [build_swagger(), build_sdist()]
    ret = [build_sdist()]

    cyclecloud_api_file = "cyclecloud_api-{}-py2.py3-none-any.whl".format(
        CYCLECLOUD_API_VERSION
    )

    cyclecloud_api_url = "https://github.com/Azure/cyclecloud-gridengine/releases/download/2.0.0/cyclecloud_api-8.0.1-py2.py3-none-any.whl"
    to_download = {
        cyclecloud_api_file: (args.cyclecloud_api, cyclecloud_api_url),
    }

    for lib_file in to_download:
        arg_override, url = to_download[lib_file]
        if arg_override:
            if not os.path.exists(arg_override):
                print(arg_override, "does not exist", file=sys.stderr)
                sys.exit(1)
            fname = os.path.basename(arg_override)
            orig = os.path.abspath(arg_override)
            dest = os.path.abspath(os.path.join("libs", fname))
            if orig != dest:
                shutil.copyfile(orig, dest)
            ret.append(fname)
        else:
            dest = os.path.join("libs", lib_file)
            check_call(["curl", "-L", "-k", "-s", "-f", "-o", dest, url])
            ret.append(lib_file)
            print("Downloaded", lib_file, "to")

    return ret


def execute() -> None:
    expected_cwd = os.path.abspath(os.path.dirname(__file__))
    os.chdir(expected_cwd)

    if not os.path.exists("libs"):
        os.makedirs("libs")

    argument_parser = argparse.ArgumentParser(
        "Builds CycleCloud GridEngine project with all dependencies.\n"
        + "If you don't specify local copies of scalelib or cyclecloud-api they will be downloaded from github."
    )
    argument_parser.add_argument("--cyclecloud-api", default=None)
    args = argument_parser.parse_args()

    cycle_libs = get_cycle_libs(args)

    version = CYCLECLOUD_SCALELIB_VERSION

    if not os.path.exists("dist"):
        os.makedirs("dist")

    tf = tarfile.TarFile.gzopen(
        "dist/cyclecloud-scalelib-pkg-{}.tar.gz".format(version), "w"
    )

    build_dir = tempfile.mkdtemp("cyclecloud-scalelib")

    def _add(name: str, path: Optional[str] = None, mode: Optional[int] = None) -> None:
        path = path or name
        tarinfo = tarfile.TarInfo("cyclecloud-scalelib/" + name)
        tarinfo.size = os.path.getsize(path)
        tarinfo.mtime = int(os.path.getmtime(path))
        if mode:
            tarinfo.mode = mode

        with open(path, "rb") as fr:
            tf.addfile(tarinfo, fr)

    packages = []
    for dep in cycle_libs:
        dep_path = os.path.abspath(os.path.join("libs", dep))
        _add("packages/" + dep, dep_path)
        packages.append(dep_path)

    check_call(["pip3", "download"] + packages, cwd=build_dir)

    print("Using build dir", build_dir)
    by_package: Dict[str, List[str]] = {}
    for fil in os.listdir(build_dir):
        toks = fil.split("-", 1)
        package = toks[0]
        if package == "cyclecloud":
            package = "{}-{}".format(toks[0], toks[1])
        if package not in by_package:
            by_package[package] = []
        by_package[package].append(fil)

    for package, fils in by_package.items():
        assert len(fils) == 1, "Duplicate package found!: %s=%s" % (package, fils)

    for fil in os.listdir(build_dir):
        path = os.path.join(build_dir, fil)
        _add("packages/" + fil, path)

    _add(
        "install.sh",
        mode=os.stat("install.sh")[0],
    )


if __name__ == "__main__":
    execute()