# Copyright (c) 2014-present PlatformIO <contact@platformio.org>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import os
import subprocess
import sys
from os.path import dirname, isdir, join

from platformio import __version__, exception, util
from platformio.managers.package import PackageManager

CORE_PACKAGES = {
    "contrib-piohome": ">=0.5.3,<2",
    "contrib-pysite": ">=0.1.0,<2",
    "tool-pioplus": ">=0.12.1,<2",
    "tool-unity": "~1.20302.1",
    "tool-scons": "~3.20501.2"
}

PIOPLUS_AUTO_UPDATES_MAX = 100

# pylint: disable=arguments-differ


class CorePackageManager(PackageManager):

    CORE_PACKAGES_DIR = join(util.get_home_dir(), "packages")

    def __init__(self):
        PackageManager.__init__(self, CorePackageManager.CORE_PACKAGES_DIR, [
            "https://dl.bintray.com/platformio/dl-packages/manifest.json",
            "http%s://dl.platformio.org/packages/manifest.json" %
            ("" if sys.version_info < (2, 7, 9) else "s")
        ])

    def install(  # pylint: disable=keyword-arg-before-vararg
            self,
            name,
            requirements=None,
            *args,
            **kwargs):
        PackageManager.install(self, name, requirements, *args, **kwargs)
        self.cleanup_packages()
        return self.get_package_dir(name, requirements)

    def update(self, *args, **kwargs):
        result = PackageManager.update(self, *args, **kwargs)
        self.cleanup_packages()
        return result

    def cleanup_packages(self):
        self.cache_reset()
        best_pkg_versions = {}
        for name, requirements in CORE_PACKAGES.items():
            pkg_dir = self.get_package_dir(name, requirements)
            if not pkg_dir:
                continue
            best_pkg_versions[name] = self.load_manifest(pkg_dir)['version']
        for manifest in self.get_installed():
            if manifest['name'] not in best_pkg_versions:
                continue
            if manifest['version'] != best_pkg_versions[manifest['name']]:
                self.uninstall(manifest['__pkg_dir'], trigger_event=False)
        self.cache_reset()
        return True


def get_core_package_dir(name):
    assert name in CORE_PACKAGES
    requirements = CORE_PACKAGES[name]
    pm = CorePackageManager()
    pkg_dir = pm.get_package_dir(name, requirements)
    if pkg_dir:
        return pkg_dir
    return pm.install(name, requirements)


def update_core_packages(only_check=False, silent=False):
    if not isdir(CorePackageManager.CORE_PACKAGES_DIR):
        return None
    pm = CorePackageManager()
    for name, requirements in CORE_PACKAGES.items():
        pkg_dir = pm.get_package_dir(name)
        if not pkg_dir:
            continue
        if not silent or pm.outdated(pkg_dir, requirements):
            pm.update(name, requirements, only_check=only_check)
    return True


def pioplus_call(args, **kwargs):
    if "windows" in util.get_systype() and sys.version_info < (2, 7, 6):
        raise exception.PlatformioException(
            "PlatformIO Core Plus v%s does not run under Python version %s.\n"
            "Minimum supported version is 2.7.6, please upgrade Python.\n"
            "Python 3 is not yet supported.\n" % (__version__,
                                                  sys.version.split()[0]))

    pioplus_path = join(get_core_package_dir("tool-pioplus"), "pioplus")
    pythonexe_path = util.get_pythonexe_path()
    os.environ['PYTHONEXEPATH'] = pythonexe_path
    os.environ['PYTHONPYSITEDIR'] = get_core_package_dir("contrib-pysite")
    os.environ['PATH'] = (os.pathsep).join(
        [dirname(pythonexe_path), os.environ['PATH']])
    util.copy_pythonpath_to_osenv()
    code = subprocess.call([pioplus_path] + args, **kwargs)

    # handle remote update request
    if code == 13:
        count_attr = "_update_count"
        try:
            count_value = getattr(pioplus_call, count_attr)
        except AttributeError:
            count_value = 0
            setattr(pioplus_call, count_attr, 1)
        count_value += 1
        setattr(pioplus_call, count_attr, count_value)
        if count_value < PIOPLUS_AUTO_UPDATES_MAX:
            update_core_packages()
            return pioplus_call(args, **kwargs)

    # handle reload request
    elif code == 14:
        return pioplus_call(args, **kwargs)

    if code != 0:
        raise exception.ReturnErrorCode(1)

    return True