# Copyright (C) 2018 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

from setuptools import Command

import sys
import logging
from pathlib import Path

from .log import log, LogLevel
from .qtinfo import QtInfo
from .utils import memoize, which

_AVAILABLE_MKSPECS = ["ninja", "msvc", "mingw"] if sys.platform == "win32" else ["ninja", "make"]


# Global options not which are not part of the commands
ADDITIONAL_OPTIONS = """
Additional options:
  --limited-api                        Use Limited API [yes/no]
  --macos-use-libc++                   Use libc++ on macOS
  --snapshot-build                     Snapshot build
  --package-timestamp                  Package Timestamp
  --cmake-toolchain-file               Path to CMake toolchain to enable cross-compiling
  --shiboken-host-path                 Path to host shiboken package when cross-compiling
  --qt-host-path                       Path to host Qt installation when cross-compiling
"""


def _warn_multiple_option(option):
    log.warning(f'Option "{option}" occurs multiple times on the command line.')


def _warn_deprecated_option(option, replacement=None):
    w = f'Option "{option}" is deprecated and may be removed in a future release.'
    if replacement:
        w = f'{w}\nUse "{replacement}" instead.'
    log.warning(w)


class Options(object):
    def __init__(self):

        # Dictionary containing values of all the possible options.
        self.dict = {}

    def has_option(self, name, remove=True):
        """ Returns True if argument '--name' was passed on the command
        line. """
        option = f"--{name}"
        count = sys.argv.count(option)
        remove_count = count
        if not remove and count > 0:
            remove_count -= 1
        for _ in range(remove_count):
            sys.argv.remove(option)
        if count > 1:
            _warn_multiple_option(option)
        return count > 0

    def option_value(self, name, short_option_name=None, remove=True):
        """
        Returns the value of a command line option.

        :param name: The name of the command line option.

        :param remove: Whether the option and its value should be
         removed from sys.argv. Useful when there's a need to query for
         the value and also pass it along to setuptools for example.

        :return: Either the option value or None.
        """

        option = f"--{name}"
        short_option = f"-{short_option_name}" if short_option_name else None
        single_option_prefix = f"{option}="
        value = None
        for index in reversed(range(len(sys.argv))):
            arg = sys.argv[index]
            if arg == option or short_option and arg == short_option:
                if value:
                    _warn_multiple_option(option)
                else:
                    if index + 1 >= len(sys.argv):
                        raise RuntimeError(f"The option {option} requires a value")
                    value = sys.argv[index + 1]

                if remove:
                    sys.argv[index:index + 2] = []

            elif arg.startswith(single_option_prefix):
                if value:
                    _warn_multiple_option(option)
                else:
                    value = arg[len(single_option_prefix):]

                if remove:
                    sys.argv[index:index + 1] = []

        self.dict[name] = value
        return value


options = Options()


def has_option(*args, **kwargs):
    return options.has_option(*args, **kwargs)


def option_value(*args, **kwargs):
    return options.option_value(*args, **kwargs)


def _jobs_option_value():
    """Option value for parallel builds."""
    value = option_value('parallel', short_option_name='j')
    if value:
        return f"-j{value}" if not value.startswith('-j') else value
    return ''


def find_qtpaths():
    # for these command --qtpaths should not be required
    no_qtpaths_commands = ["--help", "--help-commands", "--qt-target-path", "build_rst_docs"]

    for no_qtpaths_command in no_qtpaths_commands:
        if any(no_qtpaths_command in argument for argument in sys.argv):
            return None

    qtpaths = option_value("qtpaths")
    if qtpaths:
        return qtpaths

    # if qtpaths is not given as cli option, try to find it in PATH
    qtpaths = which("qtpaths6")
    if qtpaths:
        return str(qtpaths.resolve())

    qtpaths = which("qtpaths")
    if qtpaths:
        return str(qtpaths.resolve())

    return qtpaths


# Declare options which need to be known when instantiating the setuptools
# commands or even earlier during SetupRunner.run().
OPTION = {
    "BUILD_TYPE": option_value("build-type"),
    "INTERNAL_BUILD_TYPE": option_value("internal-build-type"),
    # number of parallel build jobs
    "JOBS": _jobs_option_value(),
    # Legacy, not used any more.
    "JOM": has_option('jom'),
    "MACOS_USE_LIBCPP": has_option("macos-use-libc++"),
    "LOG_LEVEL": option_value("log-level", remove=False),
    "QUIET": has_option('quiet'),
    "VERBOSE_BUILD": has_option('verbose-build'),
    "SNAPSHOT_BUILD": has_option("snapshot-build"),
    "LIMITED_API": option_value("limited-api"),
    "PACKAGE_TIMESTAMP": option_value("package-timestamp"),
    # This is used automatically by setuptools.command.install object, to
    # specify the final installation location.
    "FINAL_INSTALL_PREFIX": option_value("prefix", remove=False),
    "CMAKE_TOOLCHAIN_FILE": option_value("cmake-toolchain-file"),
    "SHIBOKEN_HOST_PATH": option_value("shiboken-host-path"),
    "SHIBOKEN_HOST_PATH_QUERY_FILE": option_value("internal-shiboken-host-path-query-file"),
    "QT_HOST_PATH": option_value("qt-host-path"),
    # This is used to identify the template for doc builds
    "QTPATHS": find_qtpaths()
    # This is an optional command line option. If --qtpaths is not provided via command-line,
    # then qtpaths is checked inside PATH variable
}

_deprecated_option_jobs = option_value('jobs')
if _deprecated_option_jobs:
    _warn_deprecated_option('jobs', 'parallel')
    OPTION["JOBS"] = _deprecated_option_jobs


class CommandMixin(object):
    """Mixin for the setuptools build/install commands handling the options."""

    _static_class_finalized_once = False

    mixin_user_options = [
        ('avoid-protected-hack', None, 'Force --avoid-protected-hack'),
        ('debug', None, 'Build with debug information'),
        ('relwithdebinfo', None, 'Build in release mode with debug information'),
        ('only-package', None, 'Package only'),
        ('no-strip', None, 'Do not strip package libraries (release mode)'),
        ('standalone', None, 'Standalone build'),
        ('ignore-git', None, 'Do update subrepositories'),
        ('skip-docs', None, 'Skip documentation build (deprecated)'),
        ('build-docs', None, 'Build the API documentation'),
        ('no-jom', None, 'Do not use jom (MSVC)'),
        ('build-tests', None, 'Build tests'),
        ('use-xvfb', None, 'Use Xvfb for testing'),
        ('reuse-build', None, 'Reuse existing build'),
        ('compiler-launcher=', None, 'Use a compiler launcher like ccache or sccache for builds'),
        ('skip-cmake', None, 'Skip CMake step'),
        ('skip-make-install', None, 'Skip install step'),
        ('skip-packaging', None, 'Skip packaging step'),
        ('log-level=', None, 'Log level of the build.'),
        ('verbose-build', None, 'Verbose build'),
        ('quiet', None, 'Quiet build'),
        ('sanitize-address', None, 'Build with address sanitizer'),
        ('shorter-paths', None, 'Use shorter paths'),
        ('doc-build-online', None, 'Build online documentation'),
        ('qtpaths=', None, 'Path to qtpaths'),
        ('qmake=', None, 'Path to qmake (deprecated, use qtpaths)'),
        ('qt=', None, 'Qt version'),
        ('qt-target-path=', None,
         'Path to device Qt installation (use Qt libs when cross-compiling)'),
        ('cmake=', None, 'Path to CMake'),
        ('openssl=', None, 'Path to OpenSSL libraries'),

        # FIXME: Deprecated in favor of shiboken-target-path
        ('shiboken-config-dir=', None, 'shiboken configuration directory'),

        ('shiboken-target-path=', None, 'Path to target shiboken package'),
        ('python-target-path=', None, 'Path to target Python installation / prefix'),
        ('make-spec=', None, 'Qt make-spec'),
        ('macos-arch=', None, 'macOS architecture'),
        ('macos-sysroot=', None, 'macOS sysroot'),
        ('macos-deployment-target=', None, 'macOS deployment target'),
        ('skip-modules=', None, 'Qt modules to be skipped'),
        ('module-subset=', None, 'Qt modules to be built'),
        ('rpath=', None, 'RPATH'),
        ('qt-conf-prefix=', None, 'Qt configuration prefix'),
        ('qt-src-dir=', None, 'Qt source directory'),
        ('no-qt-tools', None, 'Do not copy the Qt tools'),
        ('no-size-optimization', None, 'Turn off size optimization for PySide6 binaries'),
        # Default is auto-detected by PysideBuild._enable_numpy()
        ('pyside-numpy-support', None, 'libpyside: Add numpy support (deprecated)'),
        ('enable-numpy-support', None, 'Enable numpy support'),
        ('disable-numpy-support', None, 'Disable numpy support'),
        ('internal-cmake-install-dir-query-file-path=', None,
         'Path to file where the CMake install path of the project will be saved'),

        # We redeclare plat-name as an option so it's recognized by the
        # install command and doesn't throw an error.
        ('plat-name=', None, 'The platform name for which we are cross-compiling'),
        ('unity', None, 'Use CMake UNITY_BUILD_MODE'),
        ('unity-build-batch-size=', None, 'Value of CMAKE_UNITY_BUILD_BATCH_SIZE')
    ]

    def __init__(self):
        self.avoid_protected_hack = False
        self.debug = False
        self.relwithdebinfo = False
        self.no_strip = False
        self.only_package = False
        self.standalone = False
        self.ignore_git = False
        self.skip_docs = False
        self.build_docs = False
        self.no_jom = False
        self.build_tests = False
        self.use_xvfb = False
        self.reuse_build = False
        self.compiler_launcher = None
        self.skip_cmake = False
        self.skip_make_install = False
        self.skip_packaging = False
        self.log_level = "info"
        self.verbose_build = False
        self.sanitize_address = False
        self.snapshot_build = False
        self.shorter_paths = False
        self.doc_build_online = False
        self.qtpaths = None
        self.qmake = None
        self.has_qmake_option = False
        self.qt = '5'
        self.qt_host_path = None
        self.qt_target_path = None
        self.cmake = None
        self.openssl = None
        self.shiboken_config_dir = None
        self.shiboken_host_path = None
        self.shiboken_host_path_query_file = None
        self.shiboken_target_path = None
        self.python_target_path = None
        self.is_cross_compile = False
        self.cmake_toolchain_file = None
        self.make_spec = None
        self.macos_arch = None
        self.macos_sysroot = None
        self.macos_deployment_target = None
        self.skip_modules = None
        self.module_subset = None
        self.rpath = None
        self.qt_conf_prefix = None
        self.qt_src_dir = None
        self.no_qt_tools = False
        self.no_size_optimization = False
        self.pyside_numpy_support = False
        self.enable_numpy_support = False
        self.disable_numpy_support = False
        self.plat_name = None
        self.internal_cmake_install_dir_query_file_path = None
        self._per_command_mixin_options_finalized = False
        self.unity = False
        self.unity_build_batch_size = "16"

        # When initializing a command other than the main one (so the
        # first one), we need to copy the user options from the main
        # command to the new command options dict. Then
        # Distribution.get_command_obj will pick up the copied options
        # ensuring that all commands that inherit from
        # the mixin, get our custom properties set by the time
        # finalize_options is called.
        if CommandMixin._static_class_finalized_once:
            current_command: Command = self
            dist = current_command.distribution
            main_command_name = dist.commands[0]
            main_command_opts = dist.get_option_dict(main_command_name)
            current_command_name = current_command.get_command_name()
            current_command_opts = dist.get_option_dict(current_command_name)
            mixin_options_set = self.get_mixin_options_set()
            for key, value in main_command_opts.items():
                if key not in current_command_opts and key in mixin_options_set:
                    current_command_opts[key] = value

        # qtpaths is already known before running SetupRunner
        self.qtpaths = OPTION["QTPATHS"]

    @staticmethod
    @memoize
    def get_mixin_options_set():
        keys = set()
        for (name, _, _) in CommandMixin.mixin_user_options:
            keys.add(name.rstrip("=").replace("-", "_"))
        return keys

    def mixin_finalize_options(self):
        # The very first we finalize options, record that.
        if not CommandMixin._static_class_finalized_once:
            CommandMixin._static_class_finalized_once = True

        # Ensure we finalize once per command object, rather than per
        # setup.py invocation. We want to have the option values
        # available in all commands that derive from the mixin.
        if not self._per_command_mixin_options_finalized:
            self._per_command_mixin_options_finalized = True
            self._do_finalize()

    def _do_finalize(self):
        # is_cross_compile must be set before checking for qtpaths/qmake
        # because we DON'T want those to be found when cross compiling.
        # Currently when cross compiling, qt-target-path MUST be used.
        using_cmake_toolchain_file = False
        cmake_toolchain_file = None
        if OPTION["CMAKE_TOOLCHAIN_FILE"]:
            self.is_cross_compile = True
            using_cmake_toolchain_file = True
            cmake_toolchain_file = OPTION["CMAKE_TOOLCHAIN_FILE"]
            self.cmake_toolchain_file = cmake_toolchain_file

        if not self._determine_defaults_and_check():
            sys.exit(-1)
        OPTION['AVOID_PROTECTED_HACK'] = self.avoid_protected_hack
        OPTION['DEBUG'] = self.debug
        OPTION['RELWITHDEBINFO'] = self.relwithdebinfo
        OPTION['NO_STRIP'] = self.no_strip
        OPTION['ONLYPACKAGE'] = self.only_package
        OPTION['STANDALONE'] = self.standalone
        OPTION['IGNOREGIT'] = self.ignore_git
        OPTION['SKIP_DOCS'] = self.skip_docs
        OPTION['BUILD_DOCS'] = self.build_docs
        OPTION['BUILDTESTS'] = self.build_tests

        OPTION['NO_JOM'] = self.no_jom
        OPTION['XVFB'] = self.use_xvfb
        OPTION['REUSE_BUILD'] = self.reuse_build
        OPTION['COMPILER_LAUNCHER'] = self.compiler_launcher
        OPTION['SKIP_CMAKE'] = self.skip_cmake
        OPTION['SKIP_MAKE_INSTALL'] = self.skip_make_install
        OPTION['SKIP_PACKAGING'] = self.skip_packaging
        # Logging options:
        # 'quiet' and 'verbose-build' are deprecated,
        # log-level has higher priority when used.
        OPTION['LOG_LEVEL'] = self.log_level
        OPTION['VERBOSE_BUILD'] = self.verbose_build
        # The OPTION["QUIET"] doesn't need to be initialized with a value
        # because is an argument that it will not be removed due to being
        # a setuptools argument as well.

        # By default they are False, so we check if they changed with xor
        if bool(OPTION["QUIET"]) != bool(OPTION["VERBOSE_BUILD"]):
            log.warn("Using --quiet and --verbose-build is deprecated. "
                     "Please use --log-level=quiet or --log-level=verbose instead.")
            # We assign a string value instead of the enum
            # because is what we get from the command line.
            # Later we assign the enum
            if OPTION["QUIET"]:
                OPTION["LOG_LEVEL"] = "quiet"
            elif OPTION["VERBOSE_BUILD"]:
                OPTION["LOG_LEVEL"] = "verbose"

        if OPTION["LOG_LEVEL"] not in ("quiet", "info", "verbose"):
            log.error(f"Invalid value for log level: '--log-level={OPTION['LOG_LEVEL']}'. "
                      "Use 'quiet', 'info', or 'verbose'.")
            sys.exit(-1)
        else:
            if OPTION["LOG_LEVEL"] == "quiet":
                OPTION["LOG_LEVEL"] = LogLevel.QUIET
                log.setLevel(logging.ERROR)
            elif OPTION["LOG_LEVEL"] == "info":
                OPTION["LOG_LEVEL"] = LogLevel.INFO
                log.setLevel(logging.INFO)
            elif OPTION["LOG_LEVEL"] == "verbose":
                OPTION["LOG_LEVEL"] = LogLevel.VERBOSE
                log.setLevel(logging.DEBUG)

        OPTION['SANITIZE_ADDRESS'] = self.sanitize_address
        OPTION['SHORTER_PATHS'] = self.shorter_paths
        OPTION['DOC_BUILD_ONLINE'] = self.doc_build_online
        OPTION['UNITY'] = self.unity
        OPTION['UNITY_BUILD_BATCH_SIZE'] = self.unity_build_batch_size

        qtpaths_abs_path = None
        if self.qtpaths and Path(self.qtpaths).exists():
            qtpaths_abs_path = Path(self.qtpaths).resolve()

        # FIXME PYSIDE7: Remove qmake handling
        # make qtinfo.py independent of relative paths.
        qmake_abs_path = None
        if self.qmake:
            qmake_abs_path = Path(self.qmake).resolve()
            OPTION['QMAKE'] = qmake_abs_path
        OPTION['HAS_QMAKE_OPTION'] = self.has_qmake_option
        OPTION['QT_VERSION'] = self.qt
        self.qt_host_path = OPTION['QT_HOST_PATH']
        OPTION['QT_TARGET_PATH'] = self.qt_target_path

        qt_target_path = self.qt_target_path

        # We use the CMake project to find host Qt if neither qmake or
        # qtpaths is available. This happens when building the host
        # tools in the overall cross-building process.
        use_cmake = False
        if (using_cmake_toolchain_file or
                (not self.qmake and not self.qtpaths and self.qt_target_path)):
            use_cmake = True

        QtInfo().setup(qtpaths_abs_path, self.cmake, qmake_abs_path,
                       self.has_qmake_option,
                       use_cmake=use_cmake,
                       qt_target_path=qt_target_path,
                       cmake_toolchain_file=cmake_toolchain_file)

        if 'build_rst_docs' not in sys.argv:
            try:
                QtInfo().prefix_dir
            except Exception as e:
                if not self.qt_target_path:
                    log.error(
                        "\nCould not find Qt. You can pass the --qt-target-path=<qt-dir> option "
                        "as a hint where to find Qt. Error was:\n\n\n")
                else:
                    log.error(
                        f"\nCould not find Qt via provided option --qt-target-path={qt_target_path}"
                        "Error was:\n\n\n")
                raise e

        OPTION['CMAKE'] = self.cmake.resolve()
        OPTION['OPENSSL'] = self.openssl
        OPTION['SHIBOKEN_CONFIG_DIR'] = self.shiboken_config_dir
        if self.shiboken_config_dir:
            _warn_deprecated_option('shiboken-config-dir', 'shiboken-target-path')

        self.shiboken_host_path = OPTION['SHIBOKEN_HOST_PATH']
        self.shiboken_host_path_query_file = OPTION['SHIBOKEN_HOST_PATH_QUERY_FILE']

        if not self.shiboken_host_path and self.shiboken_host_path_query_file:
            try:
                queried_shiboken_host_path = Path(self.shiboken_host_path_query_file).read_text()
                self.shiboken_host_path = queried_shiboken_host_path
                OPTION['SHIBOKEN_HOST_PATH'] = queried_shiboken_host_path
            except Exception as e:
                log.error(
                    f"\n Could not find shiboken host tools via the query file: "
                    f"{self.shiboken_host_path_query_file:} Error was:\n\n\n")
                raise e

        OPTION['SHIBOKEN_TARGET_PATH'] = self.shiboken_target_path
        OPTION['PYTHON_TARGET_PATH'] = self.python_target_path
        OPTION['MAKESPEC'] = self.make_spec
        OPTION['MACOS_ARCH'] = self.macos_arch
        OPTION['MACOS_SYSROOT'] = self.macos_sysroot
        OPTION['MACOS_DEPLOYMENT_TARGET'] = self.macos_deployment_target
        OPTION['SKIP_MODULES'] = self.skip_modules
        OPTION['MODULE_SUBSET'] = self.module_subset
        OPTION['RPATH_VALUES'] = self.rpath
        OPTION['QT_CONF_PREFIX'] = self.qt_conf_prefix
        OPTION['QT_SRC'] = self.qt_src_dir
        OPTION['NO_QT_TOOLS'] = self.no_qt_tools
        OPTION['NO_OVERRIDE_OPTIMIZATION_FLAGS'] = self.no_size_optimization
        OPTION['DISABLE_NUMPY_SUPPORT'] = self.disable_numpy_support
        OPTION['ENABLE_NUMPY_SUPPORT'] = self.enable_numpy_support
        OPTION['PYSIDE_NUMPY_SUPPORT'] = self.pyside_numpy_support

        if not self._extra_checks():
            sys.exit(-1)

        OPTION['PLAT_NAME'] = self.plat_name

    def _extra_checks(self):
        if self.is_cross_compile and not self.plat_name:
            log.error("No value provided to --plat-name while cross-compiling.")
            return False
        return True

    def _determine_defaults_and_check(self):
        if not self.cmake:
            self.cmake = Path(which("cmake"))
        elif isinstance(self.cmake, str):  # command line option
            self.cmake = Path(self.cmake)
        if not self.cmake:
            log.error("cmake could not be found.")
            return False
        if not self.cmake.exists():
            log.error(f"'{self.cmake}' does not exist.")
            return False

        # Setting up the Paths when passing via command line
        if isinstance(self.qtpaths, str):
            self.qtpaths = Path(self.qtpaths)
        if isinstance(self.qmake, str):
            self.qmake = Path(self.qmake)
        if self.qt_target_path and isinstance(self.qt_target_path, str):
            self.qt_target_path = Path(self.qt_target_path)

        # When cross-compiling, we only accept the qt-target-path
        # option and don't rely on auto-searching in PATH or the other
        # qtpaths / qmake options.
        # We also don't do auto-searching if qt-target-path is passed
        # explicitly. This is to help with the building of host tools
        # while cross-compiling.
        # Skip this process for the 'build_rst_docs' command
        if not self.is_cross_compile and not self.qt_target_path and 'build_rst_docs' not in sys.argv:
            # Enforce usage of qmake in QtInfo if it was given explicitly.
            if self.qmake:
                self.has_qmake_option = True
                _warn_deprecated_option('qmake', 'qtpaths')

            # If no tool was specified and qtpaths was not found in PATH,
            # ask to provide a path to qtpaths.
            if not self.qtpaths and not self.qmake and not self.qt_target_path:
                log.error("No value provided to --qtpaths option. Please provide one to find Qt.")
                return False

            # Validate that the given tool path exists.
            if self.qtpaths and not self.qtpaths.exists():
                log.error(f"The specified qtpaths path '{self.qtpaths}' does not exist.")
                return False

            if self.qmake and not self.qmake.exists():
                log.error(f"The specified qmake path '{self.qmake}' does not exist.")
                return False
        else:
            # Check for existence, but don't require if it's not set. A
            # check later will be done to see if it's needed.
            if self.qt_target_path and not self.qt_target_path.exists():
                log.error(f"Provided --qt-target-path='{self.qt_target_path}' "
                          "path does not exist.")
                return False

        if not self.make_spec:
            self.make_spec = _AVAILABLE_MKSPECS[0]
        if self.make_spec not in _AVAILABLE_MKSPECS:
            log.error(f'Invalid option --make-spec "{self.make_spec}". '
                      f'Available values are {_AVAILABLE_MKSPECS}')
            return False

        if OPTION["JOBS"] and sys.platform == 'win32' and self.no_jom:
            log.error("Option --jobs can only be used with jom on Windows.")
            return False

        if sys.platform == 'win32' and OPTION["LIMITED_API"] == "yes" and self.debug:
            log.error("It is not possible to make a debug build of PySide6 with limited API. "
                      "Please select a release build or disable limited API.")
            return False

        return True
