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from conans import ConanFile, tools, CMake
import os


class QtConanError(Exception):
    pass


class QtVirtualKeyboard(ConanFile):
    name = "qtvirtualkeyboard"
    version = "6.1.0"
    license = "GPL-3.0+, Commercial Qt License Agreement"
    author = "The Qt Company <https://www.qt.io/contact-us>"
    url = "https://code.qt.io/cgit/qt/qtvirtualkeyboard.git/"
    description = (
        "The Qt Virtual Keyboard project provides an input framework and "
        "reference keyboard frontend for Qt on Linux Desktop/X11, "
        "Windows Desktop, and Boot2Qt targets."
    )
    topics = ("qt", "qt6", "input", "keyboard")
    settings = "os", "compiler", "build_type", "arch"
    options = {
        "shared": [True, False, "default"],
        "qt6": "ANY",
    }  # "qt6" is needed to model unique package_id for the Add-on build per used Qt6 version
    default_options = {
        "shared": "default",  # default: Use the value of the Qt build
        "qt6": None,
    }
    exports_sources = "*", "!conan*.*"
    revision_mode = "scm"  # use commit ID as the RREV (recipe revision)

    def source(self):
        # sources are installed next to recipe, no need to clone etc. sources here
        pass

    def _get_cmake_prefix_path(self):
        # 'QTDIR' provided as env variable in profile file which is part
        # of the Qt essential binary package(s)
        cmake_prefix_path = os.environ.get("QTDIR")
        if not cmake_prefix_path:
            raise QtConanError("'QTDIR' not defined! The 'QTDIR' needs to point to "
                               "Qt installation directory.")
        print(f"CMAKE_PREFIX_PATH for '{self.name}/{self.version}' build is: "
              f"{cmake_prefix_path}")
        return cmake_prefix_path

    def _read_env(self, key):
        value = os.environ.get(key)
        if not value:
            raise QtConanError(f"{self.settings.os} build specified but '{key}' "
                               "was not defined?")
        return value

    def _get_qtcmake(self):
        qt_install_path = self._get_cmake_prefix_path()
        ext = ".bat" if tools.os_info.is_windows else ""
        qtcmake = os.path.abspath(os.path.join(qt_install_path, "bin", "qt-cmake" + ext))
        if not os.path.exists(qtcmake):
            raise QtConanError(f"Unable to locate {qtcmake} from 'QTDIR': {qt_install_path}")
        return qtcmake

    def _get_cmake_tool(self):
        cmake = CMake(self, cmake_program=self._get_qtcmake())
        cmake.verbose = True

        # Qt modules need to be 'installed'.
        # We need to direct the 'make install' to some directory under Conan cache,
        # place it under the current build directory which is also under the Conan cache.
        # Note, the actual 'make install' is called in "package()".
        install_dir = os.path.join(os.getcwd(), "_install_tmp")
        cmake.definitions["CMAKE_INSTALL_PREFIX"] = install_dir

        # Use the value of the Qt build
        if self.options.shared.value == "default":
            del cmake.definitions["BUILD_SHARED_LIBS"]

        cmake_toolchain_file = os.environ.get("CMAKE_TOOLCHAIN_FILE")
        if cmake_toolchain_file:
            cmake.definitions["CMAKE_TOOLCHAIN_FILE"] = cmake_toolchain_file

        if self.settings.os == "Android":
            cmake.definitions["ANDROID_SDK_ROOT"] = self._read_env("ANDROID_SDK_ROOT")
            cmake.definitions["ANDROID_NDK_ROOT"] = self._read_env("ANDROID_NDK_ROOT")

        if self.settings.os == "iOS":
            # Instead of Conan's auto-added 'Darwin', explicitly pass 'iOS'.
            cmake.definitions["CMAKE_SYSTEM_NAME"] = "iOS"

            # Remove the explicit sysroot, let CMake detect the sysroots, to ensure
            # that multi-arch builds work.
            del cmake.definitions["CMAKE_OSX_SYSROOT"]

            # Remove the conan provided architecture, instead rely on the architectures set
            # by the Qt toolchain file, which with official Qt packages most likely means
            # multi-arch iOS.
            del cmake.definitions["CMAKE_OSX_ARCHITECTURES"]

        return cmake

    def build(self):
        cmake = self._get_cmake_tool()
        self.run(f"{self._get_qtcmake()} '{self.source_folder}' {cmake.command_line}")
        self.run(f"cmake --build . {cmake.build_config}")

    def package(self):
        #  see "CMAKE_INSTALL_PREFIX" above
        install_dir = os.path.join(os.getcwd(), "_install_tmp")
        self.run("cmake --build . --target install")
        self.copy("*", src=install_dir, dst=".")

    def package_info(self):
        # used for the actual library filename, Ordered list with the library names
        self.cpp_info.libs = ["Qt6VirtualKeyboard"]

    def deploy(self):
        self.copy("*")  # copy from current package
        self.copy_deps("*")  # copy from dependencies
