from conan import ConanFile
from conan.tools.cmake import CMake, CMakeToolchain, cmake_layout
from conan.tools.files import copy
from conan.errors import ConanInvalidConfiguration
import os


class IgHEtherCATConan(ConanFile):
    name = "igh-ethercat"
    version = "1.5.2"
    license = "LGPL-2.1-only"
    author = "Florian Pose <fp@igh.de>"
    url = "https://gitlab.com/etherlab.org/ethercat"
    description = "IgH EtherCAT Master userspace client library"
    topics = ("ethercat", "industrial", "automation", "fieldbus", "realtime")
    settings = "os", "compiler", "build_type", "arch"
    options = {
        "shared": [True, False],
        "fPIC": [True, False],
        "max_num_devices": ["ANY"],
    }
    default_options = {
        "shared": True,
        "fPIC": True,
        "max_num_devices": 1,
    }

    exports_sources = (
        "CMakeLists.txt",
        "include/*",
        "lib/*",
        "master/globals.h",
        "master/ioctl.h",
        "globals.h",
        "COPYING",
        "COPYING.LESSER",
    )

    def validate(self):
        if self.settings.os != "Linux":
            raise ConanInvalidConfiguration("IgH EtherCAT Master is only supported on Linux")

        # Validate max_num_devices is a positive integer
        try:
            max_devices = int(self.options.max_num_devices)
            if max_devices < 1:
                raise ConanInvalidConfiguration("max_num_devices must be >= 1")
        except ValueError:
            raise ConanInvalidConfiguration("max_num_devices must be an integer")

    def config_options(self):
        if self.settings.os == "Windows":
            del self.options.fPIC

    def configure(self):
        # This is a C library
        self.settings.rm_safe("compiler.libcxx")
        self.settings.rm_safe("compiler.cppstd")

    def requirements(self):
        self.build_requires("cmake/[>=3.15]")

    def layout(self):
        cmake_layout(self, src_folder=".")

    def generate(self):
        tc = CMakeToolchain(self)
        tc.variables["BUILD_SHARED_LIBS"] = self.options.shared
        tc.variables["EC_MAX_NUM_DEVICES"] = str(self.options.max_num_devices)
        tc.generate()

    def build(self):
        cmake = CMake(self)
        cmake.configure()
        cmake.build()

    def package(self):
        copy(
            self,
            "COPYING.LESSER",
            src=self.source_folder,
            dst=os.path.join(self.package_folder, "licenses"),
        )
        copy(
            self,
            "COPYING",
            src=self.source_folder,
            dst=os.path.join(self.package_folder, "licenses"),
        )
        cmake = CMake(self)
        cmake.install()

    def package_info(self):
        self.cpp_info.libs = ["ethercat"]
        self.cpp_info.set_property("cmake_file_name", "ethercat")
        self.cpp_info.set_property("cmake_target_name", "EtherLab::ethercat")
        self.cpp_info.set_property("pkg_config_name", "libethercat")
        if self.settings.os == "Linux":
            self.cpp_info.system_libs = ["rt", "pthread"]