from conan import ConanFile
from conan.tools.cmake import CMake, CMakeDeps, CMakeToolchain, cmake_layout
from conan.tools.env import VirtualBuildEnv


class KernelConan(ConanFile):
    name = "kernel"
    description = "The kernel of TeachOS"
    version = "0.0.1"
    package_type = "application"
    homepage = "https://gitlab.ost.ch/teachos/kernel"

    settings = [
        "arch",
        "build_type",
        "compiler",
    ]

    tool_requires = [
        "cmake/[~3.27]",
        "gcc/13.2.0@teachos/stable",
    ]

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

    def generate(self):
        build_environment = VirtualBuildEnv(self)
        build_environment.generate()

        dependencies = CMakeDeps(self)
        dependencies.generate()

        toolchain = CMakeToolchain(self)
        toolchain.cache_variables["CMAKE_TRY_COMPILE_TARGET_TYPE"] = "STATIC_LIBRARY"
        toolchain.variables["TEACHOS_DESCRIPTION"] = self.description
        toolchain.variables["TEACHOS_HOMEPAGE_URL"] = self.homepage
        toolchain.variables["TEACHOS_VERSION"] = self.version
        toolchain.blocks["teachos_cmake_modules"] = CMakeModulesPathBlock
        toolchain.blocks["teachos_cmake_modules"].values["root"] = self.source_folder
        toolchain.blocks["teachos_platform"] = PlatformIncludeBlock
        toolchain.blocks["teachos_platform"].values["platform"] = self.settings.arch
        toolchain.blocks.remove("cmake_flags_init")
        toolchain.blocks.remove("arch_flags")
        toolchain.generate()

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


class PlatformIncludeBlock:
    template = 'include("{{platform}}")'

class CMakeModulesPathBlock:
    template = 'list(APPEND CMAKE_MODULE_PATH "{{root}}/cmake/Modules" "{{root}}/cmake/Platforms")'