from conan import ConanFile
from conan.tools.files import get, copy
import os


class LibacoConanfile(ConanFile):
    name = "libaco"
    description = (
        "A blazing fast and lightweight C asymmetric coroutine library 💎 ⛅🚀⛅🌞"
    )
    license = "Apache-2.0 license"
    homepage = "https://github.com/hnes/libaco"
    settings = "os", "compiler", "build_type", "arch"
    topics = ("coroutine", "async", "c")
    options = {
        "shared": [True, False],
        "fPIC": [True, False],
        "m32": [True, False],
    }
    default_options = {
        "shared": False,
        "fPIC": True,
        "m32": False,
    }

    def source(self):
        get(self, **self.conan_data["sources"][self.version], strip_root=True)

    def requirements(self):
        pass

    def build_requirements(self):
        pass

    def generate(self):
        pass

    def build(self):
        cc = os.environ.get("CC") or {"gcc": "gcc", "clang": "clang"}.get(
            str(self.settings.compiler), "cc"
        )

        ar = os.environ.get("AR") or {"gcc": "ar", "clang": "ar"}.get(
            str(self.settings.compiler), "ar"
        )

        cflags = [
            "-c",
            "-O2",
            "-Wall",
        ]
        asflags = ["-Wa,--noexecstack"]
        if self.options.get_safe("fPIC"):
            cflags.append("-fPIC")
        if self.options.m32:
            cflags.append("-m32")
        if self.settings.build_type == "Debug":
            cflags.append("-g")

        self.run(f"{cc} {' '.join(cflags)} -o aco.o aco.c")
        self.run(f"{cc} {' '.join(cflags)} {' '.join(asflags)} -o acosw.o acosw.S")

        if self.options.shared:
            self.run(f"{cc} -shared -o libaco.so aco.o acosw.o")
        else:
            self.run(f"{ar} rcs libaco.a aco.o acosw.o")

    def package(self):
        copy(
            self,
            "aco.h",
            src=self.source_folder,
            dst=os.path.join(self.package_folder, "include"),
        )
        # 顺便把 license 拷过去
        copy(
            self,
            "LICENSE*",
            src=self.source_folder,
            dst=os.path.join(self.package_folder, "licenses"),
        )
        # 把编译好的文件拷过去
        if self.options.shared:
            copy(
                self,
                "*.so",
                src=self.build_folder,
                dst=os.path.join(self.package_folder, "lib"),
            )
        else:
            copy(
                self,
                "*.a",
                src=self.build_folder,
                dst=os.path.join(self.package_folder, "lib"),
            )

    def package_info(self):
        self.cpp_info.libs = ["aco"]

        # 提供 CMake 变量，保持 find_package 兼容
        self.cpp_info.set_property("cmake_file_name", "libaco")
        self.cpp_info.set_property("cmake_target_name", "libaco::libaco")