class ConanFile:
    pass


required_conan_version = ">=1.53.0"


class ZlibConan(ConanFile):
    name = "zlib"
    package_type = "library"
    url = "https://github.com/conan-io/conan-center-index"
    homepage = "https://zlib.net"
    license = "Zlib"
    description = (
        "A Massively Spiffy Yet Delicately Unobtrusive Compression Library "
        "(Also Free, Not to Mention Unencumbered by Patents)"
    )
    topics = ("zlib", "compression")

    settings = "os", "arch", "compiler", "build_type"
    options = {
        "shared": [True, False],
        "fPIC": [True, False],
    }
    default_options = {
        "shared": False,
        "fPIC": True,
    }

    @property
    def _is_mingw(self):
        return self.settings.os == "Windows" and self.settings.compiler == "gcc"

    def export_sources(self):
        export_conandata_patches(self)

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

    def configure(self):
        if self.options.shared:
            self.options.rm_safe("fPIC")
        self.settings.rm_safe("compiler.libcxx")
        self.settings.rm_safe("compiler.cppstd")

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

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

    def generate(self):
        tc = CMakeToolchain(self)
        tc.variables["SKIP_INSTALL_ALL"] = False
        tc.variables["SKIP_INSTALL_LIBRARIES"] = False
        tc.variables["SKIP_INSTALL_HEADERS"] = False
        tc.variables["SKIP_INSTALL_FILES"] = True
        # Correct for misuse of "${CMAKE_INSTALL_PREFIX}/" in CMakeLists.txt
        tc.variables["INSTALL_LIB_DIR"] = "lib"
        tc.variables["INSTALL_INC_DIR"] = "include"
        tc.variables["ZLIB_BUILD_EXAMPLES"] = False
        tc.generate()

    def _patch_sources(self):
        apply_conandata_patches(self)

        is_apple_clang12 = (
            self.settings.compiler == "apple-clang"
            and Version(self.settings.compiler.version) >= "12.0"
        )
        if not is_apple_clang12:
            for filename in ["zconf.h", "zconf.h.cmakein", "zconf.h.in"]:
                filepath = os.path.join(self.source_folder, filename)
                replace_in_file(
                    self,
                    filepath,
                    "#ifdef HAVE_UNISTD_H    "  # NOQA
                    "/* may be set to #if 1 by ./configure */",  # NOQA
                    "#if defined(HAVE_UNISTD_H) && (1-HAVE_UNISTD_H-1 != 0)",  # NOQA
                )
                replace_in_file(
                    self,
                    filepath,
                    "#ifdef HAVE_STDARG_H    "  # NOQA
                    "/* may be set to #if 1 by ./configure */",  # NOQA
                    "#if defined(HAVE_STDARG_H) && (1-HAVE_STDARG_H-1 != 0)",  # NOQA
                )

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

    def _extract_license(self):
        tmp = load(self, os.path.join(self.source_folder, "zlib.h"))
        license_contents = tmp[2 : tmp.find("*/", 1)]
        return license_contents

    def package(self):
        save(
            self,
            os.path.join(self.package_folder, "licenses", "LICENSE"),
            self._extract_license(),
        )
        cmake = CMake(self)
        cmake.install()

    def package_info(self):
        self.cpp_info.set_property("cmake_find_mode", "both")
        self.cpp_info.set_property("cmake_file_name", "ZLIB")
        self.cpp_info.set_property("cmake_target_name", "ZLIB::ZLIB")
        self.cpp_info.set_property("pkg_config_name", "zlib")
        if self.settings.os == "Windows" and not self._is_mingw:
            libname = "zdll" if self.options.shared else "zlib"
        else:
            libname = "z"
        self.cpp_info.libs = [libname]

        self.cpp_info.names["cmake_find_package"] = "ZLIB"
        self.cpp_info.names["cmake_find_package_multi"] = "ZLIB"
