from conans import ConanFile, CMake, tools
import os

def version_to_date(ver):
    return ver[0:4] + "-" + ver[4:6] + "-" + ver[6:8]

class Re2Conan(ConanFile):
    name = "re2"
    description = "Fast, safe, thread-friendly regular expression library"
    topics = ("conan", "re2", "regex")
    url = "https://github.com/conan-io/conan-center-index"
    homepage = "https://github.com/google/re2"
    license = "BSD-3-Clause"

    exports_sources = ["CMakeLists.txt"]
    generators = "cmake"

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

    _cmake = None

    @property
    def _source_subfolder(self):
        return "source_subfolder"

    @property
    def _build_subfolder(self):
        return "build_subfolder"

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

    def configure(self):
        if self.options.shared:
            del self.options.fPIC
        if self.settings.compiler.cppstd:
            tools.check_min_cppstd(self, 11)

    def source(self):
        tools.get(**self.conan_data["sources"][self.version])
        os.rename("re2-" + version_to_date(self.version), self._source_subfolder)

    def _configure_cmake(self):
        if self._cmake:
            return self._cmake
        self._cmake = CMake(self)
        self._cmake.definitions["RE2_BUILD_TESTING"] = False
        self._cmake.configure(build_folder=self._build_subfolder)
        return self._cmake

    def build(self):
        cmake = self._configure_cmake()
        cmake.build()

    def package(self):
        self.copy("LICENSE", src=self._source_subfolder, dst="licenses", keep_path=False)
        cmake = self._configure_cmake()
        cmake.install()
        tools.rmdir(os.path.join(self.package_folder, "lib", "cmake"))

    def package_info(self):
        self.cpp_info.names["cmake_find_package"] = "re2"
        self.cpp_info.names["cmake_find_package_multi"] = "re2"
        self.cpp_info.libs = tools.collect_libs(self)

        if self.settings.os == "Linux":
            self.cpp_info.system_libs = ["m", "pthread"]
