from pathlib import Path
from .base import ConfigInfo

from kiwixbuild._global import get_target_step


class WasmConfigInfo(ConfigInfo):
    name = "wasm"
    static = True
    build = "wasm"
    arch_full = "wasm64-emscripten"
    libdir = "lib"
    # arch_full = 'wasm64-linux'
    toolchain_names = ["emsdk"]
    compatible_hosts = ["fedora", "debian"]
    exe_wrapper_def = ""

    def get_cross_config(self):
        return {
            "binaries": self.binaries,
            "exe_wrapper_def": "",
            "root_path": self.root_path,
            "extra_libs": [],
            "extra_cflags": [],
            "host_machine": {
                "system": "emscripten",
                "lsystem": "emscripten",
                "cpu_family": "wasm64",
                "cpu": "wasm64",
                "endian": "little",
                "abi": "",
            },
        }

    @property
    def wasm_sdk(self):
        return get_target_step("emsdk", self.name)

    @property
    def install_path(self) -> Path:
        return self.wasm_sdk.install_path

    @property
    def root_path(self) -> Path:
        return self.install_path

    @property
    def binaries(self):
        binaries = (
            ("CC", "emcc"),
            ("CXX", "em++"),
            ("AR", "emar"),
            ("STRIP", "emstrip"),
            ("WINDRES", "windres"),
            ("RANLIB", "emranlib"),
            ("LD", "wasm-ld"),
        )
        binaries = {
            k: self.install_path / "upstream" / "emscripten" / v for k, v in binaries
        }
        binaries["PKGCONFIG"] = "pkg-config"
        return binaries

    @property
    def configure_options(self):
        # return ""
        return [f"--host={self.arch_full}"]

    @property
    def configure_wrapper(self):
        yield "emconfigure"

    @property
    def make_wrapper(self):
        return "emmake"

    def get_bin_dir(self):
        return [self.install_path / "bin"]

    def get_env(self):
        env = super().get_env()
        env["PATH"].extend(
            [
                self.install_path,
                self.install_path / "upstream" / "emscripten",
                self.install_path / "node" / "14.18.2_64bit" / "bin",
            ]
        )
        env["EMSDK"] = self.install_path
        env["EMSDK_NODE"] = (
            self.install_path / "node" / "14.18.2_64bit" / "bin" / "node"
        )
        return env

    def set_comp_flags(self, env):
        super().set_comp_flags(env)
        env["CFLAGS"] = (
            " -Wp,-D_FORTIFY_SOURCE=2 -fexceptions --param=ssp-buffer-size=4 "
            + env["CFLAGS"]
        )
        env["CXXFLAGS"] = (
            " -Wp,-D_FORTIFY_SOURCE=2 -fexceptions --param=ssp-buffer-size=4 "
            + env["CXXFLAGS"]
        )

    def set_compiler(self, env):
        for k, v in self.binaries.items():
            env[k] = v

    def finalize_setup(self):
        super().finalize_setup()
        self.buildEnv.cmake_crossfile = self._gen_crossfile("cmake_cross_file.txt")
        self.buildEnv.meson_crossfile = self._gen_crossfile("meson_cross_file.txt")