# Copyright 2018 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

from recipe_engine import recipe_api


PLATFORM_TO_TRIPLE = {
    "fuchsia-amd64": "x86_64-fuchsia",
    "fuchsia-arm64": "aarch64-fuchsia",
    "linux-amd64": "x86_64-linux-gnu",
    "linux-arm64": "aarch64-linux-gnu",
    "mac-amd64": "x86_64-apple-darwin",
    "mac-arm64": "arm64-apple-darwin",
    "windows-amd64": "x86_64-pc-windows-msvc",
    "windows-arm64": "aarch64-pc-windows-msvc",
}


class Platform:
    def __init__(self, api, os, arch):
        self._api = api
        self._os = os
        self._arch = arch

    @property
    def is_win(self):
        """Returns True iff the target platform is Windows."""
        return self.os == "windows"

    @property
    def is_mac(self):
        """Returns True iff the target platform is macOS."""
        return self.os == "mac"

    @property
    def is_linux(self):
        """Returns True iff the target platform is Linux."""
        return self.os == "linux"

    @property
    def is_fuchsia(self):
        """Returns True iff the target platform is Fuchsia."""
        return self.os == "fuchsia"

    @property
    def is_host(self):
        """Returns True iff the target platform is host."""
        return self == self._api.platform_util.host

    @property
    def os(self):
        """Returns the target os name which will be in:
        * windows
        * mac
        * linux
        """
        return self._os

    @property
    def arch(self):
        """Returns the target CPU architecture."""
        return self._arch

    @property
    def platform(self):
        """Returns the target platform in the <os>-<arch> format."""
        return f"{self.os}-{self.arch}"

    @property
    def triple(self):
        """Returns the target triple."""
        return PLATFORM_TO_TRIPLE[self.platform]

    def __str__(self):
        return self.platform

    def __eq__(self, other):
        if isinstance(other, Platform):
            return self._os == other._os and self._arch == other._arch
        elif isinstance(other, str):
            return self.platform == other
        return False

    def __ne__(self, other):
        return not self.__eq__(other)


class PlatformUtilApi(recipe_api.RecipeApi):
    def platform(self, name):
        return Platform(self.m, *name.split("-", 2))

    @property
    def host(self):
        return Platform(
            self.m,
            self.m.platform.name.replace("win", "windows"),
            {"intel": {32: "386", 64: "amd64"}, "arm": {32: "armv6", 64: "arm64"}}[
                self.m.platform.arch
            ][self.m.platform.bits],
        )