# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.


@depends(toolchains_base_dir, "--help")
@imports(_from="os.path", _import="isdir")
@imports(_from="mozboot.android", _import="NDK_VERSION")
def default_android_ndk_root(toolchains_base_dir, _):
    for ndk in ("android-ndk-%s" % NDK_VERSION, "android-ndk"):
        path = os.path.join(toolchains_base_dir, ndk)
        if isdir(path):
            return path


option(
    "--with-android-ndk",
    nargs=1,
    default=default_android_ndk_root,
    help="location where the Android NDK can be found{|}",
)

option("--with-android-toolchain", nargs=1, help="location of the Android toolchain")

option(
    "--with-android-googlevr-sdk", nargs=1, help="location of the Android GoogleVR SDK"
)


@depends(target)
def min_android_version(target):
    if target.cpu in ["aarch64", "x86_64"]:
        # 64-bit support was added in API 21.
        return "21"
    return "16"


option(
    "--with-android-version",
    nargs=1,
    help="android platform version{|}",
    default=min_android_version,
)


@depends("--with-android-version", min_android_version)
@imports(_from="__builtin__", _import="ValueError")
def android_version(value, min_version):
    if not value:
        # Someone has passed --without-android-version.
        die("--with-android-version cannot be disabled.")

    try:
        version = int(value[0])
    except ValueError:
        die("--with-android-version expects an integer value")

    if version < int(min_version):
        die(
            "--with-android-version must be at least %s (got %s)", min_version, value[0]
        )

    return version


add_old_configure_assignment("android_version", android_version)


@depends("--with-android-ndk")
@imports(_from="os.path", _import="isdir")
def ndk(value):
    if value:
        if not isdir(value[0]):
            die(
                "The path you specified with --with-android-ndk (%s) is not "
                "a directory" % value[0]
            )
        return value[0]

    die(
        "You must specify --with-android-ndk=/path/to/ndk when targeting Android, "
        "or try |mach bootstrap|."
    )


set_config("ANDROID_NDK", ndk)
add_old_configure_assignment("android_ndk", ndk)


@depends(ndk)
@checking("for android ndk version")
@imports(_from="__builtin__", _import="open")
@imports(_from="mozboot.android", _import="NDK_VERSION")
@imports(_from="mozboot.android", _import="get_ndk_version")
@imports(_from="mozboot.android", _import="GetNdkVersionError")
def ndk_version(ndk):
    if not ndk:
        # Building 'js/src' for non-Android.
        return

    try:
        major, minor, human = get_ndk_version(ndk)
    except GetNdkVersionError as e:
        die(str(e))

    if NDK_VERSION != human:
        die(
            "The only supported version of the NDK is %s (have %s)\n"
            "Please run |mach bootstrap| "
            "to install the correct NDK." % (NDK_VERSION, human)
        )
    return namespace(
        major=major,
        minor=minor,
    )


set_config("ANDROID_NDK_MAJOR_VERSION", ndk_version.major)
set_config("ANDROID_NDK_MINOR_VERSION", ndk_version.minor)


@depends(target, android_version, ndk)
@checking("for android platform directory")
@imports(_from="os.path", _import="isdir")
def android_platform(target, android_version, ndk):
    if target.os != "Android":
        return

    if "aarch64" == target.cpu:
        target_dir_name = "arm64"
    else:
        target_dir_name = target.cpu

    # Not all Android releases have their own platform release. We use
    # the next lower platform version in these cases.
    if android_version in (11, 10):
        platform_version = 9
    elif android_version in (20, 22):
        platform_version = android_version - 1
    else:
        platform_version = android_version

    platform_dir = os.path.join(
        ndk, "platforms", "android-%s" % platform_version, "arch-%s" % target_dir_name
    )

    if not isdir(platform_dir):
        die(
            "Android platform directory not found. With the current "
            "configuration, it should be in %s" % platform_dir
        )

    return platform_dir


add_old_configure_assignment("android_platform", android_platform)
set_config("ANDROID_PLATFORM", android_platform)


@depends(android_platform, ndk, target)
@checking("for android sysroot directory")
@imports(_from="os.path", _import="isdir")
def android_sysroot(android_platform, ndk, target):
    if target.os != "Android":
        return

    # NDK r15 has both unified and non-unified headers, but we only support
    # non-unified for that NDK, so look for that first.
    search_dirs = [
        # (<if this directory exists>, <return this directory>)
        (os.path.join(android_platform, "usr", "include"), android_platform),
        (os.path.join(ndk, "sysroot"), os.path.join(ndk, "sysroot")),
    ]

    for test_dir, sysroot_dir in search_dirs:
        if isdir(test_dir):
            return sysroot_dir

    die(
        "Android sysroot directory not found in %s."
        % str([sysroot_dir for test_dir, sysroot_dir in search_dirs])
    )


add_old_configure_assignment("android_sysroot", android_sysroot)


@depends(android_platform, ndk, target)
@checking("for android system directory")
@imports(_from="os.path", _import="isdir")
def android_system(android_platform, ndk, target):
    if target.os != "Android":
        return

    # NDK r15 has both unified and non-unified headers, but we only support
    # non-unified for that NDK, so look for that first.
    search_dirs = [
        os.path.join(android_platform, "usr", "include"),
        os.path.join(ndk, "sysroot", "usr", "include", target.toolchain),
    ]

    for system_dir in search_dirs:
        if isdir(system_dir):
            return system_dir

    die("Android system directory not found in %s." % str(search_dirs))


add_old_configure_assignment("android_system", android_system)


@depends(target, host, ndk, "--with-android-toolchain")
@checking("for the Android toolchain directory", lambda x: x or "not found")
@imports(_from="os.path", _import="isdir")
@imports(_from="mozbuild.shellutil", _import="quote")
def android_toolchain(target, host, ndk, toolchain):
    if not ndk:
        return
    if toolchain:
        return toolchain[0]
    else:
        if target.cpu == "arm" and target.endianness == "little":
            target_base = "arm-linux-androideabi"
        elif target.cpu == "x86":
            target_base = "x86"
        elif target.cpu == "x86_64":
            target_base = "x86_64"
        elif target.cpu == "aarch64" and target.endianness == "little":
            target_base = "aarch64-linux-android"
        else:
            die("Target cpu is not supported.")

        toolchain_format = "%s/toolchains/%s-4.9/prebuilt/%s-%s"
        host_kernel = "windows" if host.kernel == "WINNT" else host.kernel.lower()

        toolchain = toolchain_format % (ndk, target_base, host_kernel, host.cpu)
        log.debug("Trying %s" % quote(toolchain))
        if not isdir(toolchain) and host.cpu == "x86_64":
            toolchain = toolchain_format % (ndk, target_base, host_kernel, "x86")
            log.debug("Trying %s" % quote(toolchain))
        if isdir(toolchain):
            return toolchain
        die("You have to specify --with-android-toolchain=" "/path/to/ndk/toolchain.")


set_config("ANDROID_TOOLCHAIN", android_toolchain)


@depends(target)
def android_toolchain_prefix_base(target):
    if target.cpu == "x86":
        # Ideally, the --target should just have the right x86 variant
        # in the first place.
        return "i686-linux-android"
    return target.toolchain


option(
    env="STLPORT_CPPFLAGS",
    nargs=1,
    help="Options compiler should pass for standard C++ library",
)


@depends("STLPORT_CPPFLAGS", ndk)
@imports(_from="os.path", _import="isdir")
def stlport_cppflags(value, ndk):
    if value and len(value):
        return value.split()
    if not ndk:
        return

    ndk_base = os.path.join(ndk, "sources", "cxx-stl")
    cxx_base = os.path.join(ndk_base, "llvm-libc++")
    cxx_include = os.path.join(cxx_base, "libcxx", "include")
    cxxabi_base = os.path.join(ndk_base, "llvm-libc++abi")
    cxxabi_include = os.path.join(cxxabi_base, "libcxxabi", "include")

    if not isdir(cxx_include):
        # NDK r13 removes the inner "libcxx" directory.
        cxx_include = os.path.join(cxx_base, "include")
        if not isdir(cxx_include):
            die("Couldn't find path to libc++ includes in the android ndk")

    if not isdir(cxxabi_include):
        # NDK r13 removes the inner "libcxxabi" directory.
        cxxabi_include = os.path.join(cxxabi_base, "include")
        if not isdir(cxxabi_include):
            die("Couldn't find path to libc++abi includes in the android ndk")

    # Add android/support/include/ for prototyping long double math
    # functions, locale-specific C library functions, multibyte support,
    # etc.
    return [
        # You'd think we'd want to use -stdlib=libc++, but this doesn't work
        # (cf. https://bugzilla.mozilla.org/show_bug.cgi?id=1510897#c2)
        # Using -stdlib=libc++ and removing some of the -I below also doesn't
        # work because not everything that is in cxx_include comes in the C++
        # header directory that comes with clang.
        "-stdlib=libstdc++",
        "-I%s" % cxx_include,
        "-I%s" % os.path.join(ndk, "sources", "android", "support", "include"),
        "-I%s" % cxxabi_include,
    ]


add_old_configure_assignment("stlport_cppflags", stlport_cppflags)


@depends(android_system, android_sysroot, android_toolchain, android_version)
def extra_toolchain_flags(
    android_system, android_sysroot, toolchain_dir, android_version
):
    if not android_sysroot:
        return []
    flags = [
        "-isystem",
        android_system,
        "-isystem",
        os.path.join(android_sysroot, "usr", "include"),
        "-gcc-toolchain",
        toolchain_dir,
        "-D__ANDROID_API__=%d" % android_version,
    ]
    return flags


@depends(android_toolchain_prefix_base, android_toolchain)
def android_toolchain_prefix(prefix_base, toolchain):
    if toolchain:
        return "%s/bin/%s-" % (toolchain, prefix_base)


imply_option(
    "--with-toolchain-prefix", android_toolchain_prefix, reason="--with-android-ndk"
)


@depends(
    extra_toolchain_flags,
    stlport_cppflags,
    android_toolchain,
    android_toolchain_prefix_base,
)
@imports(_from="os.path", _import="isdir")
def bindgen_cflags_android(toolchain_flags, stlport_flags, toolchain, toolchain_prefix):
    if not toolchain_flags:
        return

    gcc_include = os.path.join(toolchain, "lib", "gcc", toolchain_prefix, "4.9.x")
    if not isdir(gcc_include):
        gcc_include = os.path.join(toolchain, "lib", "gcc", toolchain_prefix, "4.9")

    return (
        toolchain_flags
        + stlport_flags
        + [
            "-I%s" % os.path.join(gcc_include, "include"),
            "-I%s" % os.path.join(gcc_include, "include-fixed"),
        ]
    )


@depends("--with-android-googlevr-sdk", target)
@checking("for GoogleVR SDK", lambda x: x.result)
@imports(_from="os.path", _import="exists")
@imports(_from="os.path", _import="abspath")
def googlevr_sdk(value, target):
    if not value:
        return namespace(result="Not specified")
    path = abspath(value[0])
    if not exists(path):
        die("Could not find GoogleVR SDK %s", path)
    include = "%s/libraries/headers/" % path
    if "arm" == target.cpu:
        arch = "armeabi-v7a"
    elif "aarch64" == target.cpu:
        arch = "arm64-v8a"
    elif "x86" == target.cpu:
        arch = "x86"
    else:
        die("Unsupported GoogleVR cpu architecture %s" % target.cpu)

    libs = "{0}/libraries/jni/{1}/".format(path, arch)

    if not exists(libs):
        die(
            "Could not find GoogleVR NDK at %s. Did you try running "
            "'./gradlew :extractNdk' in %s?",
            libs,
            path,
        )

    return namespace(
        result=path,
        include=include,
        libs=libs,
        enabled=True,
    )


set_define("MOZ_ANDROID_GOOGLE_VR", googlevr_sdk.enabled)
set_config("MOZ_ANDROID_GOOGLE_VR", googlevr_sdk.enabled)
set_config("MOZ_ANDROID_GOOGLE_VR_INCLUDE", googlevr_sdk.include)
set_config("MOZ_ANDROID_GOOGLE_VR_LIBS", googlevr_sdk.libs)