import os
import sys
from methods import detect_darwin_sdk_path

def is_active():
    return True


def get_name():
    return "iOS"


def can_build():

    if sys.platform == 'darwin' or ("OSXCROSS_IOS" in os.environ):
        return True

    return False


def get_opts():
    from SCons.Variables import BoolVariable
    return [
        ('IPHONEPATH', 'Path to iPhone toolchain', '/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain'),
        ('IPHONESDK', 'Path to the iPhone SDK', ''),
        BoolVariable('game_center', 'Support for game center', True),
        BoolVariable('store_kit', 'Support for in-app store', True),
        BoolVariable('icloud', 'Support for iCloud', True),
        BoolVariable('ios_exceptions', 'Enable exceptions', False),
        ('ios_triple', 'Triple for ios toolchain', ''),
    ]


def get_flags():

    return [
        ('tools', False),
    ]


def configure(env):

    ## Build type

    if (env["target"].startswith("release")):
        env.Append(CPPDEFINES=['NDEBUG', ('NS_BLOCK_ASSERTIONS', 1)])
        if (env["optimize"] == "speed"): #optimize for speed (default)
            env.Append(CCFLAGS=['-O2', '-ftree-vectorize', '-fomit-frame-pointer'])
            env.Append(LINKFLAGS=['-O2'])
        else: #optimize for size
            env.Append(CCFLAGS=['-Os', '-ftree-vectorize'])
            env.Append(LINKFLAGS=['-Os'])

        if env["target"] == "release_debug":
            env.Append(CPPDEFINES=['DEBUG_ENABLED'])

    elif (env["target"] == "debug"):
        env.Append(CCFLAGS=['-gdwarf-2', '-O0'])
        env.Append(CPPDEFINES=['_DEBUG', ('DEBUG', 1), 'DEBUG_ENABLED', 'DEBUG_MEMORY_ENABLED'])

    if (env["use_lto"]):
        env.Append(CCFLAGS=['-flto'])
        env.Append(LINKFLAGS=['-flto'])

    ## Architecture
    if env["arch"] == "x86":  # i386
        env["bits"] = "32"
    elif env["arch"] == "x86_64":
        env["bits"] = "64"
    elif (env["arch"] == "arm" or env["arch"] == "arm32" or env["arch"] == "armv7" or env["bits"] == "32"):  # arm
        env["arch"] = "arm"
        env["bits"] = "32"
    else:  # armv64
        env["arch"] = "arm64"
        env["bits"] = "64"

    ## Compiler configuration

    # Save this in environment for use by other modules
    if "OSXCROSS_IOS" in os.environ:
        env["osxcross"] = True

    env['ENV']['PATH'] = env['IPHONEPATH'] + "/Developer/usr/bin/:" + env['ENV']['PATH']

    compiler_path = '$IPHONEPATH/usr/bin/${ios_triple}'
    s_compiler_path = '$IPHONEPATH/Developer/usr/bin/'

    ccache_path = os.environ.get("CCACHE")
    if ccache_path is None:
        env['CC'] = compiler_path + 'clang'
        env['CXX'] = compiler_path + 'clang++'
        env['S_compiler'] = s_compiler_path + 'gcc'
    else:
        # there aren't any ccache wrappers available for iOS,
        # to enable caching we need to prepend the path to the ccache binary
        env['CC'] = ccache_path + ' ' + compiler_path + 'clang'
        env['CXX'] = ccache_path + ' ' + compiler_path + 'clang++'
        env['S_compiler'] = ccache_path + ' ' + s_compiler_path + 'gcc'
    env['AR'] = compiler_path + 'ar'
    env['RANLIB'] = compiler_path + 'ranlib'

    ## Compile flags

    if (env["arch"] == "x86" or env["arch"] == "x86_64"):
        detect_darwin_sdk_path('iphonesimulator', env)
        env['ENV']['MACOSX_DEPLOYMENT_TARGET'] = '10.9'
        arch_flag = "i386" if env["arch"] == "x86" else env["arch"]
        env.Append(CCFLAGS=('-arch ' + arch_flag + ' -fobjc-abi-version=2 -fobjc-legacy-dispatch -fmessage-length=0 -fpascal-strings -fblocks -fasm-blocks -isysroot $IPHONESDK -mios-simulator-version-min=10.0').split())
    elif (env["arch"] == "arm"):
        detect_darwin_sdk_path('iphone', env)
        env.Append(CCFLAGS='-fno-objc-arc -arch armv7 -fmessage-length=0 -fno-strict-aliasing -fdiagnostics-print-source-range-info -fdiagnostics-show-category=id -fdiagnostics-parseable-fixits -fpascal-strings -fblocks -isysroot $IPHONESDK -fvisibility=hidden -mthumb "-DIBOutlet=__attribute__((iboutlet))" "-DIBOutletCollection(ClassName)=__attribute__((iboutletcollection(ClassName)))" "-DIBAction=void)__attribute__((ibaction)" -miphoneos-version-min=10.0 -MMD -MT dependencies'.split())
    elif (env["arch"] == "arm64"):
        detect_darwin_sdk_path('iphone', env)
        env.Append(CCFLAGS='-fno-objc-arc -arch arm64 -fmessage-length=0 -fno-strict-aliasing -fdiagnostics-print-source-range-info -fdiagnostics-show-category=id -fdiagnostics-parseable-fixits -fpascal-strings -fblocks -fvisibility=hidden -MMD -MT dependencies -miphoneos-version-min=10.0 -isysroot $IPHONESDK'.split())
        env.Append(CPPDEFINES=['NEED_LONG_INT'])
        env.Append(CPPDEFINES=['LIBYUV_DISABLE_NEON'])

    # Disable exceptions on non-tools (template) builds
    if not env['tools']:
        if env['ios_exceptions']:
            env.Append(CCFLAGS=['-fexceptions'])
        else:
            env.Append(CCFLAGS=['-fno-exceptions'])

    ## Link flags

    if (env["arch"] == "x86" or env["arch"] == "x86_64"):
        arch_flag = "i386" if env["arch"] == "x86" else env["arch"]
        env.Append(LINKFLAGS=['-arch', arch_flag, '-mios-simulator-version-min=10.0',
                              '-isysroot', '$IPHONESDK',
                              '-Xlinker',
                              '-objc_abi_version',
                              '-Xlinker', '2',
                              '-F$IPHONESDK',
                              ])
    elif (env["arch"] == "arm"):
        env.Append(LINKFLAGS=['-arch', 'armv7', '-Wl,-dead_strip', '-miphoneos-version-min=10.0'])
    if (env["arch"] == "arm64"):
        env.Append(LINKFLAGS=['-arch', 'arm64', '-Wl,-dead_strip', '-miphoneos-version-min=10.0'])

    env.Append(LINKFLAGS=['-isysroot', '$IPHONESDK',
                          '-framework', 'AudioToolbox',
                          '-framework', 'AVFoundation',
                          '-framework', 'CoreAudio',
                          '-framework', 'CoreGraphics',
                          '-framework', 'CoreMedia',
                          '-framework', 'CoreVideo',
                          '-framework', 'CoreMotion',
                          '-framework', 'Foundation',
                          '-framework', 'GameController',
                          '-framework', 'MediaPlayer',
                          '-framework', 'Metal',
                          '-framework', 'QuartzCore',
                          '-framework', 'Security',
                          '-framework', 'SystemConfiguration',
                          '-framework', 'UIKit',
                          '-framework', 'ARKit',
                          ])

    # Feature options
    if env['game_center']:
        env.Append(CPPDEFINES=['GAME_CENTER_ENABLED'])
        env.Append(LINKFLAGS=['-framework', 'GameKit'])

    if env['store_kit']:
        env.Append(CPPDEFINES=['STOREKIT_ENABLED'])
        env.Append(LINKFLAGS=['-framework', 'StoreKit'])

    if env['icloud']:
        env.Append(CPPDEFINES=['ICLOUD_ENABLED'])

    env.Prepend(CPPPATH=['$IPHONESDK/usr/include',
                         '$IPHONESDK/System/Library/Frameworks/AudioUnit.framework/Headers',
                         ])

    env['ENV']['CODESIGN_ALLOCATE'] = '/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/codesign_allocate'

    env.Prepend(CPPPATH=['#platform/iphone'])
    env.Append(CPPDEFINES=['IPHONE_ENABLED', 'UNIX_ENABLED', 'COREAUDIO_ENABLED'])

    env.Append(CPPDEFINES=['VULKAN_ENABLED'])
    env.Append(LINKFLAGS=['-framework', 'IOSurface'])
    if (env['use_static_mvk']):
        env.Append(LINKFLAGS=['-framework', 'MoltenVK'])
        env['builtin_vulkan'] = False
    elif not env['builtin_vulkan']:
        env.Append(LIBS=['vulkan'])