# vim: set sts=2 ts=8 sw=2 tw=99 et ft=python:
import os, sys

# Simple extensions do not need to modify this file.

class SDK(object):
  def __init__(self, sdk, ext, aDef, name, platform, dir):
    self.folder = 'hl2sdk-' + dir
    self.envvar = sdk
    self.ext = ext
    self.code = aDef
    self.define = name
    self.platform = platform
    self.name = dir
    self.path = None

WinOnly = ['windows']
WinLinux = ['windows', 'linux']
WinLinuxMac = ['windows', 'linux', 'mac']

PossibleSDKs = {
  'css':  SDK('HL2SDKCSS', '2.css', '6', 'CSS', WinLinuxMac, 'css'),
}

def ResolveEnvPath(env, folder):
  if env in os.environ:
    path = os.environ[env]
    if os.path.isdir(path):
      return path
    return None

  head = os.getcwd()
  oldhead = None
  while head != None and head != oldhead:
    path = os.path.join(head, folder)
    if os.path.isdir(path):
      return path
    oldhead = head
    head, tail = os.path.split(head)

  return None

def Normalize(path):
  return os.path.abspath(os.path.normpath(path))

class ExtensionConfig(object):
  def __init__(self):
    self.sdks = {}
    self.binaries = []
    self.extensions = []
    self.generated_headers = None
    self.mms_root = None
    self.sm_root = None

  @property
  def tag(self):
    if builder.options.debug == '1':
      return 'Debug'
    return 'Release'

  def detectSDKs(self):
    sdk_list = builder.options.sdks.split(',')
    use_all = sdk_list[0] == 'all'
    use_present = sdk_list[0] == 'present'

    for sdk_name in PossibleSDKs:
      sdk = PossibleSDKs[sdk_name]
      if builder.target_platform in sdk.platform:
        if builder.options.hl2sdk_root:
          sdk_path = os.path.join(builder.options.hl2sdk_root, sdk.folder)
        else:
          sdk_path = ResolveEnvPath(sdk.envvar, sdk.folder)
        if sdk_path is None or not os.path.isdir(sdk_path):
          if use_all or sdk_name in sdk_list:
            raise Exception('Could not find a valid path for {0}'.format(sdk.envvar))
          continue
        if use_all or use_present or sdk_name in sdk_list:
          sdk.path = Normalize(sdk_path)
          self.sdks[sdk_name] = sdk

    if len(self.sdks) < 1:
      raise Exception('At least one SDK must be available.')

    if builder.options.sm_path:
      self.sm_root = builder.options.sm_path
    else:
      self.sm_root = ResolveEnvPath('SOURCEMOD18', 'sourcemod-1.8')
      if not self.sm_root:
        self.sm_root = ResolveEnvPath('SOURCEMOD', 'sourcemod')
      if not self.sm_root:
        self.sm_root = ResolveEnvPath('SOURCEMOD_DEV', 'sourcemod-central')

    if not self.sm_root or not os.path.isdir(self.sm_root):
      raise Exception('Could not find a source copy of SourceMod')
    self.sm_root = Normalize(self.sm_root)

    if builder.options.mms_path:
      self.mms_root = builder.options.mms_path
    else:
      self.mms_root = ResolveEnvPath('MMSOURCE110', 'mmsource-1.10')
      if not self.mms_root:
        self.mms_root = ResolveEnvPath('MMSOURCE', 'metamod-source')
      if not self.mms_root:
        self.mms_root = ResolveEnvPath('MMSOURCE_DEV', 'mmsource-central')

    if not self.mms_root or not os.path.isdir(self.mms_root):
      raise Exception('Could not find a source copy of Metamod:Source')
    self.mms_root = Normalize(self.mms_root)

  def configure(self):
    cxx = builder.DetectCompilers()

    if cxx.like('gcc'):
      cxx.defines += [
        'stricmp=strcasecmp',
        '_stricmp=strcasecmp',
        '_snprintf=snprintf',
        '_vsnprintf=vsnprintf',
        'HAVE_STDINT_H',
        'GNUC',
      ]
      cxx.cflags += [
        '-pipe',
        '-fno-strict-aliasing',
        '-Wall',
        '-Werror',
        '-Wno-unused',
        '-Wno-switch',
        '-Wno-array-bounds',
        '-msse',
        '-m32',
      ]
      cxx.cxxflags += [
        '-std=c++11',
      ]

      have_gcc = cxx.vendor == 'gcc'
      have_clang = cxx.vendor == 'clang'
      if have_clang or (have_gcc and cxx.version >= '4'):
        cxx.cflags += ['-fvisibility=hidden']
        cxx.cxxflags += ['-fvisibility-inlines-hidden']
        if have_clang or (have_gcc and cxx.version >= '4.6'):
          cxx.cflags += ['-Wno-narrowing']
        if (have_gcc and cxx.version >= '4.7') or (have_clang and cxx.version >= '3'):
          cxx.cxxflags += ['-Wno-delete-non-virtual-dtor']
        if have_gcc and cxx.version >= '4.8':
          cxx.cflags += ['-Wno-unused-result']
      if have_clang:
        cxx.cxxflags += ['-Wno-implicit-exception-spec-mismatch']
        if cxx.version >= 'apple-clang-5.1' or cxx.version >= 'clang-3.4':
          cxx.cxxflags += ['-Wno-deprecated-register']
        else:
          cxx.cxxflags += ['-Wno-deprecated']
        cxx.cflags += ['-Wno-sometimes-uninitialized']

      cxx.linkflags += ['-m32']
      cxx.cxxflags += [
        '-fno-exceptions',
        '-fno-threadsafe-statics',
        '-Wno-non-virtual-dtor',
        '-Wno-overloaded-virtual',
      ]

      if have_gcc:
        cxx.cflags += ['-mfpmath=sse']
    elif cxx.vendor == 'msvc':
      if builder.options.debug == '1':
        cxx.cflags += ['/MTd']
        cxx.linkflags += ['/NODEFAULTLIB:libcmt']
      else:
        cxx.cflags += ['/MT']
      cxx.defines += [
        '_CRT_SECURE_NO_DEPRECATE',
        '_CRT_SECURE_NO_WARNINGS',
        '_CRT_NONSTDC_NO_DEPRECATE',
        '_ITERATOR_DEBUG_LEVEL=0',
      ]
      cxx.cflags += [
        '/W3',
      ]
      cxx.cxxflags += [
        '/EHsc',
        '/GR-',
        '/TP',
      ]
      cxx.linkflags += [
        '/MACHINE:X86',
        'kernel32.lib',
        'user32.lib',
        'gdi32.lib',
        'winspool.lib',
        'comdlg32.lib',
        'advapi32.lib',
        'shell32.lib',
        'ole32.lib',
        'oleaut32.lib',
        'uuid.lib',
        'odbc32.lib',
        'odbccp32.lib',
      ] 

    # Optimization
    if builder.options.opt == '1':
      cxx.defines += ['NDEBUG']
      if cxx.like('gcc'):
        cxx.cflags += ['-O3']
      elif cxx.like('msvc'):
        cxx.cflags += ['/Ox', '/Zo']
        cxx.linkflags += ['/OPT:ICF', '/OPT:REF']

    # Debugging
    if builder.options.debug == '1':
      cxx.defines += ['DEBUG', '_DEBUG']
      if cxx.like('msvc'):
        cxx.cflags += ['/Od', '/RTC1']

    # This needs to be after our optimization flags which could otherwise disable it.
    if cxx.vendor == 'msvc':
      # Don't omit the frame pointer.
      cxx.cflags += ['/Oy-']

    # Platform-specifics
    if builder.target_platform == 'linux':
      cxx.defines += ['_LINUX', 'POSIX']
      cxx.linkflags += ['-lm']
      if cxx.vendor == 'gcc':
        cxx.linkflags += ['-static-libgcc']
      elif cxx.vendor == 'clang':
        cxx.linkflags += ['-lgcc_eh']
    elif builder.target_platform == 'mac':
      cxx.defines += ['OSX', '_OSX', 'POSIX']
      cxx.cflags += ['-mmacosx-version-min=10.5']
      cxx.linkflags += [
        '-mmacosx-version-min=10.5',
        '-arch', 'i386',
        '-lstdc++',
        '-stdlib=libstdc++',
      ]
      cxx.cxxflags += ['-stdlib=libstdc++']
    elif builder.target_platform == 'windows':
      cxx.defines += ['WIN32', '_WINDOWS']

    # Finish up.
    cxx.includes += [
      os.path.join(self.sm_root, 'public'),
    ]
	
  def ConfigureForHL2(self, binary, sdk):
    compiler = binary.compiler

    if sdk.name == 'episode1':
      mms_path = os.path.join(self.mms_root, 'core-legacy')
    else:
      mms_path = os.path.join(self.mms_root, 'core')

    compiler.cxxincludes += [
      os.path.join(mms_path),
      os.path.join(mms_path, 'sourcehook'),
    ]

    defines = ['SE_' + PossibleSDKs[i].define + '=' + PossibleSDKs[i].code for i in PossibleSDKs]
    compiler.defines += defines

    paths = [
      ['public'],
      ['public', 'engine'],
      ['public', 'mathlib'],
      ['public', 'vstdlib'],
      ['public', 'tier0'],
      ['public', 'tier1']
    ]
    if sdk.name == 'episode1' or sdk.name == 'darkm':
      paths.append(['public', 'dlls'])
      paths.append(['game_shared'])
    else:
      paths.append(['public', 'game', 'server'])
      paths.append(['public', 'toolframework'])
      paths.append(['game', 'shared'])
      paths.append(['common'])

    compiler.defines += ['SOURCE_ENGINE=' + sdk.code]

    if sdk.name in ['sdk2013', 'bms'] and compiler.like('gcc'):
      # The 2013 SDK already has these in public/tier0/basetypes.h
      compiler.defines.remove('stricmp=strcasecmp')
      compiler.defines.remove('_stricmp=strcasecmp')
      compiler.defines.remove('_snprintf=snprintf')
      compiler.defines.remove('_vsnprintf=vsnprintf')

    if compiler.like('msvc'):
      compiler.defines += ['COMPILER_MSVC', 'COMPILER_MSVC32']
    else:
      compiler.defines += ['COMPILER_GCC']

    # For everything after Swarm, this needs to be defined for entity networking
    # to work properly with sendprop value changes.
    if sdk.name in ['blade', 'insurgency', 'csgo', 'dota']:
      compiler.defines += ['NETWORK_VARS_ENABLED']

    if sdk.name in ['css', 'hl2dm', 'dods', 'sdk2013', 'bms', 'tf2', 'l4d', 'nucleardawn', 'l4d2', 'dota']:
      if builder.target_platform in ['linux', 'mac']:
        compiler.defines += ['NO_HOOK_MALLOC', 'NO_MALLOC_OVERRIDE']

    if sdk.name == 'csgo' and builder.target_platform == 'linux':
      compiler.linkflags += ['-lstdc++']

    for path in paths:
      compiler.cxxincludes += [os.path.join(sdk.path, *path)]

    if builder.target_platform == 'linux':
      if sdk.name == 'episode1':
        lib_folder = os.path.join(sdk.path, 'linux_sdk')
      elif sdk.name in ['sdk2013', 'bms']:
        lib_folder = os.path.join(sdk.path, 'lib', 'public', 'linux32')
      else:
        lib_folder = os.path.join(sdk.path, 'lib', 'linux')
    elif builder.target_platform == 'mac':
      if sdk.name in ['sdk2013', 'bms']:
        lib_folder = os.path.join(sdk.path, 'lib', 'public', 'osx32')
      else:
        lib_folder = os.path.join(sdk.path, 'lib', 'mac')

    if builder.target_platform in ['linux', 'mac']:
      if sdk.name in ['sdk2013', 'bms']:
        compiler.postlink += [
          compiler.Dep(os.path.join(lib_folder, 'tier1.a')),
          compiler.Dep(os.path.join(lib_folder, 'mathlib.a'))
        ]
      else:
        compiler.postlink += [
          compiler.Dep(os.path.join(lib_folder, 'tier1_i486.a')),
          compiler.Dep(os.path.join(lib_folder, 'mathlib_i486.a'))
        ]

      if sdk.name in ['blade', 'insurgency', 'csgo', 'dota']:
        compiler.postlink += [compiler.Dep(os.path.join(lib_folder, 'interfaces_i486.a'))]

    dynamic_libs = []
    if builder.target_platform == 'linux':
      if sdk.name in ['css', 'hl2dm', 'dods', 'tf2', 'sdk2013', 'bms', 'nucleardawn', 'l4d2']:
        dynamic_libs = ['libtier0_srv.so', 'libvstdlib_srv.so']
      elif sdk.name in ['l4d', 'blade', 'insurgency', 'csgo', 'dota']:
        dynamic_libs = ['libtier0.so', 'libvstdlib.so']
      else:
        dynamic_libs = ['tier0_i486.so', 'vstdlib_i486.so']
    elif builder.target_platform == 'mac':
      compiler.linkflags.append('-liconv')
      dynamic_libs = ['libtier0.dylib', 'libvstdlib.dylib']
    elif builder.target_platform == 'windows':
      libs = ['tier0', 'tier1', 'vstdlib', 'mathlib']
      if sdk.name in ['swarm', 'blade', 'insurgency', 'csgo', 'dota']:
        libs.append('interfaces')
      for lib in libs:
        lib_path = os.path.join(sdk.path, 'lib', 'public', lib) + '.lib'
        compiler.linkflags.append(compiler.Dep(lib_path))

    for library in dynamic_libs:
      source_path = os.path.join(lib_folder, library)
      output_path = os.path.join(binary.localFolder, library)

      def make_linker(source_path, output_path):
        def link(context, binary):
          cmd_node, (output,) = context.AddSymlink(source_path, output_path)
          return output
        return link

      linker = make_linker(source_path, output_path)
      compiler.linkflags[0:0] = [compiler.Dep(library, linker)]

    return binary

  def ConfigureForExtension(self, context, compiler):
    compiler.cxxincludes += [
      os.path.join(context.currentSourcePath),
      os.path.join(context.currentSourcePath, 'sdk'),
      os.path.join(self.sm_root, 'public'),
      os.path.join(self.sm_root, 'public', 'extensions'),
      os.path.join(self.sm_root, 'sourcepawn', 'include'),
      os.path.join(self.sm_root, 'public', 'amtl', 'include'),
    ]
    return compiler

  def HL2Project(self, context, name):
    project = context.compiler.LibraryProject(name)
    self.ConfigureForExtension(context, project.compiler)
    return project
	
  def HL2Config(self, project, name, sdk):
    binary = project.Configure(name, '{0} - {1}'.format(self.tag, sdk.name))
    return self.ConfigureForHL2(binary, sdk)

Extension = ExtensionConfig()
Extension.detectSDKs()
Extension.configure()

# Add additional buildscripts here
BuildScripts = [
  'AMBuilder',
]

if builder.backend == 'amb2':
  BuildScripts += [
    'PackageScript',
  ]

builder.RunBuildScripts(BuildScripts, { 'Extension': Extension})