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

class AMXXConfig(object):
  def __init__(self):
    self.binaries = []
    self.modules = []
    self.plugins = {}
    self.libpc300 = None
    self.amxxpc = None
    self.metamod_path = None
    self.hlsdk_path = None
    self.mysql_path = None
    self.generated_headers = []
    self.versionlib = None
    self.zlib = None
    self.hashing = None
    self.utf8rewind = None
    self.csx_app = None
    self.stdcxx_path = None
    self.nasm_path = None

  def use_auto_versioning(self):
    if builder.backend != 'amb2':
      return False
    return not getattr(builder.options, 'disable_auto_versioning', False)

  def detectProductVersion(self):
    builder.AddConfigureFile('product.version')

    # For OS X dylib versioning
    import re
    with open(os.path.join(builder.sourcePath, 'product.version'), 'r') as fp:
      productContents = fp.read()
    m = re.match('(\d+)\.(\d+)\.(\d+).*', productContents)
    if m == None:
      self.productVersion = '1.0.0'
    else:
      major, minor, release = m.groups()
      self.productVersion = '{0}.{1}.{2}'.format(major, minor, release)

  def detectMetamod(self):
    metamod_path = builder.options.metamod_path
    if not len(metamod_path):
      metamod_path = os.getenv('METAMOD', '')

    if len(metamod_path):
      self.metamod_path = os.path.join(builder.originalCwd, metamod_path)
      if not os.path.exists(os.path.join(self.metamod_path, 'metamod')):
        raise Exception('Metamod path does not exist: {0}'.format(metamod_path))
    else:
      try_paths = [
        os.path.join(builder.sourcePath, '..', 'metamod'),
        os.path.join(builder.sourcePath, '..', 'metamod-am'),
        os.path.join(builder.sourcePath, '..', 'metamod-hl1'),
      ]
      for try_path in try_paths:
        if os.path.exists(os.path.join(try_path, 'metamod')):
          self.metamod_path = os.path.normpath(try_path)
          break
      if not self.metamod_path:
        raise Exception('Could not find the source code to Metamod! Try passing --metamod to configure.py.')

  def detectHlsdk(self):
    hlsdk_path = builder.options.hlsdk_path
    if not len(hlsdk_path):
      hlsdk_path = os.getenv('HLSDK', '')

    if len(hlsdk_path):
      self.hlsdk_path = os.path.join(builder.originalCwd, hlsdk_path)
      if not os.path.exists(self.hlsdk_path):
        raise Exception('HLSDK path does not exist: {0}'.format(hlsdk_path))
    else:
      try_paths = [
        os.path.join(builder.sourcePath, '..', 'hlsdk'),
      ]
      for try_path in try_paths:
        if os.path.exists(try_path):
          self.hlsdk_path = os.path.normpath(try_path)
          break
      if not self.hlsdk_path:
        raise Exception('Could not find the HLSDK! Try passing --hlsdk to configure.py.')

  def detectMysql(self):
    if builder.options.disable_mysql:
      return

    mysql_path = builder.options.mysql_path
    if not len(mysql_path):
      mysql_path = os.getenv('MYSQL55', '')

    if len(mysql_path):
      self.mysql_path = os.path.join(builder.originalCwd, mysql_path)
      if not os.path.exists(self.mysql_path):
        raise Exception('MySQL path does not exist: {0}'.format(mysql_path))
    else:
      try_paths = [
        os.path.join(builder.sourcePath, '..', 'mysql-5.5'),
      ]
      for try_path in try_paths:
        if os.path.exists(try_path):
          self.mysql_path = os.path.normpath(try_path)
          break
      if not self.mysql_path:
        raise Exception('Could not find MySQL! Try passing --mysql to configure.py.')

  def detectNASM(self):
    import subprocess

    nasm_paths = [
      getattr(builder.options, 'nasm_path', 'nasm'),
    ]
    if builder.target_platform == 'windows':
      nasm_paths += [os.path.join(
        builder.sourcePath,
        'build_deps',
        'nasm',
        'nasm.exe')
      ]

    for nasm_path in nasm_paths:
      try:
        subprocess.check_output([nasm_path, '-v'])
        self.nasm_path = nasm_path
        break
      except:
        pass

    if self.nasm_path is None:
      raise Exception('Could not find a suitable path for nasm')

  # Returns list of lines of output from the compiler
  @staticmethod
  def invokeCompiler(args):
    if builder.compiler:
      p = subprocess.Popen(builder.compiler.argv + args, stdout=subprocess.PIPE)
      output = p.communicate()[0]
      if hasattr(output,'encoding') and output.encoding is not None:
          encoding = output.encoding
      else:
          encoding = locale.getpreferredencoding()
      return output.decode(encoding, 'replace').split('\n')
    return None

  def configure(self):
    builder.AddConfigureFile('pushbuild.txt')

    cxx = builder.DetectCompilers()

    if cxx.like('gcc'):
      self.configure_gcc(cxx)
    elif cxx.like('msvc'):
      self.configure_msvc(cxx)

    # Optimization
    if builder.options.opt == '1':
      cxx.defines += ['NDEBUG']

    # Debugging
    if builder.options.debug == '1':
      cxx.defines += ['DEBUG', '_DEBUG']

    # Platform-specifics
    if builder.target_platform == 'linux':
      self.configure_linux(cxx)
    elif builder.target_platform == 'mac':
      self.configure_mac(cxx)
    elif builder.target_platform == 'windows':
      self.configure_windows(cxx)

    # Finish up.
    cxx.defines += [
      'AMX_NOPROPLIST',
      'PAWN_CELL_SIZE=32',
      'AMXMODX_BUILD',
      'AMXX_USE_VERSIONLIB',
    ]

    if self.use_auto_versioning():
      cxx.defines += ['AMXX_GENERATED_BUILD']
      cxx.includes += [os.path.join(builder.buildPath, 'includes')]
      cxx.includes += [os.path.join(builder.sourcePath, 'support', 'versionlib')]

    cxx.includes += [os.path.join(builder.sourcePath, 'public')]
    cxx.includes += [os.path.join(builder.sourcePath, 'public', 'sdk')]
    cxx.includes += [os.path.join(builder.sourcePath, 'public', 'amtl')]
    cxx.includes += [os.path.join(builder.sourcePath, 'public', 'amtl', 'amtl')]
    cxx.includes += [os.path.join(builder.sourcePath, 'public', 'memtools')]
    cxx.includes += [os.path.join(builder.sourcePath, 'third_party')]
    cxx.includes += [os.path.join(builder.sourcePath, 'third_party', 'hashing')]
    cxx.includes += [os.path.join(builder.sourcePath, 'third_party', 'zlib')]
    cxx.includes += [os.path.join(builder.sourcePath, 'third_party', 'utf8rewind')]

  def configure_gcc(self, cxx):
    cxx.cflags += [
      '-pipe',
      '-fno-strict-aliasing',
      '-Wall',
      '-Werror',
      '-Wno-uninitialized',
      '-Wno-unused',
      '-Wno-switch',
      '-Wno-format',
      '-Wno-format-security',
      '-m32',
    ]
    cxx.cxxflags += [
      '-Wno-invalid-offsetof',
      '-std=c++11',
    ]

    cxx.linkflags += ['-m32']

    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', '-Wno-error=sign-compare']
    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']
      if builder.target_platform == 'linux' and cxx.version >= '3.6':
        cxx.cxxflags += ['-Wno-inconsistent-missing-override']
      if builder.target_platform == 'linux' and cxx.version >= '3.9':
        cxx.cxxflags += ['-Wno-varargs']
      if builder.target_platform == 'linux' and cxx.version >= '4.0':
        cxx.cxxflags += ['-Wno-address-of-packed-member']

    if have_gcc:
      cxx.cflags += ['-Wno-parentheses']
      cxx.c_only_flags += ['-std=c99']
    elif have_clang:
      cxx.cflags += ['-Wno-logical-op-parentheses']

    cxx.cxxflags += [
      '-fno-exceptions',
      '-fno-rtti',
    ]

    if builder.options.opt == '1':
      cxx.cflags += ['-O2']

  def configure_msvc(self, cxx):
    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',
      '/SUBSYSTEM:WINDOWS',
      'kernel32.lib',
      'user32.lib',
      'gdi32.lib',
      'winspool.lib',
      'comdlg32.lib',
      'advapi32.lib',
      'shell32.lib',
      'ole32.lib',
      'oleaut32.lib',
      'uuid.lib',
      'odbc32.lib',
      'odbccp32.lib',
    ]

    if cxx.version >= 1900:
      cxx.linkflags += ['legacy_stdio_definitions.lib', 'legacy_stdio_wide_specifiers.lib']

    if builder.options.opt == '1':
      cxx.cflags += ['/Ox']
      cxx.linkflags += ['/OPT:ICF', '/OPT:REF']

    if builder.options.debug == '1':
      cxx.cflags += ['/Od', '/RTC1']

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

  def configure_linux(self, cxx):
    cxx.defines += ['_LINUX', 'POSIX', 'LINUX']
    cxx.linkflags  += ['-ldl', '-lm']
    if cxx.vendor == 'gcc':
      cxx.linkflags  += ['-static-libgcc']
    elif cxx.vendor == 'clang':
      cxx.linkflags  += ['-lgcc_eh']
    if cxx.like('gcc'):
      self.stdcxx_path = self.invokeCompiler(['-m32', '-print-file-name=' + 'libstdc++.a'])[0]

  def configure_mac(self, cxx):
    cxx.defines += ['OSX', '_OSX', 'POSIX']
    cxx.cflags += ['-mmacosx-version-min=10.5']
    cxx.linkflags += [
      '-mmacosx-version-min=10.5',
      '-arch', 'i386',
      '-lstdc++',
      '-stdlib=libc++',
      '-framework', 'CoreServices',
    ]
    cxx.cxxflags += ['-stdlib=libc++']

  def configure_windows(self, cxx):
    cxx.defines += ['WIN32', '_WINDOWS']

  #
  # Low-level compiler and binary construction.
  #

  def ConfigureForModule(self, context, compiler):
    compiler.cxxincludes += [
      os.path.join(context.currentSourcePath),
      os.path.join(context.currentSourcePath, 'sdk'),
      os.path.join(self.metamod_path, 'metamod'),
      os.path.join(self.hlsdk_path, 'common'),
      os.path.join(self.hlsdk_path, 'dlls'),
      os.path.join(self.hlsdk_path, 'engine'),
      os.path.join(self.hlsdk_path, 'game_shared'),
      os.path.join(self.hlsdk_path, 'public'),
      os.path.join(self.hlsdk_path, 'pm_shared'),
    ]
    return compiler

  def AddVersioning(self, binary):
    if builder.target_platform == 'windows':
      binary.compiler.rcdefines += [
        'BINARY_NAME="{0}"'.format(binary.outputFile),
        'RC_COMPILE',
      ]
      if self.use_auto_versioning():
        binary.compiler.rcdefines += ['AMXX_GENERATED_BUILD']
    elif builder.target_platform == 'mac':
      if binary.type == 'library':
        binary.compiler.postlink += [
          '-compatibility_version', '1.0.0',
          '-current_version', self.productVersion
        ]
    if self.use_auto_versioning():
      binary.compiler.linkflags += [self.versionlib]
      binary.compiler.sourcedeps += AMXX.generated_headers
    return binary

  #
  # High level job construction for libraries, metamod plugins, modules, and
  # executables.
  #

  def Library(self, context, name):
    binary = context.compiler.Library(name)
    return self.AddVersioning(binary)

  def MetaPlugin(self, context, name):
    if builder.target_platform == 'mac' or builder.target_platform == 'windows':
      name = name + '_mm'
    elif builder.target_platform == 'linux':
      name = name + '_mm_i386'
    binary = context.compiler.Library(name)
    self.ConfigureForModule(context, binary.compiler)
    return self.AddVersioning(binary)

  def MetaModule(self, context, name):
    if builder.target_platform == 'mac' or builder.target_platform == 'windows':
      name = name + '_amxx'
    elif builder.target_platform == 'linux':
      name = name + '_amxx_i386'
    binary = context.compiler.Library(name)
    self.ConfigureForModule(context, binary.compiler)
    return self.AddVersioning(binary)

  def Program(self, context, name):
    binary = context.compiler.Program(name)
    return self.AddVersioning(binary)

  def AddAssembly(self, context, binary, input_file, output_file, includes=[], extra_argv=[]):
    if builder.target_platform == 'windows':
      obj_type = 'win32'
    elif builder.target_platform == 'linux':
      obj_type = 'elf32'
    elif builder.target_platform == 'mac':
      obj_type = 'macho32'

    input_path = os.path.join(context.currentSourcePath, input_file)
    output_path = output_file

    argv = [
      self.nasm_path,
      '-I{0}{1}'.format(context.currentSourcePath, os.sep),
      input_path,
      '-f', obj_type,
      '-o', output_path,
    ] + extra_argv

    extra_includes = []
    for include_file in includes:
      extra_includes.append(os.path.join(context.currentSourcePath, include_file))

    cmd_node, output_nodes = context.AddCommand(
      inputs = [input_path] + extra_includes,
      argv = argv,
      outputs = [output_path])

    binary.compiler.linkflags += [output_nodes[0]]

AMXX = AMXXConfig()
AMXX.detectProductVersion()
AMXX.detectMetamod()
AMXX.detectHlsdk()
AMXX.detectMysql()
AMXX.detectNASM()
AMXX.configure()

if AMXX.use_auto_versioning():
  AMXX.generated_headers = builder.RunScript(
    'support/Versioning',
    { 'AMXX': AMXX }
  )
  AMXX.versionlib = builder.RunScript(
    'support/versionlib/AMBuilder',
    { 'AMXX': AMXX }
  )

AMXX.zlib = builder.RunScript(
  'third_party/zlib/AMBuilder'
)

AMXX.hashing = builder.RunScript(
  'third_party/hashing/AMBuilder'
)

AMXX.utf8rewind = builder.RunScript(
  'third_party/utf8rewind/AMBuilder'
)

builder.RunBuildScripts(
  [
    'amxmodx/AMBuilder',
    'compiler/amxxpc/AMBuilder',
    'compiler/libpc300/AMBuilder',
    'modules/cstrike/cstrike/AMBuilder',
    'modules/cstrike/csx/AMBuilder',
    'modules/dod/dodfun/AMBuilder',
    'modules/dod/dodx/AMBuilder',
    'modules/engine/AMBuilder',
    'modules/fakemeta/AMBuilder',
    'modules/fun/AMBuilder',
    'modules/geoip/AMBuilder',
    'modules/hamsandwich/AMBuilder',
    'modules/json/AMBuilder',
    'modules/mysqlx/AMBuilder',
    'modules/ns/AMBuilder',
    'modules/nvault/AMBuilder',
    'modules/regex/AMBuilder',
    'modules/sockets/AMBuilder',
    'modules/sqlite/AMBuilder',
    'modules/tfcx/AMBuilder',
    'modules/ts/tsfun/AMBuilder',
    'modules/ts/tsx/AMBuilder',
  ],
  { 'AMXX': AMXX }
)

# The csstats.dat reader is Windows-only.
if builder.target_platform == 'windows':
  builder.RunScript('modules/cstrike/csx/WinCSX/AMBuilder', { 'AMXX': AMXX })

if builder.backend == 'amb2':
  builder.RunBuildScripts([
      'plugins/AMBuilder',
      'support/PackageScript',
    ],
    { 'AMXX': AMXX }
  )