from buildutils import *

Import('env', 'build', 'install', 'libraryTargets')
localenv = env.Clone()


def prep_default(env):
    return env.Clone()


def prep_fortran(env):
    localenv = env.Clone()
    localenv.Prepend(CPPPATH='#include/cantera/base')  # for config.h
    return localenv


def prep_f2c(env):
    localenv = env.Clone()

    localenv.Prepend(CPPPATH=Dir('#ext/f2c_libs'))
    if not localenv['HAS_TIMES_H']:
        localenv.Append(CPPDEFINES=['USE_CLOCK'])
    if not localenv['HAS_UNISTD_H']:
        localenv.Append(CPPDEFINES=['MSDOS'])
        if env['VERBOSE']:
            print "INFO 2:    prep_f2c: adding MSDOS to CPPDEFINES"
            print "INFO 2:     CPPDEFINES     ", localenv['CPPDEFINES']

    # The F2C code generates a lot of warnings designed to catch
    # programmer errors, but since this is autogenerated code, those
    # warnings are irrelevant.
    if '-Wall' in localenv['CCFLAGS']:
        localenv['CCFLAGS'].remove('-Wall')
        localenv['CCFLAGS'].append('-Wno-format-security')
    elif '/W3' in localenv['CCFLAGS']:
        localenv['CCFLAGS'].remove('/W3')
    elif '-Wcheck' in localenv['CCFLAGS']:
        localenv['CCFLAGS'].remove('-Wcheck')
    if localenv['CC'] == 'clang':
        localenv['CCFLAGS'].append('-w')

    return localenv


def prep_sundials(env):
    localenv = env.Clone()
    localenv.Prepend(CPPPATH=Dir('#ext/cvode/include'))

    # Suppress warnings from external code
    if '-Wall' in localenv['CCFLAGS']:
        localenv['CCFLAGS'].append('-Wno-format')

    return localenv


def prep_gtest(env):
    localenv = env.Clone()
    localenv.Prepend(CPPPATH=[Dir('#ext/gtest'),
                              Dir('#ext/gtest/include')],
                    CPPDEFINES={'GTEST_HAS_PTHREAD': 0})
    return localenv

# libs is a list of length 3
#     0 subdir for execution
#     1 file extension
#     2 function pointer
# (subdir, (file extensions), prepfunction)
libs = [('libexecstream', ['cpp'], prep_default)]

if env['build_with_f2c']:
    libs.append(('f2c_math', ['cpp','c'], prep_f2c))

    # Create arith.h using the arithchk program
    if not os.path.exists('arith.h'):
        arithenv = prep_f2c(env)

        # TODO: make link flag more general
        arithenv.Append(CPPFLAGS='-DNO_FPINIT')
        arithenv.Program('f2c_libs/arithchk/arithchk', source='f2c_libs/arithchk/arithchk.c',
                         LIBS=env['LIBM'])
        arithenv.Command('#ext/f2c_libs/arith.h', 'f2c_libs/arithchk/arithchk$PROGSUFFIX',
                         '$SOURCE > $TARGET')

    headerenv = prep_f2c(env)
    # Possibly system-dependent headers
    headerenv.Command('#ext/f2c_libs/signal1.h', 'f2c_libs/signal1.h0',
                      Copy('$TARGET', '$SOURCE'))

    headerenv.Command('#ext/f2c_libs/sysdep1.h', 'f2c_libs/sysdep1.h0',
                      Copy('$TARGET', '$SOURCE'))

    libs.append(('f2c_libs', 'c', prep_f2c))

    if env['BUILD_BLAS_LAPACK']:
        libs.append(('f2c_blas', ['c'], prep_f2c))
        libs.append(('f2c_lapack', ['c'], prep_f2c))

else:
    libs.append(('math', ['cpp','c','f'], prep_fortran))

    if env['BUILD_BLAS_LAPACK']:
        libs.append(('blas', ['f'], prep_default))
        libs.append(('lapack', ['f'], prep_default))

if env['use_sundials'] == 'n':
    libs.append(('cvode/source', ['c'], prep_sundials))


for subdir, extensions, prepFunction in libs:

    if env['VERBOSE']:
        print 'INFO 2: Prep the environment for ', subdir,
        print ' with extensions ', extensions,
        print ' by calling func ', prepFunction.__name__

    localenv = prepFunction(env)

    if localenv['single_library']:
        objects = localenv.SharedObject(mglob(localenv, subdir, *extensions))
        libraryTargets.extend(objects)
    else:
        libName = 'ct' + subdir
        if libName == 'ctf2c_blas':
            libName = 'ctblas'
        if libName == 'ctf2c_lapack':
            libName = 'ctlapack'
        if libName == 'ctf2c_math':
            libName = 'ctmath'
        if libName == 'ctcvode/source':
            libName = 'cvode'
        if libName == 'ctlibexecstream':
            libName = 'execstream'
        if libName == 'ctf2c_libs':
            libName = 'ctf2c'

        if localenv['renamed_shared_libraries']:
            sharedLibName = libName + '_shared'
        else:
            sharedLibName = libName

        if env['VERBOSE']:
            print "INFO 2:", subdir, ' with ', extensions
            print "        libName = ", libName, " sharedLibName = ", sharedLibName

        objects = localenv.SharedObject(mglob(localenv, subdir, *extensions))

        # Build the static library
        lib = build(localenv.StaticLibrary(pjoin('..', 'lib', libName), objects))
        install('$inst_libdir', lib)

        # Build the shared library
        liby = build(localenv.SharedLibrary(pjoin('..', 'lib', sharedLibName), objects))
        install('$inst_libdir', liby)

# Google Test: Used internally for Cantera unit tests. Optionally, the headers
# and compiled library can be installed alongside Cantera using the scons
# option 'install_gtest=y'.
localenv = env.Clone()
localenv.Prepend(CPPPATH=[Dir('#ext/gtest'),
                          Dir('#ext/gtest/include')],
                 CPPDEFINES={'GTEST_HAS_PTHREAD': 0})

gtest = build(localenv.Library(pjoin('../lib', 'gtest'),
                              source=['gtest/src/gtest-all.cc']))

if localenv['install_gtest']:
    # install the static library
    install('$inst_libdir', gtest)

    # install the header files
    install(localenv.RecursiveInstall, '$inst_incroot', '#/ext/gtest/include')