"""Minimal Python Module"""
from buildutils import *

Import('env', 'build', 'install')

localenv = env.Clone()

make_setup = build(localenv.SubstFile('setup.py', 'setup.py.in'))

# copy scripts from the full Cython module
for script in ['ctml_writer', 'ck2cti']:
    # The actual script
    s = build(env.Command('cantera/{}.py'.format(script),
                          '#interfaces/cython/cantera/{}.py'.format(script),
                          Copy('$TARGET', '$SOURCE')))
    localenv.Depends(make_setup, s)

build_cmd = ('cd interfaces/python_minimal &&'
             ' $python_cmd_esc setup.py build --build-lib=../../build/python')

mod = build(localenv.Command('#build/python/cantera/__init__.py', 'setup.py',
                             build_cmd))
env['python_module'] = mod

if localenv['PYTHON_INSTALLER'] == 'direct':
    if localenv['python_prefix'] == 'USER':
        # Install to the OS-dependent user site-packages directory
        extra = '--user'
        if localenv['OS'] == 'Darwin':
            extra += ' --prefix=""'
    elif localenv['python_prefix']:
        # A specific location for the Cantera python module has been given
        extra = '--user'
        if localenv['OS'] == 'Darwin':
            extra += ' --prefix=""'
        localenv.AppendENVPath(
            'PYTHONUSERBASE',
            normpath(localenv.subst('$python_prefix'))
        )
    else:
        # Install Python module in the default location
        extra = ''
    mod_inst = install(localenv.Command, 'dummy', mod,
                       build_cmd + ' install ' + extra +
                       ' --record=../../build/python-installed-files.txt' +
                       ' --single-version-externally-managed')
    global_env = env
    def find_module_dir(target, source, env):
        check = pjoin('cantera', '__init__.py')
        for filename in open('build/python-installed-files.txt').readlines():
            filename = filename.strip()
            if filename.endswith(check):
                filename = filename.replace(check, '')
                global_env['python_module_loc'] = normpath(filename)
                break
    localenv.AlwaysBuild(localenv.AddPostAction(mod_inst, find_module_dir))
    env['install_python_action'] = mod_inst
