#!/usr/bin/env python

"""
API for clm's configure
"""

from CIME.XML.standard_module_setup import *
from CIME.utils import run_cmd_no_fail, expect

import glob, shutil
logger = logging.getLogger(__name__)

def buildcpp(case):
    """
    Invoke clm configure ONLY for clm4_0 - output goes in `caseroot`/Buildconf/camconf
    """

    caseroot = case.get_value("CASEROOT")
    cimeroot = case.get_value("CIMEROOT")
    lnd_root = case.get_value("COMP_ROOT_DIR_LND")
    lnd_grid = case.get_value("LND_GRID")
    mask_grid = case.get_value("MASK_GRID")
    clm_usrdat_name = case.get_value("CLM_USRDAT_NAME")
    clm_config_opts = case.get_value("CLM_CONFIG_OPTS")
    compset = case.get_value("COMPSET")

    if mask_grid == "reg" and lnd_grid != "CLM_USRDAT":
        config_opts = "-sitespf_pt $lnd_grid"
    else:
        config_opts = ""

    if "1PT" in compset:
        config_opts = " -sitespf_pt reg"

    clmconf = os.path.join(caseroot, "Buildconf", "clmconf")
    if not os.path.isdir(clmconf):
        os.makedirs(clmconf)

    cmd = os.path.join(lnd_root,"bld","configure")
    command = "%s -cimeroot %s %s %s -usr_src %s -comp_intf mct "  \
              %(cmd, cimeroot, config_opts, clm_config_opts, os.path.join(caseroot,"SourceMods","src.clm")) 

    run_cmd_no_fail(command, from_dir=clmconf)

    # determine cppdefs - caseroot/clmconf/CESM_cppdefs is created by the call to configure
    with open(os.path.join(clmconf, "CESM_cppdefs"), 'r') as f:
        user_cppdefs = f.readline().rstrip()
    if user_cppdefs:
        case.set_value("CLM_CPPDEFS", user_cppdefs)
        case.flush()

    return user_cppdefs