#! /usr/bin/env python3
"""
Script to rename and upload NEON site finidat files for use in transient startup cases

"""

import os, sys
# Get the ctsm util tools and then the cime tools.
_CTSM_PYTHON = os.path.abspath(os.path.join(os.path.dirname(__file__), "..","..",'python'))
sys.path.insert(1, _CTSM_PYTHON)

from google.cloud import storage
import glob
import datetime
from ctsm                  import add_cime_to_path
from ctsm.path_utils       import path_to_ctsm_root
from standard_script_setup import *
from CIME.case             import Case
from CIME.utils            import expect, safe_copy

logger = logging.getLogger(__name__) 

def get_parser(args, description, valid_neon_sites):
    """
    Get Parser object for this script
    """
    parser = argparse.ArgumentParser(description=description,
                           formatter_class=argparse.RawDescriptionHelpFormatter)

    CIME.utils.setup_standard_logging_options(parser)
    
    parser.print_usage = parser.print_help

    parser.add_argument('--neon-sites',
                        help='4-letter neon site code.', 
                        action="store",
                        required=False,
                        choices=valid_neon_sites + ['all'],
                        dest="neon_sites",
                        default=["OSBS"],
                        nargs='+')

    parser.add_argument('--output-root',
                help='''
                Root Directory of case results
                [default: %(default)s] 
                ''',
                action="store", 
                dest="output_root",
                type =str,
                required=False,
                        default=os.getcwd())

    parser.add_argument('--file-date',
                        help='''
                        Date of ctsm restart file(s) to upload
                        ''',
                        action="store", 
                        dest="file_date",        
                        required = False,
                        type = datetime.date.fromisoformat,
                        default = datetime.datetime.strptime("0318-01-01",'%Y-%m-%d'))


    parser.add_argument('--upload-finidat',
                        help='''
                        Upload the final restart files from the end of the postad run for each site.
                        ''',
                        action="store_true",
                        dest="upload_finidat",
                        required = False,
                        default = False)

    parser.add_argument('--upload-history',
                        help='''
                        Upload the transient run h1 history files for each site.
                        ''',
                        action="store_true",
                        dest="upload_history",
                        required = False,
                        default = False)



    args = CIME.utils.parse_args_and_handle_standard_logging_options(args, parser)

    if 'all' in args.neon_sites:
        neon_sites = valid_neon_sites
    else:
        neon_sites = args.neon_sites
        for site in neon_sites:
            if site not in valid_neon_sites:
                raise ValueError("Invalid site name {}".format(site))

    expect(args.upload_finidat or args.upload_history,"Must specify at least one of --upload-finidat or --upload-history")

    return neon_sites, args.output_root, args.file_date, args.upload_finidat, args.upload_history

def upload_blob(bucket_name, source_file_name, destination_blob_name):
    """Uploads a file to the bucket."""
    # The ID of your GCS bucket
    # bucket_name = "your-bucket-name"
    # The path to your file to upload
    # source_file_name = "local/path/to/file"
    # The ID of your GCS object
    # destination_blob_name = "storage-object-name"

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)
    blob = bucket.blob(destination_blob_name)

    blob.upload_from_filename(source_file_name)

    print(
        f"File {source_file_name} uploaded to {destination_blob_name}."
    )

def main(description):
    """
    For each site in the site_list find the site.postad run directory and grab the latest clm restart file
    from there, 
    """

    cesmroot = path_to_ctsm_root()
    os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = os.path.join(os.environ["HOME"],'.uploadGCSkey.json')
    #os.path.join(os.environ["HOME"],"gcwriter")

    # Get the list of supported neon sites from usermods
    valid_neon_sites = glob.glob(os.path.join(cesmroot,"cime_config","usermods_dirs","NEON","[!d]*"))
    valid_neon_sites = [v.split('/')[-1] for v in valid_neon_sites]
    filedatestamp = datetime.datetime.now().date()
    site_list, output_root, file_date, upload_finidat, upload_history = get_parser(sys.argv, description, valid_neon_sites)
    for site in site_list:
        rundir = None
        if upload_finidat:
            logger.info("Upload finidat for {}".format(site))
            case_path = os.path.join(output_root, site+".postad")
            if os.path.isdir(case_path):
                with Case(case_path) as case:
                    rundir = case.get_value("RUNDIR")
                    basefile = site+".postad.clm2.r.{}-00000.nc".format(file_date.strftime("%4Y-%m-%d"))
                    finidat_file = os.path.join(rundir,basefile)
                    if not os.path.isfile(finidat_file):
                        logger.warning("Could not find file {}".format(finidat_file))
                        continue
                    newfile = basefile.replace(".postad.",".{}.".format(filedatestamp))
                    upload_blob("neon-ncar-artifacts", finidat_file, os.path.join("NEON","lnd","ctsm","initdata",newfile) )
                
        if upload_history:
            logger.info("Upload history for {}".format(site))
            case_path = os.path.join(output_root, site+".transient")
            if not os.path.isdir(case_path):
                logger.warning("No case found in {}".format(case_path))
                continue
            with Case(case_path) as case:
                archive_dir = os.path.join(case.get_value("DOUT_S_ROOT"),"lnd","hist")
                for histfile in glob.iglob(archive_dir + "/*.h1.*"):
                    newfile = os.path.basename(histfile)
                    upload_blob("neon-ncar-artifacts", histfile, os.path.join("NEON","archive",site,"lnd","hist",newfile))
                        
                




if __name__ == "__main__":
    main(__doc__)