#!/usr/Local/pyroot/PyTangoRoot/bin/python
"""
Command Line Interface to  use ArchiveExtractor module
"""
import argparse
import core.ArchiveExtractor as AE
import logging
import datetime
import numpy as np
import PyTango as tango

# Name the logger after the filename
logger = logging.getLogger("ArchiveExtractor")

# Default stop date
dateStop = datetime.datetime.now()

# Default start date
dateStart = datetime.datetime.now()-datetime.timedelta(days=1)

#######################################################
# Install argument parser

parser = argparse.ArgumentParser(description="Extract attributes from the extractor devices.\nVersion %s"%AE.__version__)

parser.add_argument("--from", type=AE.ArchiveExtractor.dateparse, dest="dateStart",
    help="Start date for extraction, format '1990-12-13-22:33:45'. "+
    "It is possible to be less precise and drop, seconds, minutes, hours or even day."+
    " Default is one day ago",
    default=dateStart)

parser.add_argument("--to", type=AE.ArchiveExtractor.dateparse, dest="dateStop",
    help="Stop date for extraction, format '1990-12-13-22:33:45'. It is possible to be less precise and drop, seconds, minutes, hours or even day."+
    " Default is now.",
    default=dateStop)

parser.add_argument("--DB", choices=["H", "T", "L"],
    default="T", help="Database to extract from. HDB (H) or TDB (T), default: %(default)s")

parser.add_argument("--DBN", type=int, default=2,
        help="Extractor device number, default: %(default)s")

parser.add_argument("--fileout", type=str, default="extracted_%s.npy"%datetime.datetime.now().strftime("%Y%m%d_%H%M%S"),
        help="filename of the extraction destination. Default: %(default)s"),

parser.add_argument('--log', type=str, default="INFO",
        help="Log level. Default: %(default)s.")


parser.add_argument('--filemode', action="store_true",
        help="Set attribute to filemode."+
        " Instead of specifying attributes, put a path to a file containing a list of attributes."+
        " The file contains one attribute per line.")

parser.add_argument('attributes', type=str, nargs='+',
                    help="List of attributes to extract. Full tango path.")

args = parser.parse_args()


#######################################################
# Configure logger

# Add a stream handler
s_handler = logging.StreamHandler()
s_handler.setFormatter(logging.Formatter("%(levelname)s\t[%(funcName)s] \t%(message)s"))

# Set level according to command line attribute
s_handler.setLevel(level=getattr(logging, args.log.upper()))
logger.setLevel(level=getattr(logging, args.log.upper()))
logger.addHandler(s_handler)

logger.debug("Parsed arguments: %s"%args)

logger.info("Archive Extractor %s"%AE.__version__)

#######################################################
# Filemode or not
if args.filemode:
    logger.info("Filemode, openning file %s"%args.attributes[0])
    # Read the file. Each line is an attribute
    with open(args.attributes[0], "r") as fp:
        attributes = fp.readlines()

    logger.debug("Read lines : %s"%attributes)

    # Clean end of line
    for i_a in range(len(attributes)):
        attributes[i_a] = attributes[i_a].rstrip()

else:
    attributes = args.attributes

#######################################################
# Instanciate Extractor
if args.DB == "L":
    AE  =  AE.ArchiveExtractor(extractorPath="archiving/extractor/%d"%(args.DBN), logger=logger)
else:
    AE  =  AE.ArchiveExtractor(args.DB, args.DBN, logger=logger)

#######################################################
# Prepare dictionnary for result
results = dict()

#######################################################
# Extract from database
for attr in attributes:
    logger.info("Extracting attribute %s..."%attr)
    logger.info("Extract from %s to %s."%(args.dateStart, args.dateStop))

    for attempt in range(3):
        try:
            datevalue = AE.betweenDates(attr, args.dateStart, args.dateStop)

            # Add to result dictionnary
            results[attr] = datevalue

        except ValueError as e:
            logger.debug("ErrorMsg: %s"%e)
            logger.warning("Failed to extract %s. Skipping..."%attr)
        except (tango.CommunicationFailed, tango.DevFailed) as e:
            # retry
            logger.debug("ErrorMsg: %s"%e)
            logger.warning("Failed to extract %s. Retry..."%attr)
        break

    else:
        logger.error("The device %s might have crash.\n"%extractor+
                "You should check with Jive and probably restart with Astor.\n")

    # Save all at each step
    np.save(args.fileout, results)

logger.info("Extraction done, saved in file %s"%args.fileout)