#!/usr/bin/env python3
#
# To launch this agent from the root of Pyros:
# cd /srv/develop/pyros
# .\PYROS -t start AgentImagesProcessor -o tnc -fg
#
# ---------------------------------------------------

import sys
import time
import argparse
import os
pwd = os.environ['PROJECT_ROOT_PATH']
if pwd not in sys.path:
    sys.path.append(pwd)

short_paths = ['src', 'src/core/pyros_django']
for short_path in short_paths:
    path = os.path.join(pwd, short_path)
    if path not in sys.path:
        sys.path.insert(0, path)

from src.core.pyros_django.agent.Agent import Agent, build_agent, log, parse_args

# = Specials
import glob
import shutil
import guitastro

class AgentImagesProcessor(Agent):

    # - All possible running states
    RUNNING_NOTHING = 0
    RUNNING_ONE_IMAGE_PROCESSING = 1
    RUNNING_COMPUTE_RON_GAIN = 2

    # TODO: Redefine valid timeout
    _AGENT_SPECIFIC_COMMANDS = {
        # Format : “cmd_name” : (timeout, exec_mode)
        
        "do_create_test_images_1" : (60, Agent.EXEC_MODE.SEQUENTIAL, ''),
        "do_create_test_images_2" : (60, Agent.EXEC_MODE.SEQUENTIAL, ''),
        "do_stop_current_processing" : (60, Agent.EXEC_MODE.SEQUENTIAL, ''),
    }    

    # Scenario to be executed
    # "self do_stop_current_processing"
    # AgentCmd.CMD_STATUS_CODE.CMD_EXECUTED
    _TEST_COMMANDS_LIST = [
        # Format : ("self cmd_name cmd_args", timeout, "expected_result", expected_status),
        (True, "self do_create_test_images_1", 200, '', Agent.CMD_STATUS.CMD_EXECUTED),
        (True, "self do_stop asap", 500, "STOPPING", Agent.CMD_STATUS.CMD_EXECUTED),
    ]

    """
    =================================================================
        Methods running inside main thread
    =================================================================
    """

    def __init__(self, name:str=None,simulated_computer=None):
        if name is None:
            name = self.__class__.__name__
        super().__init__(simulated_computer=simulated_computer)

    def _init(self):
        super()._init()
        log.debug("end super init()")
        log.info(f"self.TEST_MODE = {self.TEST_MODE}")

        # === Get config infos
        agent_alias = self.name
        log.info(f"agent_alias = {agent_alias}")
        # === Get the config object
        self.config = self._oc['config']
        # === Get self._path_data_root
        self._path_data_root = self.config.get_agent_path_data_root(agent_alias)
        # === Get self._home of current unit
        self._home = self.config.getHome()
        # === Get self._paths the directories for all data (images). See obsconfig_class.py to know keys
        self._paths = self.config.get_agent_path_data_tree(agent_alias, True)

        # === Instanciate an object Ima to make image processing
        self._ima = guitastro.Ima()
        home = guitastro.Home(self._home)

        # === Instanciate an object Filenames to manage file names
        self._filename_manager = guitastro.FileNames()
        self._filename_manager.naming("PyROS.1")

        # === Set longitude to ima object to generate the night yyyymmdd and subdirectories yyyy/mm/dd
        longitude = home.longitude
        log.info(f"Longitude={longitude}")
        self._ima.longitude(longitude)
        log.info("Init done with success")

        # === Status of routine processing
        self._routine_running = self.RUNNING_NOTHING
        log.debug("end init()")

    # Note : called by _routine_process() in Agent
    # @override
    def _routine_process_iter_start_body(self):
        log.debug("in routine_process_before_body()")

    # Note : called by _routine_process() in Agent
    # @override
    def _routine_process_iter_end_body(self):
        log.debug("in routine_process_after_body()")
        if self._routine_running == self.RUNNING_NOTHING:
            # Get files to process
            fitsfiles = self.glob_images_to_process()
            n = len(fitsfiles)
            log.info(f"There are {n} image{self._plural(n)} to process")
            if n > 0:
                # - We select the oldest image
                fitsfile = fitsfiles[0]
                log.info(f"Process the file {fitsfile}")
                # - Thread TODO
                self._routine_running = self.RUNNING_ONE_IMAGE_PROCESSING
                self.process_one_image(fitsfile)

    """
    =================================================================
        Methods of specific commands
    =================================================================
    """

    def do_stop_current_processing(self):
        pass

    def do_create_test_images_1(self):
        self._create_test_images_1()

    def do_create_test_images_2(self):
        self._create_test_images_2()

    """
    =================================================================
        Methods called by commands or routine. Overload these methods
    =================================================================
    """

    def glob_images_to_process(self):

        # - glob the incoming directory:
        fitsfiles = glob.glob(f"{self._paths['ima_incoming']}/*.fit")
        # - Please sort list of files in increasing dates (TODO)
        return fitsfiles

    def bias_correction(self):

        # - Search the bias
        path_bias = os.path.join( self._paths['ima_bias'], self._date_night )
        fitsbiasfiles = glob.glob(f"{path_bias}/*.fit")
        log.info(f"fitsbiasfiles = {fitsbiasfiles}")
        if len(fitsbiasfiles) > 0:

            # - Select the bias
            pass

    def dark_correction(self):

        # - Search the dark
        path_darks = os.path.join( self._paths['ima_darks'], self._date_night )
        fitsdarkfiles = glob.glob(f"{path_darks}/*.fit")
        log.info(f"fitsdarkfiles = {fitsdarkfiles}")
        if len(fitsdarkfiles) > 0:

            # - Select two darks and compute the therm using exposure
            # - Correction of dark
            pass

    def flat_correction(self):

        # - Search the flat
        path_flats = os.path.join( self._paths['ima_flats'], self._date_night )
        fitsflatfiles = glob.glob(f"{path_flats}/*.fit")
        log.info(f"fitsflatfiles = {fitsflatfiles}")
        if len(fitsflatfiles) > 0:

            # - Select the flat (with the filter)
            # - Correction of flat
            pass

    def inversion_correction(self):
        pass

    def cosmetic_correction(self):
        pass

    def wcs_calibration(self):
        return 0

    def process_one_image(self, fitsfile: str):
        """This is the general algorithm of processing

        The processing consists to make corrections of dark, flat, inversions, cosmetic
        and perform WCS calibration.

        Args:
            fitsfile: The file of the FITS file to process.

        """

        # - Load file in memory
        log.info("Load the file in memory")
        #self.set_infos("Load the file in memory")
        f = self._ima.genename(self._ima.load(fitsfile))
        # log.info(f"f={f}")

        # - Save as tmp
        self._ima.path(self._paths['ima_tmp'])
        log.info("Save the temporary file as tmp name")
        self._ima.save("tmp")

        # - Load tmp and get infos
        self._ima.load("tmp")
        date_obs = self._ima.getkwd("DATE-OBS")
        self._date_night = self._ima.get_night(date_obs)
        log.info(f"Date_obs = {date_obs}")
        log.info(f"Night = {self._date_night}")
        exposure = self._ima.getkwd("EXPOSURE")
        log.info(f"Exposure = {exposure}")

        # - Bias correction
        self.bias_correction()

        # - Dark correction
        self.dark_correction()

        # - Flat correction
        self.flat_correction()

        # - Save tmp corrected by dark and flat
        self._ima.path(self._paths['ima_tmp'])
        self._ima.save("tmp")

        # - Inversion of mirrors or mirorxy
        self.inversion_correction()

        # - Cosmetic correction
        self.cosmetic_correction()

        # - WCS calibration
        nmatched = self.wcs_calibration()

        # - Prepare the output file name
        log.info("Decode the filename")
        fgen_in = f['genename'] + f['sep'] + f['indexes'][0] + f['suffix']
        fext_in = f['file_extension']
        fext_out = ".fits"

        # - Save in processed
        yyyy = self._date_night[0:4]
        mm = self._date_night[4:6]
        dd = self._date_night[6:8]
        path_processed = os.path.join( self._paths['ima_processed'], yyyy, mm, dd )
        self._ima.path(path_processed)
        fname_out = fgen_in + fext_out
        fname = self._ima.save(fname_out)
        log.info(f"Save the processed image {fname}")

        # - Delete the file in incoming directory
        os.remove(fitsfile)
        log.info(f"Delete the raw image {fitsfile}")

        # - Update the running state
        self._routine_running = self.RUNNING_NOTHING

        time.sleep(5)
        print("\n ...End of image calibration\n")

    """
    =================================================================
        Internal methods
    =================================================================
    """

    def _create_test_images_1(self):
        try:
            # === Define an image to test the processing and copy it in incoming directory
            self._file_ima_test = os.path.join(self._path_data_root,"vendor/guitastro/tests/data/m57.fit")
            file_in = self._file_ima_test
            file_out = f"{self._paths['ima_incoming']}/m57.fit"
            shutil.copyfile(file_in, file_out)
            self._filename_manager.naming("")
        except:
            raise

    def _create_test_images_2(self):
        try:
            self._ima.etc.camera("Kepler 4040")
            self._ima.etc.optics("Takahashi_180ED")
            self._ima.etc.params("msky",18)
            ra = 132.84583
            dec = 11.81333
            at = self._ima.simulation("GAIA", "PHOTOM", shutter_mode="closed", t=50, ra=ra, dec=dec)
            file_out = os.path.join(self._paths['ima_tmp'], "m67.ecsv")
            print(f"STEP TOTO 1 = {at}")
            at.t.write(file_out, format='astrotable', overwrite=True)
            print(f"STEP TOTO 2")
            date_obs = self.getkwd("DATE-OBS")
        except:
            raise

    def _plural(self, n: int) -> str:
        """Return "s" if n>1 for plurals.

        Args:
            n: Number of entities

        Returns:
            The string "s" or ""
        """
        if n > 1:
            s = "s"
        else:
            s = ""
        return s

if __name__ == "__main__":
    args =  parse_args(sys.argv[1:])    
    #args = vars(parser.parse_args())
    agent = build_agent(AgentImagesProcessor,param_constr=args)
    print(agent)
    agent.run()