import numpy as np
import galsim
import copy
import cmath

from astropy.table import Table
from abc import abstractmethod, ABCMeta
from ObservationSim.MockObject._util import integrate_sed_bandpass, getNormFactorForSpecWithABMAG, getABMAG


class CatalogBase(metaclass=ABCMeta):
    def __init__(self):
        pass

    @abstractmethod
    def load_sed(self, obj, **kward):
        pass

    @abstractmethod
    def _load(self, **kward):
        pass

    @abstractmethod
    def load_norm_filt(self, obj):
        return None

    @staticmethod
    def initialize_param():
        param = {
            "star": -1,
            "id": -1,
            "ra": 0,
            "dec": 0.,
            "ra_orig": 0.,
            "dec_orig": 0.,
            "z": 0.,
            "sed_type": -1,
            "model_tag": "unknown",
            "mag_use_normal": 100.,
            "theta": 0.,
            "kappa": 0.,
            "g1": 0.,
            "g2": 0.,
            "bfrac": 0.,
            "av": 0.,
            "redden": 0.,
            "hlr_bulge": 0.,
            "hlr_disk": 0.,
            "ell_bulge": 0.,
            "ell_disk": 0.,
            "ell_tot": 0.,
            "e1_disk": 0.,
            "e2_disk": 0.,
            "e1_bulge": 0.,
            "e2_bulge": 0.,
            "teff": 0.,
            "logg": 0.,
            "feh": 0.,
            "DM": 0.,
            "stellarMass": 1.,
            # C6 galaxies parameters
            "e1": 0.,
            "e2": 0.,
            "bulgemass": 0.,
            "diskmass": 0.,
            "size": 0.,
            "detA": 1.,
            "type": 0,
            "veldisp": 0.,
            "coeff": np.zeros(20),
            # Astrometry related
            "pmra": 0.,
            "pmdec": 0.,
            "rv": 0.,
            "parallax": 1e-9
        }
        return param

    @staticmethod
    def rotate_ellipticity(e1, e2, rotation=0., unit='radians'):
        if unit == 'degree':
            rotation = np.radians(rotation)
        e_total = np.sqrt(e1**2 + e2**2)
        phi = cmath.phase(complex(e1, e2))
        e1 = e_total * np.cos(phi + 2*rotation)
        e2 = e_total * np.sin(phi + 2*rotation)
        return e1, e2, e_total

    @staticmethod
    def convert_sed(mag, sed, target_filt, norm_filt=None, mu=1.):
        bandpass = target_filt.bandpass_full

        if norm_filt is not None:
            norm_thr_rang_ids = norm_filt['SENSITIVITY'] > 0.001
        else:
            norm_filt = Table(
                np.array(np.array([bandpass.wave_list*10.0, bandpass.func(
                    bandpass.wave_list)])).T, names=(['WAVELENGTH', 'SENSITIVITY'])
            )
            norm_thr_rang_ids = norm_filt['SENSITIVITY'] > 0.001

        sedNormFactor = getNormFactorForSpecWithABMAG(ABMag=mag,
                                                      spectrum=sed,
                                                      norm_thr=norm_filt,
                                                      sWave=np.floor(
                                                          norm_filt[norm_thr_rang_ids][0][0]),
                                                      eWave=np.ceil(norm_filt[norm_thr_rang_ids][-1][0]))
        sed_photon = copy.copy(sed)
        sed_photon = np.array(
            [sed_photon['WAVELENGTH'], sed_photon['FLUX']*sedNormFactor]).T
        sed_photon = galsim.LookupTable(x=np.array(sed_photon[:, 0]), f=np.array(
            sed_photon[:, 1] * mu), interpolant='nearest')
        # Get magnitude
        sed_photon = galsim.SED(sed_photon, wave_type='A',
                                flux_type='1', fast=False)
        interFlux = integrate_sed_bandpass(sed=sed_photon, bandpass=bandpass)
        mag_csst = getABMAG(
            interFlux=interFlux,
            bandpass=bandpass
        )
        if target_filt.survey_type == "photometric":
            return sed_photon, mag_csst, interFlux
        elif target_filt.survey_type == "spectroscopic":
            del sed_photon
            return sed, mag_csst, interFlux