#!/usr/bin/env python3
############################################################
# Program is part of MintPy                                #
# Copyright (c) 2013, Zhang Yunjun, Heresh Fattahi         #
# Author: Antonio Valentino, Zhang Yunjun, Aug 2022        #
############################################################


import os
import sys

from mintpy.defaults.template import get_template_content
from mintpy.utils.arg_utils import create_argument_parser

###############################################################
TEMPLATE = get_template_content('correct_SET')

REFERENCE = """reference:
  Milbert, D. (2018), "solid: Solid Earth Tide", [Online]. Available: http://geodesyworld.github.io/
    SOFTS/solid.htm. Accessd on: 2020-09-06.
  Yunjun, Z., Fattahi, H., Pi, X., Rosen, P., Simons, M., Agram, P., & Aoki, Y. (2022). Range
    Geolocation Accuracy of C-/L-band SAR and its Implications for Operational Stack Coregistration.
    IEEE Trans. Geosci. Remote Sens., 60, doi:10.1109/TGRS.2022.3168509.
"""

EXAMPLE = """example:
  solid_earth_tides.py timeseries.h5 -g inputs/geometryGeo.h5
  solid_earth_tides.py timeseries.h5 -g inputs/geometryRadar.h5
  solid_earth_tides.py timeseries.h5 -g inputs/geometryRadar.h5 --comp en2az
  solid_earth_tides.py date_list.txt -g inputs/geometryRadar.h5 --comp en2az
"""

def create_parser(subparsers=None):
    synopsis = 'Solid Earth tides (SET) correction via PySolid'
    epilog = REFERENCE + '\n' + TEMPLATE + '\n' + EXAMPLE
    name = __name__.split('.')[-1]
    parser = create_argument_parser(
        name, synopsis=synopsis, description=synopsis, epilog=epilog, subparsers=subparsers)

    parser.add_argument('dis_file', type=str,
                        help='timeseries HDF5 file, e.g., timeseries.h5.\n'
                             'Or date list text file, e.g., info.py inputs/ERA5.py --date > date_list.txt')
    parser.add_argument('-g','--geomtry', dest='geom_file', type=str, required=True,
                        help='geometry file including incidence/azimuthAngle.')
    parser.add_argument('--date-wise-acq-time', dest='date_wise_acq_time', action='store_true',
                        help='Use the exact date-wise acquisition time instead of the common one for tides calculation.\n' +
                             'For ISCE-2/topsStack products only, and requires ../reference and ../secondarys folder.\n' +
                             'There is <1 min difference btw. S1A/B -> Negligible impact for InSAR.')
    parser.add_argument('--comp', dest='set_comp', choices={'enu2los', 'en2az'}, default='enu2los',
                        help='Convert the ENU components into the component of interest for radar (default: %(default)s).')

    parser.add_argument('--verbose', dest='verbose', action='store_true', help='Verbose message.')
    parser.add_argument('--update', dest='update_mode', action='store_true', help='Enable update mode.')

    # output
    parser.add_argument('--set-file', dest='set_file', help='line-of-sight solid earth tide file name')
    parser.add_argument('-o', dest='cor_dis_file', help='Output file name for the corrected timeseries.')

    return parser


def cmd_line_parse(iargs=None):
    """Command line parser."""
    # parse
    parser = create_parser()
    inps = parser.parse_args(args=iargs)

    # import
    from mintpy.utils import readfile

    # check
    if inps.dis_file.endswith('.h5'):
        atr1 = readfile.read_attribute(inps.dis_file)
        atr2 = readfile.read_attribute(inps.geom_file)
        coord1 = 'geo' if 'Y_FIRST' in atr1.keys() else 'radar'
        coord2 = 'geo' if 'Y_FIRST' in atr2.keys() else 'radar'
        proc = atr1.get('PROCESSOR', 'isce')

        # check: metadata (coordinates + processors) - radar coord is NOT supported for gamma / roipac
        if coord1 == 'radar' and proc in ['gamma', 'roipac']:
            msg = f'Radar-coded file from {proc} is NOT supported!'
            msg += '\n    Try to geocode the time-series & geometry files and re-run with them instead.'
            raise ValueError(msg)

        # check: coordinates between time-series and geometry (consistency is required)
        if coord1 != coord2:
            n = max(len(os.path.basename(i)) for i in [inps.dis_file, inps.geom_file])
            msg = 'Input time-series and geometry file are NOT in the same coordinate!'
            msg += f'\n    file {os.path.basename(inps.dis_file):<{n}} coordinate: {coord1}'
            msg += f'\n    file {os.path.basename(inps.geom_file):<{n}} coordinate: {coord2}'
            raise ValueError(msg)

    # default: output SET file name
    if not inps.set_file:
        geom_dir = os.path.dirname(inps.geom_file)
        inps.set_file = os.path.join(geom_dir, 'SET.h5')

        if inps.set_comp.endswith('2az'):
            inps.set_file = os.path.join(geom_dir, 'SETaz.h5')

    # default: output corrected time-series file name
    if not inps.cor_dis_file:
        dis_dir = os.path.dirname(inps.dis_file)
        fbase, fext = os.path.splitext(os.path.basename(inps.dis_file))
        inps.cor_dis_file = os.path.join(dis_dir, f'{fbase}_SET{fext}')

    return inps


###############################################################
def main(iargs=None):
    # parse
    inps = cmd_line_parse(iargs)

    # import
    from mintpy.solid_earth_tides import run_solid_earth_tides

    # run
    run_solid_earth_tides(inps)


###############################################################
if __name__ == '__main__':
    main(sys.argv[1:])