# ***************************************************************************
# *   Copyright (c) 2021 Bernd Hahnebach <bernd@bimstatik.org>              *
# *                                                                         *
# *   This file is part of the FreeCAD CAx development system.              *
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# *   This program is free software; you can redistribute it and/or modify  *
# *   it under the terms of the GNU Lesser General Public License (LGPL)    *
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# *   GNU Library General Public License for more details.                  *
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# ***************************************************************************

__title__ = "FreeCAD FEM calculix constraint heatflux"
__author__ = "Bernd Hahnebach"
__url__ = "https://www.freecad.org"


def get_analysis_types():
    return ["thermomech"]


def get_sets_name():
    return "constraints_heatflux_element_face_heatflux"


def get_before_write_meshdata_constraint():
    return ""


def get_after_write_meshdata_constraint():
    return ""


def write_meshdata_constraint(f, femobj, heatflux_obj, ccxwriter):

    # floats read from ccx should use {:.13G}, see comment in writer module

    if heatflux_obj.ConstraintType == "Convection":
        heatflux_key_word = "FILM"
        heatflux_facetype = "F"
        # SvdW: add factor to force heatflux to units system of t/mm/s/K
        heatflux_values = "{:.13G},{:.13G}".format(
            heatflux_obj.AmbientTemp, heatflux_obj.FilmCoef * 0.001
        )

    elif heatflux_obj.ConstraintType == "Radiation":
        heatflux_key_word = "RADIATE"
        heatflux_facetype = "R"
        heatflux_values = "{:.13G},{:.13G}".format(
            heatflux_obj.AmbientTemp, heatflux_obj.Emissivity
        )

    elif heatflux_obj.ConstraintType == "DFlux":
        heatflux_key_word = "DFLUX"
        heatflux_facetype = "S"
        heatflux_values = f"{heatflux_obj.DFlux * 0.001:.13G}"

    f.write(f"*{heatflux_key_word}\n")
    for ref_shape in femobj["HeatFluxFaceTable"]:
        elem_string = ref_shape[0]
        face_table = ref_shape[1]
        f.write(f"** Heat flux on face {elem_string}\n")
        for i in face_table:
            # OvG: Only write out the VolumeIDs linked to a particular face
            f.write(f"{i[0]},{heatflux_facetype}{i[1]},{heatflux_values}\n")
