# This code is part of KQCircuits
# Copyright (C) 2021 IQM Finland Oy
#
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from kqcircuits.pya_resolver import pya
from kqcircuits.util.parameters import Param, pdt
from kqcircuits.elements.element import Element
from kqcircuits.defaults import default_fluxline_type
from kqcircuits.elements.fluxlines import fluxline_type_choices


class Fluxline(Element):
    """Base class for fluxline objects without actual produce function."""

    default_type = default_fluxline_type

    fluxline_type = Param(pdt.TypeString, "Fluxline Type", default_type, choices=fluxline_type_choices)
    fluxline_width = Param(pdt.TypeDouble, "Fluxline width", 18, unit="μm")
    fluxline_gap_width = Param(pdt.TypeDouble, "Fluxline gap width", 2, unit="μm")

    fluxline_parameters = Param(pdt.TypeString, "Extra Fluxline Parameters", "{}")
    _fluxline_parameters = Param(pdt.TypeString, "Previous state of *_parameters", "{}", hidden=True)

    @classmethod
    def create(cls, layout, library=None, fluxline_type=None, **parameters):
        """Create a Fluxline cell in layout."""
        return cls.create_subtype(layout, library, fluxline_type, **parameters)[0]

    def coerce_parameters_impl(self):
        self.sync_parameters(Fluxline)

    def _insert_fluxline_shapes(self, left_gap, right_gap):
        """Inserts the gap shapes to the cell.

        Protection layer is added based on their bounding box.

        Arg:
            left_gap (DPolygon): polygon for the left gap
            right_gap (DPolygon): polygon for the right gap
        """
        # transfer to qubit coordinates
        self.cell.shapes(self.get_layer("base_metal_gap_wo_grid")).insert(left_gap)
        self.cell.shapes(self.get_layer("base_metal_gap_wo_grid")).insert(right_gap)
        # protection
        protection = (
            pya.Region([p.to_itype(self.layout.dbu) for p in [right_gap, left_gap]])
            .bbox()
            .enlarged(self.margin / self.layout.dbu, self.margin / self.layout.dbu)
        )
        self.add_protection(pya.Polygon(protection))

    def _add_fluxline_refpoints(self, port_ref):
        """Adds refpoints for "port_flux" and "port_flux_corner".

        Arg:
            port_ref (DPoint): position of "port_flux" in fluxline coordinates
        """
        self.refpoints["origin_fluxline"] = pya.DPoint(0, 0)
        self.add_port("flux", port_ref, pya.DVector(0, -1))
