"""Implementation of the Ellipse class.
"""

from typing import Any
from typing import Union

from apysc import Int
from apysc.display.cx_interface import CxInterface
from apysc.display.cy_interface import CyInterface
from apysc.display.line_base import LineBase
from apysc.display.width_and_height_interfaces_for_ellipse import \
    WidthAndHeightInterfacesForEllipse

_Graphics = Any


class Ellipse(
        CxInterface, CyInterface, LineBase,
        WidthAndHeightInterfacesForEllipse):

    def __init__(
            self,
            parent: _Graphics,
            x: Union[int, Int],
            y: Union[int, Int],
            width: Union[int, Int],
            height: Union[int, Int]) -> None:
        """
        Create a ellipse vector graphics.

        Parameters
        ----------
        parent : Graphics
            Graphics instance to link this graphics.
        x : int or Int
            X-coordinate of the ellipse center.
        y : int or Int
            Y-coordinate of the ellipse center.
        width : int or Int
            Ellipse width.
        height : int or Int
            Ellipse height.
        """
        from apysc.converter.to_apysc_val_from_builtin import \
            get_copied_int_from_builtin_val
        from apysc.expression import expression_variables_util
        from apysc.expression import var_names
        from apysc.validation import size_validation
        variable_name: str = expression_variables_util.get_next_variable_name(
            type_name=var_names.ELLIPSE)
        super(Ellipse, self).__init__(
            parent=parent, x=0, y=0, variable_name=variable_name)
        size_validation.validate_size_is_gt_zero(size=width)
        size_validation.validate_size_is_gt_zero(size=height)
        self._width = get_copied_int_from_builtin_val(integer=width)
        self._height = get_copied_int_from_builtin_val(integer=height)
        self._set_initial_basic_values(parent=parent)
        self._append_constructor_expression()
        self.x = get_copied_int_from_builtin_val(integer=x)
        self.y = get_copied_int_from_builtin_val(integer=y)
        self._set_line_setting_if_not_none_value_exists(
            parent_graphics=parent)

    def _append_constructor_expression(self) -> None:
        """
        Append a constructor expression to the file.
        """
        from apysc.display.stage import get_stage_variable_name
        from apysc.expression import expression_file_util
        from apysc.type import value_util
        stage_variable_name: str = get_stage_variable_name()
        width_str: str = value_util.get_value_str_for_expression(
            value=self._width)
        height_str: str = value_util.get_value_str_for_expression(
            value=self._height)
        expression: str = (
            f'var {self.variable_name} = {stage_variable_name}'
            f'\n  .ellipse({width_str}, {height_str})'
            '\n  .attr({'
        )
        expression = self._append_basic_vals_expression(
            expression=expression, indent_num=2)
        expression += '\n  });'
        expression_file_util.append_js_expression(expression=expression)

    def __repr__(self) -> str:
        """
        Get a string representation of this instance (for the sake of
        debugging).

        Returns
        -------
        repr_str : str
            Type name and variable name will be set
            (e.g., `Ellipse('<variable_name>')`).
        """
        repr_str: str = f"Ellipse('{self.variable_name}')"
        return repr_str
