import { useMemo } from "react";
import type { BaseProps, HTMLProps } from "../../shared/types";
import { cn } from "../../shared/utils/cn";
import "./index.css";

type BaseSpinnerProps = HTMLProps<"svg">;

export type DeterminateSpinnerProps = BaseSpinnerProps & {
  determinate: true;
  value: number;
};

export type IndeterminateSpinnerProps = BaseSpinnerProps & {
  determinate?: false | null | undefined;
  value?: never;
};

export type SpinnerProps = (
  | DeterminateSpinnerProps
  | IndeterminateSpinnerProps
) &
  BaseProps;

const SIZE = 48;
const STROKE_WIDTH = 6;
const radius = (SIZE - STROKE_WIDTH) / 2;
const circumference = 2 * Math.PI * radius;

export const Spinner = ({
  value = 10,
  determinate = false,
  className,
  testId,
  ...props
}: SpinnerProps) => {
  const offset = useMemo(
    () => circumference - (value / 100) * circumference,
    [value]
  );

  return (
    <svg
      data-testid={testId}
      width={SIZE}
      height={SIZE}
      className={className}
      {...props}
    >
      <circle
        cx={SIZE / 2}
        cy={SIZE / 2}
        r={radius}
        fill="none"
        className="stroke-grey-970"
        strokeWidth={STROKE_WIDTH}
      />
      <g
        className={cn(
          !determinate && "animate-indeterminate-spinner origin-center"
        )}
      >
        <circle
          cx={SIZE / 2}
          cy={SIZE / 2}
          r={radius}
          fill="none"
          className="stroke-primary-500 animate-determinate-spinner"
          strokeWidth={STROKE_WIDTH}
          strokeDasharray={circumference}
          strokeDashoffset={offset}
          strokeLinecap="round"
          transform={`rotate(-90 ${SIZE / 2} ${SIZE / 2})`}
        />
      </g>
    </svg>
  );
};