<script lang="ts">
  import { draw } from 'svelte/transition';
  import type { DrawParams } from 'svelte/transition';
  import type { SVGAttributes } from 'svelte/elements';

  type TitleType = {
    id?: string;
    title?: string;
  };
  type DescType = {
    id?: string;
    desc?: string;
  };

  interface Props extends SVGAttributes<SVGSVGElement> {
    pauseDuration?: number;
    event?: 'hover' | 'click' | 'none';
    title?: TitleType;
    desc?: DescType;
    ariaLabel?: string;
    size?: number;
    color?: string;
    strokeWidth?: number;
    transitionParams?: DrawParams;
  }

  let {
    pauseDuration = 300,
    event = 'hover',
    size = 24,
    color = 'currentColor',
    strokeWidth = 1.5,
    title,
    desc,
    ariaLabel = 'envelope',
    transitionParams = { duration: 500, delay: 0 },
    class: className,
    ...restProps
  }: Props = $props();

  const getDuration = (params?: DrawParams): number => {
    if (!params?.duration) return 0;
    if (typeof params.duration === 'function') {
      return params.duration(0);
    }
    return params.duration;
  };

  $effect(() => {
    visible = true;
    isAnimating = false;
  });

  let visible = $state(true);
  let totalDuration = $derived(getDuration(transitionParams) + pauseDuration);

  let ariaDescribedby = `${title?.id || ''} ${desc?.id || ''}`;
  const hasDescription = $derived(!!(title?.id || desc?.id));

  let isAnimating = $state(false);

  const handleEvent = () => {
    // Only animate if event is not 'none'
    if (event === 'none' || isAnimating) return;

    isAnimating = true;
    visible = false;

    setTimeout(() => {
      visible = true;
      isAnimating = false;
    }, totalDuration);
  };

  const eventHandlers = $derived(
    event === 'none'
      ? {} // No event handlers when event is 'none'
      : event === 'hover'
        ? { onmouseenter: handleEvent, onclick: undefined }
        : {
            onclick: handleEvent,
            onmouseenter: undefined,
            onmouseover: undefined
          }
  );
</script>

<svg
  xmlns="http://www.w3.org/2000/svg"
  {...restProps}
  {...eventHandlers}
  width={size}
  height={size}
  fill="none"
  role={event === 'none' ? 'img' : 'button'}
  aria-label={ariaLabel}
  aria-describedby={hasDescription ? ariaDescribedby : undefined}
  viewBox="0 0 24 24"
  class={className}
>
  {#if title?.id && title.title}
    <title id={title.id}>{title.title}</title>
  {/if}
  {#if desc?.id && desc.desc}
    <desc id={desc.id}>{desc.desc}</desc>
  {/if}
  {#if visible}
    <path
      d="M21.75 6.75V17.25C21.75 18.4926 20.7426 19.5 19.5 19.5H4.5C3.25736 19.5 2.25 18.4926 2.25 17.25V6.75M21.75 6.75C21.75 5.50736 20.7426 4.5 19.5 4.5H4.5C3.25736 4.5 2.25 5.50736 2.25 6.75M21.75 6.75V6.99271C21.75 7.77405 21.3447 8.49945 20.6792 8.90894L13.1792 13.5243C12.4561 13.9694 11.5439 13.9694 10.8208 13.5243L3.32078 8.90894C2.65535 8.49945 2.25 7.77405 2.25 6.99271V6.75"
      stroke={color}
      stroke-width={strokeWidth}
      transition:draw={transitionParams}
      stroke-linecap="round"
      stroke-linejoin="round"
    />
  {/if}
</svg>
