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of this software and associated documentation files (the "Software"), to deal
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 -->

<script lang="ts" module>
  let ids = $state([] as number[]);
  let idCtr = $state(0);
  let dialogObject = $state({
    open: false,
    title: '',
    content: '',
    closeBtn: false,
    buttons: [
      {
        text: 'Close',
      },
    ] as {
      text: string;
      callback?: () =>
        | {
            success: true;
            content: string;
          }
        | {
            success: false;
            content: any;
          };
    }[],
  });
  let closeAlert = (m: string) => void 0;
  let cancelAlert = (err?: any) => void 0;
  let dialogPromises = [] as Promise<string>[];
  let dialogPromise = Promise.resolve('');
  const createDialogPromise = (setAlertTo?: typeof dialogObject) => (
    dialogPromises.push(
      (dialogPromise = new Promise<string>((rs, rj) => {
        let oldCloseAlert = closeAlert;
        let oldCancelAlert = cancelAlert;
        closeAlert = (m) => {
          closeAlert = oldCloseAlert;
          dialogObject = setAlertTo ?? dialogObject;
          rs(m);
        };
        cancelAlert = (m) => {
          cancelAlert = oldCancelAlert;
          dialogObject = setAlertTo ?? dialogObject;
          rj(m);
        };
      }))
    ),
    dialogPromise
  );
  export const alert = async (
    message: string,
    options?: {
      title?: string;
      /** prioritise over existing alerts */
      priority?: boolean;
      /** if we can close the dialog with the x at the top */
      canClose?: boolean;
      /** button list */
      buttons?: typeof dialogObject.buttons;
    }
  ) => {
    if (!options?.priority) await Promise.allSettled(dialogPromises);
    const oldAlert = dialogObject;
    dialogObject = {
      open: true,
      title: options?.title ?? 'Alert',
      closeBtn: options?.canClose ?? true,
      buttons: options?.buttons ?? [
        {
          text: 'Close',
        },
      ],
      content: message,
    };
    return createDialogPromise(oldAlert);
  };
  export const confirm = async (
    message: string,
    options?: Omit<Parameters<typeof alert>[1], 'buttons'>
  ) => {
    const rs = await alert(message, {
      title: 'Confirmation',
      ...(options ?? {}),
      buttons: [
        {
          text: 'OK',
          callback: () => ({
            success: true,
            content: 'OK',
          }),
        },
        {
          text: 'Cancel',
          callback: () => ({
            success: true,
            content: 'Cancel',
          }),
        },
      ],
    });
    return rs === 'OK';
  };
</script>

<script lang="ts">
  import { onDestroy, onMount } from 'svelte';

  let dialog = $state(null as HTMLDialogElement | null);
  let id: number = $state(-1);
  onMount(() => {
    id = idCtr++;
    ids.push(id);
  });
  onDestroy(() => (ids = ids.filter((v) => v !== id)));
  $effect(() => {
    dialog?.showModal();
  });
</script>

{#if ids[0] === id && dialogObject.open}
  <section>
    <dialog bind:this={dialog}>
      <form method="dialog">
        <div class="heading">
          <div class="wrapper">
            <div class="icon"></div>
            <p class="text">{dialogObject.title}</p>
          </div>
          <button
            class="close"
            aria-label="Close"
            disabled={!dialogObject.closeBtn}
            onclick={() => {
              cancelAlert(new Error('User Cancelled Alert'));
            }}
          ></button>
        </div>
        <div class="content">
          {dialogObject.content}
        </div>
        <menu class="footer-btns" style="gap: 4px; display: flex;">
          {#each dialogObject.buttons as button}
            <button
              onclick={(e) => {
                const callback =
                  button.callback ??
                  (() => ({
                    success: true,
                    content: button.text,
                  }));
                const result = callback();
                if (result.success) closeAlert(result.content);
                else cancelAlert(result.content);
              }}>{button.text}</button
            >
          {/each}
        </menu>
      </form>
    </dialog>
  </section>
{/if}
