import { useCallback, useEffect, useRef } from "react";
import type { AppStore } from "@editor/store";
import { importImageAsLayer } from "@operations/import/importImage";
import { decodeBrowserImageFile } from "@platform/browser/imageFiles";

export function useImageImport(store: AppStore) {
  const inputRef = useRef<HTMLInputElement | null>(null);

  const importFile = useCallback(
    async (file: File) => {
      const image = await decodeBrowserImageFile(file);
      if (image) importImageAsLayer(store, image);
    },
    [store],
  );

  const openFilePicker = useCallback(() => inputRef.current?.click(), []);

  useEffect(() => {
    const handleKeyDown = (event: KeyboardEvent) => {
      if (event.defaultPrevented || event.key.toLowerCase() !== "o" || (!event.metaKey && !event.ctrlKey)) return;
      event.preventDefault();
      openFilePicker();
    };

    const handlePaste = (event: ClipboardEvent) => {
      const file = [...(event.clipboardData?.files ?? [])].find((candidate) => candidate.type.startsWith("image/"));
      if (!file) return;

      event.preventDefault();
      void importFile(file);
    };

    window.addEventListener("keydown", handleKeyDown);
    window.addEventListener("paste", handlePaste);
    return () => {
      window.removeEventListener("keydown", handleKeyDown);
      window.removeEventListener("paste", handlePaste);
    };
  }, [importFile, openFilePicker]);

  const input = (
    <input
      ref={inputRef}
      type="file"
      accept="image/*"
      className="hidden"
      onChange={(event) => {
        const file = event.currentTarget.files?.[0];
        event.currentTarget.value = "";
        if (file) void importFile(file);
      }}
    />
  );

  return { input, openFilePicker, importFile };
}