import type { Mark } from "prosemirror-model";
import type {
  EditorView,
  MarkView,
  ViewMutationRecord,
} from "prosemirror-view";

import type { BlockNoteEditor } from "@blocknote/core";
import type {
  CoreMarkViewSpec,
  CoreMarkViewUserOptions,
  MarkViewDOMSpec,
} from "./CoreMarkViewOptions.js";

/* eslint-disable curly */

export class CoreMarkView<ComponentType> implements MarkView {
  dom: HTMLElement;
  contentDOM: HTMLElement | undefined;
  mark: Mark;
  view: EditorView;
  inline: boolean;
  options: CoreMarkViewUserOptions<ComponentType>;
  editor: BlockNoteEditor<any, any, any>;

  #createElement(as?: MarkViewDOMSpec) {
    const { inline, mark } = this;
    return as == null
      ? document.createElement(inline ? "span" : "div")
      : as instanceof HTMLElement
        ? as
        : as instanceof Function
          ? as(mark)
          : document.createElement(as);
  }

  createDOM(as?: MarkViewDOMSpec) {
    return this.#createElement(as);
  }

  createContentDOM(as?: MarkViewDOMSpec) {
    return this.#createElement(as);
  }

  constructor({
    mark,
    view,
    inline,
    options,
    editor, // BlockNote specific
  }: CoreMarkViewSpec<ComponentType>) {
    this.mark = mark;
    this.view = view;
    this.inline = inline;
    this.options = options;
    this.editor = editor;

    this.dom = this.createDOM(options.as);
    this.contentDOM = options.contentAs
      ? this.createContentDOM(options.contentAs)
      : undefined;
    this.dom.setAttribute("data-mark-view-root", "true");
    if (this.contentDOM) {
      this.contentDOM.setAttribute("data-mark-view-content", "true");
      this.contentDOM.style.whiteSpace = "inherit";
    }
  }

  get component() {
    return this.options.component;
  }

  shouldIgnoreMutation: (mutation: ViewMutationRecord) => boolean = (
    mutation,
  ) => {
    if (!this.dom || !this.contentDOM) return true;

    if (mutation.type === "selection") return false;

    if (this.contentDOM === mutation.target && mutation.type === "attributes")
      return true;

    if (this.contentDOM.contains(mutation.target)) return false;

    return true;
  };

  ignoreMutation: (mutation: ViewMutationRecord) => boolean = (mutation) => {
    if (!this.dom || !this.contentDOM) return true;

    let result;

    const userIgnoreMutation = this.options.ignoreMutation;

    if (userIgnoreMutation) result = userIgnoreMutation(mutation);

    if (typeof result !== "boolean")
      result = this.shouldIgnoreMutation(mutation);

    return result;
  };

  public destroy() {
    this.options.destroy?.();
    this.dom.remove();
    this.contentDOM?.remove();
  }
}