import { Editor, findParentNode, isTextSelection } from "@tiptap/core";
import { EditorState, Selection, Transaction } from "@tiptap/pm/state";
import { EditorView } from "@tiptap/pm/view";
import { CellSelection, TableMap } from "@tiptap/pm/tables";
import { Node, ResolvedPos } from "@tiptap/pm/model";
import { sanitizeUrl as braintreeSanitizeUrl } from "@braintree/sanitize-url";
import { customAlphabet } from "nanoid";

export const isRectSelected = (rect: any) => (selection: CellSelection) => {
  const map = TableMap.get(selection.$anchorCell.node(-1));
  const start = selection.$anchorCell.start(-1);
  const cells = map.cellsInRect(rect);
  const selectedCells = map.cellsInRect(
    map.rectBetween(
      selection.$anchorCell.pos - start,
      selection.$headCell.pos - start,
    ),
  );

  for (let i = 0, count = cells.length; i < count; i += 1) {
    if (selectedCells.indexOf(cells[i]) === -1) {
      return false;
    }
  }

  return true;
};

export const findTable = (selection: Selection) =>
  findParentNode(
    (node) => node.type.spec.tableRole && node.type.spec.tableRole === "table",
  )(selection);

export const isCellSelection = (selection: any) =>
  selection instanceof CellSelection;

export const isColumnSelected = (columnIndex: number) => (selection: any) => {
  if (isCellSelection(selection)) {
    const map = TableMap.get(selection.$anchorCell.node(-1));

    return isRectSelected({
      left: columnIndex,
      right: columnIndex + 1,
      top: 0,
      bottom: map.height,
    })(selection);
  }

  return false;
};

export const isRowSelected = (rowIndex: number) => (selection: any) => {
  if (isCellSelection(selection)) {
    const map = TableMap.get(selection.$anchorCell.node(-1));

    return isRectSelected({
      left: 0,
      right: map.width,
      top: rowIndex,
      bottom: rowIndex + 1,
    })(selection);
  }

  return false;
};

export const isTableSelected = (selection: any) => {
  if (isCellSelection(selection)) {
    const map = TableMap.get(selection.$anchorCell.node(-1));

    return isRectSelected({
      left: 0,
      right: map.width,
      top: 0,
      bottom: map.height,
    })(selection);
  }

  return false;
};

export const getCellsInColumn =
  (columnIndex: number | number[]) => (selection: Selection) => {
    const table = findTable(selection);
    if (table) {
      const map = TableMap.get(table.node);
      const indexes = Array.isArray(columnIndex)
        ? columnIndex
        : Array.from([columnIndex]);

      return indexes.reduce(
        (acc, index) => {
          if (index >= 0 && index <= map.width - 1) {
            const cells = map.cellsInRect({
              left: index,
              right: index + 1,
              top: 0,
              bottom: map.height,
            });

            return acc.concat(
              cells.map((nodePos) => {
                const node = table.node.nodeAt(nodePos);
                const pos = nodePos + table.start;

                return { pos, start: pos + 1, node };
              }),
            );
          }

          return acc;
        },
        [] as { pos: number; start: number; node: Node | null | undefined }[],
      );
    }
    return null;
  };

export const getCellsInRow =
  (rowIndex: number | number[]) => (selection: Selection) => {
    const table = findTable(selection);

    if (table) {
      const map = TableMap.get(table.node);
      const indexes = Array.isArray(rowIndex)
        ? rowIndex
        : Array.from([rowIndex]);

      return indexes.reduce(
        (acc, index) => {
          if (index >= 0 && index <= map.height - 1) {
            const cells = map.cellsInRect({
              left: 0,
              right: map.width,
              top: index,
              bottom: index + 1,
            });

            return acc.concat(
              cells.map((nodePos) => {
                const node = table.node.nodeAt(nodePos);
                const pos = nodePos + table.start;
                return { pos, start: pos + 1, node };
              }),
            );
          }

          return acc;
        },
        [] as { pos: number; start: number; node: Node | null | undefined }[],
      );
    }

    return null;
  };

export const getCellsInTable = (selection: Selection) => {
  const table = findTable(selection);

  if (table) {
    const map = TableMap.get(table.node);
    const cells = map.cellsInRect({
      left: 0,
      right: map.width,
      top: 0,
      bottom: map.height,
    });

    return cells.map((nodePos) => {
      const node = table.node.nodeAt(nodePos);
      const pos = nodePos + table.start;

      return { pos, start: pos + 1, node };
    });
  }

  return null;
};

export const findParentNodeClosestToPos = (
  $pos: ResolvedPos,
  predicate: (node: Node) => boolean,
) => {
  for (let i = $pos.depth; i > 0; i -= 1) {
    const node = $pos.node(i);

    if (predicate(node)) {
      return {
        pos: i > 0 ? $pos.before(i) : 0,
        start: $pos.start(i),
        depth: i,
        node,
      };
    }
  }

  return null;
};

export const findCellClosestToPos = ($pos: ResolvedPos) => {
  const predicate = (node: Node) =>
    node.type.spec.tableRole && /cell/i.test(node.type.spec.tableRole);

  return findParentNodeClosestToPos($pos, predicate);
};

const select =
  (type: "row" | "column") => (index: number) => (tr: Transaction) => {
    const table = findTable(tr.selection);
    const isRowSelection = type === "row";

    if (table) {
      const map = TableMap.get(table.node);

      // Check if the index is valid
      if (index >= 0 && index < (isRowSelection ? map.height : map.width)) {
        const left = isRowSelection ? 0 : index;
        const top = isRowSelection ? index : 0;
        const right = isRowSelection ? map.width : index + 1;
        const bottom = isRowSelection ? index + 1 : map.height;

        const cellsInFirstRow = map.cellsInRect({
          left,
          top,
          right: isRowSelection ? right : left + 1,
          bottom: isRowSelection ? top + 1 : bottom,
        });

        const cellsInLastRow =
          bottom - top === 1
            ? cellsInFirstRow
            : map.cellsInRect({
                left: isRowSelection ? left : right - 1,
                top: isRowSelection ? bottom - 1 : top,
                right,
                bottom,
              });

        const head = table.start + cellsInFirstRow[0];
        const anchor = table.start + cellsInLastRow[cellsInLastRow.length - 1];
        const $head = tr.doc.resolve(head);
        const $anchor = tr.doc.resolve(anchor);

        // @ts-ignore
        return tr.setSelection(new CellSelection($anchor, $head));
      }
    }
    return tr;
  };

export const selectColumn = select("column");

export const selectRow = select("row");

export const selectTable = (tr: Transaction) => {
  const table = findTable(tr.selection);

  if (table) {
    const { map } = TableMap.get(table.node);

    if (map && map.length) {
      const head = table.start + map[0];
      const anchor = table.start + map[map.length - 1];
      const $head = tr.doc.resolve(head);
      const $anchor = tr.doc.resolve(anchor);

      // @ts-ignore
      return tr.setSelection(new CellSelection($anchor, $head));
    }
  }

  return tr;
};

export const isColumnGripSelected = ({
  editor,
  view,
  state,
  from,
}: {
  editor: Editor;
  view: EditorView;
  state: EditorState;
  from: number;
}) => {
  const domAtPos = view.domAtPos(from).node as HTMLElement;
  const nodeDOM = view.nodeDOM(from) as HTMLElement;
  const node = nodeDOM || domAtPos;

  if (!editor.isActive("table") || !node || isTableSelected(state.selection)) {
    return false;
  }

  let container = node;

  while (container && !["TD", "TH"].includes(container.tagName)) {
    container = container.parentElement!;
  }

  const gripColumn =
    container &&
    container.querySelector &&
    container.querySelector("a.grip-column.selected");

  return !!gripColumn;
};

export const isRowGripSelected = ({
  editor,
  view,
  state,
  from,
}: {
  editor: Editor;
  view: EditorView;
  state: EditorState;
  from: number;
}) => {
  const domAtPos = view.domAtPos(from).node as HTMLElement;
  const nodeDOM = view.nodeDOM(from) as HTMLElement;
  const node = nodeDOM || domAtPos;

  if (!editor.isActive("table") || !node || isTableSelected(state.selection)) {
    return false;
  }

  let container = node;

  while (container && !["TD", "TH"].includes(container.tagName)) {
    container = container.parentElement!;
  }

  const gripRow =
    container &&
    container.querySelector &&
    container.querySelector("a.grip-row.selected");

  return !!gripRow;
};

export function isTextSelected(editor: Editor) {
  const {
    state: {
      doc,
      selection,
      selection: { empty, from, to },
    },
  } = editor;

  const isEmptyTextBlock =
    !doc.textBetween(from, to).length && isTextSelection(selection);

  if (empty || isEmptyTextBlock || !editor.isEditable) {
    return false;
  }

  return true;
}

export function setAttributes(
  editor: Editor,
  getPos: (() => number) | boolean,
  attrs: Record<string, any>,
) {
  if (editor.isEditable && typeof getPos === "function") {
    editor.view.dispatch(
      editor.view.state.tr.setNodeMarkup(getPos(), undefined, attrs),
    );
  }
}

export function icon(name: string) {
  return `<span class="ProseMirror-icon ProseMirror-icon-${name}"></span>`;
}

export function sanitizeUrl(url: string | undefined): string {
  if (!url) return "";

  const sanitized = braintreeSanitizeUrl(url);

  // Return empty string instead of "about:blank"
  return sanitized === "about:blank" ? "" : sanitized;
}

export function isInternalFileUrl(url: string | undefined): boolean {
  if (!url) return false;
  const normalized = url.trim();
  return normalized.startsWith("/api/files/") || normalized.startsWith("/files/");
}

const alphabet = "abcdefghijklmnopqrstuvwxyz";
export const generateNodeId = customAlphabet(alphabet, 12);

export function copyToClipboard(text: string): void {
  if ("clipboard" in navigator) {
    navigator.clipboard.writeText(text).catch(() => {
      execCommandCopy(text);
    });
  } else {
    execCommandCopy(text);
  }
}

export function execCommandCopy(text: string): void {
  const textarea = document.createElement("textarea");
  textarea.value = text;
  textarea.style.position = "fixed";
  textarea.style.left = "-9999px";
  textarea.style.top = "-9999px";
  document.body.appendChild(textarea);
  textarea.select();
  document.execCommand("copy");
  document.body.removeChild(textarea);
}