import { useState, useRef, useEffect } from "react";
import { useDropdownPosition } from "./useGridCore";

const OPERATORS = {
  number: [
    { key: "eq", label: "Equals" },
    { key: "neq", label: "Not Equal" },
    { key: "gt", label: "Greater Than" },
    { key: "gte", label: "Greater or Equal" },
    { key: "lt", label: "Less Than" },
    { key: "lte", label: "Less or Equal" },
    { key: "between", label: "Between" },
  ],
  text: [
    { key: "contains", label: "Contains" },
    { key: "starts", label: "Starts With" },
    { key: "ends", label: "Ends With" },
    { key: "eq", label: "Equals" },
  ],
  date: [
    { key: "before", label: "Before" },
    { key: "after", label: "After" },
    { key: "between", label: "Between" },
  ],
};

// ----------- FILTER UI COMPONENT ----------
function AdvanceFilter({ type = "number", onApply, onClear }) {
  const [operation, setOperator] = useState("");
  const [value1, setValue1] = useState("");
  const [value2, setValue2] = useState("");

  const ops = OPERATORS[type];

  const apply = () => {
    if (!operation) return;

    if (operation === "between") {
      onApply({
        operation,
        from: value1,
        to: value2,
      });
    } else {
      onApply({
        operation,
        value: value1,
      });
    }
  };

  return (
    <div
      className=""
      onClick={(e) => e.stopPropagation()}
      style={{ width: 240 }}
    >
      <div className="mb-2">
        <label className="form-label text-decoration-none">Condition</label>
        <select
          className="form-select form-select-sm"
          value={operation}
          onChange={(e) => setOperator(e.target.value)}
        >
          <option value="">Select</option>
          {ops.map((o) => (
            <option key={o.key} value={o.key}>
              {o.label}
            </option>
          ))}
        </select>
      </div>

      {/* Values */}
      {operation && (
        <div className="text-decoration-none">
          <label className="form-label">Value</label>

          {operation !== "between" ? (
            <input
              type={type === "date" ? "date" : "number"}
              className="form-control form-control-sm"
              value={value1}
              onChange={(e) => setValue1(e.target.value)}
            />
          ) : (
            <div className="d-flex gap-2">
              <input
                type={type === "date" ? "date" : "number"}
                className="form-control form-control-sm"
                placeholder="From"
                value={value1}
                onChange={(e) => setValue1(e.target.value)}
              />

              <input
                type={type === "date" ? "date" : "number"}
                className="form-control form-control-sm"
                placeholder="To"
                value={value2}
                onChange={(e) => setValue2(e.target.value)}
              />
            </div>
          )}
        </div>
      )}

      {/* Buttons */}
      <div className="d-flex flex-row mt-3">
        <button className="btn btn-primary btn-xs" onClick={apply}>
          Apply
        </button>
      </div>
    </div>
  );
}

// -------- HEADER OPTION ---------------
const PmsHeaderOption = ({
  column,
  pinned,
  onPinLeft,
  onPinRight,
  onUnpin,
  onAdvancedFilter,
}) => {
  const { key: columnKey, enableAdvancedFilter } = column;
  const rootRef = useRef(null);

  const btnRef = useRef(null);
  const menuRef = useRef(null);

  const filterBtnRef = useRef(null);
  const filterMenuRef = useRef(null);

  const pinBtnRef = useRef(null);
  const pinMenuRef = useRef(null);

  const [open, setOpen] = useState(false);
  const [openMenu, setOpenMenu] = useState(null);

  // Main dropdown position
  const mainStyle = useDropdownPosition(btnRef, menuRef, open, 0);

  // Submenus
  const filterStyle = useDropdownPosition(
    filterBtnRef,
    filterMenuRef,
    openMenu === "filter",
    1
  );

  const pinStyle = useDropdownPosition(
    pinBtnRef,
    pinMenuRef,
    openMenu === "pin",
    1
  );

  const toggleMenu = (name, e) => {
    e.stopPropagation();
    setOpenMenu((prev) => (prev === name ? null : name));
  };

  // ----------------------------
  // CLOSE WHEN CLICKING OUTSIDE
  // ----------------------------
  useEffect(() => {
    const handleOutside = (e) => {
      if (!rootRef.current) return;

      if (!rootRef.current.contains(e.target)) {
        setOpen(false);
        setOpenMenu(null);
      }
    };

    if (open) document.addEventListener("mousedown", handleOutside);
    return () => document.removeEventListener("mousedown", handleOutside);
  }, [open]);

  return (
    <div
      ref={rootRef}
      className="dropdown "
      style={{ zIndex: 9999, position: "relative" }}
    >
      {/* BUTTON */}
      <button
        ref={btnRef}
        className="btn btn-icon btn-text-secondary rounded-pill p-0"
        onClick={() => setOpen((p) => !p)}
      >
        <i className="bx bx-dots-vertical-rounded bx-sm text-muted"></i>
      </button>

      {/* MAIN MENU */}
      {open && (
        <ul
          ref={menuRef}
          className="dropdown-menu dropdown-menu-end shadow border rounded-3 py-2 show"
          style={mainStyle}
        >
          {/* ADVANCED FILTER */}
          {enableAdvancedFilter && (
            <li className="dropdown-submenu dropstart position-relative">
              <button
                ref={filterBtnRef}
                className="dropdown-item d-flex justify-content-between py-1 px-2 "
                onClick={(e) => toggleMenu("filter", e)}
              >
                <span>
                  <i className="bx bx-filter-alt me-2"></i> Filter
                </span>
                <i className="bx bx-chevron-right"></i>
              </button>

              {openMenu === "filter" && (
                <ul
                  ref={filterMenuRef}
                  className="dropdown-menu shadow rounded-3 py-2 p-0 show"
                  style={filterStyle}
                >
                  <li className="p-2">
                    <AdvanceFilter
                      type="number"
                      onApply={(f) => onAdvancedFilter({ ...f, columnKey })}
                      onClear={() => onAdvancedFilter(null)}
                    />
                  </li>
                </ul>
              )}
            </li>
          )}

          {/* PIN COLUMN */}
          <li className="dropdown-submenu dropstart position-relative">
            <button
              ref={pinBtnRef}
              className="dropdown-item d-flex justify-content-between py-1 px-2 "
              onClick={(e) => toggleMenu("pin", e)}
            >
              <span>
                <i className="bx bx-pin me-2"></i> Pin Column
              </span>
              <i className="bx bx-chevron-right"></i>
            </button>

            {openMenu === "pin" && (
              <ul
                ref={pinMenuRef}
                className="  dropdown-menu dropdown-menu-end shadow border rounded-3  py-2 show"
                style={pinStyle}
              >
                <li>
                  <button className="dropdown-item py-1 px-2" onClick={onUnpin}>
                    {!pinned && <i className="bx bx-check me-2"></i>}
                    No Pin
                  </button>
                </li>

                <li>
                  <button
                    className={`dropdown-item py-1 px-2  ${
                      pinned === "left" ? "active" : ""
                    }`}
                    onClick={onPinLeft}
                  >
                    {pinned === "left" && <i className="bx bx-check me-2"></i>}
                    Pin Left
                  </button>
                </li>

                <li>
                  <button
                    className={`dropdown-item py-1 px-2  ${
                      pinned === "right" ? "active" : ""
                    }`}
                    onClick={onPinRight}
                  >
                    {pinned === "right" && <i className="bx bx-check me-2"></i>}
                    Pin Right
                  </button>
                </li>
              </ul>
            )}
          </li>
        </ul>
      )}
    </div>
  );
};

export default PmsHeaderOption;