import Vue from "vue";
import { computePosition, offset, flip, shift, arrow } from "@floating-ui/dom";

let tooltipNode = null;
let intervalId = null;

function removeTooltip() {
  try {
    intervalId && clearInterval(intervalId);
    tooltipNode && document.body.removeChild(tooltipNode);
  } catch (e) {
    // console.log(
    //   "尝试从DOM上移除tooltip元素失败，通常是因为已经在其他回调中被移除了，不需处理：",
    //   e
    // );
  }
}

Vue.directive("tooltip", {
  bind: function (el, binding) {
    if (!binding.value) {
      return;
    }
    el.addEventListener(
      "mouseenter",
      function (e) {
        tooltipNode = document.createElement("div");
        tooltipNode.style.position = "fixed";
        tooltipNode.style.zIndex = 2147483647;
        tooltipNode.style.backgroundColor = "#191A1C";
        tooltipNode.style.border = "1px solid rgba(151, 151, 151, 0.2)";
        tooltipNode.style.borderRadius = "3px";
        tooltipNode.style.border = "1px solid rgba(151, 151, 151, 0.2)";
        tooltipNode.style.boxShadow = "0px 2px 12px 0px rgba(0, 0, 0, 0.06)";
        tooltipNode.style.padding = "8px 8px";
        tooltipNode.style.fontSize = "12px";
        tooltipNode.style.cursor = "default";
        tooltipNode.style.pointerEvents = "none";
        tooltipNode.style.wordBreak = "keep-all";
        tooltipNode.style.whiteSpace = "pre";
        tooltipNode.style.fontSize = "12px";
        tooltipNode.style.lineHeight = "17px";
        tooltipNode.style.color = "rgba(255, 255, 255, 0.6)";
        tooltipNode.innerText = binding.value;

        const arrowNode = document.createElement("div");
        arrowNode.style.position = "absolute";
        arrowNode.style.backgroundColor = "inherit";
        arrowNode.style.boxSizing = "border-box";
        arrowNode.style.width = "12px";
        arrowNode.style.height = "12px";
        arrowNode.style.border = "1px solid transparent";
        arrowNode.style.borderRight = "inherit";
        arrowNode.style.borderBottom = "inherit";
        arrowNode.style.transform = "rotate(45deg)";

        tooltipNode.appendChild(arrowNode);
        document.body.appendChild(tooltipNode);

        computePosition(el, tooltipNode, {
          placement: "top",
          middleware: [
            offset(13),
            flip(),
            shift({ padding: 12 }),
            arrow({
              element: arrowNode,
              padding: 3,
            }),
          ],
        })
          .then(({ x, y, placement, middlewareData }) => {
            Object.assign(tooltipNode.style, {
              left: `${x}px`,
              top: `${y}px`,
            });

            const { x: arrowX, y: arrowY } = middlewareData.arrow;
            const staticSide = {
              top: "bottom",
              right: "left",
              bottom: "top",
              left: "right",
            }[placement.split("-")[0]];

            Object.assign(arrowNode.style, {
              left: arrowX != null ? `${arrowX}px` : "",
              [staticSide]: "-6px",
            });
          })
          .catch((err) => {
            console.log(
              "计算tooltip位置时出现异常，可能因为目标元素已经被卸载。"
            );
          });

        intervalId = setInterval(() => {
          if (!document.contains(el)) {
            removeTooltip();
          }
        }, 300);
      },
      {
        passive: false,
      }
    );
    el.addEventListener("mouseleave", removeTooltip);
    el.addEventListener("mousedown", removeTooltip);
    el.addEventListener("keydown", removeTooltip);
    el.addEventListener("scroll", removeTooltip);
    el.addEventListener("dragstart", removeTooltip);
    el.addEventListener("dragstart", removeTooltip);
    el.addEventListener("dragleave", removeTooltip);
  },
});