'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var vue = require('vue');
require('../../../../hooks/index.cjs');
var index = require('../../../../hooks/use-state/index.cjs');

const MIN_SWIPE_DISTANCE = 0.1;
const STOP_SWIPE_DISTANCE = 0.01;
const REFRESH_INTERVAL = 20;
const SPEED_OFF_MULTIPLE = 0.995 ** REFRESH_INTERVAL;
function useTouchMove(domRef, onOffset) {
  const [touchPosition, setTouchPosition] = index.useState();
  const [lastTimestamp, setLastTimestamp] = index.useState(0);
  const [lastTimeDiff, setLastTimeDiff] = index.useState(0);
  const [lastOffset, setLastOffset] = index.useState();
  const motionInterval = vue.ref();
  function onTouchStart(e) {
    const { screenX, screenY } = e.touches[0];
    setTouchPosition({ x: screenX, y: screenY });
    clearInterval(motionInterval.value);
  }
  function onTouchMove(e) {
    if (!touchPosition.value)
      return;
    e.preventDefault();
    const { screenX, screenY } = e.touches[0];
    const offsetX = screenX - touchPosition.value.x;
    const offsetY = screenY - touchPosition.value.y;
    onOffset(offsetX, offsetY);
    setTouchPosition({ x: screenX, y: screenY });
    const now = Date.now();
    setLastTimeDiff(now - lastTimestamp.value);
    setLastTimestamp(now);
    setLastOffset({ x: offsetX, y: offsetY });
  }
  function onTouchEnd() {
    if (!touchPosition.value)
      return;
    const lastOffsetValue = lastOffset.value;
    setTouchPosition(null);
    setLastOffset(null);
    if (lastOffsetValue) {
      const distanceX = lastOffsetValue.x / lastTimeDiff.value;
      const distanceY = lastOffsetValue.y / lastTimeDiff.value;
      const absX = Math.abs(distanceX);
      const absY = Math.abs(distanceY);
      if (Math.max(absX, absY) < MIN_SWIPE_DISTANCE)
        return;
      let currentX = distanceX;
      let currentY = distanceY;
      motionInterval.value = setInterval(() => {
        if (Math.abs(currentX) < STOP_SWIPE_DISTANCE && Math.abs(currentY) < STOP_SWIPE_DISTANCE) {
          clearInterval(motionInterval.value);
          return;
        }
        currentX *= SPEED_OFF_MULTIPLE;
        currentY *= SPEED_OFF_MULTIPLE;
        onOffset(currentX * REFRESH_INTERVAL, currentY * REFRESH_INTERVAL);
      }, REFRESH_INTERVAL);
    }
  }
  const lastWheelDirectionRef = vue.ref();
  function onWheel(e) {
    const { deltaX, deltaY } = e;
    let mixed = 0;
    const absX = Math.abs(deltaX);
    const absY = Math.abs(deltaY);
    if (absX === absY) {
      mixed = lastWheelDirectionRef.value === "x" ? deltaX : deltaY;
    } else if (absX > absY) {
      mixed = deltaX;
      lastWheelDirectionRef.value = "x";
    } else {
      mixed = deltaY;
      lastWheelDirectionRef.value = "y";
    }
    if (onOffset(-mixed, -mixed))
      e.preventDefault();
  }
  const touchEventsRef = vue.ref({
    onTouchStart,
    onTouchMove,
    onTouchEnd,
    onWheel
  });
  function onProxyTouchStart(e) {
    touchEventsRef.value.onTouchStart(e);
  }
  function onProxyTouchMove(e) {
    touchEventsRef.value.onTouchMove(e);
  }
  function onProxyTouchEnd(e) {
    touchEventsRef.value.onTouchEnd(e);
  }
  function onProxyWheel(e) {
    touchEventsRef.value.onWheel(e);
  }
  vue.onMounted(() => {
    var _a, _b;
    document.addEventListener("touchmove", onProxyTouchMove, { passive: false });
    document.addEventListener("touchend", onProxyTouchEnd, { passive: false });
    (_a = domRef.value) == null ? void 0 : _a.addEventListener("touchstart", onProxyTouchStart, { passive: false });
    (_b = domRef.value) == null ? void 0 : _b.addEventListener("wheel", onProxyWheel, { passive: false });
  });
  vue.onBeforeUnmount(() => {
    document.removeEventListener("touchmove", onProxyTouchMove);
    document.removeEventListener("touchend", onProxyTouchEnd);
  });
}

exports.default = useTouchMove;
//# sourceMappingURL=useTouchMove.cjs.map
