function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread(); }

function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _iterableToArray(iter) { if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter); }

function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) return _arrayLikeToArray(arr); }

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

import { __rest } from "tslib";
import classNames from 'classnames';
import React, { createElement, forwardRef, useEffect, useMemo, useState } from "react";
import { isFunction, isUndef } from '../utils';
import { useGuid } from '../utils/hooks';
import View from '../view';
import Thumb from './thumb';
import Track from './track';
import { getClosestThumbIndex, getNodeRect, getPrecision, getTouchPosition, noop, pauseEvent } from './utils';
var Mode;

(function (Mode) {
  Mode["Single"] = "single";
  Mode["Double"] = "double";
})(Mode || (Mode = {}));

function getInitialRatio(max, min, value, defaultValue) {
  var ratio = min;

  if (!isUndef(value)) {
    ratio = value;
  } else if (!isUndef(defaultValue)) {
    ratio = defaultValue;
  }

  if (!Array.isArray(ratio)) {
    ratio = [ratio];
  }

  return ratio.map(function (item) {
    if (item > max) {
      return max;
    }

    if (item < min) {
      return min;
    }

    return item;
  }).reduce(function (prev, curr, index) {
    return Object.assign(Object.assign({}, prev), _defineProperty({}, index, (curr - min) / (max - min)));
  }, {});
}

var Range = function Range(props, ref) {
  var _props$size = props.size,
      size = _props$size === void 0 ? 'medium' : _props$size,
      _props$min = props.min,
      min = _props$min === void 0 ? 0 : _props$min,
      _props$prefix = props.prefix,
      prefix = _props$prefix === void 0 ? 'mt-' : _props$prefix,
      _props$max = props.max,
      max = _props$max === void 0 ? 100 : _props$max,
      _props$mode = props.mode,
      mode = _props$mode === void 0 ? 'single' : _props$mode,
      value = props.value,
      defaultValue = props.defaultValue,
      _props$step = props.step,
      step = _props$step === void 0 ? 1 : _props$step,
      _props$disabled = props.disabled,
      disabled = _props$disabled === void 0 ? false : _props$disabled,
      _props$marks = props.marks,
      marks = _props$marks === void 0 ? false : _props$marks,
      _props$marksPosition = props.marksPosition,
      marksPosition = _props$marksPosition === void 0 ? 'below' : _props$marksPosition,
      _props$previewed = props.previewed,
      previewed = _props$previewed === void 0 ? false : _props$previewed,
      className = props.className,
      tooltipVisible = props.tooltipVisible,
      _props$onChange = props.onChange,
      onChange = _props$onChange === void 0 ? noop : _props$onChange,
      _props$onProcess = props.onProcess,
      onProcess = _props$onProcess === void 0 ? noop : _props$onProcess,
      others = __rest(props, ["size", "min", "prefix", "max", "mode", "value", "defaultValue", "step", "disabled", "marks", "marksPosition", "previewed", "className", "tooltipVisible", "onChange", "onProcess"]);

  var _useState = useState(getInitialRatio(max, min, value, defaultValue)),
      _useState2 = _slicedToArray(_useState, 2),
      ratio = _useState2[0],
      setRatio = _useState2[1];

  var _useState3 = useState(null),
      _useState4 = _slicedToArray(_useState3, 2),
      active = _useState4[0],
      setActive = _useState4[1];

  var _useState5 = useState(false),
      _useState6 = _slicedToArray(_useState5, 2),
      dragging = _useState6[0],
      setDragging = _useState6[1];

  var _useState7 = useState(0),
      _useState8 = _slicedToArray(_useState7, 2),
      rangeWidth = _useState8[0],
      setRangeWidth = _useState8[1];

  var id = useGuid('range-');
  var thumbId1 = useGuid('range-thumb-');
  var thumbId2 = useGuid('range-thumb-');
  var isControlled = ('value' in props);
  var handles = mode === Mode.Double ? {
    0: thumbId1,
    1: thumbId2
  } : {
    0: thumbId1
  };

  function getRatioValue(val) {
    return parseFloat((val * (max - min) + min).toFixed(getPrecision(step)));
  }

  var points = useMemo(function () {
    var data = {};

    var dealPoints = function dealPoints() {
      if (step) {
        for (var point = min; point <= max; point += step) {
          var current = Number(point.toFixed(1));
          data[current] = current;
        }
      }
    };

    if (marks instanceof Array) {
      marks.reduce(function (prev, current) {
        prev[current] = current;
        return prev;
      }, data);
    } else if (marks instanceof Object) {
      data = Object.assign({}, marks);
    }

    dealPoints();
    return Object.keys(data).map(parseFloat).sort(function (a, b) {
      return a - b;
    });
  }, [marks, step, min, max]);

  function getClosestStep(val) {
    var diffs = points.map(function (point) {
      return Math.abs(point - val - min);
    });
    return points[diffs.indexOf(Math.min.apply(Math, _toConsumableArray(diffs)))];
  }

  function getValue(newRatio) {
    var result = Object.keys(newRatio).map(function (key) {
      return getRatioValue(newRatio[key]);
    }).sort(function (a, b) {
      return a - b;
    });

    if (result.length === 1) {
      return result[0];
    }

    return result;
  }

  function updatePositionByTouch(e, activeIndex) {
    return getNodeRect(id).then(function (rect) {
      var position = getTouchPosition(e);
      var diff = position - rect.left;
      var offset = Math.max(Math.min(diff, rect.width), 0);
      var closestValue = getClosestStep(offset / rect.width * (max - min));
      var newRatio = Object.assign({}, ratio);

      if (!isUndef(activeIndex)) {
        newRatio[activeIndex] = (closestValue - min) / (max - min);
      }

      if (!isControlled) {
        setRatio(newRatio);
      }

      return newRatio;
    });
  }

  function handleTouchStart(e) {
    if (disabled || previewed || dragging) {
      return;
    }

    var position = getTouchPosition(e);
    getClosestThumbIndex(position, handles).then(function (activeIndex) {
      setDragging(true);
      setActive(activeIndex);
      updatePositionByTouch(e, activeIndex).then(function (newRatio) {
        if (isFunction(onChange)) {
          onChange(getValue(newRatio), e);
        }
      });
      pauseEvent(e);
    });
  }

  function handleTouchMove(e) {
    if (!dragging) {
      return;
    }

    updatePositionByTouch(e, active).then(function (newRatio) {
      if (isFunction(onProcess)) {
        onProcess(getValue(newRatio), e);
      }

      if (isFunction(onChange)) {
        onChange(getValue(newRatio), e);
      }
    });
    pauseEvent(e);
  }

  function handleTouchEnd(e) {
    if (!dragging) {
      return;
    }

    setDragging(false);
    setActive(null);
    updatePositionByTouch(e, active).then(function (newRatio) {
      if (isFunction(onChange)) {
        onChange(getValue(newRatio), e);
      }
    });
    pauseEvent(e);
  }

  function adjustRatio() {
    var data = {};
    Object.keys(ratio).forEach(function (key) {
      return data[key] = (getClosestStep(ratio[key] * (max - min)) - min) / (max - min);
    });
    setRatio(data);
  }

  useEffect(function () {
    adjustRatio();
    setTimeout(function () {
      getNodeRect(id).then(function (rect) {
        setRangeWidth(rect.width);
      });
    }, 100);
  }, []);
  useEffect(function () {
    if (isControlled) {
      setRatio(getInitialRatio(max, min, value, defaultValue));
    }
  }, [value, defaultValue, max, min]);
  var ratioValue = Object.values(ratio).sort(function (a, b) {
    return a - b;
  });
  return /*#__PURE__*/React.createElement(View, _extends({}, others, {
    id: id,
    withoutTouch: false,
    className: classNames("".concat(prefix, "range"), className),
    onMouseDown: handleTouchStart,
    onMouseMove: handleTouchMove,
    onMouseUp: handleTouchEnd,
    onTouchStart: handleTouchStart,
    onTouchMove: handleTouchMove,
    onTouchEnd: handleTouchEnd
  }), /*#__PURE__*/React.createElement(Track, {
    prefix: prefix,
    size: size,
    min: min,
    max: max,
    marks: marks,
    marksPosition: marksPosition,
    disabled: disabled,
    ratio: ratioValue,
    rangeWidth: rangeWidth
  }), Object.keys(handles).map(function (key) {
    var isActive = "".concat(active) === "".concat(key);
    return /*#__PURE__*/React.createElement(Thumb, {
      prefix: prefix,
      key: key,
      size: size,
      id: handles[key],
      disabled: disabled,
      isActive: isActive,
      tooltipVisible: tooltipVisible,
      offset: ratio[key] * rangeWidth,
      value: getRatioValue(ratio[key])
    });
  }));
};

export default /*#__PURE__*/forwardRef(Range);