import React, { Component } from 'react';
import { DomHandler, classNames } from 'primereact/utils';

function _classCallCheck(instance, Constructor) {
  if (!(instance instanceof Constructor)) {
    throw new TypeError("Cannot call a class as a function");
  }
}

function _defineProperties(target, props) {
  for (var i = 0; i < props.length; i++) {
    var descriptor = props[i];
    descriptor.enumerable = descriptor.enumerable || false;
    descriptor.configurable = true;
    if ("value" in descriptor) descriptor.writable = true;
    Object.defineProperty(target, descriptor.key, descriptor);
  }
}

function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
  if (staticProps) _defineProperties(Constructor, staticProps);
  Object.defineProperty(Constructor, "prototype", {
    writable: false
  });
  return Constructor;
}

function _assertThisInitialized(self) {
  if (self === void 0) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }

  return self;
}

function _setPrototypeOf(o, p) {
  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
    o.__proto__ = p;
    return o;
  };

  return _setPrototypeOf(o, p);
}

function _inherits(subClass, superClass) {
  if (typeof superClass !== "function" && superClass !== null) {
    throw new TypeError("Super expression must either be null or a function");
  }

  subClass.prototype = Object.create(superClass && superClass.prototype, {
    constructor: {
      value: subClass,
      writable: true,
      configurable: true
    }
  });
  Object.defineProperty(subClass, "prototype", {
    writable: false
  });
  if (superClass) _setPrototypeOf(subClass, superClass);
}

function _typeof(obj) {
  "@babel/helpers - typeof";

  return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
    return typeof obj;
  } : function (obj) {
    return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
  }, _typeof(obj);
}

function _possibleConstructorReturn(self, call) {
  if (call && (_typeof(call) === "object" || typeof call === "function")) {
    return call;
  } else if (call !== void 0) {
    throw new TypeError("Derived constructors may only return object or undefined");
  }

  return _assertThisInitialized(self);
}

function _getPrototypeOf(o) {
  _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
    return o.__proto__ || Object.getPrototypeOf(o);
  };
  return _getPrototypeOf(o);
}

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;
}

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
var ScrollPanel = /*#__PURE__*/function (_Component) {
  _inherits(ScrollPanel, _Component);

  var _super = _createSuper(ScrollPanel);

  function ScrollPanel(props) {
    var _this;

    _classCallCheck(this, ScrollPanel);

    _this = _super.call(this, props);
    _this.moveBar = _this.moveBar.bind(_assertThisInitialized(_this));
    _this.onXBarMouseDown = _this.onXBarMouseDown.bind(_assertThisInitialized(_this));
    _this.onYBarMouseDown = _this.onYBarMouseDown.bind(_assertThisInitialized(_this));
    _this.onDocumentMouseMove = _this.onDocumentMouseMove.bind(_assertThisInitialized(_this));
    _this.onDocumentMouseUp = _this.onDocumentMouseUp.bind(_assertThisInitialized(_this));
    return _this;
  }

  _createClass(ScrollPanel, [{
    key: "calculateContainerHeight",
    value: function calculateContainerHeight() {
      var containerStyles = getComputedStyle(this.container),
          xBarStyles = getComputedStyle(this.xBar),
          pureContainerHeight = DomHandler.getHeight(this.container) - parseInt(xBarStyles['height'], 10);

      if (containerStyles['max-height'] !== "none" && pureContainerHeight === 0) {
        if (this.content.offsetHeight + parseInt(xBarStyles['height'], 10) > parseInt(containerStyles['max-height'], 10)) {
          this.container.style.height = containerStyles['max-height'];
        } else {
          this.container.style.height = this.content.offsetHeight + parseFloat(containerStyles.paddingTop) + parseFloat(containerStyles.paddingBottom) + parseFloat(containerStyles.borderTopWidth) + parseFloat(containerStyles.borderBottomWidth) + "px";
        }
      }
    }
  }, {
    key: "moveBar",
    value: function moveBar() {
      var _this2 = this;

      /* horizontal scroll */
      var totalWidth = this.content.scrollWidth;
      var ownWidth = this.content.clientWidth;
      var bottom = (this.container.clientHeight - this.xBar.clientHeight) * -1;
      this.scrollXRatio = ownWidth / totalWidth;
      /* vertical scroll */

      var totalHeight = this.content.scrollHeight;
      var ownHeight = this.content.clientHeight;
      var right = (this.container.clientWidth - this.yBar.clientWidth) * -1;
      this.scrollYRatio = ownHeight / totalHeight;
      this.frame = this.requestAnimationFrame(function () {
        if (_this2.scrollXRatio >= 1) {
          DomHandler.addClass(_this2.xBar, 'p-scrollpanel-hidden');
        } else {
          DomHandler.removeClass(_this2.xBar, 'p-scrollpanel-hidden');
          _this2.xBar.style.cssText = 'width:' + Math.max(_this2.scrollXRatio * 100, 10) + '%; left:' + _this2.content.scrollLeft / totalWidth * 100 + '%;bottom:' + bottom + 'px;';
        }

        if (_this2.scrollYRatio >= 1) {
          DomHandler.addClass(_this2.yBar, 'p-scrollpanel-hidden');
        } else {
          DomHandler.removeClass(_this2.yBar, 'p-scrollpanel-hidden');
          _this2.yBar.style.cssText = 'height:' + Math.max(_this2.scrollYRatio * 100, 10) + '%; top: calc(' + _this2.content.scrollTop / totalHeight * 100 + '% - ' + _this2.xBar.clientHeight + 'px);right:' + right + 'px;';
        }
      });
    }
  }, {
    key: "onYBarMouseDown",
    value: function onYBarMouseDown(e) {
      this.isYBarClicked = true;
      this.lastPageY = e.pageY;
      DomHandler.addClass(this.yBar, 'p-scrollpanel-grabbed');
      DomHandler.addClass(document.body, 'p-scrollpanel-grabbed');
      document.addEventListener('mousemove', this.onDocumentMouseMove);
      document.addEventListener('mouseup', this.onDocumentMouseUp);
      e.preventDefault();
    }
  }, {
    key: "onXBarMouseDown",
    value: function onXBarMouseDown(e) {
      this.isXBarClicked = true;
      this.lastPageX = e.pageX;
      DomHandler.addClass(this.xBar, 'p-scrollpanel-grabbed');
      DomHandler.addClass(document.body, 'p-scrollpanel-grabbed');
      document.addEventListener('mousemove', this.onDocumentMouseMove);
      document.addEventListener('mouseup', this.onDocumentMouseUp);
      e.preventDefault();
    }
  }, {
    key: "onDocumentMouseMove",
    value: function onDocumentMouseMove(e) {
      if (this.isXBarClicked) {
        this.onMouseMoveForXBar(e);
      } else if (this.isYBarClicked) {
        this.onMouseMoveForYBar(e);
      } else {
        this.onMouseMoveForXBar(e);
        this.onMouseMoveForYBar(e);
      }
    }
  }, {
    key: "onMouseMoveForXBar",
    value: function onMouseMoveForXBar(e) {
      var _this3 = this;

      var deltaX = e.pageX - this.lastPageX;
      this.lastPageX = e.pageX;
      this.frame = this.requestAnimationFrame(function () {
        _this3.content.scrollLeft += deltaX / _this3.scrollXRatio;
      });
    }
  }, {
    key: "onMouseMoveForYBar",
    value: function onMouseMoveForYBar(e) {
      var _this4 = this;

      var deltaY = e.pageY - this.lastPageY;
      this.lastPageY = e.pageY;
      this.frame = this.requestAnimationFrame(function () {
        _this4.content.scrollTop += deltaY / _this4.scrollYRatio;
      });
    }
  }, {
    key: "onDocumentMouseUp",
    value: function onDocumentMouseUp(e) {
      DomHandler.removeClass(this.yBar, 'p-scrollpanel-grabbed');
      DomHandler.removeClass(this.xBar, 'p-scrollpanel-grabbed');
      DomHandler.removeClass(document.body, 'p-scrollpanel-grabbed');
      document.removeEventListener('mousemove', this.onDocumentMouseMove);
      document.removeEventListener('mouseup', this.onDocumentMouseUp);
      this.isXBarClicked = false;
      this.isYBarClicked = false;
    }
  }, {
    key: "requestAnimationFrame",
    value: function requestAnimationFrame(f) {
      var frame = window.requestAnimationFrame || this.timeoutFrame;
      return frame(f);
    }
  }, {
    key: "refresh",
    value: function refresh() {
      this.moveBar();
    }
  }, {
    key: "componentDidMount",
    value: function componentDidMount() {
      this.moveBar();
      this.moveBar = this.moveBar.bind(this);
      window.addEventListener('resize', this.moveBar);
      this.calculateContainerHeight();
      this.initialized = true;
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      if (this.initialized) {
        window.removeEventListener('resize', this.moveBar);
      }

      if (this.frame) {
        window.cancelAnimationFrame(this.frame);
      }
    }
  }, {
    key: "render",
    value: function render() {
      var _this5 = this;

      var className = classNames('p-scrollpanel p-component', this.props.className);
      return /*#__PURE__*/React.createElement("div", {
        ref: function ref(el) {
          return _this5.container = el;
        },
        id: this.props.id,
        className: className,
        style: this.props.style
      }, /*#__PURE__*/React.createElement("div", {
        className: "p-scrollpanel-wrapper"
      }, /*#__PURE__*/React.createElement("div", {
        ref: function ref(el) {
          return _this5.content = el;
        },
        className: "p-scrollpanel-content",
        onScroll: this.moveBar,
        onMouseEnter: this.moveBar
      }, this.props.children)), /*#__PURE__*/React.createElement("div", {
        ref: function ref(el) {
          return _this5.xBar = el;
        },
        className: "p-scrollpanel-bar p-scrollpanel-bar-x",
        onMouseDown: this.onXBarMouseDown
      }), /*#__PURE__*/React.createElement("div", {
        ref: function ref(el) {
          return _this5.yBar = el;
        },
        className: "p-scrollpanel-bar p-scrollpanel-bar-y",
        onMouseDown: this.onYBarMouseDown
      }));
    }
  }]);

  return ScrollPanel;
}(Component);

_defineProperty(ScrollPanel, "defaultProps", {
  id: null,
  style: null,
  className: null
});

export { ScrollPanel };