"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.computeScale = computeScale;
exports.withAutoScale = withAutoScale;
var _react = _interopRequireWildcard(require("react"));
var _lodash = require("lodash");
var _eui = require("@elastic/eui");
var _with_auto_scale = require("./with_auto_scale.styles");
function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

const MAX_SCALE = 1;
const MIN_SCALE = 0.3;

/**
 * computeScale computes the ratio by which the child needs to shrink in order
 * to fit into the parent. This function is only exported for testing purposes.
 */
function computeScale(parent, child, minScale = MIN_SCALE) {
  if (!parent || !child) {
    return 1;
  }
  const scaleX = parent.clientWidth / child.clientWidth;
  const scaleY = parent.clientHeight / child.clientHeight;
  return Math.max(Math.min(MAX_SCALE, Math.min(scaleX, scaleY)), minScale);
}
function hasAutoscaleProps(props) {
  if (props.autoScaleParams) {
    return true;
  }
  return false;
}
function getWrappedComponentProps(props) {
  if (hasAutoscaleProps(props)) {
    const {
      autoScaleParams,
      renderComplete,
      ...rest
    } = props;
    return rest;
  }
  return props;
}
function withAutoScale(WrappedComponent) {
  return props => {
    const {
      autoScaleParams,
      renderComplete
    } = props;
    const restProps = getWrappedComponentProps(props);
    // An initial scale of 0 means we always redraw
    // at least once, which is sub-optimal, but it
    // prevents an annoying flicker.
    const [scale, setScale] = (0, _react.useState)(0);
    const [resized, setResized] = (0, _react.useState)(false);
    const parentRef = (0, _react.useRef)(null);
    const childrenRef = (0, _react.useRef)(null);
    const parentDimensions = (0, _eui.useResizeObserver)(parentRef.current);
    const scaleFn = (0, _react.useMemo)(() => (0, _lodash.throttle)(() => {
      const newScale = computeScale({
        clientHeight: parentDimensions.height,
        clientWidth: parentDimensions.width
      }, childrenRef.current, autoScaleParams === null || autoScaleParams === void 0 ? void 0 : autoScaleParams.minScale);

      // Prevent an infinite render loop
      if (scale !== newScale) {
        setScale(newScale);
      }
      if (parentDimensions.height && parentDimensions.width) {
        setResized(true);
      }
    }), [parentDimensions, setScale, scale, autoScaleParams]);
    (0, _react.useEffect)(() => {
      scaleFn();
    }, [scaleFn]);
    (0, _react.useLayoutEffect)(() => {
      if (resized) {
        renderComplete === null || renderComplete === void 0 ? void 0 : renderComplete();
      }
    }, [renderComplete, resized]);
    return /*#__PURE__*/_react.default.createElement("div", {
      ref: parentRef,
      style: autoScaleParams === null || autoScaleParams === void 0 ? void 0 : autoScaleParams.containerStyles,
      css: _with_auto_scale.autoScaleWrapperStyle
    }, /*#__PURE__*/_react.default.createElement("div", {
      ref: childrenRef,
      style: {
        transform: `scale(${scale || 0})`,
        ...(parentDimensions.width && scale && autoScaleParams !== null && autoScaleParams !== void 0 && autoScaleParams.autoScaleMetricAlignment && (autoScaleParams === null || autoScaleParams === void 0 ? void 0 : autoScaleParams.autoScaleMetricAlignment) !== 'center' ? {
          position: 'relative',
          [autoScaleParams.autoScaleMetricAlignment]: (1 - scale) * parentDimensions.width * scale * -1 // The difference of width after scaled
        } : {})
      }
    }, /*#__PURE__*/_react.default.createElement(WrappedComponent, restProps)));
  };
}