import {
  WORKER_OFFSCREEN_CANVAS
} from "./chunk-5XHD7RSF.js";
import {
  __publicField
} from "./chunk-DC5AMYBS.js";

// node_modules/ol/dom.js
function createCanvasContext2D(width, height, canvasPool, settings) {
  let canvas;
  if (canvasPool && canvasPool.length) {
    canvas = /** @type {HTMLCanvasElement} */
    canvasPool.shift();
  } else if (WORKER_OFFSCREEN_CANVAS) {
    canvas = new class extends OffscreenCanvas {
      constructor() {
        super(...arguments);
        __publicField(this, "style", {});
      }
    }(width ?? 300, height ?? 150);
  } else {
    canvas = document.createElement("canvas");
  }
  if (width) {
    canvas.width = width;
  }
  if (height) {
    canvas.height = height;
  }
  return (
    /** @type {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} */
    canvas.getContext("2d", settings)
  );
}
var sharedCanvasContext;
function getSharedCanvasContext2D() {
  if (!sharedCanvasContext) {
    sharedCanvasContext = createCanvasContext2D(1, 1);
  }
  return sharedCanvasContext;
}
function releaseCanvas(context) {
  const canvas = context.canvas;
  canvas.width = 1;
  canvas.height = 1;
  context.clearRect(0, 0, 1, 1);
}
function outerWidth(element) {
  let width = element.offsetWidth;
  const style = getComputedStyle(element);
  width += parseInt(style.marginLeft, 10) + parseInt(style.marginRight, 10);
  return width;
}
function outerHeight(element) {
  let height = element.offsetHeight;
  const style = getComputedStyle(element);
  height += parseInt(style.marginTop, 10) + parseInt(style.marginBottom, 10);
  return height;
}
function replaceNode(newNode, oldNode) {
  const parent = oldNode.parentNode;
  if (parent) {
    parent.replaceChild(newNode, oldNode);
  }
}
function removeChildren(node) {
  while (node.lastChild) {
    node.lastChild.remove();
  }
}
function replaceChildren(node, children) {
  const oldChildren = node.childNodes;
  for (let i = 0; true; ++i) {
    const oldChild = oldChildren[i];
    const newChild = children[i];
    if (!oldChild && !newChild) {
      break;
    }
    if (oldChild === newChild) {
      continue;
    }
    if (!oldChild) {
      node.appendChild(newChild);
      continue;
    }
    if (!newChild) {
      node.removeChild(oldChild);
      --i;
      continue;
    }
    node.insertBefore(newChild, oldChild);
  }
}
function createMockDiv() {
  const mockedDiv = new Proxy(
    {
      /**
       * @type {Array<HTMLElement>}
       */
      childNodes: [],
      /**
       * @param {HTMLElement} node html node.
       * @return {HTMLElement} html node.
       */
      appendChild: function(node) {
        this.childNodes.push(node);
        return node;
      },
      /**
       * dummy function, as this structure is not supposed to have a parent.
       */
      remove: function() {
      },
      /**
       * @param {HTMLElement} node html node.
       * @return {HTMLElement} html node.
       */
      removeChild: function(node) {
        const index = this.childNodes.indexOf(node);
        if (index === -1) {
          throw new Error("Node to remove was not found");
        }
        this.childNodes.splice(index, 1);
        return node;
      },
      /**
       * @param {HTMLElement} newNode new html node.
       * @param {HTMLElement} referenceNode reference html node.
       * @return {HTMLElement} new html node.
       */
      insertBefore: function(newNode, referenceNode) {
        const index = this.childNodes.indexOf(referenceNode);
        if (index === -1) {
          throw new Error("Reference node not found");
        }
        this.childNodes.splice(index, 0, newNode);
        return newNode;
      },
      style: {}
    },
    {
      get(target, prop, receiver) {
        if (prop === "firstElementChild") {
          return target.childNodes.length > 0 ? target.childNodes[0] : null;
        }
        return Reflect.get(target, prop, receiver);
      }
    }
  );
  return (
    /** @type {HTMLDivElement} */
    /** @type {*} */
    mockedDiv
  );
}
function isCanvas(obj) {
  return typeof HTMLCanvasElement !== "undefined" && obj instanceof HTMLCanvasElement || typeof OffscreenCanvas !== "undefined" && obj instanceof OffscreenCanvas;
}

export {
  createCanvasContext2D,
  getSharedCanvasContext2D,
  releaseCanvas,
  outerWidth,
  outerHeight,
  replaceNode,
  removeChildren,
  replaceChildren,
  createMockDiv,
  isCanvas
};
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