'use strict';

const utils_assert = require('./assert.cjs');
const utils_compare = require('./compare.cjs');
const utils_resizePanel = require('./resizePanel.cjs');

function validatePanelGroupLayout({
  layout: prevLayout,
  panelConstraints
}) {
  const nextLayout = [...prevLayout];
  const nextLayoutTotalSize = nextLayout.reduce(
    (accumulated, current) => accumulated + current,
    0
  );
  if (nextLayout.length !== panelConstraints.length) {
    throw new Error(
      `Invalid ${panelConstraints.length} panel layout: ${nextLayout.map((size) => `${size}%`).join(", ")}`
    );
  } else if (!utils_compare.fuzzyNumbersEqual(nextLayoutTotalSize, 100)) {
    {
      console.warn(
        `WARNING: Invalid layout total size: ${nextLayout.map((size) => `${size}%`).join(", ")}. Layout normalization will be applied.`
      );
    }
    for (let index = 0; index < panelConstraints.length; index++) {
      const unsafeSize = nextLayout[index];
      utils_assert.assert(unsafeSize != null);
      const safeSize = 100 / nextLayoutTotalSize * unsafeSize;
      nextLayout[index] = safeSize;
    }
  }
  let remainingSize = 0;
  for (let index = 0; index < panelConstraints.length; index++) {
    const unsafeSize = nextLayout[index];
    utils_assert.assert(unsafeSize != null);
    const safeSize = utils_resizePanel.resizePanel({
      panelConstraints,
      panelIndex: index,
      size: unsafeSize
    });
    if (unsafeSize !== safeSize) {
      remainingSize += unsafeSize - safeSize;
      nextLayout[index] = safeSize;
    }
  }
  if (!utils_compare.fuzzyNumbersEqual(remainingSize, 0)) {
    for (let index = 0; index < panelConstraints.length; index++) {
      const prevSize = nextLayout[index];
      utils_assert.assert(prevSize != null);
      const unsafeSize = prevSize + remainingSize;
      const safeSize = utils_resizePanel.resizePanel({
        panelConstraints,
        panelIndex: index,
        size: unsafeSize
      });
      if (prevSize !== safeSize) {
        remainingSize -= safeSize - prevSize;
        nextLayout[index] = safeSize;
        if (utils_compare.fuzzyNumbersEqual(remainingSize, 0))
          break;
      }
    }
  }
  return nextLayout;
}

exports.validatePanelGroupLayout = validatePanelGroupLayout;
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