import {
  lineStringLength
} from "./chunk-JFXZSSOM.js";
import {
  assignClosestPoint,
  douglasPeucker,
  inflateCoordinates,
  maxSquaredDelta
} from "./chunk-NLIGXLAR.js";
import {
  forEach,
  intersectsLineString
} from "./chunk-YUSNUQO6.js";
import {
  SimpleGeometry_default,
  deflateCoordinates
} from "./chunk-YUTQGDGI.js";
import {
  lerp
} from "./chunk-54BTDBAD.js";
import {
  closestSquaredDistanceXY
} from "./chunk-CKDBVGKM.js";
import {
  binarySearch,
  extend
} from "./chunk-FQY6EMA7.js";

// node_modules/ol/geom/flat/interpolate.js
function interpolatePoint(flatCoordinates, offset, end, stride, fraction, dest, dimension) {
  let o, t;
  const n = (end - offset) / stride;
  if (n === 1) {
    o = offset;
  } else if (n === 2) {
    o = offset;
    t = fraction;
  } else if (n !== 0) {
    let x1 = flatCoordinates[offset];
    let y1 = flatCoordinates[offset + 1];
    let length = 0;
    const cumulativeLengths = [0];
    for (let i = offset + stride; i < end; i += stride) {
      const x2 = flatCoordinates[i];
      const y2 = flatCoordinates[i + 1];
      length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
      cumulativeLengths.push(length);
      x1 = x2;
      y1 = y2;
    }
    const target = fraction * length;
    const index = binarySearch(cumulativeLengths, target);
    if (index < 0) {
      t = (target - cumulativeLengths[-index - 2]) / (cumulativeLengths[-index - 1] - cumulativeLengths[-index - 2]);
      o = offset + (-index - 2) * stride;
    } else {
      o = offset + index * stride;
    }
  }
  dimension = dimension > 1 ? dimension : 2;
  dest = dest ? dest : new Array(dimension);
  for (let i = 0; i < dimension; ++i) {
    dest[i] = o === void 0 ? NaN : t === void 0 ? flatCoordinates[o + i] : lerp(flatCoordinates[o + i], flatCoordinates[o + stride + i], t);
  }
  return dest;
}
function lineStringCoordinateAtM(flatCoordinates, offset, end, stride, m, extrapolate) {
  if (end == offset) {
    return null;
  }
  let coordinate;
  if (m < flatCoordinates[offset + stride - 1]) {
    if (extrapolate) {
      coordinate = flatCoordinates.slice(offset, offset + stride);
      coordinate[stride - 1] = m;
      return coordinate;
    }
    return null;
  }
  if (flatCoordinates[end - 1] < m) {
    if (extrapolate) {
      coordinate = flatCoordinates.slice(end - stride, end);
      coordinate[stride - 1] = m;
      return coordinate;
    }
    return null;
  }
  if (m == flatCoordinates[offset + stride - 1]) {
    return flatCoordinates.slice(offset, offset + stride);
  }
  let lo = offset / stride;
  let hi = end / stride;
  while (lo < hi) {
    const mid = lo + hi >> 1;
    if (m < flatCoordinates[(mid + 1) * stride - 1]) {
      hi = mid;
    } else {
      lo = mid + 1;
    }
  }
  const m0 = flatCoordinates[lo * stride - 1];
  if (m == m0) {
    return flatCoordinates.slice((lo - 1) * stride, (lo - 1) * stride + stride);
  }
  const m1 = flatCoordinates[(lo + 1) * stride - 1];
  const t = (m - m0) / (m1 - m0);
  coordinate = [];
  for (let i = 0; i < stride - 1; ++i) {
    coordinate.push(
      lerp(
        flatCoordinates[(lo - 1) * stride + i],
        flatCoordinates[lo * stride + i],
        t
      )
    );
  }
  coordinate.push(m);
  return coordinate;
}
function lineStringsCoordinateAtM(flatCoordinates, offset, ends, stride, m, extrapolate, interpolate) {
  if (interpolate) {
    return lineStringCoordinateAtM(
      flatCoordinates,
      offset,
      ends[ends.length - 1],
      stride,
      m,
      extrapolate
    );
  }
  let coordinate;
  if (m < flatCoordinates[stride - 1]) {
    if (extrapolate) {
      coordinate = flatCoordinates.slice(0, stride);
      coordinate[stride - 1] = m;
      return coordinate;
    }
    return null;
  }
  if (flatCoordinates[flatCoordinates.length - 1] < m) {
    if (extrapolate) {
      coordinate = flatCoordinates.slice(flatCoordinates.length - stride);
      coordinate[stride - 1] = m;
      return coordinate;
    }
    return null;
  }
  for (let i = 0, ii = ends.length; i < ii; ++i) {
    const end = ends[i];
    if (offset == end) {
      continue;
    }
    if (m < flatCoordinates[offset + stride - 1]) {
      return null;
    }
    if (m <= flatCoordinates[end - 1]) {
      return lineStringCoordinateAtM(
        flatCoordinates,
        offset,
        end,
        stride,
        m,
        false
      );
    }
    offset = end;
  }
  return null;
}

// node_modules/ol/geom/LineString.js
var LineString = class _LineString extends SimpleGeometry_default {
  /**
   * @param {Array<import("../coordinate.js").Coordinate>|Array<number>} coordinates Coordinates.
   *     For internal use, flat coordinates in combination with `layout` are also accepted.
   * @param {import("./Geometry.js").GeometryLayout} [layout] Layout.
   */
  constructor(coordinates, layout) {
    super();
    this.flatMidpoint_ = null;
    this.flatMidpointRevision_ = -1;
    this.maxDelta_ = -1;
    this.maxDeltaRevision_ = -1;
    if (layout !== void 0 && !Array.isArray(coordinates[0])) {
      this.setFlatCoordinates(
        layout,
        /** @type {Array<number>} */
        coordinates
      );
    } else {
      this.setCoordinates(
        /** @type {Array<import("../coordinate.js").Coordinate>} */
        coordinates,
        layout
      );
    }
  }
  /**
   * Append the passed coordinate to the coordinates of the linestring.
   * @param {import("../coordinate.js").Coordinate} coordinate Coordinate.
   * @api
   */
  appendCoordinate(coordinate) {
    extend(this.flatCoordinates, coordinate);
    this.changed();
  }
  /**
   * Make a complete copy of the geometry.
   * @return {!LineString} Clone.
   * @api
   * @override
   */
  clone() {
    const lineString = new _LineString(
      this.flatCoordinates.slice(),
      this.layout
    );
    lineString.applyProperties(this);
    return lineString;
  }
  /**
   * @param {number} x X.
   * @param {number} y Y.
   * @param {import("../coordinate.js").Coordinate} closestPoint Closest point.
   * @param {number} minSquaredDistance Minimum squared distance.
   * @return {number} Minimum squared distance.
   * @override
   */
  closestPointXY(x, y, closestPoint, minSquaredDistance) {
    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {
      return minSquaredDistance;
    }
    if (this.maxDeltaRevision_ != this.getRevision()) {
      this.maxDelta_ = Math.sqrt(
        maxSquaredDelta(
          this.flatCoordinates,
          0,
          this.flatCoordinates.length,
          this.stride,
          0
        )
      );
      this.maxDeltaRevision_ = this.getRevision();
    }
    return assignClosestPoint(
      this.flatCoordinates,
      0,
      this.flatCoordinates.length,
      this.stride,
      this.maxDelta_,
      false,
      x,
      y,
      closestPoint,
      minSquaredDistance
    );
  }
  /**
   * Iterate over each segment, calling the provided callback.
   * If the callback returns a truthy value the function returns that
   * value immediately. Otherwise the function returns `false`.
   *
   * @param {function(this: S, import("../coordinate.js").Coordinate, import("../coordinate.js").Coordinate): T} callback Function
   *     called for each segment. The function will receive two arguments, the start and end coordinates of the segment.
   * @return {T|boolean} Value.
   * @template T,S
   * @api
   */
  forEachSegment(callback) {
    return forEach(
      this.flatCoordinates,
      0,
      this.flatCoordinates.length,
      this.stride,
      callback
    );
  }
  /**
   * Returns the coordinate at `m` using linear interpolation, or `null` if no
   * such coordinate exists.
   *
   * `extrapolate` controls extrapolation beyond the range of Ms in the
   * MultiLineString. If `extrapolate` is `true` then Ms less than the first
   * M will return the first coordinate and Ms greater than the last M will
   * return the last coordinate.
   *
   * @param {number} m M.
   * @param {boolean} [extrapolate] Extrapolate. Default is `false`.
   * @return {import("../coordinate.js").Coordinate|null} Coordinate.
   * @api
   */
  getCoordinateAtM(m, extrapolate) {
    if (this.layout != "XYM" && this.layout != "XYZM") {
      return null;
    }
    extrapolate = extrapolate !== void 0 ? extrapolate : false;
    return lineStringCoordinateAtM(
      this.flatCoordinates,
      0,
      this.flatCoordinates.length,
      this.stride,
      m,
      extrapolate
    );
  }
  /**
   * Return the coordinates of the linestring.
   * @return {Array<import("../coordinate.js").Coordinate>} Coordinates.
   * @api
   * @override
   */
  getCoordinates() {
    return inflateCoordinates(
      this.flatCoordinates,
      0,
      this.flatCoordinates.length,
      this.stride
    );
  }
  /**
   * Return the coordinate at the provided fraction along the linestring.
   * The `fraction` is a number between 0 and 1, where 0 is the start of the
   * linestring and 1 is the end.
   * @param {number} fraction Fraction.
   * @param {import("../coordinate.js").Coordinate} [dest] Optional coordinate whose values will
   *     be modified. If not provided, a new coordinate will be returned.
   * @return {import("../coordinate.js").Coordinate} Coordinate of the interpolated point.
   * @api
   */
  getCoordinateAt(fraction, dest) {
    return interpolatePoint(
      this.flatCoordinates,
      0,
      this.flatCoordinates.length,
      this.stride,
      fraction,
      dest,
      this.stride
    );
  }
  /**
   * Return the length of the linestring on projected plane.
   * @return {number} Length (on projected plane).
   * @api
   */
  getLength() {
    return lineStringLength(
      this.flatCoordinates,
      0,
      this.flatCoordinates.length,
      this.stride
    );
  }
  /**
   * @return {Array<number>} Flat midpoint.
   */
  getFlatMidpoint() {
    if (this.flatMidpointRevision_ != this.getRevision()) {
      this.flatMidpoint_ = this.getCoordinateAt(
        0.5,
        this.flatMidpoint_ ?? void 0
      );
      this.flatMidpointRevision_ = this.getRevision();
    }
    return (
      /** @type {Array<number>} */
      this.flatMidpoint_
    );
  }
  /**
   * @param {number} squaredTolerance Squared tolerance.
   * @return {LineString} Simplified LineString.
   * @protected
   * @override
   */
  getSimplifiedGeometryInternal(squaredTolerance) {
    const simplifiedFlatCoordinates = [];
    simplifiedFlatCoordinates.length = douglasPeucker(
      this.flatCoordinates,
      0,
      this.flatCoordinates.length,
      this.stride,
      squaredTolerance,
      simplifiedFlatCoordinates,
      0
    );
    return new _LineString(simplifiedFlatCoordinates, "XY");
  }
  /**
   * Get the type of this geometry.
   * @return {import("./Geometry.js").Type} Geometry type.
   * @api
   * @override
   */
  getType() {
    return "LineString";
  }
  /**
   * Test if the geometry and the passed extent intersect.
   * @param {import("../extent.js").Extent} extent Extent.
   * @return {boolean} `true` if the geometry and the extent intersect.
   * @api
   * @override
   */
  intersectsExtent(extent) {
    return intersectsLineString(
      this.flatCoordinates,
      0,
      this.flatCoordinates.length,
      this.stride,
      extent,
      this.getExtent()
    );
  }
  /**
   * Set the coordinates of the linestring.
   * @param {!Array<import("../coordinate.js").Coordinate>} coordinates Coordinates.
   * @param {import("./Geometry.js").GeometryLayout} [layout] Layout.
   * @api
   * @override
   */
  setCoordinates(coordinates, layout) {
    this.setLayout(layout, coordinates, 1);
    if (!this.flatCoordinates) {
      this.flatCoordinates = [];
    }
    this.flatCoordinates.length = deflateCoordinates(
      this.flatCoordinates,
      0,
      coordinates,
      this.stride
    );
    this.changed();
  }
};
var LineString_default = LineString;

export {
  interpolatePoint,
  lineStringsCoordinateAtM,
  LineString_default
};
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