import { mix } from '../../utils/mix.mjs';
import { hasTransform } from '../utils/has-transform.mjs';

/**
 * Scales a point based on a factor and an originPoint
 */
function scalePoint(point, scale, originPoint) {
    const distanceFromOrigin = point - originPoint;
    const scaled = scale * distanceFromOrigin;
    return originPoint + scaled;
}
/**
 * Applies a translate/scale delta to a point
 */
function applyPointDelta(point, translate, scale, originPoint, boxScale) {
    if (boxScale !== undefined) {
        point = scalePoint(point, boxScale, originPoint);
    }
    return scalePoint(point, scale, originPoint) + translate;
}
/**
 * Applies a translate/scale delta to an axis
 */
function applyAxisDelta(axis, translate = 0, scale = 1, originPoint, boxScale) {
    axis.min = applyPointDelta(axis.min, translate, scale, originPoint, boxScale);
    axis.max = applyPointDelta(axis.max, translate, scale, originPoint, boxScale);
}
/**
 * Applies a translate/scale delta to a box
 */
function applyBoxDelta(box, { x, y }) {
    applyAxisDelta(box.x, x.translate, x.scale, x.originPoint);
    applyAxisDelta(box.y, y.translate, y.scale, y.originPoint);
}
/**
 * Apply a tree of deltas to a box. We do this to calculate the effect of all the transforms
 * in a tree upon our box before then calculating how to project it into our desired viewport-relative box
 *
 * This is the final nested loop within updateLayoutDelta for future refactoring
 */
function applyTreeDeltas(box, treeScale, treePath, isSharedTransition = false) {
    const treeLength = treePath.length;
    if (!treeLength)
        return;
    // Reset the treeScale
    treeScale.x = treeScale.y = 1;
    let node;
    let delta;
    for (let i = 0; i < treeLength; i++) {
        node = treePath[i];
        delta = node.projectionDelta;
        /**
         * TODO: Prefer to remove this, but currently we have motion components with
         * display: contents in Framer.
         */
        const instance = node.instance;
        if (instance &&
            instance.style &&
            instance.style.display === "contents") {
            continue;
        }
        if (isSharedTransition &&
            node.options.layoutScroll &&
            node.scroll &&
            node !== node.root) {
            transformBox(box, {
                x: -node.scroll.offset.x,
                y: -node.scroll.offset.y,
            });
        }
        if (delta) {
            // Incoporate each ancestor's scale into a culmulative treeScale for this component
            treeScale.x *= delta.x.scale;
            treeScale.y *= delta.y.scale;
            // Apply each ancestor's calculated delta into this component's recorded layout box
            applyBoxDelta(box, delta);
        }
        if (isSharedTransition && hasTransform(node.latestValues)) {
            transformBox(box, node.latestValues);
        }
    }
    /**
     * Snap tree scale back to 1 if it's within a non-perceivable threshold.
     * This will help reduce useless scales getting rendered.
     */
    treeScale.x = snapToDefault(treeScale.x);
    treeScale.y = snapToDefault(treeScale.y);
}
function snapToDefault(scale) {
    if (Number.isInteger(scale))
        return scale;
    return scale > 1.0000000000001 || scale < 0.999999999999 ? scale : 1;
}
function translateAxis(axis, distance) {
    axis.min = axis.min + distance;
    axis.max = axis.max + distance;
}
/**
 * Apply a transform to an axis from the latest resolved motion values.
 * This function basically acts as a bridge between a flat motion value map
 * and applyAxisDelta
 */
function transformAxis(axis, transforms, [key, scaleKey, originKey]) {
    const axisOrigin = transforms[originKey] !== undefined ? transforms[originKey] : 0.5;
    const originPoint = mix(axis.min, axis.max, axisOrigin);
    // Apply the axis delta to the final axis
    applyAxisDelta(axis, transforms[key], transforms[scaleKey], originPoint, transforms.scale);
}
/**
 * The names of the motion values we want to apply as translation, scale and origin.
 */
const xKeys = ["x", "scaleX", "originX"];
const yKeys = ["y", "scaleY", "originY"];
/**
 * Apply a transform to a box from the latest resolved motion values.
 */
function transformBox(box, transform) {
    transformAxis(box.x, transform, xKeys);
    transformAxis(box.y, transform, yKeys);
}

export { applyAxisDelta, applyBoxDelta, applyPointDelta, applyTreeDeltas, scalePoint, transformAxis, transformBox, translateAxis };