/* *
 *
 *  Plugin for resizing axes / panes in a chart.
 *
 *  (c) 2010-2026 Highsoft AS
 *
 *  Author: Kacper Madej
 *
 *  Integration of this software requires a license.
 *  - For commercial use, see www.highcharts.com/license
 *  - For non-commercial, see www.highcharts.com/license-eula
 *
 *
 * */
'use strict';
import { addEvent, clamp, isNumber, relativeLength } from '../../Shared/Utilities.js';
/* *
 *
 *  Class
 *
 * */
/**
 * The AxisResizer class.
 *
 * @internal
 * @class
 * @name Highcharts.AxisResizer
 *
 * @param {Highcharts.Axis} axis
 *        Main axis for the AxisResizer.
 */
class AxisResizer {
    /* *
     *
     *  Constructor
     *
     * */
    constructor(axis) {
        this.init(axis);
    }
    /* *
     *
     *  Functions
     *
     * */
    /**
     * Initialize the AxisResizer object.
     *
     * @function Highcharts.AxisResizer#init
     *
     * @param {Highcharts.Axis} axis
     *        Main axis for the AxisResizer.
     */
    init(axis, update) {
        this.axis = axis;
        this.options = axis.options.resize || {};
        this.render();
        if (!update) {
            // Add mouse events.
            this.addMouseEvents();
        }
    }
    /**
     * Render the AxisResizer
     *
     * @function Highcharts.AxisResizer#render
     */
    render() {
        const resizer = this, axis = resizer.axis, chart = axis.chart, options = resizer.options, x = options.x || 0, y = options.y, 
        // Normalize control line position according to the plot area
        pos = clamp(axis.top + axis.height + y, chart.plotTop, chart.plotTop + chart.plotHeight);
        let attr = {};
        if (!chart.styledMode) {
            attr = {
                cursor: options.cursor,
                stroke: options.lineColor,
                'stroke-width': options.lineWidth,
                dashstyle: options.lineDashStyle
            };
        }
        // Register current position for future reference.
        resizer.lastPos = pos - y;
        if (!resizer.controlLine) {
            resizer.controlLine = chart.renderer.path()
                .addClass('highcharts-axis-resizer');
        }
        // Add to axisGroup after axis update, because the group is recreated
        // Do .add() before path is calculated because strokeWidth() needs it.
        resizer.controlLine.add(axis.axisGroup);
        const lineWidth = chart.styledMode ?
            resizer.controlLine.strokeWidth() :
            options.lineWidth;
        attr.d = chart.renderer.crispLine([
            ['M', axis.left + x, pos],
            ['L', axis.left + axis.width + x, pos]
        ], lineWidth);
        resizer.controlLine.attr(attr);
    }
    /**
     * Set up the mouse and touch events for the control line.
     *
     * @function Highcharts.AxisResizer#addMouseEvents
     */
    addMouseEvents() {
        const resizer = this, ctrlLineElem = resizer.controlLine.element, container = resizer.axis.chart.container, eventsToUnbind = [];
        let mouseMoveHandler, mouseUpHandler, mouseDownHandler;
        // Create mouse events' handlers.
        // Make them as separate functions to enable wrapping them:
        resizer.mouseMoveHandler = mouseMoveHandler = (e) => (resizer.onMouseMove(e));
        resizer.mouseUpHandler = mouseUpHandler = (e) => (resizer.onMouseUp(e));
        resizer.mouseDownHandler = mouseDownHandler = () => (resizer.onMouseDown());
        eventsToUnbind.push(
        // Add mouse move and mouseup events. These are bind to doc/div,
        // because resizer.grabbed flag is stored in mousedown events.
        addEvent(container, 'mousemove', mouseMoveHandler), addEvent(container.ownerDocument, 'mouseup', mouseUpHandler), addEvent(ctrlLineElem, 'mousedown', mouseDownHandler), 
        // Touch events.
        addEvent(container, 'touchmove', mouseMoveHandler), addEvent(container.ownerDocument, 'touchend', mouseUpHandler), addEvent(ctrlLineElem, 'touchstart', mouseDownHandler));
        resizer.eventsToUnbind = eventsToUnbind;
    }
    /**
     * Mouse move event based on x/y mouse position.
     *
     * @function Highcharts.AxisResizer#onMouseMove
     *
     * @param {Highcharts.PointerEventObject} e
     *        Mouse event.
     */
    onMouseMove(e) {
        /*
         * In iOS, a mousemove event with e.pageX === 0 is fired when holding
         * the finger down in the center of the scrollbar. This should
         * be ignored. Borrowed from Navigator.
         */
        if (!e.touches || e.touches[0].pageX !== 0) {
            const pointer = this.axis.chart.pointer;
            // Drag the control line
            if (this.grabbed && pointer) {
                this.hasDragged = true;
                this.updateAxes(pointer.normalize(e).chartY - (this.options.y || 0));
            }
        }
    }
    /**
     * Mouse up event based on x/y mouse position.
     *
     * @function Highcharts.AxisResizer#onMouseUp
     *
     * @param {Highcharts.PointerEventObject} e
     *        Mouse event.
     */
    onMouseUp(e) {
        const pointer = this.axis.chart.pointer;
        if (this.hasDragged && pointer) {
            this.updateAxes(pointer.normalize(e).chartY - (this.options.y || 0));
        }
        // Restore runPointActions.
        this.grabbed = this.hasDragged = this.axis.chart.activeResizer = void 0;
    }
    /**
     * Mousedown on a control line.
     * Will store necessary information for drag&drop.
     *
     * @function Highcharts.AxisResizer#onMouseDown
     */
    onMouseDown() {
        // Clear all hover effects.
        this.axis.chart.pointer?.reset(false, 0);
        // Disable runPointActions.
        this.grabbed = this.axis.chart.activeResizer = true;
    }
    /**
     * Update all connected axes after a change of control line position
     *
     * @function Highcharts.AxisResizer#updateAxes
     *
     * @param {number} chartY
     */
    updateAxes(chartY) {
        const resizer = this, chart = resizer.axis.chart, axes = resizer.options.controlledAxis, nextAxes = axes.next.length === 0 ?
            [chart.yAxis.indexOf(resizer.axis) + 1] : axes.next, 
        // Main axis is included in the prev array by default
        prevAxes = [resizer.axis].concat(axes.prev), 
        // Prev and next configs
        axesConfigs = [], plotTop = chart.plotTop, plotHeight = chart.plotHeight, plotBottom = plotTop + plotHeight, calculatePercent = (value) => (value * 100 / plotHeight + '%'), normalize = (val, min, max) => (Math.round(clamp(val, min, max)));
        // Normalize chartY to plot area limits
        chartY = clamp(chartY, plotTop, plotBottom);
        let stopDrag = false, yDelta = chartY - resizer.lastPos;
        // Update on changes of at least 1 pixel in the desired direction
        if (yDelta * yDelta < 1) {
            return;
        }
        let isFirst = true;
        // First gather info how axes should behave
        for (const axesGroup of [prevAxes, nextAxes]) {
            for (const axisInfo of axesGroup) {
                // Axes given as array index, axis object or axis id
                const axis = isNumber(axisInfo) ?
                    // If it's a number - it's an index
                    chart.yAxis[axisInfo] :
                    (
                    // If it's first elem. in first group
                    isFirst ?
                        // Then it's an Axis object
                        axisInfo :
                        // Else it should be an id
                        chart.get(axisInfo)), axisOptions = axis && axis.options, optionsToUpdate = {};
                let height, top;
                // Skip if axis is not found
                // or it is navigator's yAxis (#7732)
                if (!axisOptions || axisOptions.isInternal) {
                    isFirst = false;
                    continue;
                }
                top = axis.top;
                const minLength = Math.round(relativeLength(axisOptions.minLength || NaN, plotHeight)), maxLength = Math.round(relativeLength(axisOptions.maxLength || NaN, plotHeight));
                if (!isFirst && axesGroup === nextAxes) {
                    // Try to change height first. yDelta could had changed
                    yDelta = chartY - resizer.lastPos;
                    // Normalize height to option limits
                    height = normalize(axis.len - yDelta, minLength, maxLength);
                    // Adjust top, so the axis looks like shrank from top
                    top = axis.top + yDelta;
                    // Check for plot area limits
                    if (top + height > plotBottom) {
                        const hDelta = plotBottom - height - top;
                        chartY += hDelta;
                        top += hDelta;
                    }
                    // Fit to plot - when overflowing on top
                    if (top < plotTop) {
                        top = plotTop;
                        if (top + height > plotBottom) {
                            height = plotHeight;
                        }
                    }
                    // If next axis meets min length, stop dragging:
                    if (height === minLength) {
                        stopDrag = true;
                    }
                    axesConfigs.push({
                        axis: axis,
                        options: {
                            top: calculatePercent(top - plotTop),
                            height: calculatePercent(height)
                        }
                    });
                }
                else {
                    // Normalize height to option limits
                    height = normalize(chartY - top, minLength, maxLength);
                    // If prev axis meets max length, stop dragging:
                    if (height === maxLength) {
                        stopDrag = true;
                    }
                    // Check axis size limits
                    chartY = top + height;
                    axesConfigs.push({
                        axis: axis,
                        options: {
                            height: calculatePercent(height)
                        }
                    });
                }
                isFirst = false;
                optionsToUpdate.height = height;
            }
        }
        // If we hit the min/maxLength with dragging, don't do anything:
        if (!stopDrag) {
            // Now update axes:
            for (const config of axesConfigs) {
                config.axis.update(config.options, false);
            }
            chart.redraw(false);
        }
    }
    /**
     * Destroy AxisResizer. Clear outside references, clear events,
     * destroy elements, nullify properties.
     *
     * @function Highcharts.AxisResizer#destroy
     */
    destroy() {
        const resizer = this, axis = resizer.axis;
        // Clear resizer in axis
        delete axis.resizer;
        // Clear control line events
        if (this.eventsToUnbind) {
            this.eventsToUnbind.forEach((unbind) => unbind());
        }
        // Destroy AxisResizer elements
        resizer.controlLine.destroy();
        // Nullify properties
        for (const key of Object.keys(resizer)) {
            resizer[key] = null;
        }
    }
}
/* *
 *
 *  Default Export
 *
 * */
/** @internal */
export default AxisResizer;
