/**
 * (c) 2010-2018 Torstein Honsi
 *
 * License: www.highcharts.com/license
 */

'use strict';

import H from '../parts/Globals.js';
import '../parts/Utilities.js';
import '../parts/Axis.js';
import '../parts/Tick.js';
import './Pane.js';

var addEvent = H.addEvent,
    Axis = H.Axis,
    extend = H.extend,
    merge = H.merge,
    noop = H.noop,
    pick = H.pick,
    pInt = H.pInt,
    Tick = H.Tick,
    wrap = H.wrap,
    correctFloat = H.correctFloat,


    hiddenAxisMixin, // @todo Extract this to a new file
    radialAxisMixin, // @todo Extract this to a new file
    axisProto = Axis.prototype,
    tickProto = Tick.prototype;

if (!H.radialAxisExtended) {
    H.radialAxisExtended = true;

    // Augmented methods for the x axis in order to hide it completely, used for
    // the X axis in gauges
    hiddenAxisMixin = {
        getOffset: noop,
        redraw: function () {
            this.isDirty = false; // prevent setting Y axis dirty
        },
        render: function () {
            this.isDirty = false; // prevent setting Y axis dirty
        },
        setScale: noop,
        setCategories: noop,
        setTitle: noop
    };

    // Augmented methods for the value axis
    radialAxisMixin = {

        // The default options extend defaultYAxisOptions
        defaultRadialGaugeOptions: {
            labels: {
                align: 'center',
                x: 0,
                y: null // auto
            },
            minorGridLineWidth: 0,
            minorTickInterval: 'auto',
            minorTickLength: 10,
            minorTickPosition: 'inside',
            minorTickWidth: 1,
            tickLength: 10,
            tickPosition: 'inside',
            tickWidth: 2,
            title: {
                rotation: 0
            },
            zIndex: 2 // behind dials, points in the series group
        },

        // Circular axis around the perimeter of a polar chart
        defaultRadialXOptions: {
            gridLineWidth: 1, // spokes
            labels: {
                align: null, // auto
                distance: 15,
                x: 0,
                y: null, // auto
                style: {
                    textOverflow: 'none' // wrap lines by default (#7248)
                }
            },
            maxPadding: 0,
            minPadding: 0,
            showLastLabel: false,
            tickLength: 0
        },

        // Radial axis, like a spoke in a polar chart
        defaultRadialYOptions: {
            gridLineInterpolation: 'circle',
            labels: {
                align: 'right',
                x: -3,
                y: -2
            },
            showLastLabel: false,
            title: {
                x: 4,
                text: null,
                rotation: 90
            }
        },

        // Merge and set options
        setOptions: function (userOptions) {

            var options = this.options = merge(
                this.defaultOptions,
                this.defaultRadialOptions,
                userOptions
            );

            // Make sure the plotBands array is instanciated for each Axis
            // (#2649)
            if (!options.plotBands) {
                options.plotBands = [];
            }

            H.fireEvent(this, 'afterSetOptions');

        },

        // Wrap the getOffset method to return zero offset for title or labels
        // in a radial axis
        getOffset: function () {
            // Call the Axis prototype method (the method we're in now is on the
            // instance)
            axisProto.getOffset.call(this);

            // Title or label offsets are not counted
            this.chart.axisOffset[this.side] = 0;

        },


        // Get the path for the axis line. This method is also referenced in the
        // getPlotLinePath method.
        getLinePath: function (lineWidth, radius) {
            var center = this.center,
                end,
                chart = this.chart,
                r = pick(radius, center[2] / 2 - this.offset),
                path;

            if (this.isCircular || radius !== undefined) {
                path = this.chart.renderer.symbols.arc(
                    this.left + center[0],
                    this.top + center[1],
                    r,
                    r,
                    {
                        start: this.startAngleRad,
                        end: this.endAngleRad,
                        open: true,
                        innerR: 0
                    }
                );

                // Bounds used to position the plotLine label next to the line
                // (#7117)
                path.xBounds = [this.left + center[0]];
                path.yBounds = [this.top + center[1] - r];

            } else {
                end = this.postTranslate(this.angleRad, r);
                path = [
                    'M',
                    center[0] + chart.plotLeft,
                    center[1] + chart.plotTop,
                    'L',
                    end.x,
                    end.y
                ];
            }
            return path;
        },

        /* *
         * Override setAxisTranslation by setting the translation to the
         * difference in rotation. This allows the translate method to return
         * angle for any given value.
         */
        setAxisTranslation: function () {

            // Call uber method
            axisProto.setAxisTranslation.call(this);

            // Set transA and minPixelPadding
            if (this.center) { // it's not defined the first time
                if (this.isCircular) {

                    this.transA = (this.endAngleRad - this.startAngleRad) /
                        ((this.max - this.min) || 1);


                } else {
                    this.transA = (
                        (this.center[2] / 2) /
                        ((this.max - this.min) || 1)
                    );
                }

                if (this.isXAxis) {
                    this.minPixelPadding = this.transA * this.minPointOffset;
                } else {
                    // This is a workaround for regression #2593, but categories
                    // still don't position correctly.
                    this.minPixelPadding = 0;
                }
            }
        },

        /* *
         * In case of auto connect, add one closestPointRange to the max value
         * right before tickPositions are computed, so that ticks will extend
         * passed the real max.
         */
        beforeSetTickPositions: function () {
            // If autoConnect is true, polygonal grid lines are connected, and
            // one closestPointRange is added to the X axis to prevent the last
            // point from overlapping the first.
            this.autoConnect = (
                this.isCircular &&
                pick(this.userMax, this.options.max) === undefined &&
                correctFloat(this.endAngleRad - this.startAngleRad) ===
                correctFloat(2 * Math.PI)
            );

            if (this.autoConnect) {
                this.max += (
                    (this.categories && 1) ||
                    this.pointRange ||
                    this.closestPointRange ||
                    0
                ); // #1197, #2260
            }
        },

        /* *
         * Override the setAxisSize method to use the arc's circumference as
         * length. This allows tickPixelInterval to apply to pixel lengths along
         * the perimeter
         */
        setAxisSize: function () {

            axisProto.setAxisSize.call(this);

            if (this.isRadial) {

                // Set the center array
                this.pane.updateCenter(this);

                // The sector is used in Axis.translate to compute the
                // translation of reversed axis points (#2570)
                if (this.isCircular) {
                    this.sector = this.endAngleRad - this.startAngleRad;
                }

                // Axis len is used to lay out the ticks
                this.len = this.width = this.height =
                    this.center[2] * pick(this.sector, 1) / 2;

            }
        },

        /* *
         * Returns the x, y coordinate of a point given by a value and a pixel
         * distance from center
         */
        getPosition: function (value, length) {
            return this.postTranslate(
                this.isCircular ?
                    this.translate(value) :
                    this.angleRad, // #2848
                pick(
                    this.isCircular ? length : this.translate(value),
                    this.center[2] / 2
                ) - this.offset
            );
        },

        /* *
         * Translate from intermediate plotX (angle), plotY (axis.len - radius)
         * to final chart coordinates.
         */
        postTranslate: function (angle, radius) {

            var chart = this.chart,
                center = this.center;

            angle = this.startAngleRad + angle;

            return {
                x: chart.plotLeft + center[0] + Math.cos(angle) * radius,
                y: chart.plotTop + center[1] + Math.sin(angle) * radius
            };

        },

        /* *
         * Find the path for plot bands along the radial axis
         */
        getPlotBandPath: function (from, to, options) {
            var center = this.center,
                startAngleRad = this.startAngleRad,
                fullRadius = center[2] / 2,
                radii = [
                    pick(options.outerRadius, '100%'),
                    options.innerRadius,
                    pick(options.thickness, 10)
                ],
                offset = Math.min(this.offset, 0),
                percentRegex = /%$/,
                start,
                end,
                open,
                isCircular = this.isCircular, // X axis in a polar chart
                ret;

            // Polygonal plot bands
            if (this.options.gridLineInterpolation === 'polygon') {
                ret = this.getPlotLinePath(from).concat(
                    this.getPlotLinePath(to, true)
                );

            // Circular grid bands
            } else {

                // Keep within bounds
                from = Math.max(from, this.min);
                to = Math.min(to, this.max);

                // Plot bands on Y axis (radial axis) - inner and outer radius
                // depend on to and from
                if (!isCircular) {
                    radii[0] = this.translate(from);
                    radii[1] = this.translate(to);
                }

                // Convert percentages to pixel values
                radii = radii.map(function (radius) {
                    if (percentRegex.test(radius)) {
                        radius = (pInt(radius, 10) * fullRadius) / 100;
                    }
                    return radius;
                });

                // Handle full circle
                if (options.shape === 'circle' || !isCircular) {
                    start = -Math.PI / 2;
                    end = Math.PI * 1.5;
                    open = true;
                } else {
                    start = startAngleRad + this.translate(from);
                    end = startAngleRad + this.translate(to);
                }

                radii[0] -= offset; // #5283
                radii[2] -= offset; // #5283

                ret = this.chart.renderer.symbols.arc(
                    this.left + center[0],
                    this.top + center[1],
                    radii[0],
                    radii[0],
                    {
                        // Math is for reversed yAxis (#3606)
                        start: Math.min(start, end),
                        end: Math.max(start, end),
                        innerR: pick(radii[1], radii[0] - radii[2]),
                        open: open
                    }
                );
            }

            return ret;
        },

        /* *
         * Find the path for plot lines perpendicular to the radial axis.
         */
        getPlotLinePath: function (value, reverse) {
            var axis = this,
                center = axis.center,
                chart = axis.chart,
                end = axis.getPosition(value),
                xAxis,
                xy,
                tickPositions,
                ret;

            // Spokes
            if (axis.isCircular) {
                ret = [
                    'M',
                    center[0] + chart.plotLeft,
                    center[1] + chart.plotTop,
                    'L',
                    end.x,
                    end.y
                ];

            // Concentric circles
            } else if (axis.options.gridLineInterpolation === 'circle') {
                value = axis.translate(value);

                // a value of 0 is in the center, so it won't be visible,
                // but draw it anyway for update and animation (#2366)
                ret = axis.getLinePath(0, value);
            // Concentric polygons
            } else {
                // Find the X axis in the same pane
                chart.xAxis.forEach(function (a) {
                    if (a.pane === axis.pane) {
                        xAxis = a;
                    }
                });
                ret = [];
                value = axis.translate(value);
                tickPositions = xAxis.tickPositions;
                if (xAxis.autoConnect) {
                    tickPositions = tickPositions.concat([tickPositions[0]]);
                }
                // Reverse the positions for concatenation of polygonal plot
                // bands
                if (reverse) {
                    tickPositions = [].concat(tickPositions).reverse();
                }

                tickPositions.forEach(function (pos, i) {
                    xy = xAxis.getPosition(pos, value);
                    ret.push(i ? 'L' : 'M', xy.x, xy.y);
                });

            }
            return ret;
        },

        /* *
         * Find the position for the axis title, by default inside the gauge
         */
        getTitlePosition: function () {
            var center = this.center,
                chart = this.chart,
                titleOptions = this.options.title;

            return {
                x: chart.plotLeft + center[0] + (titleOptions.x || 0),
                y: (
                    chart.plotTop +
                    center[1] -
                    (
                        {
                            high: 0.5,
                            middle: 0.25,
                            low: 0
                        }[titleOptions.align] * center[2]
                    ) +
                    (titleOptions.y || 0)
                )
            };
        }

    };

    // Actions before axis init.
    addEvent(Axis, 'init', function (e) {
        var chart = this.chart,
            angular = chart.angular,
            polar = chart.polar,
            isX = this.isXAxis,
            isHidden = angular && isX,
            isCircular,
            chartOptions = chart.options,
            paneIndex = e.userOptions.pane || 0,
            pane = this.pane = chart.pane && chart.pane[paneIndex];

        // Before prototype.init
        if (angular) {
            extend(this, isHidden ? hiddenAxisMixin : radialAxisMixin);
            isCircular = !isX;
            if (isCircular) {
                this.defaultRadialOptions = this.defaultRadialGaugeOptions;
            }

        } else if (polar) {
            extend(this, radialAxisMixin);
            isCircular = isX;
            this.defaultRadialOptions = isX ?
                this.defaultRadialXOptions :
                merge(this.defaultYAxisOptions, this.defaultRadialYOptions);

        }

        // Disable certain features on angular and polar axes
        if (angular || polar) {
            this.isRadial = true;
            chart.inverted = false;
            chartOptions.chart.zoomType = null;
        } else {
            this.isRadial = false;
        }

        // A pointer back to this axis to borrow geometry
        if (pane && isCircular) {
            pane.axis = this;
        }

        this.isCircular = isCircular;

    });

    addEvent(Axis, 'afterInit', function () {

        var chart = this.chart,
            options = this.options,
            isHidden = chart.angular && this.isXAxis,
            pane = this.pane,
            paneOptions = pane && pane.options;

        if (!isHidden && pane && (chart.angular || chart.polar)) {

            // Start and end angle options are
            // given in degrees relative to top, while internal computations are
            // in radians relative to right (like SVG).

            // Y axis in polar charts
            this.angleRad = (options.angle || 0) * Math.PI / 180;
            // Gauges
            this.startAngleRad = (paneOptions.startAngle - 90) * Math.PI / 180;
            this.endAngleRad = (
                pick(paneOptions.endAngle, paneOptions.startAngle + 360) - 90
            ) * Math.PI / 180; // Gauges
            this.offset = options.offset || 0;

        }

    });

    /* *
     * Wrap auto label align to avoid setting axis-wide rotation on radial axes
     * (#4920)
     * @param   {Function} proceed
     * @returns {String} Alignment
     */
    wrap(axisProto, 'autoLabelAlign', function (proceed) {
        if (!this.isRadial) {
            return proceed.apply(this, [].slice.call(arguments, 1));
        } // else return undefined
    });

    // Add special cases within the Tick class' methods for radial axes.
    addEvent(Tick, 'afterGetPosition', function (e) {
        if (this.axis.getPosition) {
            extend(e.pos, this.axis.getPosition(this.pos));
        }
    });

    // Find the center position of the label based on the distance option.
    addEvent(Tick, 'afterGetLabelPosition', function (e) {
        var axis = this.axis,
            label = this.label,
            labelOptions = axis.options.labels,
            optionsY = labelOptions.y,
            ret,
            centerSlot = 20, // 20 degrees to each side at the top and bottom
            align = labelOptions.align,
            angle = (
                (axis.translate(this.pos) + axis.startAngleRad + Math.PI / 2) /
                Math.PI * 180
            ) % 360;

        if (axis.isRadial) { // Both X and Y axes in a polar chart
            ret = axis.getPosition(this.pos, (axis.center[2] / 2) +
                pick(labelOptions.distance, -25));

            // Automatically rotated
            if (labelOptions.rotation === 'auto') {
                label.attr({
                    rotation: angle
                });

            // Vertically centered
            } else if (optionsY === null) {
                optionsY = (
                    axis.chart.renderer
                        .fontMetrics(label.styles && label.styles.fontSize).b -
                    label.getBBox().height / 2
                );
            }

            // Automatic alignment
            if (align === null) {
                if (axis.isCircular) { // Y axis
                    if (
                        this.label.getBBox().width >
                        axis.len * axis.tickInterval / (axis.max - axis.min)
                    ) { // #3506
                        centerSlot = 0;
                    }
                    if (angle > centerSlot && angle < 180 - centerSlot) {
                        align = 'left'; // right hemisphere
                    } else if (
                        angle > 180 + centerSlot &&
                        angle < 360 - centerSlot
                    ) {
                        align = 'right'; // left hemisphere
                    } else {
                        align = 'center'; // top or bottom
                    }
                } else {
                    align = 'center';
                }
                label.attr({
                    align: align
                });
            }

            e.pos.x = ret.x + labelOptions.x;
            e.pos.y = ret.y + optionsY;

        }
    });

    // Wrap the getMarkPath function to return the path of the radial marker
    wrap(tickProto, 'getMarkPath', function (
        proceed,
        x,
        y,
        tickLength,
        tickWidth,
        horiz,
        renderer
    ) {
        var axis = this.axis,
            endPoint,
            ret;

        if (axis.isRadial) {
            endPoint = axis.getPosition(
                this.pos,
                axis.center[2] / 2 + tickLength
            );
            ret = [
                'M',
                x,
                y,
                'L',
                endPoint.x,
                endPoint.y
            ];
        } else {
            ret = proceed.call(
                this,
                x,
                y,
                tickLength,
                tickWidth,
                horiz,
                renderer
            );
        }
        return ret;
    });
}