package com.github.mikephil.charting.renderer;

import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;

import com.github.mikephil.charting.charts.RadarChart;
import com.github.mikephil.charting.components.XAxis;
import com.github.mikephil.charting.utils.MPPointF;
import com.github.mikephil.charting.utils.Utils;
import com.github.mikephil.charting.utils.ViewPortHandler;

public class XAxisRendererRadarChart extends XAxisRenderer {

    private RadarChart mChart;

    public XAxisRendererRadarChart(ViewPortHandler viewPortHandler, XAxis xAxis, RadarChart chart) {
        super(viewPortHandler, xAxis, null);

        mChart = chart;
    }

    @Override
    public void renderAxisLabels(Canvas c) {

        if (!mXAxis.isEnabled() || !mXAxis.isDrawLabelsEnabled())
            return;

        final float labelRotationAngleDegrees = mXAxis.getLabelRotationAngle();
        final MPPointF drawLabelAnchor = MPPointF.getInstance(0.5f, 0.25f);

        mAxisLabelPaint.setTypeface(mXAxis.getTypeface());
        mAxisLabelPaint.setTextSize(mXAxis.getTextSize());
        mAxisLabelPaint.setColor(mXAxis.getTextColor());

        float sliceangle = mChart.getSliceAngle();

        // calculate the factor that is needed for transforming the value to
        // pixels
        float factor = mChart.getFactor();

        MPPointF center = mChart.getCenterOffsets();
        MPPointF pOut = MPPointF.getInstance(0, 0);

        //定义背景paint
        Paint paint = new Paint();
        paint.setColor(mXAxis.getXAxisBackground());

        for (int i = 0; i < mChart.getData().getMaxEntryCountSet().getEntryCount(); i++) {

            String label = mXAxis.getValueFormatter().getFormattedValue(i, mXAxis);

            float angle = (sliceangle * i + mChart.getRotationAngle()) % 360f;

            Utils.getPosition(center, mChart.getYRange() * factor + mXAxis.mLabelRotatedWidth / 2f, angle, pOut);

            //绘制文字的圆角矩形
            RectF rectF = new RectF(pOut.x - mXAxis.mLabelWidth / 2 - 10,
                    pOut.y - mXAxis.mLabelHeight - 5,
                    pOut.x + mXAxis.mLabelWidth / 2 + 10,
                    pOut.y + mXAxis.mLabelHeight - 2 );
            c.drawRoundRect( rectF, 10f, 10f, paint);

            drawLabel(c, label, pOut.x, pOut.y - mXAxis.mLabelRotatedHeight / 2.f, drawLabelAnchor, labelRotationAngleDegrees);
        }

        MPPointF.recycleInstance(center);
        MPPointF.recycleInstance(pOut);
        MPPointF.recycleInstance(drawLabelAnchor);
    }

    /**
     * XAxis LimitLines on RadarChart not yet supported.
     *
     * @param c
     */
    @Override
    public void renderLimitLines(Canvas c) {
        // this space intentionally left blank
    }
}