package com.tejia.lijin.app.util;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;

import com.tejia.lijin.app.R;

import java.text.DecimalFormat;

/**
 * 限时秒杀进度条
 */
public class SaleProgressView extends View {
    //商品总数
    private int totalCount;
    //当前卖出数
    private int currentCount;
    //动画需要的
    private int progressCount;
    //售出比例
    private float scale;
    //边框颜色
    private int sideColor;
    //文字颜色
//    private int textColor;
    //边框粗细
    private float sideWidth;
    //边框所在的矩形
    private Paint sidePaint;
    //背景矩形
    private RectF bgRectF;
    private float radius;
    private int width;
    private int height;
    private PorterDuffXfermode mPorterDuffXfermode;//设置混合模式
    private Paint srcPaint;
    private Bitmap fgSrc;
    private Bitmap bgSrc;

//    private String nearOverText;//即将售罄
//    private String overText;//已售罄
//    private float textSize;

    //    private Paint textPaint;
//    private float nearOverTextWidth;
//    private float overTextWidth;
    private float baseLineY;
    private Bitmap bgBitmap;
    private boolean isNeedAnim;

    public SaleProgressView(Context context) {
        this(context, null);
    }

    public SaleProgressView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initAttrs(context, attrs);
        initPaint();
    }

    private void initAttrs(Context context, AttributeSet attrs) {
//        TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.SaleProgressView);
//        sideColor = ta.getColor(R.styleable.SaleProgressView_sideColor, 0xffff3c32);
//        --textColor = ta.getColor(R.styleable.SaleProgressView_textColor, 0xffff3c32);
//        sideWidth = ta.getDimension(R.styleable.SaleProgressView_sideWidth, dp2px(2));
//        --overText = ta.getString(R.styleable.SaleProgressView_overText);//已售罄
//        --nearOverText = ta.getString(R.styleable.SaleProgressView_nearOverText);//即将售罄
//        --textSize = ta.getDimension(R.styleable.SaleProgressView_textSize, sp2px(16));
//        isNeedAnim = ta.getBoolean(R.styleable.SaleProgressView_isNeedAnim, true);
//        ta.recycle();
    }

    private void initPaint() {
        sidePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        sidePaint.setStyle(Paint.Style.STROKE);
        sidePaint.setStrokeWidth(sideWidth);
        sidePaint.setColor(sideColor);

        srcPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

//        textPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
//        textPaint.setStyle(Paint.Style.FILL);
//        textPaint.setTextSize(textSize);

        mPorterDuffXfermode = new PorterDuffXfermode(PorterDuff.Mode.SRC_IN);
//        nearOverTextWidth = textPaint.measureText(nearOverText);
//        overTextWidth = textPaint.measureText(overText);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        //获取View的宽高
        width = getMeasuredWidth();
        height = getMeasuredHeight();

        //圆角半径
        radius = height / 2.0f;
        //留出一定的间隙，避免边框被切掉一部分
        if (bgRectF == null) {
            bgRectF = new RectF(sideWidth, sideWidth, width - sideWidth, height - sideWidth);
        }

//        if (baseLineY == 0.0f) {
//            Paint.FontMetricsInt fm = textPaint.getFontMetricsInt();
//            baseLineY = height / 2 - (fm.descent / 2 + fm.ascent / 2);
//        }
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (!isNeedAnim) {
            progressCount = currentCount;
        }

        if (totalCount == 0) {
            scale = 0.0f;
        } else {
            scale = Float.parseFloat(new DecimalFormat("0.00").format((float) progressCount / (float) totalCount));
        }

        drawSide(canvas);
        drawBg(canvas);
        drawFg(canvas);
//        drawText(canvas);
    }

    //绘制背景边框
    private void drawSide(Canvas canvas) {
        canvas.drawRoundRect(bgRectF, radius, radius, sidePaint);
    }

    //绘制背景
    private void drawBg(Canvas canvas) {
        if (bgBitmap == null) {
            bgBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        }
        Canvas bgCanvas = new Canvas(bgBitmap);
        if (bgSrc == null) {
            bgSrc = BitmapFactory.decodeResource(getResources(), R.drawable.ic_spike);
        }
        bgCanvas.drawRoundRect(bgRectF, radius, radius, srcPaint);

        srcPaint.setXfermode(mPorterDuffXfermode);
        bgCanvas.drawBitmap(bgSrc, null, bgRectF, srcPaint);

        canvas.drawBitmap(bgBitmap, 0, 0, null);
        srcPaint.setXfermode(null);
    }

    //绘制进度条
    private void drawFg(Canvas canvas) {
        if (scale == 0.0f) {
            return;
        }
        Bitmap fgBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        Canvas fgCanvas = new Canvas(fgBitmap);
        if (fgSrc == null) {
            fgSrc = BitmapFactory.decodeResource(getResources(), R.drawable.ic_spike);
        }
        fgCanvas.drawRoundRect(
                new RectF(sideWidth, sideWidth, (width - sideWidth) * scale, height - sideWidth),
                radius, radius, srcPaint);

        srcPaint.setXfermode(mPorterDuffXfermode);
        fgCanvas.drawBitmap(fgSrc, null, bgRectF, srcPaint);

        canvas.drawBitmap(fgBitmap, 0, 0, null);
        srcPaint.setXfermode(null);
    }

    public void setTotalAndCurrentCount(int totalCount, int currentCount) {
        this.totalCount = totalCount;
        if (currentCount > totalCount) {
            currentCount = totalCount;
        }
        this.currentCount = currentCount;
        postInvalidate();//重新绘制
    }
}