package com.hjx.parent.utils;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.Base64;
import android.view.View;
import android.view.ViewTreeObserver;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import com.hjx.parent.function.Function1;

import java.io.ByteArrayOutputStream;

public class CutUtil {

    public static float[] measureBitmap(View view, Bitmap bitmap) {
        float realW;
        float realH;
        float offsetX;
        float offsetY;

        float vp = 1f * view.getWidth() / view.getHeight();
        float bp = 1f * bitmap.getWidth() / bitmap.getHeight();

        if (vp > bp) {
            realW = view.getHeight() * bp;
            realH = (float) view.getHeight();
            offsetY = 0f;
            offsetX = (view.getWidth() - realW) * 0.5f;
        } else if (vp < bp) {
            realW = (float) view.getWidth();
            realH = view.getWidth() * (1f / bp);
            offsetX = 0f;
            offsetY = (view.getHeight() - realH) * 0.5f;
        } else {
            realW = (float) view.getWidth();
            realH = (float) view.getHeight();
            offsetX = 0f;
            offsetY = 0f;
        }

        return new float[]{realW, realH, offsetX, offsetY};
    }

    public static Bitmap cut(Bitmap source, float x, float y, int w, int h, Context context) {
        // 获取 Glide 的 BitmapPool
        BitmapPool bitmapPool = Glide.get(context).getBitmapPool();

        // 从 BitmapPool 中获取可复用的 Bitmap
        Bitmap result = bitmapPool.get(w, h, source.getConfig() != null ? source.getConfig() : Bitmap.Config.ARGB_8888);

        // 填充白色背景
        result.eraseColor(Color.WHITE);

        // 创建画布并绘制
        Canvas canvas = new Canvas(result);
        Paint paint = new Paint();
        canvas.drawBitmap(source, -x, -y, paint);

        return result;
    }

    public static void onLayoutReady(final View view, final Function1<View> action) {
        view.getViewTreeObserver().addOnGlobalLayoutListener(
                new ViewTreeObserver.OnGlobalLayoutListener() {
                    @Override
                    public void onGlobalLayout() {
                        view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                        action.invoke(view);
                    }
                }
        );
    }

    public static byte[] bitmapToByteArray(Bitmap bitmap) {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, output);
        return output.toByteArray();
    }

    public static String bitmapToBase64(Bitmap bitmap, Boolean usePrefix) {
        String base64 = Base64.encodeToString(bitmapToByteArray(bitmap), Base64.NO_WRAP);
        if (usePrefix) return "data:image/jpeg;base64," + base64;
        else return base64;
    }
}