package com.estate.expert.admin.stat.report.render;

import com.deepoove.poi.data.PictureRenderData;
import com.deepoove.poi.data.Pictures;
import com.deepoove.poi.policy.PictureRenderPolicy;
import com.estate.expert.admin.service.UserFileService;
import lombok.AllArgsConstructor;

/**
 * 自定义图片渲染策略
 */
@AllArgsConstructor
public class CustomPictureRenderPolicy extends PictureRenderPolicy {

    private UserFileService userFileService;

    /**
     * 渲染图片
     * @param source 源
     * @return 图片渲染数据
     * @throws Exception 异常
     */
    @Override
    public PictureRenderData cast(Object source) throws Exception {
        var id = (Integer)source;
        var file = userFileService.get(id);
        if(file == null){
            return null;
        }

        var resource =  userFileService.resolveResource(file);
        if(resource == null){
            return null;
        }

        // 设置图片尺寸：宽度8.8cm，高度6.8cm
        // Word中1cm ≈ 37.795像素（96 DPI），所以8.8cm ≈ 333像素，6.8cm ≈ 257像素
        var data = Pictures.ofStream(resource.getInputStream()).size(333, 257).create();
        return super.cast(data);
    }
}