package com.hxzkoa.util;

import java.awt.Font;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

import javax.swing.filechooser.FileSystemView;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.title.LegendTitle;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.DefaultKeyedValues;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;

import com.hxzkoa.json.tb_history_power;

/**
 * XY折线图
 * 
 */
public class LineXy {
	static JFreeChart chart = null;

	/**
	 * 生成JFreeChart
	 * 
	 * @throws IOException
	 */
	public static void getJFreeChart_hp(String name, List<tb_history_power> powerList,String sysPath) throws IOException {
		CategoryDataset dataset = null;
		DefaultKeyedValues keyedValues = new DefaultKeyedValues();
		int size = powerList.size();
		if (size != 0) {
			for (int i = 0; i < size; i++) {
				tb_history_power pow = powerList.get(i);
				int power = Integer.parseInt(pow.getPower());
				keyedValues.addValue(pow.getTime(), power);
			}
			dataset = DatasetUtilities.createCategoryDataset(name + "电量", keyedValues);
			chart = ChartFactory.createLineChart("", // 图表标题
					"日期", // x轴标签
					"电量(%)", // y轴标签
					dataset, // 数据集
					PlotOrientation.VERTICAL, // 图表方向：水平、垂直
					true, // 是否显示图例
					false, // 是否生成工具
					false // 是否生成URL链接
			);
			// 修改字体
			updateFont(chart);
		}
		chart.setTitle(new TextTitle(name + "电量分析", new Font("宋体", Font.BOLD + Font.ITALIC, 20)));
		LegendTitle legend = chart.getLegend(0);// 设置Legend
		legend.setItemFont(new Font("宋体", Font.BOLD, 14));
		//File desktopDir = FileSystemView.getFileSystemView().getHomeDirectory();
		//String path = desktopDir.getAbsolutePath()+ "\\" + name + "电量分析.jpeg";
//		String filePath = "C:/powerAnalysis/";
		String filePath = sysPath+"hxzk/image/powerAnalysis/";
		File dir = new File(filePath);
		if(!dir.isDirectory()){
			dir.mkdirs();
		}
		String fileName =  filePath + name + "电量分析.jpeg";
		OutputStream os = new FileOutputStream(fileName);// 图片是文件格式的，故要用到FileOutputStream用来输出。
		ChartUtilities.writeChartAsJPEG(os, chart, 1000, 800);
		// 使用一个面向application的工具类，将chart转换成JPEG格式的图片。第3个参数是宽度，第4个参数是高度。
		os.close();// 关闭输出流
	}

	/**
	 * 修改字体
	 * 
	 * @param chart
	 */
	private static void updateFont(JFreeChart chart) {

		// 标题
		TextTitle textTitle = chart.getTitle();
		textTitle.setFont(new Font("宋体", Font.PLAIN, 20));
		LegendTitle legendTitle = chart.getLegend();
		legendTitle.setItemFont(new Font("宋体", Font.PLAIN, 14));
		// 图表
		CategoryPlot categoryPlot = chart.getCategoryPlot();

		CategoryAxis categoryAxis = categoryPlot.getDomainAxis();
		// X轴字体
		categoryAxis.setTickLabelFont(new Font("宋体", Font.PLAIN, 14));
		// X轴标签字体
		categoryAxis.setLabelFont(new Font("宋体", Font.PLAIN, 14));

		ValueAxis valueAxis = categoryPlot.getRangeAxis();
		// y轴字体
		valueAxis.setTickLabelFont(new Font("宋体", Font.PLAIN, 14));
		// y轴标签字体
		valueAxis.setLabelFont(new Font("宋体", Font.PLAIN, 14));
	}

	public static void main(String[] args) throws Exception {
//		String tagid = "4004";
//		List<tb_history_power> powerList = new ArrayList();
//		tb_history_power p1 = new tb_history_power();
//		tb_history_power p2 = new tb_history_power();
//		p1.setPower("37");
//		p1.setTime("03-28");
//		p2.setPower("35");
//		p2.setTime("03-19");
//		powerList.add(p1);
//		powerList.add(p2);
////		getJFreeChart_hp(tagid, powerList,);
//		System.out.println("导出成功！");
	}

}