package com.mes.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;

public class ConfigLoader {
    private static final String CONFIG_PATH = "config/config.properties";

    public static InputStream openConfigStream() throws IOException {
        ClassLoader cl = ConfigLoader.class.getClassLoader();
        InputStream is = cl != null ? cl.getResourceAsStream(CONFIG_PATH) : null;
        if (is == null) {
            is = ConfigLoader.class.getResourceAsStream("/" + CONFIG_PATH);
        }
        if (is == null) {
            File[] candidates = new File[]{
                    new File("src/resources/" + CONFIG_PATH),
                    new File(CONFIG_PATH),
                    new File("bin/" + CONFIG_PATH)
            };
            for (File file : candidates) {
                if (file.isFile()) {
                    return new FileInputStream(file);
                }
            }
        }
        if (is == null) {
            throw new IOException("找不到配置文件: " + CONFIG_PATH);
        }
        return is;
    }

    public static Properties loadProperties() throws IOException {
        Properties pro = new Properties();
        try (InputStream is = openConfigStream();
             BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"))) {
            pro.load(br);
        }
        return pro;
    }
}