package com.fr.startup.ui;

import com.fr.concurrent.FineExecutors;
import com.fr.concurrent.NamedThreadFactory;
import com.fr.design.gui.iprogressbar.ProgressDialog;
import com.fr.design.i18n.Toolkit;
import com.fr.design.ui.util.UIUtil;
import com.fr.event.Event;
import com.fr.event.EventDispatcher;
import com.fr.event.Listener;
import com.fr.module.ModuleEvent;

import java.awt.Frame;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

/**
 * 启动加载面板
 *
 * @author Harrison
 * @version 11.0
 * created by Harrison on 2022/11/08
 **/
public class StartupLoadingPanel {
    
    /**
     * 每次更新的步伐
     */
    private static final int STEP = 1;
    
    /**
     * 40ms更新进度
     */
    private static final int STEP_HEARTBEAT = 40;
    
    private final Listener<String> MODULE_LISTENER = new Listener<String>() {
        @Override
        public void on(Event event, String param) {
            moduleId = param;
        }
    };
    
    private ProgressDialog progressDialog;
    private String moduleId;
    private int progress;
    
    public StartupLoadingPanel(Frame frame) {
        this.progressDialog = new ProgressDialog(frame);
        this.moduleId = Toolkit.i18nText("Fine-Design_Basic_Initializing");
    
        initListeners();
    }
    
    /**
     * 隐藏
     */
    public void hide() {
        this.progress = progressDialog.getProgressMaximum();
    }
    
    /**
     * 展示
     */
    public void show() {
        
        final ScheduledExecutorService scheduler = FineExecutors.newScheduledThreadPool(1,
                new NamedThreadFactory("StartupLoadingPanel"));
        scheduler.scheduleAtFixedRate(new Runnable() {
            @Override
            public void run() {
                UIUtil.invokeAndWaitIfNeeded(() -> {
                    if (isComplete()) {
                        scheduler.shutdown();
                        progressDialog.dispose();
                        resetListeners();
                        return;
                    }
                    if (!progressDialog.isVisible()) {
                        progressDialog.setVisible(true);
                        String moduleId = getModuleId();
                        progressDialog.updateLoadingText(moduleId);
                    }
                    progressDialog.setProgressValue(incrementProgress());
                });
            }
        }, 0, STEP_HEARTBEAT, TimeUnit.MILLISECONDS);
        
    }
    
    private void initListeners() {
        
        EventDispatcher.listen(ModuleEvent.MajorModuleStarting, MODULE_LISTENER);
    }
    
    private void resetListeners() {
    
        EventDispatcher.stopListen(MODULE_LISTENER);
    }
    
    private boolean isComplete() {
        return this.progress >= progressDialog.getProgressMaximum();
    }
    
    private String getModuleId() {
        
        return this.moduleId;
    }
    
    private int incrementProgress() {
    
        if (progress != progressDialog.getProgressMaximum()) {
            progress += STEP;
        }
        return progress;
    }
    
    
}