bridge120

package com.citi.get.cet.comet.tools;

import org.springframework.beans.PropertyValue;
import org.springframework.beans.factory.config.*;
import org.springframework.context.*;
import org.springframework.context.SmartLifecycle;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.*;

import static org.apache.commons.lang.StringUtils.trim;

public class SpringVisualizer implements ApplicationContextAware, SmartLifecycle {

    private ConfigurableApplicationContext startContext;
    private boolean isRunning = false;

    // ===== SAFETY SWITCHES =====
    private static final boolean LIGHT_MODE = true;   // 🔥 set false for full detail
    private static final int MAX_EDGES = 800;
    private static final int MAX_ROWS = 6;
    private static final int MAX_STRING = 20;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) {
        this.startContext = (ConfigurableApplicationContext) applicationContext;
    }

    @Override
    public void start() {
        StringBuilder dot = new StringBuilder("digraph G {\n");

        // ===== SAFE LAYOUT =====
        dot.append("    rankdir=TB;\n");
        dot.append("    nodesep=0.4;\n");
        dot.append("    ranksep=1.0;\n");
        dot.append("    node [fontname=\"Arial\", fontsize=10];\n");
        dot.append("    edge [dir=forward];\n\n");

        if (LIGHT_MODE) {
            dot.append("    node [shape=box];\n");
        } else {
            dot.append("    node [shape=plaintext];\n");
        }

        Set<String> processed = new HashSet<>();
        ApplicationContext current = this.startContext;

        int edgeCount = 0;

        while (current != null) {
            ConfigurableListableBeanFactory factory =
                    ((ConfigurableApplicationContext) current).getBeanFactory();

            for (String name : factory.getBeanDefinitionNames()) {
                if (!processed.add(name)) continue;

                if (LIGHT_MODE) {
                    renderSimpleNode(dot, name);
                } else {
                    renderFullNode(dot, name, factory.getBeanDefinition(name));
                }

                // ===== SAFE EDGE LIMIT =====
                for (String dep : factory.getDependenciesForBean(name)) {
                    if (edgeCount++ > MAX_EDGES) break;
                    dot.append("\"").append(name).append("\" -> \"")
                            .append(dep).append("\";\n");
                }
            }

            current = current.getParent();
        }

        dot.append("}\n");

        writeToFile(dot.toString());
        this.isRunning = true;
    }

    // ===== SIMPLE MODE (FAST + SAFE) =====
    private void renderSimpleNode(StringBuilder dot, String name) {
        String color = getColor(name);
        dot.append("\"").append(name).append("\" ")
                .append("[style=filled, fillcolor=\"").append(color).append("\"];\n");
    }

    // ===== FULL MODE (HTML TABLE, LIMITED) =====
    private void renderFullNode(StringBuilder dot, String name, BeanDefinition def) {
        String color = getColor(name);

        dot.append("\"").append(name).append("\" [label=<");
        dot.append("<TABLE BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\" CELLPADDING=\"4\" BGCOLOR=\"")
                .append(color).append("\">");

        // header
        dot.append("<TR><TD COLSPAN=\"2\" BGCOLOR=\"#DDDDDD\"><B>")
                .append(xmlEscape(name))
                .append("</B></TD></TR>");

        int rowCount = 0;

        // properties
        for (PropertyValue pv : def.getPropertyValues().getPropertyValues()) {
            if (rowCount++ > MAX_ROWS) {
                addEllipsis(dot);
                break;
            }

            dot.append("<TR>");
            dot.append("<TD>").append(xmlEscape(pv.getName())).append("</TD>");
            dot.append("<TD>").append(extractValue(pv.getValue())).append("</TD>");
            dot.append("</TR>");
        }

        // constructor args
        ConstructorArgumentValues cav = def.getConstructorArgumentValues();

        for (Map.Entry<Integer, ConstructorArgumentValues.ValueHolder> e :
                cav.getIndexedArgumentValues().entrySet()) {

            if (rowCount++ > MAX_ROWS) {
                addEllipsis(dot);
                break;
            }

            dot.append("<TR>");
            dot.append("<TD><I>arg[").append(e.getKey()).append("]</I></TD>");
            dot.append("<TD>").append(extractValue(e.getValue().getValue())).append("</TD>");
            dot.append("</TR>");
        }

        dot.append("</TABLE>>];\n");
    }

    private void addEllipsis(StringBuilder dot) {
        dot.append("<TR><TD COLSPAN=\"2\">...</TD></TR>");
    }

    private String extractValue(Object value) {
        if (value == null) return "null";

        if (value instanceof TypedStringValue) {
            return shorten(((TypedStringValue) value).getValue());
        }

        if (value instanceof BeanReference) {
            return "@" + ((BeanReference) value).getBeanName();
        }

        if (value instanceof BeanDefinition) {
            String cls = ((BeanDefinition) value).getBeanClassName();
            return cls != null
                    ? "<i>" + cls.substring(cls.lastIndexOf('.') + 1) + "</i>"
                    : "<i>InnerBean</i>";
        }

        if (value instanceof Iterable) {
            List<String> out = new ArrayList<>();
            int i = 0;
            for (Object o : (Iterable<?>) value) {
                if (i++ > 5) { out.add("..."); break; }
                out.add(extractValue(o));
            }
            return String.join("<BR/>", out);
        }

        return shorten(value.toString());
    }

    private String shorten(String s) {
        if (s == null) return "";
        s = trim(s);
        if (s.length() > MAX_STRING) {
            return xmlEscape(s.substring(0, MAX_STRING) + "...");
        }
        return xmlEscape(s);
    }

    private String getColor(String name) {
        String lower = name.toLowerCase();
        if (lower.contains("comet")) return "#FFF904";
        if (lower.contains("citi")) return "#CBE6C7";
        return "#E1F5FE";
    }

    private void writeToFile(String content) {
        try {
            File root = findProjectRoot();
            File buildDir = new File(root, "build");
            buildDir.mkdirs();

            File file = new File(buildDir, "spring-beans.dot");
            try (FileWriter writer = new FileWriter(file)) {
                writer.write(content);
            }

            System.out.println("\n==== GRAPH GENERATED ====");
            System.out.println(file.toURI());
            System.out.println("========================\n");

        } catch (IOException e) {
            System.err.println("Failed to write DOT file: " + e.getMessage());
        }
    }

    private File findProjectRoot() {
        File current = new File(System.getProperty("user.dir"));
        while (current != null) {
            if (new File(current, "build.gradle").exists() ||
                new File(current, "settings.gradle").exists()) {
                return current;
            }
            current = current.getParentFile();
        }
        return new File(System.getProperty("user.dir"));
    }

    private String xmlEscape(String input) {
        if (input == null) return "";
        return input.replace("&", "&amp;")
                .replace("<", "&lt;")
                .replace(">", "&gt;");
    }

    @Override public int getPhase() { return Integer.MAX_VALUE; }
    @Override public boolean isAutoStartup() { return true; }
    @Override public void stop() { isRunning = false; }
    @Override public boolean isRunning() { return isRunning; }
    @Override public void stop(Runnable callback) { stop(); callback.run(); }
}