bridge121

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;

    // ===== TUNING =====
    private static final int MAX_EDGES = 1000;
    private static final int MAX_ROWS = 6;
    private static final int MAX_STRING = 40;

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

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

        // ===== VERTICAL LAYOUT =====
        dot.append("rankdir=TB;\n");
        dot.append("nodesep=0.4;\n");
        dot.append("ranksep=1.2;\n");
        dot.append("node [shape=box, fontname=\"Arial\", fontsize=10];\n");
        dot.append("edge [dir=forward];\n\n");

        Set<String> processed = new HashSet<>();
        List<String> isolated = new ArrayList<>();

        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;

                boolean hasDeps = factory.getDependenciesForBean(name).length > 0;
                boolean hasDependents = factory.getDependentBeans(name).length > 0;

                if (!hasDeps && !hasDependents) {
                    isolated.add(name);
                }

                renderNode(dot, name, factory.getBeanDefinition(name));

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

            current = current.getParent();
        }

        // ===== FORCE VERTICAL STACK FOR DISCONNECTED =====
        for (int i = 0; i < isolated.size() - 1; i++) {
            dot.append("\"").append(isolated.get(i)).append("\" -> \"")
               .append(isolated.get(i + 1))
               .append("\" [style=invis];\n");
        }

        dot.append("}\n");

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

    // ===== NODE RENDERING =====
    private void renderNode(StringBuilder dot, String name, BeanDefinition def) {
        StringBuilder label = new StringBuilder();

        // Header (bean name)
        label.append(shorten(name));

        int rowCount = 0;

        // Properties
        for (PropertyValue pv : def.getPropertyValues().getPropertyValues()) {
            if (rowCount++ >= MAX_ROWS) {
                label.append("\\n...");
                break;
            }

            label.append("\\n")
                 .append(shorten(pv.getName()))
                 .append("=")
                 .append(shorten(extractValue(pv.getValue())));
        }

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

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

            if (rowCount++ >= MAX_ROWS) {
                label.append("\\n...");
                break;
            }

            label.append("\\narg[")
                 .append(e.getKey())
                 .append("]=")
                 .append(shorten(extractValue(e.getValue().getValue())));
        }

        dot.append("\"").append(name).append("\" ")
           .append("[label=\"")
           .append(escape(label.toString()))
           .append("\", style=filled, fillcolor=\"")
           .append(getColor(name))
           .append("\"];\n");
    }

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

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

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

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

        if (value instanceof Iterable) {
            List<String> out = new ArrayList<>();
            int i = 0;
            for (Object o : (Iterable<?>) value) {
                if (i++ > 3) { out.add("..."); break; }
                out.add(shorten(extractValue(o)));
            }
            return String.join(",", out);
        }

        return value.toString();
    }

    // ===== STRING SHORTENING =====
    private String shorten(String s) {
        if (s == null) return "";
        s = trim(s);
        if (s.length() > MAX_STRING) {
            return s.substring(0, MAX_STRING - 3) + "...";
        }
        return s;
    }

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

    // ===== ESCAPE FOR DOT =====
    private String escape(String s) {
        return s.replace("\"", "'")
                .replace("\n", "\\n");
    }

    // ===== FILE OUTPUT =====
    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"));
    }

    @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(); }
}