package decorator;
public class Main {
    public static void main(String[] args) {
        System.out.println("=== Decorator Design Pattern Demo ===\n");

        String input = "  hello world, badword is here  ";
        System.out.println("Input: \"" + input + "\"\n");

        // Stack 1: just trim
        TextProcessor trimOnly = new TrimDecorator(new PlainTextProcessor());
        System.out.println("Trim only:               \"" + trimOnly.process(input) + "\"");

        // Stack 2: trim first (innermost), then uppercase (outermost)
        // Execution order: PlainText → Trim → UpperCase
        TextProcessor trimThenUpper =
            new UpperCaseDecorator(
                new TrimDecorator(
                    new PlainTextProcessor()));
        System.out.println("Trim + UpperCase:        \"" + trimThenUpper.process(input) + "\"");

        // Stack 3: trim, filter profanity, then uppercase
        TextProcessor full =
            new UpperCaseDecorator(
                new ProfanityFilterDecorator(
                    new TrimDecorator(
                        new PlainTextProcessor())));
        System.out.println("Trim + Filter + Upper:   \"" + full.process(input) + "\"");

        // Stack 4: filter THEN trim — different result because order changed
        TextProcessor filterFirst =
            new TrimDecorator(
                new ProfanityFilterDecorator(
                    new PlainTextProcessor()));
        System.out.println("Filter + Trim:           \"" + filterFirst.process(input) + "\"");

        System.out.println("\n--- JDK equivalent ---");
        System.out.println("new BufferedReader(new InputStreamReader(socket.getInputStream()))");
        System.out.println("Same pattern: each wrapper adds one behaviour, order matters.");

        System.out.println("\n=== Demo complete ===");
    }
}