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 * Copyright (C) 2026, Leo Galambos
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package zeroecho.sdk.builders.core;

import zeroecho.sdk.content.builtin.PlainString;

/**
 * Builder interface for constructing {@link PlainString} instances, which
 * represent unencrypted textual content.
 * <p>
 * This builder supports specifying a string value to be encapsulated and
 * optionally used in cryptographic processing pipelines, although the value
 * itself remains unencrypted.
 * <p>
 * The {@link #build(boolean)} method accepts an {@code encrypt} flag to comply
 * with the {@link DataContentBuilder} interface. However, this flag is ignored
 * because {@code PlainString} represents unencrypted data.
 * <p>
 * Usage example:
 * 
 * <pre>{@code
 * PlainString plainText = PlainStringBuilder.builder()
 *     .value("Hello, World!")
 *     .build(true); // encrypt flag is ignored for PlainString
 * }</pre>
 */
public interface PlainStringBuilder extends DataContentBuilder<PlainString> {

    /**
     * Creates a new instance of the default builder implementation.
     *
     * @return a new {@code PlainStringBuilder}
     */
    static PlainStringBuilder builder() {
        return new DefaultPlainStringBuilder();
    }

    /**
     * Sets the string value that the {@link PlainString} instance will contain.
     *
     * @param value the string value; may be {@code null} or empty depending on
     *              usage
     * @return this builder instance
     */
    PlainStringBuilder value(String value);

    /**
     * Default implementation of the {@link PlainStringBuilder} interface.
     * <p>
     * Builds a {@link PlainString} instance using the specified string value.
     */
    final class DefaultPlainStringBuilder implements PlainStringBuilder {
        private String valueField;

        private DefaultPlainStringBuilder() {
        }

        @Override
        public PlainStringBuilder value(final String value) {
            this.valueField = value;
            return this;
        }

        @Override
        public PlainString build(final boolean encrypt) {
            return new PlainString(valueField);
        }
    }
}
