package mc.protocol.text;

import lombok.Getter;
import lombok.Setter;

import javax.annotation.Nullable;
import java.util.Optional;

@SuppressWarnings("OptionalUsedAsFieldOrParameterType")
@Getter
@Setter
public class TextStyle {
    public static final TextStyle BOLD = new TextStyle(true, null, null, null, null);
    public static final TextStyle ITALIC = new TextStyle(null, true, null, null, null);
    public static final TextStyle UNDERLINE = new TextStyle(null, null, true, null, null);
    public static final TextStyle STRIKETHOUGH = new TextStyle(null, null, null, true, null);
    public static final TextStyle OBFUSCATED = new TextStyle(null, null, null, null, true);
    public static final TextStyle RESET = new TextStyle(false, false, false, false, false);

    private static class OptionalBoolean {
        private static final Optional<Boolean> TRUE = Optional.of(true);
        private static final Optional<Boolean> FALSE = Optional.of(false);
        private static final Optional<Boolean> NONE = Optional.empty();

        static Optional<Boolean> of(boolean bool) {
            return bool ? TRUE : FALSE;
        }

        static Optional<Boolean> of(@Nullable Boolean bool) {
            if (bool != null) {
                return of(bool.booleanValue());
            }
            return NONE;
        }
    }

    private Optional<Boolean> bold;
    private Optional<Boolean> italic;
    private Optional<Boolean> underline;
    private Optional<Boolean> strikethrough;
    private Optional<Boolean> obfuscated;

    public TextStyle(@Nullable Boolean bold,
                     @Nullable Boolean italic,
                     @Nullable Boolean underline,
                     @Nullable Boolean strikethrough,
                     @Nullable Boolean obfuscated) {
        this.bold = OptionalBoolean.of(bold);
        this.italic = OptionalBoolean.of(italic);
        this.underline = OptionalBoolean.of(underline);
        this.strikethrough = OptionalBoolean.of(strikethrough);
        this.obfuscated = OptionalBoolean.of(obfuscated);
    }

    public void merge(TextStyle style) {
        if (style.bold.isPresent()) this.bold = style.bold;
        if (style.italic.isPresent()) this.italic = style.italic;
        if (style.underline.isPresent()) this.underline = style.underline;
        if (style.strikethrough.isPresent()) this.strikethrough = style.strikethrough;
        if (style.obfuscated.isPresent()) this.obfuscated = style.obfuscated;
    }

    public static TextStyle none() {
        return new TextStyle(null,null,null,null, null);
    }
}