package com.skiwi.tessutils4j.data;

import com.skiwi.tessutils4j.Objects;
import java.io.InvalidObjectException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author Frank van Heeswijk
 */
public class Symbol implements Serializable {
    private static final long serialVersionUID = 23829245030202L;

    private final String symbol;
    private final float confidence;
    private final boolean isDropcap;
    private final boolean isSubscript;
    private final boolean isSuperscript;
    private final List<SymbolChoice> symbolChoices;

    private Symbol(final String symbol, final float confidence, final boolean isDropcap, final boolean isSubscript, final boolean isSuperscript, final List<SymbolChoice> symbolChoices) {
        this.symbol = Objects.requireNonNull(symbol, "symbol");
        this.confidence = confidence;
        this.isDropcap = isDropcap;
        this.isSubscript = isSubscript;
        this.isSuperscript = isSuperscript;
        this.symbolChoices = Objects.requireNonNull(symbolChoices, "symbolChoices");
    }

    public String getSymbol() {
        return symbol;
    }

    public float getConfidence() {
        return confidence;
    }

    public boolean isDropcap() {
        return isDropcap;
    }

    public boolean isSubscript() {
        return isSubscript;
    }

    public boolean isSuperscript() {
        return isSuperscript;
    }

    public List<SymbolChoice> getSymbolChoices() {
        return symbolChoices;
    }

    public static class SymbolBuilder {
        private final String symbol;
        private final float confidence;
        private final boolean isDropcap;
        private final boolean isSubscript;
        private final boolean isSuperscript;
        private final List<SymbolChoice> symbolChoices = new ArrayList<SymbolChoice>();

        private SymbolBuilder(final String symbol, final float confidence, final boolean isDropcap, final boolean isSubscript, final boolean isSuperscript) {
            this.symbol = Objects.requireNonNull(symbol, "symbol");
            this.confidence = confidence;
            this.isDropcap = isDropcap;
            this.isSubscript = isSubscript;
            this.isSuperscript = isSuperscript;
        }

        public SymbolBuilder addSymbolChoice(final SymbolChoice symbolChoice) {
            symbolChoices.add(Objects.requireNonNull(symbolChoice, "symbolChoice"));
            return this;
        }

        public Symbol build() {
            return new Symbol(symbol, confidence, isDropcap, isSubscript, isSuperscript, symbolChoices);
        }
    }

    private Object writeReplace() {
        return new SerializationProxy(this);
    }

    private void readObject(final ObjectInputStream stream) throws InvalidObjectException {
        throw new InvalidObjectException("Proxy required");
    }

    private static class SerializationProxy implements Serializable {
        private static final long serialVersionUID = 49545459839839843L;

        private final String symbol;
        private final float confidence;
        private final boolean isDropcap;
        private final boolean isSubscript;
        private final boolean isSuperscript;
        private final List<SymbolChoice> symbolChoices;

        private SerializationProxy(final Symbol symbol) {
            this.symbol = symbol.symbol;
            this.confidence = symbol.confidence;
            this.isDropcap = symbol.isDropcap;
            this.isSubscript = symbol.isSubscript;
            this.isSuperscript = symbol.isSuperscript;
            this.symbolChoices = symbol.symbolChoices;
        }

        private Object readResolve() {
            return new Symbol(symbol, confidence, isDropcap, isSubscript, isSuperscript, symbolChoices);
        }
    }
}