// 
// Decompiled by Procyon v0.6.0
// 

package com.google.crypto.tink.jwt;

import java.security.GeneralSecurityException;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.util.Optional;
import com.google.errorprone.annotations.Immutable;
import java.util.Objects;

public class JwtHmacParameters extends JwtMacParameters
{
    private final int keySizeBytes;
    private final KidStrategy kidStrategy;
    private final Algorithm algorithm;
    
    public static Builder builder() {
        return new Builder();
    }
    
    private JwtHmacParameters(final int keySizeBytes, final KidStrategy kidStrategy, final Algorithm algorithm) {
        this.keySizeBytes = keySizeBytes;
        this.kidStrategy = kidStrategy;
        this.algorithm = algorithm;
    }
    
    public int getKeySizeBytes() {
        return this.keySizeBytes;
    }
    
    public KidStrategy getKidStrategy() {
        return this.kidStrategy;
    }
    
    public Algorithm getAlgorithm() {
        return this.algorithm;
    }
    
    @Override
    public boolean hasIdRequirement() {
        return this.kidStrategy.equals(KidStrategy.BASE64_ENCODED_KEY_ID);
    }
    
    @Override
    public boolean allowKidAbsent() {
        return this.kidStrategy.equals(KidStrategy.CUSTOM) || this.kidStrategy.equals(KidStrategy.IGNORED);
    }
    
    @Override
    public boolean equals(final Object o) {
        if (!(o instanceof JwtHmacParameters)) {
            return false;
        }
        final JwtHmacParameters that = (JwtHmacParameters)o;
        return that.keySizeBytes == this.keySizeBytes && that.kidStrategy.equals(this.kidStrategy) && that.algorithm.equals(this.algorithm);
    }
    
    @Override
    public int hashCode() {
        return Objects.hash(JwtHmacParameters.class, this.keySizeBytes, this.kidStrategy, this.algorithm);
    }
    
    @Override
    public String toString() {
        return "JWT HMAC Parameters (kidStrategy: " + this.kidStrategy + ", Algorithm " + this.algorithm + ", and " + this.keySizeBytes + "-byte key)";
    }
    
    @Immutable
    public static final class KidStrategy
    {
        public static final KidStrategy BASE64_ENCODED_KEY_ID;
        public static final KidStrategy IGNORED;
        public static final KidStrategy CUSTOM;
        private final String name;
        
        private KidStrategy(final String name) {
            this.name = name;
        }
        
        @Override
        public String toString() {
            return this.name;
        }
        
        static {
            BASE64_ENCODED_KEY_ID = new KidStrategy("BASE64_ENCODED_KEY_ID");
            IGNORED = new KidStrategy("IGNORED");
            CUSTOM = new KidStrategy("CUSTOM");
        }
    }
    
    @Immutable
    public static final class Algorithm
    {
        public static final Algorithm HS256;
        public static final Algorithm HS384;
        public static final Algorithm HS512;
        private final String name;
        
        private Algorithm(final String name) {
            this.name = name;
        }
        
        @Override
        public String toString() {
            return this.name;
        }
        
        public String getStandardName() {
            return this.name;
        }
        
        static {
            HS256 = new Algorithm("HS256");
            HS384 = new Algorithm("HS384");
            HS512 = new Algorithm("HS512");
        }
    }
    
    public static final class Builder
    {
        Optional<Integer> keySizeBytes;
        Optional<KidStrategy> kidStrategy;
        Optional<Algorithm> algorithm;
        
        @CanIgnoreReturnValue
        public Builder setKeySizeBytes(final int keySizeBytes) {
            this.keySizeBytes = Optional.of(keySizeBytes);
            return this;
        }
        
        @CanIgnoreReturnValue
        public Builder setKidStrategy(final KidStrategy kidStrategy) {
            this.kidStrategy = Optional.of(kidStrategy);
            return this;
        }
        
        @CanIgnoreReturnValue
        public Builder setAlgorithm(final Algorithm algorithm) {
            this.algorithm = Optional.of(algorithm);
            return this;
        }
        
        public JwtHmacParameters build() throws GeneralSecurityException {
            if (!this.keySizeBytes.isPresent()) {
                throw new GeneralSecurityException("Key Size must be set");
            }
            if (!this.algorithm.isPresent()) {
                throw new GeneralSecurityException("Algorithm must be set");
            }
            if (!this.kidStrategy.isPresent()) {
                throw new GeneralSecurityException("KidStrategy must be set");
            }
            if (this.keySizeBytes.get() < 16) {
                throw new GeneralSecurityException("Key size must be at least 16 bytes");
            }
            return new JwtHmacParameters(this.keySizeBytes.get(), this.kidStrategy.get(), this.algorithm.get(), null);
        }
        
        private Builder() {
            this.keySizeBytes = Optional.empty();
            this.kidStrategy = Optional.empty();
            this.algorithm = Optional.empty();
        }
    }
}