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package org.pitest.rv;


import org.pitest.reloc.asm.MethodVisitor;
import org.pitest.mutationtest.engine.gregor.MethodInfo;
import org.pitest.mutationtest.engine.gregor.MethodMutatorFactory;
import org.pitest.mutationtest.engine.gregor.MutationContext;

/**
 * Mutator that replaces an inline constant with 1;
 */
public enum CRCR1Mutator implements MethodMutatorFactory {

    CRCR1;

    private final class CRCRVisitor1 extends AbstractCRCRVisitor {

        CRCRVisitor1(final MutationContext context,
                     final MethodVisitor delegateVisitor) {
            super(context, delegateVisitor, CRCR1Mutator.this);
        }

        void mutate(final Double constant) {
            final Double replacement = 1D;

            if (constant != 1D && shouldMutate(constant, replacement)) {
                translateToByteCode(replacement);
            } else {
                translateToByteCode(constant);
            }
        }

        void mutate(final Float constant) {
            final Float replacement = 1F;

            if (constant != 1F && shouldMutate(constant, replacement)) {
                translateToByteCode(replacement);
            } else {
                translateToByteCode(constant);
            }
        }

        void mutate(final Integer constant) {
            final Integer replacement = 1;

            if (constant != 1 && shouldMutate(constant, replacement)) {
                translateToByteCode(replacement);
            } else {
                translateToByteCode(constant);
            }
        }

        void mutate(final Long constant) {

            final Long replacement = 1L;

            if (constant != 1L && shouldMutate(constant, replacement)) {
                translateToByteCode(replacement);
            } else {
                translateToByteCode(constant);
            }

        }
    }

    public MethodVisitor create(final MutationContext context,
                                final MethodInfo methodInfo, final MethodVisitor methodVisitor) {
        return new CRCRVisitor1(context, methodVisitor);
    }

    public String getGloballyUniqueId() {
        return this.getClass().getName();
    }

    public String getName() {
        return name();
    }

}