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// ============================================================================
// Copyright (c) 2017-2019 Nawapunth Manusitthipol (NawaMan - http://nawaman.net).
// ----------------------------------------------------------------------------
// MIT License
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
// ============================================================================
package functionalj.lens.lenses;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.function.Function;
import java.util.function.ToIntFunction;

import functionalj.tuple.Tuple;
import functionalj.tuple.Tuple2;
import lombok.val;

@SuppressWarnings("javadoc")
@FunctionalInterface
public interface IntegerAccess 
                    extends 
                        NumberAccess>,
                        ToIntFunction,
                        ConcreteAccess> {
    
    // TODO - applyAsInt should be used first if the function from primitive ... find a way to do this.
    
    @Override
    public default IntegerAccess newAccess(Function accessToValue) {
        return accessToValue::apply;
    }
    
    public default int applyAsInt(HOST host) {
        return apply(host).intValue();
    }
    
    public default MathOperators __mathOperators() {
        return __IntMathOperators;
    }
    
    public default IntegerAccess bitAnd(int value) {
        return intAccess(0, i -> i & value);
    }
    public default IntegerAccess bitOr(int value) {
        return intAccess(0, i -> i | value);
    }
    public default BooleanAccess bitAt(int bitIndex) {
        val p = (int)Math.pow(2, bitIndex);
        return booleanAccess(false, i -> (i & p) != 0);
    }
    
    public static MathOperators __IntMathOperators = new MathOperators() {
        
        @Override
        public Integer zero() {
            return 0;
        }
        @Override
        public Integer one() {
            return 1;
        }
        @Override
        public Integer minusOne() {
            return -1;
        }
        @Override
        public Integer toInteger(Integer number) {
            return (number == null) ? 0 : number.intValue();
        }
        @Override
        public Long toLong(Integer number) {
            return (long)toInteger(number);
        }
        @Override
        public Double toDouble(Integer number) {
            return (double)toInteger(number);
        }
        @Override
        public BigInteger toBigInteger(Integer number) {
            return BigInteger.valueOf(toInteger(number));
        }
        @Override
        public BigDecimal toBigDecimal(Integer number) {
            return new BigDecimal(toInteger(number));
        }
        
        @Override
        public Integer add(Integer number1, Integer number2) {
            int v1 = (number1 == null) ? 0 : number1.intValue();
            int v2 = (number2 == null) ? 0 : number2.intValue();
            return v1 + v2;
        }
        @Override
        public Integer subtract(Integer number1, Integer number2) {
            int v1 = (number1 == null) ? 0 : number1.intValue();
            int v2 = (number2 == null) ? 0 : number2.intValue();
            return v1 - v2;
        }
        @Override
        public Integer multiply(Integer number1, Integer number2) {
            int v1 = (number1 == null) ? 0 : number1.intValue();
            int v2 = (number2 == null) ? 0 : number2.intValue();
            return v1 * v2;
        }
        @Override
        public Integer divide(Integer number1, Integer number2) {
            int v1 = (number1 == null) ? 0 : number1.intValue();
            int v2 = (number2 == null) ? 0 : number2.intValue();
            return v1 / v2;
        }
        @Override
        public Integer remainder(Integer number1, Integer number2) {
            int v1 = (number1 == null) ? 0 : number1.intValue();
            int v2 = (number2 == null) ? 0 : number2.intValue();
            return v1 % v2;
        }
        
        @Override
        public Tuple2 divideAndRemainder(Integer number1, Integer number2) {
            int v1 = (number1 == null) ? 0 : number1.intValue();
            int v2 = (number2 == null) ? 0 : number2.intValue();
            return Tuple.of(v1 / v2, v1 % v2);
        }
        
        @Override
        public Integer pow(Integer number1, Integer number2) {
            int v1 = (number1 == null) ? 0 : number1.intValue();
            int v2 = (number2 == null) ? 0 : number2.intValue();
            return (int)Math.pow(v1, v2);
        }
        
        @Override
        public Integer abs(Integer number) {
            int v = (number == null) ? 0 : number.intValue();
            return Math.abs(v);
        }
        @Override
        public Integer negate(Integer number) {
            int v = (number == null) ? 0 : number.intValue();
            return Math.negateExact(v);
        }
        @Override
        public Integer signum(Integer number) {
            int v = (number == null) ? 0 : number.intValue();
            return (int)Math.signum(v);
        }
        
        @Override
        public Integer min(Integer number1, Integer number2) {
            int v1 = (number1 == null) ? 0 : number1.intValue();
            int v2 = (number2 == null) ? 0 : number2.intValue();
            return Math.min(v1, v2);
        }
        @Override
        public Integer max(Integer number1, Integer number2) {
            int v1 = (number1 == null) ? 0 : number1.intValue();
            int v2 = (number2 == null) ? 0 : number2.intValue();
            return Math.max(v1, v2);
        }
        
    };
    
}