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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.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.function.Function;
import java.util.function.ToLongFunction;

import functionalj.lens.lenses.java.time.InstantAccess;
import functionalj.lens.lenses.java.time.LocalDateTimeAccess;
import functionalj.tuple.Tuple;
import functionalj.tuple.Tuple2;
import lombok.val;
import nullablej.nullable.Nullable;

@SuppressWarnings("javadoc")
@FunctionalInterface
public interface LongAccess 
        extends 
            NumberAccess>, 
            ToLongFunction,
            ConcreteAccess> {
    
    @Override
    public default LongAccess newAccess(Function accessToValue) {
        return accessToValue::apply;
    }
    
    public default long applyAsLong(HOST host) {
        return apply(host).longValue();
    }
    
    public default InstantAccess toInstant() {
        return host -> {
            long timestampMilliSecond = apply(host);
            return Instant.ofEpochMilli(timestampMilliSecond);
        };
    }
    
    public default LocalDateTimeAccess toLocalDateTime() {
        return toLocalDateTime(ZoneId.systemDefault());
    }
    
    public default LocalDateTimeAccess toLocalDateTime(ZoneId zone) {
        return host -> {
            val timestampMilliSecond = apply(host);
            val instant = Instant.ofEpochMilli(timestampMilliSecond);
            return LocalDateTime.ofInstant(instant, zone);
        };
    }
    
    public default MathOperators __mathOperators() {
        return __LongMathOperators;
    }
    
    public static MathOperators __LongMathOperators = new MathOperators() {
        
        @Override
        public Long zero() {
            return 0L;
        }
        @Override
        public Long one() {
            return 1L;
        }
        @Override
        public Long minusOne() {
            return -1L;
        }
        @Override
        public Integer toInteger(Long number) {
            return toLong(number).intValue();
        }
        @Override
        public Long toLong(Long number) {
            return Nullable.of(number).orElse(0L);
        }
        @Override
        public Double toDouble(Long number) {
            return (double)toLong(number);
        }
        @Override
        public BigInteger toBigInteger(Long number) {
            return BigInteger.valueOf(toLong(number));
        }
        @Override
        public BigDecimal toBigDecimal(Long number) {
            return new BigDecimal(toLong(number));
        }
        
        @Override
        public Long add(Long number1, Long number2) {
            long v1 = (number1 == null) ? 0 : number1.longValue();
            long v2 = (number2 == null) ? 0 : number2.longValue();
            return v1 + v2;
        }
        @Override
        public Long subtract(Long number1, Long number2) {
            long v1 = (number1 == null) ? 0 : number1.longValue();
            long v2 = (number2 == null) ? 0 : number2.longValue();
            return v1 - v2;
        }
        @Override
        public Long multiply(Long number1, Long number2) {
            long v1 = (number1 == null) ? 0 : number1.longValue();
            long v2 = (number2 == null) ? 0 : number2.longValue();
            return v1 * v2;
        }
        @Override
        public Long divide(Long number1, Long number2) {
            long v1 = (number1 == null) ? 0 : number1.longValue();
            long v2 = (number2 == null) ? 0 : number2.longValue();
            return v1 / v2;
        }
        @Override
        public Long remainder(Long number1, Long number2) {
            long v1 = (number1 == null) ? 0 : number1.longValue();
            long v2 = (number2 == null) ? 0 : number2.longValue();
            return v1 % v2;
        }
        
        @Override
        public Tuple2 divideAndRemainder(Long number1, Long number2) {
            long v1 = (number1 == null) ? 0 : number1.longValue();
            long v2 = (number2 == null) ? 0 : number2.longValue();
            return Tuple.of(v1 / v2, v1 % v2);
        }
        
        @Override
        public Long pow(Long number1, Long number2) {
            long v1 = (number1 == null) ? 0 : number1.longValue();
            long v2 = (number2 == null) ? 0 : number2.longValue();
            return (long)Math.pow(v1, v2);
        }
        
        @Override
        public Long abs(Long number) {
            long v = (number == null) ? 0 : number.longValue();
            return Math.abs(v);
        }
        @Override
        public Long negate(Long number) {
            long v = (number == null) ? 0 : number.longValue();
            return -1 * v;
        }
        @Override
        public Long signum(Long number) {
            long v = (number == null) ? 0 : number.longValue();
            return (long)Math.signum(v);
        }
        
        @Override
        public Long min(Long number1, Long number2) {
            long v1 = (number1 == null) ? 0 : number1.longValue();
            long v2 = (number2 == null) ? 0 : number2.longValue();
            return Math.min(v1, v2);
        }
        @Override
        public Long max(Long number1, Long number2) {
            long v1 = (number1 == null) ? 0 : number1.longValue();
            long v2 = (number2 == null) ? 0 : number2.longValue();
            return Math.max(v1, v2);
        }
        
    };
}