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/*
 * Copyright (C) 2012-2016 DuyHai DOAN
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package info.archinnov.achilles.validation;

import static java.lang.String.format;

import java.util.Collection;
import java.util.Map;
import java.util.regex.Pattern;

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.MapUtils;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;

import info.archinnov.achilles.exception.AchillesBeanMappingException;
import info.archinnov.achilles.exception.AchillesException;
import info.archinnov.achilles.exception.AchillesInvalidTableException;

public class Validator {
    public static void validateNotBlank(String arg, String message, Object... args) {
        if (StringUtils.isBlank(arg)) {
            throw new AchillesException(format(message, args));
        }
    }

    public static void validateNotNull(Object arg, String message, Object... args) {
        if (arg == null) {
            throw new AchillesException(format(message, args));
        }
    }

    public static void validateBeanMappingNotNull(Object arg, String message, Object... args) {
        if (arg == null) {
            throw new AchillesBeanMappingException(format(message, args));
        }
    }

    public static void validateNotEmpty(Object[] arg, String message, Object... args) {
        if (ArrayUtils.isEmpty(arg)) {
            throw new AchillesException(format(message, args));
        }
    }

    public static void validateNotEmpty(Collection arg, String message, Object... args) {
        if (CollectionUtils.isEmpty(arg)) {
            throw new AchillesException(format(message, args));
        }
    }

    public static void validateNotEmpty(Map arg, String message, Object... args) {
        if (MapUtils.isEmpty(arg)) {
            throw new AchillesException(format(message, args));
        }
    }


    public static void validateEmpty(Collection arg, String message, Object... args) {
        if (CollectionUtils.isNotEmpty(arg)) {
            throw new AchillesException(format(message, args));
        }
    }

    public static void validateSize(Map arg, int size, String message, Object... args) {
        validateNotEmpty(arg, "The map '%s' should not be empty", args);
        if (arg.size() != size) {
            throw new AchillesException(format(message, args));
        }
    }

    public static void validateComparable(Class type, String message, Object... args) {
        if (!Comparable.class.isAssignableFrom(type)) {
            throw new AchillesException(format(message, args));
        }
    }

    public static void validateRegExp(String arg, String regexp, String label) {
        validateNotBlank(arg, "The text value '%s' should not be blank", label);
        if (!Pattern.matches(regexp, arg)) {
            throw new AchillesException(format("The property '%s' should match the pattern '%s'", label, regexp));
        }
    }

    public static void validateInstantiable(Class arg) {
        validateNotNull(arg, "The class should not be null");
        String canonicalName = arg.getCanonicalName();

        try {
            arg.newInstance();
        } catch (InstantiationException | IllegalAccessException e) {
            throw new AchillesBeanMappingException(
                    format("Cannot instantiate the class '%s'. Please ensure the class is not an abstract class, an interface, an array class, a primitive type, or void and have a nullary (default) constructor and is declared public",
                            canonicalName));
        }
    }

    public static  void validateInstanceOf(Object entity, Class targetClass, String message, Object... args) {
        validateNotNull(entity, "Entity '%s' should not be null", entity);
        if (!targetClass.isInstance(entity)) {
            throw new AchillesException(format(message, args));
        }
    }

    public static void validateTrue(boolean condition, String message, Object... args) {
        if (!condition) {
            throw new AchillesException(format(message, args));
        }
    }

    public static void validateBeanMappingTrue(boolean condition, String message, Object... args) {
        if (!condition) {
            throw new AchillesBeanMappingException(format(message, args));
        }
    }

    public static void validateTableTrue(boolean condition, String message, Object... args) {
        if (!condition) {
            throw new AchillesInvalidTableException(format(message, args));
        }
    }

    public static void validateFalse(boolean condition, String message, Object... args) {
        if (condition) {
            throw new AchillesException(format(message, args));
        }
    }

    public static void validateBeanMappingFalse(boolean condition, String message, Object... args) {
        if (condition) {
            throw new AchillesBeanMappingException(format(message, args));
        }
    }

    public static void validateTableFalse(boolean condition, String message, Object... args) {
        if (condition) {
            throw new AchillesInvalidTableException(format(message, args));
        }
    }
}