/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * 
 *      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 org.drools.drl.parser.lang.dsl;

import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;

public abstract class AbstractDSLMappingEntry
    implements
    DSLMappingEntry {

    private Section              section;
    private MetaData             metadata;
    private String               key;
    private String               value;
    private Map<String, Integer> variables = new HashMap<>();
    private Pattern              keyPattern;
    private String               valuePattern;

    public AbstractDSLMappingEntry() {
        super();
    }

    /**
     * @inheritDoc
     */
    public Section getSection() {
        return this.section;
    }

    /**
     * @inheritDoc
     */
    public DSLMappingEntry.MetaData getMetaData() {
        return this.metadata;
    }

    /**
     * @inheritDoc
     */
    public String getMappingKey() {
        return this.key;
    }

    public void setMappingKey(final String key) {
        this.key = key;
    }

    public void setMappingValue(final String value) {
        this.value = value;
    }

    public void setKeyPattern(Pattern keyPattern) {
        this.keyPattern = keyPattern;
    }

    /**
     * @inheritDoc
     */
    public String getMappingValue() {
        return this.value;
    }

    /**
     * @param section the section to set
     */
    public void setSection(final Section section) {
        this.section = section;
    }

    /**
     * @param metadata the metadata to set
     */
    public void setMetaData(final MetaData metadata) {
        this.metadata = metadata;
    }

    /**
     * @return the keyPattern
     */
    public Pattern getKeyPattern() {
        return this.keyPattern;
    }

    /**
     * @return the valuePattern
     */
    public String getValuePattern() {
        return this.valuePattern;
    }

    public void setValuePattern(final String valuePattern) {
        this.valuePattern = valuePattern;
    }

    /**
     * @return the variables
     */
    public Map<String, Integer> getVariables() {
        return this.variables;
    }

    public void setVariables(final Map<String, Integer> variables) {
        this.variables = variables;
    }

    public String toPatternString() {
        return this.section.getSymbol() + "[" + this.metadata + "]" + this.keyPattern.pattern() + "=" + this.valuePattern;
    }

    public String toString() {
        return this.section.getSymbol() + "[" + this.metadata + "]" + this.key + "=" + this.value;
    }

    public int hashCode() {
        final int PRIME = 31;
        int result = 1;
        result = PRIME * result + ((this.key == null) ? 0 : this.key.hashCode());
        result = PRIME * result + ((this.metadata == null) ? 0 : this.metadata.hashCode());
        result = PRIME * result + ((this.section == null) ? 0 : this.section.hashCode());
        result = PRIME * result + ((this.value == null) ? 0 : this.value.hashCode());
        return result;
    }

    public boolean equals(final Object obj) {
        if ( this == obj ) {
            return true;
        }
        if ( obj == null ) {
            return false;
        }
        if ( getClass() != obj.getClass() ) {
            return false;
        }
        final AbstractDSLMappingEntry other = (AbstractDSLMappingEntry) obj;
        if ( this.key == null ) {
            if ( other.key != null ) {
                return false;
            }
        } else if ( !this.key.equals( other.key ) ) {
            return false;
        }
        if ( this.metadata == null ) {
            if ( other.metadata != null ) {
                return false;
            }
        } else if ( !this.metadata.equals( other.metadata ) ) {
            return false;
        }
        if ( this.section == null ) {
            if ( other.section != null ) {
                return false;
            }
        } else if ( !this.section.equals( other.section ) ) {
            return false;
        }
        if ( this.value == null ) {
            if ( other.value != null ) {
                return false;
            }
        } else if ( !this.value.equals( other.value ) ) {
            return false;
        }
        return true;
    }

    public List getErrors() {
        return Collections.EMPTY_LIST;
    }

}
