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/*
 * Copyright (c) 2009-2016, Data Geekery GmbH (http://www.datageekery.com)
 * All rights reserved.
 *
 * 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.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
 * database integrations.
 *
 * For more information, please visit: http://www.jooq.org/licenses
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package org.jooq.impl;

import static java.util.Arrays.asList;
import static org.jooq.Clause.TABLE;
import static org.jooq.Clause.TABLE_ALIAS;
import static org.jooq.Clause.TABLE_REFERENCE;
import static org.jooq.SQLDialect.FIREBIRD;
// ...
import static org.jooq.SQLDialect.POSTGRES;

import java.util.Arrays;

import org.jooq.Clause;
import org.jooq.Context;
import org.jooq.Field;
import org.jooq.Record;
import org.jooq.Schema;
import org.jooq.Table;
import org.jooq.tools.StringUtils;

/**
 * A common base type for tables
 * 
 * This type is for JOOQ INTERNAL USE only. Do not reference directly
 *
 * @author Lukas Eder
 */
public class TableImpl extends AbstractTable {

    private static final long     serialVersionUID        = 261033315221985068L;
    private static final Clause[] CLAUSES_TABLE_REFERENCE = { TABLE, TABLE_REFERENCE };
    private static final Clause[] CLAUSES_TABLE_ALIAS     = { TABLE, TABLE_ALIAS };

    final Fields               fields;
    final Alias>         alias;

    protected final Field[]    parameters;

    public TableImpl(String name) {
        this(name, null, null, null, null);
    }

    public TableImpl(String name, Schema schema) {
        this(name, schema, null, null, null);
    }

    public TableImpl(String name, Schema schema, Table aliased) {
        this(name, schema, aliased, null, null);
    }

    public TableImpl(String name, Schema schema, Table aliased, Field[] parameters) {
        this(name, schema, aliased, parameters, null);
    }

    public TableImpl(String name, Schema schema, Table aliased, Field[] parameters, String comment) {
        super(name, schema, comment);

        this.fields = new Fields();

        if (aliased != null) {
            alias = new Alias>(aliased, name);
        }
        else {
            alias = null;
        }

        this.parameters = parameters;
    }

    /**
     * Get the aliased table wrapped by this table
     */
    Table getAliasedTable() {
        if (alias != null) {
            return alias.wrapped();
        }

        return null;
    }

    @Override
    final Fields fields0() {
        return fields;
    }

    @Override
    public final Clause[] clauses(Context ctx) {
        return alias != null ? CLAUSES_TABLE_ALIAS : CLAUSES_TABLE_REFERENCE;
    }

    @Override
    public final void accept(Context ctx) {
        if (alias != null) {
            ctx.visit(alias);
        }
        else {















            accept0(ctx);
        }
    }

    private void accept0(Context ctx) {
        if (ctx.qualify() &&
                (!asList(POSTGRES).contains(ctx.family()) || parameters == null || ctx.declareTables())) {
            Schema mappedSchema = Tools.getMappedSchema(ctx.configuration(), getSchema());

            if (mappedSchema != null) {
                ctx.visit(mappedSchema);
                ctx.sql('.');
            }
        }

        ctx.literal(Tools.getMappedTable(ctx.configuration(), this).getName());

        if (parameters != null && ctx.declareTables()) {

            // [#2925] Some dialects don't like empty parameter lists
            if (ctx.family() == FIREBIRD && parameters.length == 0)
                ctx.visit(new QueryPartList>(parameters));
            else
                ctx.sql('(')
                   .visit(new QueryPartList>(parameters))
                   .sql(')');
        }
    }

    /**
     * Subclasses may override this method to provide custom aliasing
     * implementations
     * 

     * {@inheritDoc}
     */
    @Override
    public Table as(String as) {
        if (alias != null) {
            return alias.wrapped().as(as);
        }
        else {
            return new TableAlias(this, as);
        }
    }

    /**
     * Subclasses may override this method to provide custom aliasing
     * implementations
     * 

     * {@inheritDoc}
     */
    @Override
    public Table as(String as, String... fieldAliases) {
        if (alias != null) {
            return alias.wrapped().as(as, fieldAliases);
        }
        else {
            return new TableAlias(this, as, fieldAliases);
        }
    }

    public Table rename(String rename) {
        return new TableImpl(rename, getSchema());
    }

    /**
     * Subclasses must override this method if they use the generic type
     * parameter  for other types than {@link Record}
     * 
     * {@inheritDoc}
     */
    @SuppressWarnings("unchecked")
    @Override
    public Class getRecordType() {
        return (Class) RecordImpl.class;
    }

    @Override
    public boolean declaresTables() {
        return (alias != null) || (parameters != null) || super.declaresTables();
    }

    // ------------------------------------------------------------------------
    // XXX: Object API
    // ------------------------------------------------------------------------

    @Override
    public boolean equals(Object that) {
        if (this == that) {
            return true;
        }

        // [#2144] TableImpl equality can be decided without executing the
        // rather expensive implementation of AbstractQueryPart.equals()
        if (that instanceof TableImpl) {
            TableImpl other = (TableImpl) that;
            return
                StringUtils.equals(getSchema(), other.getSchema()) &&
                StringUtils.equals(getName(), other.getName()) &&
                Arrays.equals(parameters, other.parameters);
        }

        return super.equals(that);
    }
}