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/*
 *    Copyright 2016-2024 the original author or authors.
 *
 *    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
 *
 *       https://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.mybatis.dynamic.sql.insert.render;

import java.util.Objects;
import java.util.Optional;

import org.mybatis.dynamic.sql.configuration.StatementConfiguration;
import org.mybatis.dynamic.sql.insert.GeneralInsertModel;
import org.mybatis.dynamic.sql.render.RenderingContext;
import org.mybatis.dynamic.sql.render.RenderingStrategy;
import org.mybatis.dynamic.sql.util.Validator;

public class GeneralInsertRenderer {

    private final GeneralInsertModel model;
    private final GeneralInsertValuePhraseVisitor visitor;

    private GeneralInsertRenderer(Builder builder) {
        model = Objects.requireNonNull(builder.model);
        RenderingContext renderingContext = RenderingContext.withRenderingStrategy(builder.renderingStrategy)
                .withStatementConfiguration(builder.statementConfiguration)
                .build();
        visitor = new GeneralInsertValuePhraseVisitor(renderingContext);
    }

    public GeneralInsertStatementProvider render() {
        FieldAndValueCollector collector = model.columnMappings()
                .map(m -> m.accept(visitor))
                .filter(Optional::isPresent)
                .map(Optional::get)
                .collect(FieldAndValueCollector.collect());

        Validator.assertFalse(collector.isEmpty(), "ERROR.9"); //$NON-NLS-1$

        String insertStatement = InsertRenderingUtilities.calculateInsertStatement(model.table(), collector);

        return DefaultGeneralInsertStatementProvider.withInsertStatement(insertStatement)
                .withParameters(collector.parameters())
                .build();
    }

    public static Builder withInsertModel(GeneralInsertModel model) {
        return new Builder().withInsertModel(model);
    }

    public static class Builder {
        private GeneralInsertModel model;
        private RenderingStrategy renderingStrategy;
        private StatementConfiguration statementConfiguration;

        public Builder withInsertModel(GeneralInsertModel model) {
            this.model = model;
            return this;
        }

        public Builder withRenderingStrategy(RenderingStrategy renderingStrategy) {
            this.renderingStrategy = renderingStrategy;
            return this;
        }

        public Builder withStatementConfiguration(StatementConfiguration statementConfiguration) {
            this.statementConfiguration = statementConfiguration;
            return this;
        }

        public GeneralInsertRenderer build() {
            return new GeneralInsertRenderer(this);
        }
    }
}