/*
 * Copyright 2022 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.
 * 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 org.kie.kogito.persistence.postgresql.reporting.bootstrap;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Optional;

import org.junit.jupiter.api.Test;
import org.kie.kogito.event.cloudevents.utils.CloudEventUtils;
import org.kie.kogito.persistence.postgresql.reporting.model.JsonType;
import org.kie.kogito.persistence.postgresql.reporting.model.PostgresField;
import org.kie.kogito.persistence.postgresql.reporting.model.PostgresJsonField;
import org.kie.kogito.persistence.postgresql.reporting.model.PostgresMapping;
import org.kie.kogito.persistence.postgresql.reporting.model.PostgresMappingDefinition;
import org.kie.kogito.persistence.postgresql.reporting.model.PostgresMappingDefinitions;
import org.kie.kogito.persistence.postgresql.reporting.model.PostgresPartitionField;

import com.fasterxml.jackson.core.JsonProcessingException;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

class PostgresBootstrapLoaderImplTest {

    @Test
    void testLoadWithResource() throws JsonProcessingException {
        final PostgresMappingDefinition definition = new PostgresMappingDefinition("mappingId",
                "sourceTableName",
                "sourceTableJsonFieldName",
                List.of(new PostgresField("key")),
                List.of(new PostgresPartitionField("sourceTablePartitionFieldName", "sourceTablePartitionName")),
                "targetTableName",
                List.of(new PostgresMapping("sourceJsonPath",
                        new PostgresJsonField("targetFieldName",
                                JsonType.STRING))));
        final PostgresMappingDefinitions definitions = new PostgresMappingDefinitions(List.of(definition));
        final String json = CloudEventUtils.Mapper.mapper().writeValueAsString(definitions);
        final InputStream is = new ByteArrayInputStream(json.getBytes(StandardCharsets.UTF_8));

        final PostgresBootstrapLoaderImpl loader = new PostgresBootstrapLoaderImpl(() -> is);

        final Optional<PostgresMappingDefinitions> result = loader.load();
        assertNotNull(result);
        assertTrue(result.isPresent());
        assertEquals(1, result.get().getMappingDefinitions().size());

        final PostgresMappingDefinition resultDefinition = result.get().getMappingDefinitions().iterator().next();
        assertEquals(definition, resultDefinition);
    }

    @Test
    void testLoadWithoutResource() {
        final InputStream is = new ByteArrayInputStream("".getBytes(StandardCharsets.UTF_8));

        final PostgresBootstrapLoaderImpl loader = new PostgresBootstrapLoaderImpl(() -> is);

        final Optional<PostgresMappingDefinitions> result = loader.load();
        assertNotNull(result);
        assertTrue(result.isEmpty());
    }

}
