/**
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/.
 */
package org.mifosplatform.portfolio.note.serialization;

import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.lang.StringUtils;
import org.mifosplatform.infrastructure.core.data.ApiParameterError;
import org.mifosplatform.infrastructure.core.data.DataValidatorBuilder;
import org.mifosplatform.infrastructure.core.exception.InvalidJsonException;
import org.mifosplatform.infrastructure.core.exception.PlatformApiDataValidationException;
import org.mifosplatform.infrastructure.core.serialization.AbstractFromApiJsonDeserializer;
import org.mifosplatform.infrastructure.core.serialization.FromApiJsonDeserializer;
import org.mifosplatform.infrastructure.core.serialization.FromJsonHelper;
import org.mifosplatform.portfolio.note.command.NoteCommand;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.google.gson.JsonElement;
import com.google.gson.reflect.TypeToken;

/**
 * Implementation of {@link FromApiJsonDeserializer} for {@link NoteCommand} 's.
 */
@Component
public final class NoteCommandFromApiJsonDeserializer extends AbstractFromApiJsonDeserializer<NoteCommand> {

    /**
     * The parameters supported for this command.
     */
    private final Set<String> supportedParameters = new HashSet<>(Arrays.asList("note"));

    private final FromJsonHelper fromApiJsonHelper;

    @Autowired
    public NoteCommandFromApiJsonDeserializer(final FromJsonHelper fromApiJsonHelper) {
        this.fromApiJsonHelper = fromApiJsonHelper;
    }

    @Override
    public NoteCommand commandFromApiJson(final String json) {

        if (StringUtils.isBlank(json)) { throw new InvalidJsonException(); }

        final Type typeOfMap = new TypeToken<Map<String, Object>>() {}.getType();
        this.fromApiJsonHelper.checkForUnsupportedParameters(typeOfMap, json, this.supportedParameters);

        final JsonElement element = this.fromApiJsonHelper.parse(json);
        final String note = this.fromApiJsonHelper.extractStringNamed("note", element);

        return new NoteCommand(note);
    }

    public void validateNote(final String json) {
        if (StringUtils.isBlank(json)) { throw new InvalidJsonException(); }

        final Type typeOfMap = new TypeToken<Map<String, Object>>() {}.getType();
        this.fromApiJsonHelper.checkForUnsupportedParameters(typeOfMap, json, this.supportedParameters);
        final JsonElement element = this.fromApiJsonHelper.parse(json);

        final List<ApiParameterError> dataValidationErrors = new ArrayList<>();

        final DataValidatorBuilder baseDataValidator = new DataValidatorBuilder(dataValidationErrors).resource("note");

        final String note = this.fromApiJsonHelper.extractStringNamed("note", element);
        baseDataValidator.reset().parameter("note").value(note).notBlank().notExceedingLengthOf(1000);

        if (!dataValidationErrors.isEmpty()) { throw new PlatformApiDataValidationException("validation.msg.validation.errors.exist",
                "Validation errors exist.", dataValidationErrors); }

    }
}