/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. 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.
 * ============LICENSE_END=========================================================
 */
package org.openecomp.sdc.be.model.tosca;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import lombok.AllArgsConstructor;
import lombok.Getter;
import org.openecomp.sdc.be.model.tosca.constraints.ConstraintUtil;
import org.openecomp.sdc.be.model.tosca.constraints.exception.ConstraintValueDoNotMatchPropertyTypeException;

/**
 * The primitive type that TOSCA YAML supports.
 *
 * @author mkv
 */
@AllArgsConstructor
public enum ToscaType {
    // @formatter:off
	STRING("string"),
	INTEGER("integer"),
	FLOAT("float"),
	BOOLEAN("boolean"),
	TIMESTAMP("timestamp"),
	VERSION("version"),
	LIST("list"),
	MAP("map"),
	SCALAR_UNIT("scalar-unit"),
	SCALAR_UNIT_SIZE("scalar-unit.size"),
	SCALAR_UNIT_TIME("scalar-unit.time"),
	SCALAR_UNIT_FREQUENCY("scalar-unit.frequency");
    // @formatter:on

    @Getter
    private final String type;

    public static ToscaType getToscaType(String typeName) {
        if (typeName == null) {
            return null;
        }
        for (ToscaType type : ToscaType.values()) {
            if (type.getType().equals(typeName)) {
                return type;
            }
        }
        return null;
    }

    public static boolean isPrimitiveType(String dataTypeName) {
        if (!ToscaPropertyType.MAP.getType().equals(dataTypeName) && !ToscaPropertyType.LIST.getType().equals(dataTypeName)) {
            return isValidType(dataTypeName) != null;
        }
        return false;
    }

    public static ToscaType isValidType(String typeName) {
        if (typeName == null) {
            return null;
        }
        for (ToscaType type : ToscaType.values()) {
            if (type.getType().equals(typeName)) {
                return type;
            }
        }
        return null;
    }

    public static boolean isCollectionType(String type) {
        return ToscaPropertyType.MAP.getType().equals(type) || ToscaPropertyType.LIST.getType().equals(type);
    }

    public boolean isValidValue(String value) {
        switch (this) {
            case BOOLEAN:
                return value.equalsIgnoreCase("true") || value.equalsIgnoreCase("false");
            case FLOAT:
                return isFloat(value);
            case INTEGER:
                return isInteger(value);
            case STRING:
            case SCALAR_UNIT:
            case SCALAR_UNIT_SIZE:
            case SCALAR_UNIT_TIME:
            case SCALAR_UNIT_FREQUENCY:
                return true;
            case TIMESTAMP:
                try {
                    new SimpleDateFormat("MMM dd, yyyy hh:mm:ss a", Locale.US).parse(value);
                    return true;
                } catch (ParseException e) {
                    return false;
                }
            case VERSION:
                return VersionUtil.isValid(value);
            case LIST:
                return isList(value);
            case MAP:
                return isMap(value);
            default:
                return false;
        }
    }

    private boolean isList(String value) {
        ObjectMapper objectMapper = new ObjectMapper();
        try {
            objectMapper.readValue(value, new TypeReference<List<Object>>() {
            });
        } catch (IOException e) {
            return false;
        }
        return true;
    }

    private boolean isMap(String value) {
        ObjectMapper objectMapper = new ObjectMapper();
        try {
            objectMapper.readValue(value, new TypeReference<Map<String, Object>>() {
            });
        } catch (IOException e) {
            return false;
        }
        return true;
    }

    private boolean isFloat(String value) {
        try {
            Float.valueOf(value);
        } catch (NumberFormatException e) {
            return false;
        }
        return true;
    }

    private boolean isInteger(String value) {
        try {
            Long.valueOf(value);
        } catch (NumberFormatException e) {
            return false;
        }
        return true;
    }

    public Object convert(String value) {
        switch (this) {
            case STRING:
            case SCALAR_UNIT:
            case SCALAR_UNIT_SIZE:
            case SCALAR_UNIT_TIME:
            case SCALAR_UNIT_FREQUENCY:
                return value;
            case BOOLEAN:
                return Boolean.valueOf(value);
            case FLOAT:
                return Float.valueOf(value);
            case INTEGER:
                return Long.valueOf(value);
            case TIMESTAMP:
                try {
                    return new SimpleDateFormat("MMM dd, yyyy hh:mm:ss a", Locale.US).parse(value);
                } catch (ParseException e) {
                    throw new IllegalArgumentException("Value must be a valid timestamp", e);
                }
            case VERSION:
                return VersionUtil.parseVersion(value);
            case LIST:
                try {
                    return ConstraintUtil.parseToCollection(value, new TypeReference<List<Object>>() {
                    });
                } catch (ConstraintValueDoNotMatchPropertyTypeException e) {
                    throw new IllegalArgumentException("Value must be a valid List", e);
                }
            case MAP:
                try {
                    return ConstraintUtil.parseToCollection(value, new TypeReference<Map<String, Object>>() {
                    });
                } catch (ConstraintValueDoNotMatchPropertyTypeException e) {
                    throw new IllegalArgumentException("Value must be a valid Map", e);
                }
            default:
                return null;
        }
    }

    @Override
    public String toString() {
        return name().toLowerCase();
    }
}