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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2016-2024 Objectionary.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.eolang.jeo.representation.asm;

import java.util.Collection;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.eolang.jeo.representation.bytecode.BytecodeAnnotationAnnotationValue;
import org.eolang.jeo.representation.bytecode.BytecodeAnnotationValue;
import org.eolang.jeo.representation.bytecode.BytecodeArrayAnnotationValue;
import org.eolang.jeo.representation.bytecode.BytecodeEnumAnnotationValue;
import org.eolang.jeo.representation.bytecode.BytecodePlainAnnotationValue;
import org.objectweb.asm.tree.AnnotationNode;

/**
 * Asm annotation property.
 * @since 0.6
 */
final class AsmAnnotationProperty {

    /**
     * Property name.
     */
    private final String name;

    /**
     * Property value.
     */
    private final Object value;

    /**
     * Constructor.
     * @param value Property value.
     */
    AsmAnnotationProperty(final Object value) {
        this(null, value);
    }

    /**
     * Constructor.
     * @param name Property name.
     * @param value Property value.
     */
    AsmAnnotationProperty(final String name, final Object value) {
        this.name = name;
        this.value = value;
    }

    /**
     * Convert asm annotation property to domain annotation property.
     * @return Domain annotation.
     */
    BytecodeAnnotationValue bytecode() {
        return AsmAnnotationProperty.property(this.name, this.value);
    }

    /**
     * Convert asm annotation property to domain annotation property.
     * @param name Property name.
     * @param value Property value.
     * @return Domain annotation.
     */
    private static BytecodeAnnotationValue property(final String name, final Object value) {
        final BytecodeAnnotationValue result;
        if (value instanceof String[]) {
            final String[] params = (String[]) value;
            result = new BytecodeEnumAnnotationValue(name, params[0], params[1]);
        } else if (value instanceof AnnotationNode) {
            final AnnotationNode cast = AnnotationNode.class.cast(value);
            result = new BytecodeAnnotationAnnotationValue(
                name,
                cast.desc,
                Optional.ofNullable(cast.values)
                    .map(Collection::stream)
                    .orElseGet(Stream::empty)
                    .map(val -> AsmAnnotationProperty.property("", val))
                    .collect(Collectors.toList())
            );
        } else if (value instanceof List) {
            result = new BytecodeArrayAnnotationValue(
                name,
                ((Collection) value).stream()
                    .map(val -> AsmAnnotationProperty.property("", val))
                    .collect(Collectors.toList())
            );
        } else {
            result = new BytecodePlainAnnotationValue(name, value);
        }
        return result;
    }

}