/*
 * Adapted from The MIT License (MIT)
 *
 * Copyright (c) 2018-2022 DaPorkchop_
 *
 * 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:
 *
 * Any persons and/or organizations using this software must include the above copyright notice and this permission notice,
 * provide sufficient credit to the original authors of the project (IE: DaPorkchop_), as well as provide a link to the original project.
 *
 * 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 NONINFRINGEMENT. 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 net.daporkchop.lib.binary.oio.appendable;

import io.netty.buffer.ByteBuf;
import lombok.AccessLevel;
import lombok.Getter;
import lombok.NonNull;
import lombok.RequiredArgsConstructor;
import lombok.experimental.Accessors;
import net.daporkchop.lib.binary.chars.SingleCharSequence;
import net.daporkchop.lib.common.misc.string.PStrings;
import net.daporkchop.lib.common.system.PlatformInfo;

import java.nio.charset.StandardCharsets;

/**
 * Implementation of {@link PAppendable} that appends UTF-8-encoded text to a {@link ByteBuf}.
 * <p>
 * This implementation is not thread-safe.
 *
 * @author DaPorkchop_
 */
@RequiredArgsConstructor
@Getter
@Accessors(fluent = true)
public final class UTF8ByteBufAppendable implements PAppendable {
    @NonNull
    protected final ByteBuf buf;
    @NonNull
    protected final String lineEnding;
    @Getter(AccessLevel.NONE)
    protected final SingleCharSequence singleCharSequence = new SingleCharSequence();

    public UTF8ByteBufAppendable(@NonNull ByteBuf buf) {
        this(buf, PlatformInfo.OPERATING_SYSTEM.lineEnding());
    }

    @Override
    public UTF8ByteBufAppendable append(CharSequence seq) {
        this.buf.writeCharSequence(seq == null ? "null" : seq, StandardCharsets.UTF_8);
        return this;
    }

    @Override
    public UTF8ByteBufAppendable append(CharSequence seq, int start, int end) {
        this.buf.writeCharSequence(PStrings.subSequence(seq == null ? "null" : seq, start, end), StandardCharsets.UTF_8);
        return this;
    }

    @Override
    public UTF8ByteBufAppendable append(char c) {
        this.buf.writeCharSequence(this.singleCharSequence.letter(c), StandardCharsets.UTF_8);
        return this;
    }

    @Override
    public UTF8ByteBufAppendable appendLn() {
        return this.append(this.lineEnding);
    }

    @Override
    public void close() {
        //no-op
    }
}
