package org.openautonomousconnection.protocol.versions;

import lombok.Getter;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * Enum representing different protocol versions, their types, sides, and compatibility.
 */
public enum ProtocolVersion implements Serializable {
    /**
     * Support for old OAC-Project => <a href="https://repo.open-autonomous-connection.org/Open-Autonomous-Connection/">*_old</a>
     */
    PV_1_0_0_CLASSIC("1.0.0", ProtocolType.CLASSIC, ProtocolSide.WEB_DNS, List.of(Protocol.HTTP)),

    /**
     * First Beta Version of OAC-Protocol
     */
    PV_1_0_0_BETA("1.0.0", ProtocolType.BETA, ProtocolSide.ALL, List.of(Protocol.OAC), PV_1_0_0_CLASSIC);

    /**
     * The version string of the protocol version.
     */
    @Getter
    private final String version;

    /**
     * The type of the protocol version.
     */
    @Getter
    private final ProtocolType protocolType;

    /**
     * The side(s) the protocol version is intended for.
     */
    @Getter
    private final ProtocolSide protocolSide;

    /**
     * List of protocol versions that are compatible with this version.
     */
    @Getter
    private final List<ProtocolVersion> compatibleVersions;

    /**
     * List of supported protocols.
     */
    @Getter
    private final List<Protocol> supportedProtocols;

    /**
     * Constructor for ProtocolVersion enum.
     *
     * @param version            The version string.
     * @param protocolType       The type of the protocol.
     * @param protocolSide       The side(s) the protocol is intended for.
     * @param supportedProtocols List of supported protocols.
     * @param compatibleVersions Varargs of compatible protocol versions.
     */
    ProtocolVersion(String version, ProtocolType protocolType, ProtocolSide protocolSide, List<Protocol> supportedProtocols, ProtocolVersion... compatibleVersions) {
        this.version = version;
        this.protocolType = protocolType;
        this.protocolSide = protocolSide;
        this.compatibleVersions = new ArrayList<>(Arrays.stream(compatibleVersions).toList());
        if (!this.compatibleVersions.contains(this)) this.compatibleVersions.add(this);
        this.supportedProtocols = supportedProtocols;
    }

    /**
     * Returns a string representation of the protocol version, including its version, type, side, supported protocols, and compatible versions.
     * @return a string representation of the protocol version.
     */
    @Override
    public final String toString() {
        StringBuilder compatible = new StringBuilder("[");
        StringBuilder supported = new StringBuilder("[");

        for (ProtocolVersion compatibleVersion : compatibleVersions) compatible.append(compatibleVersion.buildName());
        for (Protocol supportedProtocol : supportedProtocols) supported.append(supportedProtocol.toString());

        compatible.append("]");
        supported.append("]");

        return "{version=" + version + ";type=" + protocolType.toString() + ";side=" + protocolSide.toString() + ";supportedProtocols=" + supported + ";compatibleVersions=" + compatible + "}";
    }

    /**
     * Builds a name for the protocol version combining its version and type.
     * @return a string representing the name of the protocol version.
     */
    public final String buildName() {
        return version + "-" + protocolType.toString();
    }

    /**
     * Enum representing different protocols.
     */
    public enum Protocol implements Serializable {
        HTTP,
        HTTPS,
        OAC;

        /**
         * Returns the name of the protocol in uppercase.
         * @return the name of the protocol in uppercase.
         */
        @Override
        public final String toString() {
            return name().toUpperCase();
        }
    }

    /**
     * Enum representing different types of protocol versions.
     */
    public enum ProtocolType implements Serializable {
        /**
         * Classic Protocol Type, see old OAC-Project: <a href="https://repo.open-autonomous-connection.org/Open-Autonomous-Connection/">*_old</a>
         */
        CLASSIC,

        /**
         * Beta Protocol Type, may be unstable and subject to change.
         */
        BETA,

        /**
         * Stable Protocol Type, recommended for production use.
         */
        STABLE;

        /**
         * Returns the name of the protocol in uppercase.
         * @return the name of the protocol in uppercase.
         */
        @Override
        public final String toString() {
            return name().toUpperCase();
        }
    }

    /**
     * Enum representing different sides where the protocol version can be used.
     */
    public enum ProtocolSide implements Serializable {
        /**
         * Client Side only
         */
        CLIENT, // Protocol version can only used on Client

        /**
         * DNS Server Side only
         */
        DNS,

        /**
         * Web Server Side only
         */
        WEB,

        /**
         * Both DNS and Web Server Side
         */
        WEB_DNS,

        /**
         * Both Client and DNS Server Side
         */
        CLIENT_DNS,

        /**
         * Both Client and Web Server Side
         */
        CLIENT_WEB,

        /**
         * All Sides
         */
        ALL
        ;

        /**
         * Returns the name of the protocol in uppercase.
         * @return the name of the protocol in uppercase.
         */
        @Override
        public final String toString() {
            return name().toUpperCase();
        }
    }
}