package org.apache.kafka.common

public class Endpoint {

    private final String listenerName;
    private final SecurityProtocol securityProtocol;
    private final String host;
    private final int port;

    public Endpoint(String listenerName, SecurityProtocol securityProtocol, String host, int port) {
        this.listenerName = listenerName;
        this.securityProtocol = securityProtocol;
        this.host = host;
        this.port = port;
    }

    /**
     * Returns the listener name of this endpoint.
     */
    public String listener() {
        return listenerName;
    }

    /**
     * Returns the listener name of this endpoint. This is non-empty for endpoints provided
     * to broker plugins, but may be empty when used in clients.
     * @deprecated Since 4.1. Use {@link #listener} instead. This function will be removed in 5.0.
     */
    @Deprecated
    public Optional<String> listenerName() {
        return Optional.ofNullable(listenerName);
    }

    /**
     * Returns the security protocol of this endpoint.
     */
    public SecurityProtocol securityProtocol() {
        return securityProtocol;
    }

    /**
     * Returns advertised host name of this endpoint.
     */
    public String host() {
        return host;
    }

    /**
     * Returns the port to which the listener is bound.
     */
    public int port() {
        return port;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof Endpoint)) {
            return false;
        }

        Endpoint that = (Endpoint) o;
        return Objects.equals(this.listenerName, that.listenerName) &&
            Objects.equals(this.securityProtocol, that.securityProtocol) &&
            Objects.equals(this.host, that.host) &&
            this.port == that.port;

    }

    @Override
    public int hashCode() {
        return Objects.hash(listenerName, securityProtocol, host, port);
    }

    @Override
    public String toString() {
        return "Endpoint(" +
            "listenerName='" + listenerName + '\'' +
            ", securityProtocol=" + securityProtocol +
            ", host='" + host + '\'' +
            ", port=" + port +
            ')';
    }
}

public class RaftVoterEndpoint {
    private final String listener;
    private final String host;
    private final int port;

    static String requireNonNullAllCapsNonEmpty(String input) {
        if (input == null) {
            throw new IllegalArgumentException("Null argument not allowed.");
        }
        if (!input.trim().equals(input)) {
            throw new IllegalArgumentException("Leading or trailing whitespace is not allowed.");
        }
        if (input.isEmpty()) {
            throw new IllegalArgumentException("Empty string is not allowed.");
        }
        if (!input.toUpperCase(Locale.ROOT).equals(input)) {
            throw new IllegalArgumentException("String must be UPPERCASE.");
        }
        return input;
    }

    /**
     * Create an endpoint for a metadata quorum voter.
     *
     * @param listener          The human-readable name for this endpoint. For example, CONTROLLER.
     * @param host              The DNS hostname for this endpoint.
     * @param port              The network port for this endpoint.
     */
    public RaftVoterEndpoint(
        String listener,
        String host,
        int port
    ) {
        this.listener = requireNonNullAllCapsNonEmpty(listener);
        this.host = Objects.requireNonNull(host);
        this.port = port;
    }

    /**
     * @deprecated Since 4.1. Use {@link #listener} instead. This function will be removed in 5.0.
     */
    @Deprecated
    public String name() {
        return listener;
    }

    /**
     * The listener name for this endpoint.
     */
    public String listener() {
        return listener;
    }

    public String host() {
        return host;
    }

    public int port() {
        return port;
    }

    @Override
    public boolean equals(Object o) {
        if (o == null || (!o.getClass().equals(getClass()))) return false;
        RaftVoterEndpoint other = (RaftVoterEndpoint) o;
        return listener.equals(other.listener) &&
            host.equals(other.host) &&
            port == other.port;
    }

    @Override
    public int hashCode() {
        return Objects.hash(listener, host, port);
    }

    @Override
    public String toString() {
        // enclose IPv6 hosts in square brackets for readability
        String hostString = host.contains(":") ? "[" + host + "]" : host;
        return listener + "://" + hostString + ":" + port;
    }
}