using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

/// <summary>
/// This class is used pretty much anywhere in order to make the "first step" of networking.
/// It adds the proper components to World Root and tells them to start.
/// </summary>
public class NetworkEstablisher : MonoBehaviour {

    /// <summary>
    /// Input field for the IP to which connect to.
    /// </summary>
    [Tooltip("Required field only if StartClient() is used.")]
    public InputField IPField;
    /// <summary>
    /// Input field for the client port
    /// </summary>
    [Tooltip("Required field only if StartClient() is used.")]
    public InputField ClientPortField;

    /// <summary>
    /// Input field for the server port
    /// </summary>
    [Tooltip("Required field only if StartServer() is used.")]
    public InputField ServerPortField;

    /// <summary>
    /// World Root node, a GameObject.
    /// </summary>
    public GameObject WorldRoot;

	// Use this for initialization
	void Start () {
        Term.AddCommand("join", "joins a server at localhost:3935", (args) => {
            StartClient("localhost", 3935);
        });
        Term.AddCommand("join (ip)", "joins a server at given ip and port 3935", (args) => {
            string ip = args[0];
            StartClient(ip, 3935);
        });
        Term.AddCommand("join (ip) (port)", "joins a server at given ip and port", (args) => {
            string ip = args[0];
            int port = 3935;
            int.TryParse(args[1], out port);
            StartClient(ip, port);
        });

        Term.AddCommand("host", "host a server at port 3935", (args) => {
            StartServer(3935);
        });
        Term.AddCommand("host (port)", "host a server at given port", (args) => {
            int port = 3935;
            int.TryParse(args[0], out port);
            StartServer(port);
        });
    }

    /// <summary>
    /// Starts the client using given input fields. Otherwise functions like <see cref="StartClient(string, int)"/>.
    /// </summary>
    public void StartClient() {
        string IP = IPField.text;
        if (IP.Length == 0) {
            IP = "localhost";
        }
        string PortText = ClientPortField.text;
        int Port = 3935;
        if (PortText.Length > 0) {
            Port = Int32.Parse(PortText);
        }
        StartClient(IP, Port);
    }

    /// <summary>
    /// Starts the client with the given ip and port.
    /// This initializes the Client component and launches it properly.
    /// </summary>
    /// <param name="ip">IP used to connect.</param>
    /// <param name="port">port of the host.</param>
    public void StartClient(string ip, int port) {
        WorldRoot.AddComponent<Client>();
        Client.Launch(ip, port);
    }

    /// <summary>
    /// Starts the server using given input fields. Otherwise functions like <see cref="StartServer(int)"/>.
    /// </summary>
    public void StartServer() {
        string PortText = ServerPortField.text;
        int Port = 3935;
        if (PortText.Length > 0) {
            Port = Int32.Parse(PortText);
        }
        StartServer(Port);
    }

    /// <summary>
    /// Starts the server using given port.
    /// This initializes the port and launches the server properly.
    /// </summary>
    /// <param name="port">port used for the server.</param>
    public void StartServer(int port) {
        WorldRoot.AddComponent<Server>();
        Server.Launch(port);
    }
}