using DarkRift;
using DarkRift.Client.Unity;
using UnityEngine;

/// <summary>
///     Handles a controllable character.
/// </summary>
internal class BlockCharacter : MonoBehaviour
{
    /// <summary>
    ///     The DarkRift client to send data though.
    /// </summary>
    UnityClient client;

    /// <summary>
    ///     The ID of this player.
    /// </summary>
    public ushort PlayerID { get; set; }

    /// <summary>
    ///     The world this player is in.
    /// </summary>
    BlockWorld blockWorld;
    
    /// <summary>
    ///     The last position our character was at.
    /// </summary>
    Vector3 lastPosition;

    /// <summary>
    ///     The last rotation our character was at.
    /// </summary>
    Vector3 lastRotation;

    void Update ()
    {
        if (client == null)
        {
            Debug.LogError("No client assigned to BlockCharacter component!");
            return;
        }

        if (PlayerID == client.ID)
        {
            if (Vector3.SqrMagnitude(transform.position - lastPosition) > 0.1f ||
                Vector3.SqrMagnitude(transform.eulerAngles - lastRotation) > 5f)
                SendTransform();

            if (Input.GetMouseButtonDown(0))
            {
                //Get a point 2 meters in front of the center-point of the camera
                Vector3 pos = Camera.main.ScreenToWorldPoint(new Vector3(Screen.width / 2, Screen.height / 2, 2f));

                //Destroy the block there!
                blockWorld.DestroyBlock(pos);
            }

            if (Input.GetMouseButtonDown(1))
            {
                //Get a point 2 meters in front of the center-point of the camera
                Vector3 pos = Camera.main.ScreenToWorldPoint(new Vector3(Screen.width/2, Screen.height/2, 2f));

                //Place a block there!
                blockWorld.AddBlock(pos);
            }
        }
    }
    
    /// <summary>
    ///     Sets up the character with necessary references.
    /// </summary>
    /// <param name="client">The client to send data using.</param>
    /// <param name="blockWorld">The block world reference.</param>
    public void Setup(UnityClient client, BlockWorld blockWorld)
    {
        this.client = client;

        this.blockWorld = blockWorld;
    }

    /// <summary>
    ///     Sends the position and rotation of this character.
    /// </summary>
    void SendTransform()
    {
        //Serialize
        using (DarkRiftWriter writer = DarkRiftWriter.Create())
        {
            writer.Write(transform.position.x);
            writer.Write(transform.position.y);
            writer.Write(transform.position.z);
            writer.Write(transform.eulerAngles.x);
            writer.Write(transform.eulerAngles.y);
            writer.Write(transform.eulerAngles.z);

            //Send
            using (Message message = Message.Create(BlockTags.Movement, writer))
                client.SendMessage(message, SendMode.Unreliable);
        }

        //Store last values sent
        lastPosition = transform.position;
        lastRotation = transform.eulerAngles;
    }
}