using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using DeathBook.Model;

public class NetworkingSphere : MonoBehaviour
{
    public FriendshipLink LinkObj;
    public PersonNode PersonObj;
    public int NumPeople = 50;
    public int AvgNumFriends = 20;
    public float FriendshipLikeliness = 0.4f;
    public float SphereRadius = 1f;
    public float rotationSpeed = 0.7f;

    public float torqueForce = 50f;

    public PersonDetailsPanel DetailsPanel;

    private bool dragging = false;
    private Vector3 delta = new Vector3();
    private Rigidbody rb;

    private PersonNode[] peopleNodes;
    //TODO private Friendship[] friendships;

    private PersonNode _selectedNode;

    void Awake()
    {
        LevelGenerator lGen = new LevelGenerator();
        Level lvl = lGen.GenerateLevel(NumPeople, AvgNumFriends, FriendshipLikeliness, SphereRadius);

        InstantiateNodes(lvl);
        AssignLinks(lvl);
        rb = GetComponent<Rigidbody>();
    }

    void Update()
    {
        //TEMPORARY QUICK FIX: Even though we are never moving the sphere, it starts moving as soon as it stops rotating
        transform.position = Vector3.zero;

        Vector3 screenMousePos = Input.mousePosition;

        screenMousePos.z = transform.position.z - Camera.main.transform.position.z;

        Vector3 worldMousePos = Camera.main.ScreenToWorldPoint(screenMousePos);

        // If the world position of the mouse is greater than the radius of the sphere, we are outside
        if (Mathf.Sqrt(worldMousePos.x * worldMousePos.x + worldMousePos.y * worldMousePos.y) > SphereRadius + 1f)
        {
            transform.Rotate(Vector3.one * Time.deltaTime * rotationSpeed);
        }

        //when right btn clicked, call MoveSphere
        if (Input.GetMouseButtonDown(1))
        {
            dragging = true;
        }
        else if (Input.GetMouseButtonUp(1))
        {
            dragging = false;
            delta = new Vector3();
        }

        if (dragging)
        {
            MoveSphere();
        }

        //scroll
        if (Input.GetAxis("Mouse ScrollWheel") != 0)
        {
            Camera.main.fieldOfView += Input.GetAxis("Mouse ScrollWheel") * 10f;
        }
    }

    void MoveSphere()
    {
        float deltaX = Input.GetAxis("Mouse X");
        float deltaY = Input.GetAxis("Mouse Y");
        if (deltaX == 0 && deltaY == 0)
        {
            delta = new Vector3();
            rb.angularVelocity *= 0.8f;
        }
        delta += new Vector3(deltaX, deltaY, 0);

        rb.AddTorque(Vector3.down * delta.x * torqueForce * Time.deltaTime, ForceMode.Impulse);
        rb.AddTorque(Vector3.right * delta.y * torqueForce * Time.deltaTime, ForceMode.Impulse);
    }

    private void InstantiateNodes(Level lvl)
    {
        peopleNodes = new PersonNode[lvl.people.Count];

        for (int i = 0; i < lvl.people.Count; i++)
        {
            Person person = lvl.people[i];

            PersonNode pInst = Instantiate(PersonObj, person.initialPosition, Quaternion.identity) as PersonNode;

            pInst.OnClicked += OnNodeClicked;

            pInst.Model = person;
            pInst.transform.parent = this.transform;

            peopleNodes[i] = pInst;
        }
    }

    private void OnNodeClicked(PersonNode node)
    {
        if (_selectedNode != null)
        {
            _selectedNode.Select(false);
        }

        DetailsPanel.SetNode(node);
        node.Select(true);

        _selectedNode = node;
    }

    private void AssignLinks(Level lvl)
    {
        foreach (Friendship f in lvl.friendships)
        {
            FriendshipLink link = Instantiate(LinkObj) as FriendshipLink;
            int id1 = f.friend1.id;
            int id2 = f.friend2.id;
            link.AttachToObjects(peopleNodes[id1].gameObject, peopleNodes[id2].gameObject);

            // Temporary stuff, for testing
            peopleNodes[id1].AddLink(link);
            peopleNodes[id2].AddLink(link);
        }
    }
}