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

public class CameraOrbit : MonoBehaviour
{
    public static CameraOrbit Instance;
    bool controlOn;

    EventSystem eventSystem;

    [Header("Orbit Camera")]
    public float CamZoomMin = 1, CamZoomMax = 15;

    public float CamZoom = 2.4f;
    public float MoveSpeed = 1;
    public float ZoomSpeed = 1f;
    public Camera Camera;

    private void Awake()
    {
        Instance = this;
        Camera = GetComponent<Camera>();
        eventSystem = EventSystem.current;
    }

    void Update()
    {
        OrbitAround(false);
    }

    float baseZoom;
    float baseDist;
    Vector2 lastMouse;
    Vector2 lastTouch;
    int lastTouchCount;
    bool lastControlOn;

    void OrbitAround(bool aroundCharacter = false)
    {
        Vector2 mouse = Input.mousePosition;
        Vector2 mouseDelta = Vector2.zero;
        Vector2 touchDelta = Vector2.zero;
        Vector3 position = transform.position;

        if (Input.GetMouseButtonDown(0) && Input.touchCount == 0 && !eventSystem.IsPointerOverGameObject())
        {
            Debug.Log("Mouse");
            lastControlOn = false;
            controlOn = true;
        }
        if (Input.GetMouseButton(0) && controlOn)
        {
            if(lastControlOn == false)
            {
                lastControlOn = true;
                mouseDelta = Vector2.zero;
            }
            else
            {
                mouseDelta = (mouse - lastMouse) * Time.deltaTime;
            }
            position -= mouseDelta.x * MoveSpeed * transform.right;
            position -= mouseDelta.y * MoveSpeed * transform.up;
            position.x = Mathf.Clamp(position.x, -5, 5);
            position.y = Mathf.Clamp(position.y, -5, 5);
            lastMouse = mouse;
        }
        else
        {
            controlOn = false;
        }

        if (!eventSystem.IsPointerOverGameObject())
        {
            SetZoom(CamZoom - Input.mouseScrollDelta.y * ZoomSpeed);
        }

        float camDist = CamZoom;
        Camera.orthographicSize = camDist;
        transform.position = position;
    }

    public void SetZoom(string value)
    {
        SetZoom(float.Parse(value, CultureInfo.InvariantCulture));
    }

    public void SetZoom(float value)
    {
        value = Mathf.Round(value * 1000) / 1000;
        CamZoom = Mathf.Clamp(value, CamZoomMin, CamZoomMax);
    }

    public void SetZoomSpeed(float value)
    {
        ZoomSpeed = value;
    }

    public void SetMoveSpeed(float value)
    {
        MoveSpeed = value;
    }
}