//--------------------------------------------------------
//    [Author]:           第二世界
//    [  Date ]:           Tuesday, October 31, 2017
//--------------------------------------------------------
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using UnityEngine.UI;

namespace Snxxz.UI
{

    public class FunctionButtonGroup : MonoBehaviour
    {
        public int unLockedCount {
            get {
                var count = 0;
                foreach (var button in toggleButtons.Values)
                {
                    if (button.state != TitleBtnState.Locked)
                    {
                        count++;
                    }
                }

                return count;
            }
        }

        int currentOrder = 0;
        List<int> orders = new List<int>();
        Dictionary<int, FunctionButton> toggleButtons = new Dictionary<int, FunctionButton>();

        public void Register(FunctionButton _toggleButton)
        {
            toggleButtons[_toggleButton.order] = _toggleButton;
            if (!orders.Contains(_toggleButton.order))
            {
                orders.Add(_toggleButton.order);
                orders.Sort(OrderCompare);
            }
        }

        public void UnRegister(FunctionButton _toggleButton)
        {
            if (toggleButtons.ContainsKey(_toggleButton.order))
            {
                toggleButtons.Remove(_toggleButton.order);
            }

            if (orders.Contains(_toggleButton.order))
            {
                orders.Remove(_toggleButton.order);
                orders.Sort(OrderCompare);
            }

        }

        public void NotifyToggleOn(FunctionButton _toggleButton)
        {
            if (_toggleButton.state == TitleBtnState.Click)
            {
                currentOrder = _toggleButton.order;
                for (int i = 0; i < orders.Count; i++)
                {
                    var toggleButton = toggleButtons[orders[i]];
                    if (toggleButton != _toggleButton && toggleButton.state != TitleBtnState.Locked)
                    {
                        toggleButton.state = TitleBtnState.Normal;
                    }
                }
            }
        }

        public void TriggerByOrder(int _order)
        {
            for (int i = 0; i < orders.Count; i++)
            {
                var order = orders[i];
                if (order == _order)
                {
                    toggleButtons[order].Invoke(true);
                    break;
                }
            }
        }

        public void TriggerLast()
        {
            var index = orders.IndexOf(currentOrder);
            if (index < 0)
            {
                return;
            }

            var loopTimes = 0;
            while (loopTimes < 2)
            {
                index--;
                if (index < 0)
                {
                    index = orders.Count - 1;
                    loopTimes++;
                }

                var next = orders[index];
                if (toggleButtons[next].state != TitleBtnState.Locked)
                {
                    toggleButtons[next].Invoke(false);
                    break;
                }
            }

        }

        public void TriggerNext()
        {
            var index = orders.IndexOf(currentOrder);
            if (index < 0)
            {
                return;
            }

            var loopTimes = 0;
            while (loopTimes < 2)
            {
                index++;
                if (index > orders.Count - 1)
                {
                    index = 0;
                    loopTimes++;
                }

                var next = orders[index];
                if (toggleButtons[next].state != TitleBtnState.Locked)
                {
                    toggleButtons[next].Invoke(false);
                    break;
                }
            }
        }

        public bool IsFirst()
        {
            return orders.Count > 0 && currentOrder == orders[0];
        }

        public bool IsLast()
        {
            return orders.Count > 0 && currentOrder == orders[orders.Count - 1];
        }

        private int OrderCompare(int a, int b)
        {
            return a < b ? -1 : 1;
        }
    }

}