using Core.Utilities;
using UnityEngine;
using KTGMGemClient;

namespace TowerDefense.Towers.Placement
{
    /// <summary>
    /// An interface for a placement area that can contain a tower
    /// </summary>
    public interface IPlacementArea
    {
        /// <summary>
        /// Gets this object's transform
        /// </summary>
        Transform transform { get; }

        /// <summary>
        /// 获取当前PlaceMentArea的Size.
        /// </summary>
        IntVector2 getdimsize();

        /// <summary>
        /// 获取一个可以放置塔防的位置.
        /// </summary>
        /// <returns></returns>
        IntVector2 getFreePos(int xdim, int ydim, bool forceGet = false);


        /// <summary>
        /// 获取对应位置的充能子弹界面指针.
        /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <returns></returns>
        BulletUICtl GetBulletUICtl(int x, int y);

        /// <summary>
        /// 获取对应位置的能量条界面指针.
        /// </summary>
        /// <param name="x"></param>
        /// <returns></returns>
        EnergyUICtl GetEnergyUICtl(int x, int y);

        /// <summary>
        /// 获取对应位置的水精灵充能条
        /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <returns></returns>
        FreezeBreath GetFreezeBreath(int x, int y);

        /// <summary>
        /// 是否空置的攻击位
        /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <returns></returns>
        bool isFreeAtackPos(int x, int y);

        /// <summary>
        /// 是否有已开启的可放置攻击位置。
        /// </summary>
        /// <returns></returns>
        bool hasFreeAttackPos();

        /// <summary>
        /// 是否是等待购买的攻击塔位.
        /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <returns></returns>
        bool isWaitBuyGrid(int x, int y);

        void startCoinGenMode();

        /// <summary>
        /// 购买对应的待购攻击塔位.
        /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <returns></returns>
        bool buyWaitBuyGrid(int x, int y);

        /// <summary>
        /// 设置某一个格子为已破坏塔位。
        /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <returns></returns>
        bool SetDestroyedGrid(int x, int y);

        /// <summary>
        /// 设置格子为合成状态。
        /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <returns></returns>
        bool SetComboGrid(int x, int y);

        /// <summary>
        /// 设置塔位的血条血量数据
        /// </summary>
        /// <param name="ix"></param>
        /// <param name="health"></param>
        void setTowerPosHealth(int ix, float health);

        /// <summary>
        /// Calculates the grid position from a given world position, offset to center for a specific size object
        /// </summary>
        IntVector2 WorldToGrid(Vector3 worldPosition, IntVector2 sizeOffset);

        /// <summary>
        /// Calculates the snapped world position from a given grid position
        /// </summary>
        Vector3 GridToWorld(IntVector2 gridPosition, IntVector2 sizeOffset);

        /// <summary>
        /// 当前是否是反方的TowerPlacementGrid.
        /// </summary>
        bool isOpponent();


        /// <summary>
        /// Gets whether an object of a given size would fit on this grid at the given location
        /// </summary>
        /// <param name="gridPos">The grid location</param>
        /// <param name="size">The size of the item</param>
        /// <returns>True if the item would fit at <paramref name="gridPos"/></returns>
        TowerFitStatus Fits(IntVector2 gridPos, IntVector2 size);

        /// <summary>
        /// Occupy the given space on this placement area
        /// </summary>
        /// <param name="gridPos">The grid location</param>
        /// <param name="size">The size of the item</param>
        void Occupy(IntVector2 gridPos, IntVector2 size);

        /// <summary>
        /// Clear the given space on this placement area
        /// </summary>
        /// <param name="gridPos">The grid location</param>
        /// <param name="size">The size of the item</param>
        void Clear(IntVector2 gridPos, IntVector2 size);
    }

    public static class PlacementAreaExtensions
    {
        /// <summary>
        /// Snaps a given world positionn to this grid
        /// </summary>
        public static Vector3 Snap(this IPlacementArea placementArea, Vector3 worldPosition, IntVector2 sizeOffset)
        {
            // Calculate the nearest grid location and then change that back to world space
            return placementArea.GridToWorld(placementArea.WorldToGrid(worldPosition, sizeOffset), sizeOffset);
        }
    }
}