using System.Globalization;
using UnityEngine;
using UnityEngine.Events;

namespace AssetUpdate
{
    public class ProjectDownloadAction : AssetDownloadAction
    {
        public const string downloadWin = "Prefab/UpdateGameWin";

        private AssetUpdateWin _updateWin;

        protected override void CreateConfirmUi(UnityAction<bool> callback)
        {
            LiteConfirmWin.Open("游戏更新",
                string.Format("需要下载 {0} 总大小的资源。", GetFileSizeDescription(totalSize)),
                new LiteConfirmButtonData("确定", () => callback(true)));
        }

        protected override void CreateDownloadUi()
        {
            var canvas = Object.FindObjectOfType<Canvas>();
            var prefab = Resources.Load<GameObject>(downloadWin);
            var instance = Object.Instantiate(prefab, canvas.transform);
            _updateWin = instance.GetComponent<AssetUpdateWin>();
            _updateWin.downloadAction = this;
        }

        protected override void ShowComplete()
        {
            _updateWin.ShowComplete();
        }

        protected override void RemoveDownloadUi()
        {
            if (_updateWin)
                Object.Destroy(_updateWin.gameObject);
        }

        private static string GetFileSizeDescription(long size)
        {
            string result;
            const int gSize = 1024 * 1024 * 1024;
            const int mSize = 1024 * 1024;
            const int kSize = 1024;
            // 暂时不整理ToString通用化的问题
            if (size > gSize)
                result = ((double) size / gSize).ToString("#0.##", CultureInfo.InvariantCulture) + "G";
            else if (size > mSize)
                result = ((double) size / mSize).ToString("#0.##", CultureInfo.InvariantCulture) + "M";
            else if (size > kSize)
                result = ((double) size / kSize).ToString("#0.##", CultureInfo.InvariantCulture) + "K";
            else
                result = size.ToString(CultureInfo.InvariantCulture) + "B";
            return result;
        }
    }
}