using System;
using System.IO;
using UnityEngine;

namespace BF
{
    /// <summary>
    /// todo 对首包和ab_config.bytes简单加密
    /// </summary>
    public abstract class GameLaunchProcessorBase
    {
        protected const string ASSETS_FIRST_AB = "first/first.ab";

        protected static string ABConfigFileName { get { return GameLaunchUtils.ABCONFIG_FILE_NAME; } }
        protected static string StreamingAbccPath { get; private set; }
        protected static string PersistentAbccPath { get; private set; }
        protected static string UpdateDirPath { get; private set; }             // 热更目录
        protected static string TempUpdateDirPath { get; private set; }         // 下载文件临时目录

        protected GameLaunchProcessorBase nextProcessor;

        static GameLaunchProcessorBase()
        {
            StreamingAbccPath = Path.Combine(Application.streamingAssetsPath, GameLaunchUtils.ABCONFIG_FILE_NAME);
            PersistentAbccPath = Path.Combine(Application.persistentDataPath, GameLaunchUtils.ABCONFIG_FILE_NAME);
            UpdateDirPath = Path.Combine(Application.persistentDataPath, "update");
            TempUpdateDirPath = Path.Combine(Application.persistentDataPath, "temp");
        }

        public GameLaunchProcessorBase() { }

        public GameLaunchProcessorBase(GameLaunchProcessorBase nextProcessor)
        {
            this.nextProcessor = nextProcessor;
        }

        public virtual void Process(LaunchRequester lr)
        {
            BFMain.Instance.GameLaunchMgr.SetCurrentProcessor(this);
        }

        public virtual void Update() { }

        protected void NextProcess(LaunchRequester lr)
        {
            if (nextProcessor != null)
            {
                nextProcessor.Process(lr);
            }
        }

        /// <summary>
        /// 包内版本号大于热更目录的版本号说明更了新包
        /// </summary>
        public bool IsPersistentLessThanPackageVersion(string packageVersion, string persistentVersion)
        {
            if (string.IsNullOrEmpty(persistentVersion) || string.IsNullOrEmpty(packageVersion))
            {
                return false;
            }
            var persistentNums = persistentVersion.Split('.');
            var packageNums = packageVersion.Split('.');
            if (persistentNums.Length < 3 || packageNums.Length < 3)
            {
                return false;
            }
            var persistentNums1 = int.Parse(persistentNums[0]);
            var packageNums1 = int.Parse(packageNums[0]);
            if(persistentNums1 < packageNums1)
            {
                return false;
            }
            else if(persistentNums1 == packageNums1)
            {
                if(int.Parse(persistentNums[1]) < int.Parse(packageNums[1]))
                {
                    return false;
                }
            }
            return true;
        }

        /// <summary>
        /// 低于最低要求版本则需强更
        /// </summary>
        public bool IsClientBiggerThanMinVersion(string minVersion, string clientVersion)
        {
            if (string.IsNullOrEmpty(minVersion) || string.IsNullOrEmpty(clientVersion))
            {
                return false;
            }
            var minNums = minVersion.Split('.');
            var clientNums = clientVersion.Split('.');
            if (minNums.Length < 3 || clientNums.Length < 3)
            {
                return false;
            }
            var clientNums1 = int.Parse(clientNums[0]);
            var minNums1 = int.Parse(minNums[0]);
            if(clientNums1 < minNums1)
            {
                return false;
            }
            else if(clientNums1 == minNums1)
            {
                if(int.Parse(clientNums[1]) < int.Parse(minNums[1]))
                {
                    return false;
                }
            }
            return true;
        }

        /// <summary>
        /// 低于推荐版本则提示更新
        /// </summary>
        public bool IsClientBiggerThanLatestVersion(string latestVersion, string clientVersion)
        {
            if (string.IsNullOrEmpty(latestVersion) || string.IsNullOrEmpty(clientVersion))
            {
                return true;
            }
            var latestNums = latestVersion.Split('.');
            var clientNums = clientVersion.Split('.');
            if (latestNums.Length < 3 || clientNums.Length < 3)
            {
                return true;
            }
            var clientNums1 = int.Parse(clientNums[0]);
            var latestNums1 = int.Parse(latestNums[0]);
            if (clientNums1 < latestNums1)
            {
                return false;
            }
            else if (clientNums1 == latestNums1)
            {
                if (int.Parse(clientNums[1]) < int.Parse(latestNums[1]))
                {
                    return false;
                }
            }
            return true;
        }

        protected string GetFileMD5(string filePath)
        {
            return GameLaunchUtils.GetFileMD5(filePath);
        }

        protected string GetFileMD5(byte[] content)
        {
            return GameLaunchUtils.GetFileMD5(content);
        }

        protected void GetBytesAsync(string path, Action<byte[]> onComplete)
        {
            byte[] result;
#if UNITY_EDITOR || UNITY_IOS
            result = File.ReadAllBytes(path);
            onComplete(result);
#elif UNITY_ANDROID
            BFMain.Instance.WebRequestMgr.Get(path, (EDownloadCode code, UnityEngine.Networking.UnityWebRequest request) => {
                if (code == EDownloadCode.SUCCESS)
                {
                    result = request.downloadHandler.data;
                    onComplete(result);
                }
                else
                {
                    onComplete(null);
                    Debug.LogWarning("GetBytesAsync Failed " + request.responseCode);
                }
            });
#endif
        }

        protected void QuitGame()
        {
            Application.Quit();
        }
    }
}