using Rhea.Common;
using Rhea.Common.Authorization;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tiger.IBusiness;

namespace Tiger.Business
{
    /// <summary>
    /// Tiger 项目激活类，包括以下文件：
    /// <br/>"项目名.cer"(Certification)：包含有公钥的数字证书，以Xml格式存储
    /// <br/>"项目名.act"(ActivationCode)：包含有激活码字符的文档
    ///  <br/>"项目名.req"(RequestCode)：包含有请求码字符的文档
    /// </summary>
    public class TigerActive : Activation, ITigerActive
    {
        /// <summary>
        /// 使用激活码激活程序
        /// </summary>
        /// <param name="activationCode">激活码</param>
        /// <returns></returns>
        public override Result Active(string activationCode)
        {
            Result result = new(Result.Flags.Success, "软件激活成功！");
            try
            {
                License license = DecryptLicense(activationCode, GetCertification());
                if (license.IsNullOrEmpty())
                {
                    result.Flag = Result.Flags.Failed;
                    result.Message = $"激活失败，验证码解析出错。";
                }
                else
                {
                    //项目名 ProjectName
                    if (license.ProjectName != BizContext.CurrentProject)
                    {
                        result.Flag = Result.Flags.Failed;
                        result.Message = $"激活失败，验证码不适用于本项目。";
                    }
                    //机器码 MachineCode
                    if (license.MachineCode != BizContext.MachineCode)
                    {
                        result.Flag = Result.Flags.Failed;
                        result.Message = $"激活失败，验证码不适用于本软件。";
                    }
                    //有效期截至日期 ExpiryDate
                    if ((license.ExpiryDate.Date - DateTime.Now.Date).TotalMilliseconds < 0)
                    {
                        result.Flag = Result.Flags.Warning;
                        result.Message = $"激活失败，验证码已过期。";
                    }
                }
                if (!result.IsFailed)
                {
                    //保存激活码到注册表
                    SetActivationCode(activationCode);
                }

                if (result.IsSuccessed)
                {
                    Verify();
                }
            }
            catch (System.UnauthorizedAccessException ex)
            {
                result.CatchExceptionWithLog(ex, $"权限不足，请使用管理员运行后再激活");
            }
            catch (System.Exception ex)
            {
                result.CatchExceptionWithLog(ex, $"软件激活异常");
            }
            return result;
        }

        /// <summary>
        /// 验证当前程序是否已激活
        /// </summary>
        /// <returns></returns>
        public override Result Verify()
        {
            Result result = new(Result.Flags.Success, "授权验证通过！");
            try
            {
                var license = GetCurLicense();
                if (license.IsNullOrEmpty())
                {
                    result.Flag = Result.Flags.Failed;
                    result.Message = $"授权验证失败，未找到许可信息。";
                }
                else
                {
                    //项目名 ProjectName
                    if (!license.ProjectName.IsNullOrEmpty() && license.ProjectName != BizContext.CurrentProject)
                    {
                        result.Flag = Result.Flags.Failed;
                        result.Message = $"授权验证失败，项目未授权";
                    }
                    //机器码 MachineCode
                    if (!license.MachineCode.IsNullOrEmpty() && license.MachineCode != BizContext.MachineCode)
                    {
                        result.Flag = Result.Flags.Failed;
                        result.Message = $"授权验证失败，电脑未授权。";
                    }
                    //有效期截至日期 ExpiryDate
                    if (license.ExpiryDate != DateTime.MaxValue && (license.ExpiryDate.Date - DateTime.Now.Date).TotalMilliseconds < 0)
                    {
                        result.Flag = Result.Flags.Failed;
                        result.Message = $"授权验证失败，授权已过期。";
                    }
                    //工站字典，key：工站ID，value：允许同时开启的数量 StationDict
                    if (!license.StationDict.IsNullOrEmpty())
                    {

                    }
                    //试用期截至日期 TrialExpiryDate
                    if (!result.IsSuccessed && (license.TrialExpiryDate - DateTime.Now).TotalMilliseconds > 0)
                    {
                        result.Flag = Result.Flags.Success;
                        result.Message = $"授权验证通过，在试用期内。";
                    }
                }
            }
            catch (System.Exception ex)
            {
                result.CatchExceptionWithLog(ex, $"授权验证异常");
            }
            return result;
        }

        /// <summary>
        /// 在注册表HKEY_LOCAL_MACHINE\SOFTWARE\TigerClouds节点中读取密钥证书
        /// </summary>
        /// <returns></returns>
        public string GetCertification()
        {
            Base.Regedit tc = new Base.Regedit(Base.Regedit.BaseKeys.LocalMachine, @"SOFTWARE\TigerClouds");
            return tc.Read("Certification");
        }

        /// <summary>
        /// 在注册表HKEY_LOCAL_MACHINE\SOFTWARE\TigerClouds节点中写入密钥证书
        /// </summary>
        /// <param name="key">公钥</param>
        public void SetCertification(string key)
        {
            Base.Regedit tc = new Base.Regedit(Base.Regedit.BaseKeys.LocalMachine, @"SOFTWARE\TigerClouds");
            tc.Write("Certification", key);
        }

        /// <summary>
        /// 在注册表HKEY_LOCAL_MACHINE\SOFTWARE\TigerClouds节点中读取激活码
        /// </summary>
        /// <returns></returns>
        public string GetActivationCode()
        {
            Base.Regedit tc = new Base.Regedit(Base.Regedit.BaseKeys.LocalMachine, @"SOFTWARE\TigerClouds");
            return tc.Read("ActivationCode");
        }

        /// <summary>
        /// 在注册表HKEY_LOCAL_MACHINE\SOFTWARE\TigerClouds节点中写入激活码
        /// </summary>
        /// <param name="code">激活码</param>
        public void SetActivationCode(string code)
        {
            Base.Regedit tc = new Base.Regedit(Base.Regedit.BaseKeys.LocalMachine, @"SOFTWARE\TigerClouds");
            tc.Write("ActivationCode", code);
        }

        /// <summary>
        /// 获取当前许可信息
        /// </summary>
        /// <returns></returns>
        public License GetCurLicense()
        {
            return DecryptLicense(GetActivationCode(), GetCertification());
        }

    }
}