using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using OfficeOpenXml.FormulaParsing.Excel.Functions.Math;
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using WIDESEA_Core.BaseRepository;
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using WIDESEA_Core.BaseServices;
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using WIDESEA_DTO.BasicInfo;
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using WIDESEA_IBasicInfoServices;
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using WIDESEA_Model.Models;
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namespace WIDESEA_BasicInfoServices
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{
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public class ActivationCodeService : ServiceBase<Dt_ActivationCode, IRepository<Dt_ActivationCode>>, IActivationCodeService
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{
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private readonly IRepository<Dt_CharMapping> _charMappingRepository;
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private readonly IRepository<Dt_RuntimeCode> _runtimeCodeRepository;
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private readonly IRepository<Dt_Products> _productRepository;
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public ActivationCodeService(IRepository<Dt_ActivationCode> BaseDal, IRepository<Dt_CharMapping> charMappingRepository, IRepository<Dt_RuntimeCode> runtimeCodeRepository, IRepository<Dt_Products> productRepository) : base(BaseDal)
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{
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_charMappingRepository = charMappingRepository;
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_runtimeCodeRepository = runtimeCodeRepository;
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_productRepository = productRepository;
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}
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/// <summary>
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/// 生成激活码
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/// </summary>
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/// <param name="activationDTO">包含运行码、设备ID和产品名称的数据传输对象</param>
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/// <returns>生成的激活码</returns>
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public string GenerateActivationCode(ActivationCodeDTO activationDTO)
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{
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// 查询运行码对应的模型
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Dt_RuntimeCode runtimeCodeModel = _runtimeCodeRepository.QueryFirst(x => x.RuntimeCode == activationDTO.RuntimeCode);
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// 1. 检查运行码是否已存在
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if (runtimeCodeModel == null)
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{
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throw new InvalidOperationException($"无效的运行码: {activationDTO.RuntimeCode}");
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}
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// 查询激活码对应的模型
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Dt_ActivationCode activationCodeModel = BaseDal.QueryFirst(x => x.RuntimeCode == activationDTO.RuntimeCode);
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// 2. 检查激活码是否已存在
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if (activationCodeModel != null)
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{
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return activationCodeModel.ActivationCode;
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}
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int productId = -1;
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// 查询产品对应的模型
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Dt_Products product = _productRepository.QueryFirst(x => x.ProductName == activationDTO.ProductName);
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if (product != null)
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{
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productId = product.Id;
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}
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// 3. 检查设备ID和产品ID是否匹配
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if (runtimeCodeModel.DeviceId != activationDTO.DeviceId || runtimeCodeModel.ProductId != productId)
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{
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throw new InvalidOperationException($"设备ID或产品ID不匹配: {activationDTO.DeviceId}, {productId}");
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}
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// 4. 生成激活码
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// 去除运行码中的"-"字符
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string baseRandom = activationDTO.RuntimeCode.Replace("-", string.Empty);
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// 查询字符映射字典
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Dictionary<char, (char output, int shift)> mappingDict = _charMappingRepository.QueryData().ToDictionary(x => x.InputChar.ToCharArray().FirstOrDefault(), x => (x.OutputChar.ToCharArray().FirstOrDefault(), x.ShiftFactor));
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char[] result = new char[baseRandom.Length];
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int length = baseRandom.Length;
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// 遍历运行码的每个字符进行转换
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for (int i = 0; i < length; i++)
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{
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char current = baseRandom[i];
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if (current == '-')
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continue;
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if (!mappingDict.TryGetValue(current, out var mapping))
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throw new InvalidOperationException($"无效字符: {current}");
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// 特殊变换：每5个字符增加复杂度
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char mappedChar = (i % 5 == 4)
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? ApplySpecialTransform(mapping.output, mapping.shift)
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: mapping.output;
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result[i] = mappedChar;
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}
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// 格式化激活码
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string activationCode = FormatCode(new string(result));
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// 5. 存储激活码
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StoredActivationCode(activationDTO.DeviceId, baseRandom, activationCode, activationDTO.RuntimeCode, productId);
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return activationCode;
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}
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/// <summary>
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/// 对输入字符进行基于ASCII码的二次变换。
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/// </summary>
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/// <param name="c">要变换的字符。</param>
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/// <param name="position">字符的位置，用于计算变换值。</param>
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/// <returns>变换后的字符。</returns>
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private char ApplySpecialTransform(char c, int position)
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{
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// 将字符转换为ASCII码
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int ascii = (int)c;
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// 计算变换后的ASCII码值，基于字符的位置进行偏移，并确保结果在0-35范围内
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int transformed = (ascii + position) % 36 + 48;
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// 如果变换后的ASCII码值在':'到'@'之间（即字符'9'到字符'@'），则再偏移7个位置
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if (transformed >= ':' && transformed <= '@')
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{
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transformed += 7;
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}
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// 将变换后的ASCII码值转换回字符并返回
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return (char)transformed;
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}
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/// <summary>
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/// 将原始字符串格式化为XXXXX-XXXXX-XXXXX-XXXXX-XXXXX的形式
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/// </summary>
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/// <param name="raw">需要格式化的原始字符串，长度必须为25个字符</param>
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private string FormatCode(string raw)
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{
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// 格式化为XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
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return string.Join("-",
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raw.Substring(0, 5),
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raw.Substring(5, 5),
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raw.Substring(10, 5),
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raw.Substring(15, 5),
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raw.Substring(20, 5));
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}
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/// <summary>
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/// 存储激活码信息到数据库
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/// </summary>
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/// <param name="deviceId">设备ID，用于标识特定设备</param>
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/// <param name="baseRandom">基础随机码，用于生成激活码的随机字符串</param>
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/// <param name="activationCode">激活码，用于产品激活的唯一代码</param>
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/// <param name="runtimeCode">运行时码，用于验证激活状态的代码</param>
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/// <param name="productId">产品ID，用于标识不同的产品</param>
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private void StoredActivationCode(string deviceId, string baseRandom, string activationCode, string runtimeCode, int productId)
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{
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Dt_ActivationCode activationRecord = new Dt_ActivationCode
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{
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MappedRandom = baseRandom,
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ActivationCode = activationCode,
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DeviceId = deviceId,
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IsUsed = false,
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ProductId = productId,
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ExpiresTime = null,
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RuntimeCode = runtimeCode
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};
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BaseDal.AddData(activationRecord);
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}
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}
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}
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