using Microsoft.Extensions.Configuration;
using SqlSugar;
using System.Globalization;
using YY.Admin.Core;
using YY.Admin.Core.Services;
using YY.Admin.Core.Session;
using YY.Admin.Core.Util;

namespace YY.Admin.Services.Service.User
{
    public class SysUserService : ISysUserService, ISingletonDependency
    {
        private readonly ISqlSugarClient _dbContext;
        private readonly IConfiguration _configuration;
        private readonly IUserSyncOutbox _userSyncOutbox;

        public SysUserService(ISqlSugarClient dbContext, IConfiguration configuration, IUserSyncOutbox userSyncOutbox)
        {
            _dbContext = dbContext;
            _configuration = configuration;
            _userSyncOutbox = userSyncOutbox;
        }

        public async Task<List<SysUser>> GetUsersAsync()
        {
            await Task.CompletedTask;
            return new List<SysUser>();
        }

        // ── 查询 ──────────────────────────────────────────────────────────────

        public async Task<SqlSugarPagedList<UserOutput>> PageAsync(PageUserInput input)
        {
            var sexFilter = input.Sex.HasValue ? (int?)input.Sex.Value : null;
            var statusFilter = input.Status.HasValue ? (int?)input.Status.Value : null;

            var query = _dbContext.Queryable<JeecgSysUser>().ClearFilter()
                // 只显示未软删除的记录
                .Where(u => u.DelFlag == null || u.DelFlag == 0)
                .WhereIF(input.TenantId > 0, u => u.LoginTenantId == input.TenantId)
                .WhereIF(!string.IsNullOrWhiteSpace(input.Account), u => u.Username != null && u.Username.Contains(input.Account))
                .WhereIF(!string.IsNullOrWhiteSpace(input.RealName), u => u.Realname != null && u.Realname.Contains(input.RealName))
                .WhereIF(!string.IsNullOrWhiteSpace(input.Phone), u => u.Phone != null && u.Phone.Contains(input.Phone))
                .WhereIF(input.BeginTime.HasValue, u => u.CreateTime >= input.BeginTime)
                .WhereIF(input.EndTime.HasValue, u => u.CreateTime <= input.EndTime)
                .OrderBy(u => SqlFunc.Desc(u.CreateTime));

            if (sexFilter.HasValue)
            {
                var sexValue = sexFilter.Value;
                query = query.Where(u => u.Sex == sexValue);
            }
            if (statusFilter.HasValue)
            {
                var statusValue = statusFilter.Value;
                query = query.Where(u => u.Status == statusValue);
            }

            var pageData = await query.ToPagedListAsync(input.Page, input.PageSize);
            var mapped = pageData.Items.Select(MapToOutput).ToList();

            return new SqlSugarPagedList<UserOutput>
            {
                Page = pageData.Page,
                PageSize = pageData.PageSize,
                Items = mapped,
                Total = pageData.Total,
                TotalPages = pageData.TotalPages,
                HasNextPage = pageData.HasNextPage,
                HasPrevPage = pageData.HasPrevPage
            };
        }

        public async Task<bool> AccountExistsAsync(string account, long? excludeUserId = null)
        {
            var query = _dbContext.Queryable<JeecgSysUser>().ClearFilter()
                .Where(u => (u.DelFlag == null || u.DelFlag == 0) && u.Username == account);

            if (excludeUserId.HasValue && excludeUserId.Value != 0)
            {
                var excludeIdStr = excludeUserId.Value.ToString(CultureInfo.InvariantCulture);
                query = query.Where(u => u.Id != excludeIdStr);
            }

            return await query.AnyAsync();
        }

        // ── 新增 ──────────────────────────────────────────────────────────────

        public async Task<int> CreateAsync(SysUser sysUser)
        {
            var defaultTenantId = (int?)_configuration.GetValue<long?>("JeecgIntegration:DefaultTenantId") ?? 1002;
            var now = DateTime.Now;

            var jeecgUser = new JeecgSysUser
            {
                // 用毫秒时间戳生成本地唯一 ID（数值型字符串，与 PageAsync 的 long.TryParse 兼容）
                Id = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds().ToString(CultureInfo.InvariantCulture),
                Username = sysUser.Account,
                Realname = sysUser.RealName,
                // 本地创建账号使用 CryptogramUtil 加密，无 salt；登录时走 CryptogramUtil 路径
                Password = string.IsNullOrWhiteSpace(sysUser.Password)
                    ? string.Empty
                    : CryptogramUtil.Encrypt(sysUser.Password),
                Salt = null,
                Sex = ToJeecgSex(sysUser.Sex),
                Birthday = sysUser.Birthday,
                Phone = sysUser.Phone,
                Email = sysUser.Email,
                Status = 1,   // 默认启用
                DelFlag = 0,
                LoginTenantId = defaultTenantId,
                CreateBy = AppSession.CurrentUser?.Account,
                CreateTime = now,
                UpdateTime = now,
            };

            var affected = await _dbContext.Insertable(jeecgUser).ExecuteCommandAsync();
            if (affected > 0)
            {
                _ = _userSyncOutbox.EnqueueCreateAsync(
                    jeecgUser.Id,
                    jeecgUser.Username ?? string.Empty,
                    jeecgUser.Realname,
                    jeecgUser.Sex,
                    jeecgUser.Birthday,
                    jeecgUser.Phone,
                    jeecgUser.Email,
                    jeecgUser.Status ?? 1,
                    jeecgUser.CreateBy);
            }
            return affected;
        }

        // ── 修改 ──────────────────────────────────────────────────────────────

        public async Task<int> UpdateAsync(SysUser sysUser)
        {
            var idStr = sysUser.Id.ToString(CultureInfo.InvariantCulture);
            var now = DateTime.Now;
            var updater = AppSession.CurrentUser?.Account;
            var jeecgStatus = sysUser.Status == StatusEnum.Enable ? 1 : 2;
            var jeecgSex = ToJeecgSex(sysUser.Sex);
            var account = (sysUser.Account ?? string.Empty).Trim();

            var affected = await _dbContext.Updateable<JeecgSysUser>()
                .SetColumns(u => new JeecgSysUser
                {
                    Username = account,
                    Realname = sysUser.RealName,
                    Sex = jeecgSex,
                    Birthday = sysUser.Birthday,
                    Phone = sysUser.Phone,
                    Email = sysUser.Email,
                    Status = jeecgStatus,
                    UpdateBy = updater,
                    UpdateTime = now,
                })
                .Where(u => u.Id == idStr)
                .ExecuteCommandAsync();

            if (affected > 0)
            {
                _ = _userSyncOutbox.EnqueueUpdateAsync(idStr, account, sysUser.RealName, jeecgSex, sysUser.Birthday, sysUser.Phone, sysUser.Email, jeecgStatus, updater);
            }
            return affected;
        }

        // ── 状态切换 ──────────────────────────────────────────────────────────

        public async Task<int> ToggleStatus(SysUser sysUser)
        {
            var idStr = sysUser.Id.ToString(CultureInfo.InvariantCulture);
            // Jeecg 约定：1=正常，2=冻结
            var jeecgStatus = sysUser.Status == StatusEnum.Enable ? 1 : 2;
            var now = DateTime.Now;
            var updater = AppSession.CurrentUser?.Account;

            var affected = await _dbContext.Updateable<JeecgSysUser>()
                .SetColumns(u => new JeecgSysUser
                {
                    Status = jeecgStatus,
                    UpdateBy = updater,
                    UpdateTime = now,
                })
                .Where(u => u.Id == idStr)
                .ExecuteCommandAsync();

            if (affected > 0)
            {
                _ = _userSyncOutbox.EnqueueToggleStatusAsync(idStr, jeecgStatus, updater);
            }
            return affected;
        }

        // ── 删除 ──────────────────────────────────────────────────────────────

        public async Task<int> DeleteAsync(long id)
        {
            var idStr = id.ToString(CultureInfo.InvariantCulture);
            // 软删除：保留记录供审计，PageAsync 已过滤 del_flag=1
            var affected = await _dbContext.Updateable<JeecgSysUser>()
                .SetColumns(u => new JeecgSysUser { DelFlag = 1 })
                .Where(u => u.Id == idStr)
                .ExecuteCommandAsync();

            if (affected > 0)
            {
                _ = _userSyncOutbox.EnqueueDeleteAsync(idStr);
            }
            return affected;
        }

        public async Task<int> BatchDeleteAsync(List<long> ids)
        {
            if (ids == null || ids.Count == 0)
            {
                return 0;
            }
            var idStrings = ids.Select(i => i.ToString(CultureInfo.InvariantCulture)).ToList();
            var affected = await _dbContext.Updateable<JeecgSysUser>()
                .SetColumns(u => new JeecgSysUser { DelFlag = 1 })
                .Where(u => idStrings.Contains(u.Id))
                .ExecuteCommandAsync();

            if (affected > 0)
            {
                _ = _userSyncOutbox.EnqueueBatchDeleteAsync(idStrings);
            }
            return affected;
        }

        // ── 辅助 ──────────────────────────────────────────────────────────────

        public async Task<long> ReadMaxIdAsync()
        {
            // jeecg_sys_user 使用字符串ID，此方法不再适用；保留签名兼容旧调用
            await Task.CompletedTask;
            return DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
        }

        private static UserOutput MapToOutput(JeecgSysUser u)
        {
            long.TryParse(u.Id, NumberStyles.Integer, CultureInfo.InvariantCulture, out var id);
            var sex = u.Sex == 1 ? GenderEnum.Male : u.Sex == 2 ? GenderEnum.Female : GenderEnum.Unknown;
            var status = u.Status == 1 ? StatusEnum.Enable : StatusEnum.Disable;
            return new UserOutput
            {
                Id = id,
                Account = u.Username ?? string.Empty,
                RealName = u.Realname ?? string.Empty,
                NickName = string.IsNullOrWhiteSpace(u.Realname) ? (u.Username ?? string.Empty) : u.Realname,
                Avatar = u.Avatar,
                Sex = sex,
                Birthday = u.Birthday,
                Phone = u.Phone,
                Email = u.Email,
                OfficePhone = u.Telephone,
                Status = status,
                CreateTime = u.CreateTime,
                OrgName = u.OrgCode ?? string.Empty,
                PosName = u.PositionType ?? string.Empty,
                RoleName = string.Empty,
                AccountType = AccountTypeEnum.NormalUser
            };
        }

        private static int? ToJeecgSex(GenderEnum? sex) => sex switch
        {
            GenderEnum.Male => 1,
            GenderEnum.Female => 2,
            _ => null
        };
    }
}