// Admin.NET 项目的版权、商标、专利和其他相关权利均受相应法律法规的保护。使用本项目应遵守相关法律法规和许可证的要求。
//
// 本项目主要遵循 MIT 许可证和 Apache 许可证（版本 2.0）进行分发和使用。许可证位于源代码树根目录中的 LICENSE-MIT 和 LICENSE-APACHE 文件。
//
// 不得利用本项目从事危害国家安全、扰乱社会秩序、侵犯他人合法权益等法律法规禁止的活动！任何基于本项目二次开发而产生的一切法律纠纷和责任，我们不承担任何责任！

namespace Admin.NET.Core.Service;

/// <summary>
/// 系统用户角色服务
/// </summary>
public class SysUserRoleService : ITransient
{
    private readonly UserManager _userManager;
    private readonly SysCacheService _sysCacheService;
    private readonly SqlSugarRepository<SysUserRole> _sysUserRoleRep;

    public SysUserRoleService(UserManager userManager,
        SysCacheService sysCacheService,
        SqlSugarRepository<SysUserRole> sysUserRoleRep)
    {
        _userManager = userManager;
        _sysCacheService = sysCacheService;
        _sysUserRoleRep = sysUserRoleRep;
    }

    /// <summary>
    /// 授权用户角色
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    public async Task GrantUserRole(UserRoleInput input)
    {
        var targetTenantId = await _sysUserRoleRep.Context.Queryable<SysUser>()
            .ClearFilter()
            .Where(u => u.Id == input.UserId)
            .Select(u => u.TenantId)
            .FirstAsync();
        if (targetTenantId is null or <= 0)
            throw Oops.Oh(ErrorCodeEnum.D1016);

        // 有 JWT 时只允许操作当前租户；匿名注册链则以刚创建用户的租户为可信边界。
        if (_userManager.TenantId > 0 &&
            targetTenantId != _userManager.TenantId &&
            !_userManager.SuperAdmin)
            throw Oops.Oh(ErrorCodeEnum.D1016);

        var requestedRoleIds = (input.RoleIdList ?? new List<long>()).Distinct().ToList();
        if (requestedRoleIds.Count > 0)
        {
            var allowedRoleIds = await _sysUserRoleRep.Context.Queryable<SysRole>()
                .ClearFilter()
                .Where(u => u.TenantId == targetTenantId && requestedRoleIds.Contains(u.Id))
                .Select(u => u.Id)
                .ToListAsync();
            if (allowedRoleIds.Count != requestedRoleIds.Count)
                throw Oops.Oh(ErrorCodeEnum.D1016);
        }

        await _sysUserRoleRep.DeleteAsync(u => u.UserId == input.UserId);

        if (requestedRoleIds.Count < 1)
        {
            DeleteUserButtonCache(input.UserId);
            return;
        }

        var roles = requestedRoleIds.Select(u => new SysUserRole
        {
            UserId = input.UserId,
            RoleId = u
        }).ToList();
        await _sysUserRoleRep.InsertRangeAsync(roles);
        DeleteUserButtonCache(input.UserId);
    }

    /// <summary>
    /// 根据角色Id删除用户角色
    /// </summary>
    /// <param name="roleId"></param>
    /// <returns></returns>
    public async Task DeleteUserRoleByRoleId(long roleId)
    {
        await _sysUserRoleRep.AsQueryable()
             .Where(u => u.RoleId == roleId)
             .Select(u => u.UserId)
             .ForEachAsync(userId =>
             {
                 DeleteUserButtonCache(userId);
             });

        await _sysUserRoleRep.DeleteAsync(u => u.RoleId == roleId);
    }

    /// <summary>
    /// 根据用户Id删除用户角色
    /// </summary>
    /// <param name="userId"></param>
    /// <returns></returns>
    public async Task DeleteUserRoleByUserId(long userId)
    {
        await _sysUserRoleRep.DeleteAsync(u => u.UserId == userId);
        DeleteUserButtonCache(userId);
    }

    /// <summary>
    /// 根据用户Id获取角色集合
    /// </summary>
    /// <param name="userId"></param>
    /// <returns></returns>
    public async Task<List<SysRole>> GetUserRoleList(long userId)
    {
        var tenantId = _userManager.TenantId;
        if (tenantId <= 0) return new();

        return await _sysUserRoleRep.AsQueryable()
            .InnerJoin<SysRole>((userRole, role) => userRole.RoleId == role.Id)
            .Where((userRole, role) => userRole.UserId == userId && role.TenantId == tenantId)
            .Select((userRole, role) => role)
            .ToListAsync();
    }

    /// <summary>
    /// 根据用户Id获取角色Id集合
    /// </summary>
    /// <param name="userId"></param>
    /// <returns></returns>
    public async Task<List<long>> GetUserRoleIdList(long userId)
    {
        var tenantId = _userManager.TenantId;
        if (tenantId <= 0) return new();

        return await _sysUserRoleRep.AsQueryable()
            .InnerJoin<SysRole>((userRole, role) => userRole.RoleId == role.Id)
            .Where((userRole, role) => userRole.UserId == userId && role.TenantId == tenantId)
            .Select((userRole, role) => userRole.RoleId)
            .ToListAsync();
    }

    /// <summary>
    /// 根据角色Id获取用户Id集合
    /// </summary>
    /// <param name="roleId"></param>
    /// <returns></returns>
    public async Task<List<long>> GetUserIdList(long roleId)
    {
        return await _sysUserRoleRep.AsQueryable()
            .Where(u => u.RoleId == roleId).Select(u => u.UserId).ToListAsync();
    }

    private void DeleteUserButtonCache(long userId)
    {
        _sysCacheService.RemoveByPrefixKey($"{CacheConst.KeyUserButton}{userId}:");
        // 兼容清理升级前不含租户维度的旧 key。
        _sysCacheService.Remove($"{CacheConst.KeyUserButton}{userId}");
    }
}