using FreeSql.DataAnnotations;
using F9WebAiTest.Domain.Enums.SYS.Departments;
using F9WebAiTest.Domain.Events.SYS.Departments;

namespace F9WebAiTest.Domain.Entities.SYS.Departments;

/// <summary>
/// 部门：用户与部门是独立聚合，仅保存 DepartmentId 关联（避免双向强耦合）。
/// 部门用户列表仅用于查询展示，通过读模型实现。
/// </summary>
[Table(Name = "sys_departments")]
public class Department : AggregateRoot
{
    [Column(Name = "code")]
    public string Code { get; private set; }

    [Column(Name = "name")]
    public string Name { get; private set; }

    [Column(Name = "parent_id")]
    public long ParentId { get; private set; }

    [Column(Name = "manage_type")]
    public Department_ManageType_Enum ManageType { get; private set; }

    [Column(Name = "duty_type")]
    public Department_DutyType_Enum DutyType { get; private set; }

    [Column(Name = "description")]
    public string? Description { get; private set; }

    [Column(Name = "is_active")]
    public bool IsActive { get; private set; }

    [Column(Name = "sort_order")]
    public int SortOrder { get; private set; }

    private readonly List<long> _userIds = [];
    public IReadOnlyCollection<long> UserIds => _userIds.AsReadOnly();

    public Department() { }

    public Department(long id, string code, string name, long parentId,
        Department_ManageType_Enum manageType, Department_DutyType_Enum dutyType, int sortOrder, string? description = null)
    {
        Id = id;
        Code = code;
        Name = name;
        ParentId = parentId;
        ManageType = manageType;
        DutyType = dutyType;
        SortOrder = sortOrder;
        Description = description;
        IsActive = true;
        AddDomainEvent(new Department_ChangedDomainEvent(Id));
    }

    public void AddUser(long userId)
    {
        if (!_userIds.Contains(userId))
            _userIds.Add(userId);
    }

    public void RemoveUser(long userId) => _userIds.Remove(userId);

    public void Activate()
    {
        IsActive = true;
        AddDomainEvent(new Department_ChangedDomainEvent(Id));
    }

    public void Deactivate()
    {
        IsActive = false;
        AddDomainEvent(new Department_ChangedDomainEvent(Id));
    }

    public void Deleted() => AddDomainEvent(new Department_ChangedDomainEvent(Id));
}