using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace Domain.Entities.Members;

/// <summary>
/// 회원 팔로우 관계 (Follower → Followee)
/// </summary>
public sealed class MemberFollow
{
    [ForeignKey(nameof(FollowerMemberID))]
    public Member Follower { get; private set; } = null!;

    [ForeignKey(nameof(FolloweeMemberID))]
    public Member Followee { get; private set; } = null!;

    [Key]
    public int ID { get; private set; }

    public int FollowerMemberID { get; private set; }

    public int FolloweeMemberID { get; private set; }

    public bool NotifyOnPost { get; private set; } = true;

    public bool IsMuted { get; private set; } = false;

    public DateTime CreatedAt { get; private set; } = DateTime.UtcNow;

    private MemberFollow() { }

    private MemberFollow(int followerMemberID, int followeeMemberID)
    {
        if (followerMemberID <= 0)
        {
            throw new ArgumentOutOfRangeException(nameof(followerMemberID));
        }

        if (followeeMemberID <= 0)
        {
            throw new ArgumentOutOfRangeException(nameof(followeeMemberID));
        }

        if (followerMemberID == followeeMemberID)
        {
            throw new ArgumentException("자기 자신을 팔로우할 수 없습니다.", nameof(followeeMemberID));
        }

        FollowerMemberID = followerMemberID;
        FolloweeMemberID = followeeMemberID;
        CreatedAt = DateTime.UtcNow;
    }

    public static MemberFollow Create(int followerMemberID, int followeeMemberID)
    {
        return new(followerMemberID, followeeMemberID);
    }

    public void SetNotifyOnPost(bool notify)
    {
        NotifyOnPost = notify;
    }

    public void SetMuted(bool muted)
    {
        IsMuted = muted;
    }
}