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

namespace Domain.Entities.Members;

/// <summary>
/// 회원별 OAuth 토큰 저장 (Google OAuth 2.0 등)
/// YouTube API 호출 시 Access Token 사용
/// </summary>
public class MemberOAuthToken
{
    [ForeignKey(nameof(MemberID))]
    public virtual Member? Member { get; private set; }

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

    public int MemberID { get; private set; }

    public string Provider { get; private set; } = "Google";

    /// <summary>
    /// provider 측 고유 사용자 ID (카카오 id, 네이버 response.id). 로그인 시 backfill.
    /// 소셜 연결 끊기(disconnect) webhook 이 Provider + ProviderUserKey 로 연동행을 찾는다.
    /// </summary>
    public string? ProviderUserKey { get; private set; }

    public string AccessTokenEnc { get; private set; } = default!;

    public string? RefreshTokenEnc { get; private set; }

    public DateTime ExpiresAt { get; private set; }

    public string Scopes { get; private set; } = string.Empty;

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

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

    private MemberOAuthToken() { }

    public static MemberOAuthToken Create(
        int memberID,
        string provider,
        string accessTokenEnc,
        string? refreshTokenEnc,
        DateTime expiresAt,
        string scopes,
        string? providerUserKey = null
    )
    {
        return new MemberOAuthToken
        {
            MemberID = memberID,
            Provider = provider,
            ProviderUserKey = providerUserKey,
            AccessTokenEnc = accessTokenEnc,
            RefreshTokenEnc = refreshTokenEnc,
            ExpiresAt = expiresAt,
            Scopes = scopes
        };
    }

    public void UpdateTokens(string accessTokenEnc, string? refreshTokenEnc, DateTime expiresAt, string scopes, string? providerUserKey = null)
    {
        AccessTokenEnc = accessTokenEnc;
        if (refreshTokenEnc is not null)
        {
            RefreshTokenEnc = refreshTokenEnc;
        }
        if (!string.IsNullOrEmpty(providerUserKey))
        {
            ProviderUserKey = providerUserKey;
        }
        ExpiresAt = expiresAt;
        Scopes = scopes;
        UpdatedAt = DateTime.UtcNow;
    }

    public bool IsExpired => DateTime.UtcNow >= ExpiresAt;
    public bool HasRefreshToken => !string.IsNullOrEmpty(RefreshTokenEnc);
}