using System.Text.RegularExpressions;
using Fengling.Member.Domain.Events.Member;
using NetCorePal.Extensions.Domain;

namespace Fengling.Member.Domain.Aggregates.Users;

public partial record MemberId : IGuidStronglyTypedId
{
    public static MemberId New() => new MemberId(Guid.NewGuid());
    
    public Guid Value => this;
    
    public static implicit operator Guid(MemberId id) => id.Value;
    public static implicit operator MemberId(Guid value) => new MemberId(value);
}

public class MemberEntity : Entity<MemberId>, IAggregateRoot
{
    public long TenantId { get; private set; }
    public string? PhoneNumber { get; private set; }
    public string? OpenId { get; private set; }
    public string? UnionId { get; private set; }
    public MemberStatus Status { get; private set; } = MemberStatus.Active;
    public DateTime CreatedAt { get; private set; } = DateTime.UtcNow;
    public DateTime? UpdatedAt { get; private set; }
    public int Version { get; private set; } = 1;
    public Deleted Deleted { get; private set; } = new();
    public RowVersion RowVersion { get; private set; } = new(0);

    private readonly List<MemberTag> _tags = new();
    public IReadOnlyCollection<MemberTag> Tags => _tags.AsReadOnly();

    private readonly List<OAuthAuthorization> _oauthAuthorizations = new();
    public IReadOnlyCollection<OAuthAuthorization> OAuthAuthorizations => _oauthAuthorizations.AsReadOnly();

    private MemberEntity()
    {
    }

    public static MemberEntity Create(long tenantId, string? phoneNumber = null)
    {
        if (tenantId <= 0)
            throw new ArgumentException("租户ID必须大于0", nameof(tenantId));

        var member = new MemberEntity
        {
            TenantId = tenantId,
            PhoneNumber = phoneNumber,
            Status = MemberStatus.Active,
            CreatedAt = DateTime.UtcNow
        };

        member.AddDomainEvent(new MemberRegisteredEvent(member.Id, member.TenantId, phoneNumber, member.CreatedAt));
        return member;
    }

    public void BindPhoneNumber(string phoneNumber)
    {
        if (string.IsNullOrWhiteSpace(phoneNumber))
            throw new ArgumentException("手机号不能为空", nameof(phoneNumber));

        if (!Regex.IsMatch(phoneNumber, @"^1[3-9]\d{9}$"))
            throw new ArgumentException("手机号格式不正确", nameof(phoneNumber));

        PhoneNumber = phoneNumber;
        UpdatedAt = DateTime.UtcNow;
    }

    public void BindOAuth(OAuthProvider provider, string openId, string? unionId = null)
    {
        if (string.IsNullOrWhiteSpace(openId))
            throw new ArgumentException("OpenId不能为空", nameof(openId));

        UpdatePrimaryOAuthId(provider, openId, unionId);
        UpdatedAt = DateTime.UtcNow;

        var authorization = _oauthAuthorizations.FirstOrDefault(x => x.Provider == provider && x.OpenId == openId);
        if (authorization == null)
        {
            authorization = OAuthAuthorization.Create(Id, provider, openId, unionId);
            _oauthAuthorizations.Add(authorization);
        }
        else
        {
            authorization.UpdateUnionId(unionId);
        }
    }

    public void BindWechat(string openId, string? unionId = null)
    {
        BindOAuth(OAuthProvider.Wechat, openId, unionId);
    }

    private void UpdatePrimaryOAuthId(OAuthProvider provider, string openId, string? unionId)
    {
        if (provider == OAuthProvider.Wechat)
        {
            OpenId = openId;
            UnionId = unionId ?? UnionId;
        }
    }

    public OAuthAuthorization? GetOAuthAuthorization(OAuthProvider provider)
    {
        return _oauthAuthorizations.FirstOrDefault(x => x.Provider == provider);
    }

    public bool HasOAuthBound(OAuthProvider provider, string openId)
    {
        return _oauthAuthorizations.Any(x => x.Provider == provider && x.OpenId == openId);
    }

    public void RecordOAuthLogin(OAuthProvider provider, string openId)
    {
        var authorization = _oauthAuthorizations.FirstOrDefault(x => x.Provider == provider && x.OpenId == openId);
        authorization?.RecordLogin();
    }

    public void AddTag(string tagId, string? tagName = null)
    {
        var existingTag = _tags.FirstOrDefault(t => t.TagId == tagId);
        if (existingTag != null)
            return;

        _tags.Add(MemberTag.Create(Id, tagId, tagName));
    }

    public void RemoveTag(string tagId)
    {
        var tag = _tags.FirstOrDefault(t => t.TagId == tagId);
        if (tag != null)
            _tags.Remove(tag);
    }

    public void Freeze()
    {
        if (Status == MemberStatus.Frozen)
            return;

        Status = MemberStatus.Frozen;
        UpdatedAt = DateTime.UtcNow;
    }

    public void Unfreeze()
    {
        Status = MemberStatus.Active;
        UpdatedAt = DateTime.UtcNow;
    }

    public void Deactivate()
    {
        if (Status == MemberStatus.Inactive)
            return;

        Status = MemberStatus.Inactive;
        UpdatedAt = DateTime.UtcNow;
    }
}