using FreeSql;
using MAX.Core.DependencyInjection;
using Store.Users.Entities;
namespace Store.Users.Repositories;

public interface IUserRepository : IBaseRepository<UserEntity>
{
    /// <summary>获取用户及从主账号继承的有效配置；用户不存在时返回空。</summary>
    Task<UserEntity?> GetUser(string userName);

    /// <summary>获取用户所属主账号（主账号返回自身）；用户不存在时返回空，主账号无效时抛出业务异常。</summary>
    Task<UserEntity?> GetMainUser(string userName);
}

/// <summary>集中处理旧系统主子账号的有效计费配置和积分权限继承。</summary>
internal class UserRepository(IFreeSql freeSql) : BaseRepository<UserEntity>(freeSql), IUserRepository, ITransientDependency
{
    /// <inheritdoc />
    public async Task<UserEntity?> GetUser(string userName)
    {
        var user = await Where(u => u.UserName == userName).FirstAsync();
        if (user == null || user.IsMainUser) return user;
        var parent = await GetMainUser(user);
        user.OemId = parent.OemId;
        // 子账号的计费配置完全跟随主账号，包括未配置的费用。
        user.ShopPointsPerMonth = parent.ShopPointsPerMonth;
        user.PostagePerOrder = parent.PostagePerOrder;
        user.RefundPostagePerOrder = parent.RefundPostagePerOrder;
        user.GiftOemAmountPerOrder = parent.GiftOemAmountPerOrder;
        user.SyncLogisticsPerOrder = parent.SyncLogisticsPerOrder;
        var authority = (user.Authority ?? "").Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries).ToHashSet();
        var parentAuthority = (parent.Authority ?? "").Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
        if (parentAuthority.Contains("积分用户")) authority.Add("积分用户"); else authority.Remove("积分用户");
        user.Authority = string.Join(",", authority);
        return user;
    }
    /// <inheritdoc />
    public async Task<UserEntity?> GetMainUser(string userName)
    {
        var user = await Where(u => u.UserName == userName).FirstAsync();
        return user == null ? null : await GetMainUser(user);
    }

    /// <summary>统一校验主子账号关系，禁止从其他子账号继承配置。</summary>
    private async Task<UserEntity> GetMainUser(UserEntity user)
    {
        if (user.IsMainUser) return user;
        var parent = await Where(u => u.UserName == user.ParentUserName).FirstAsync();
        if (parent == null || !parent.IsMainUser)
            throw new MAX.Framework.Commons.AppException("主账号不存在或账号关系无效，请联系管理员");
        return parent;
    }
}