module.exports = (sequelize, DataTypes) => {
  const UserIdentity = sequelize.define("UserIdentity", {
    id: { type: DataTypes.UUID, primaryKey: true },
    user_id: { type: DataTypes.STRING, allowNull: false },
    provider: { type: DataTypes.ENUM("google", "apple"), allowNull: false },
    provider_subject: { type: DataTypes.STRING, allowNull: false },
    provider_email: DataTypes.STRING,
  }, { tableName: "user_identities", timestamps: true, indexes: [
    { unique: true, fields: ["provider", "provider_subject"] }, { fields: ["user_id"] },
  ] });
  UserIdentity.associate = (db) => UserIdentity.belongsTo(db.User, { foreignKey: "user_id", as: "user" });
  return UserIdentity;
};