import { Document, Types, Model, Schema, model, DocumentQuery } from 'mongoose';

interface IListDocument extends Document {
  name: string;
  userId: Types.ObjectId;
  sharedOwnerIds: Array<Types.ObjectId>;
  date: Date;
  notes: string;
  items: Array<{
    name: string;
    hasBeenbought: boolean;
    category: Types.ObjectId;
    order: number;
  }>;
}

interface IListQueryHelpers {
  byUserWithAccess: (
    userId: Types.ObjectId
  ) => DocumentQuery<IListDocument, IListDocument, IListQueryHelpers>;
}

interface IListModel extends Model<IListDocument, IListQueryHelpers> {
  findByUserWithAccess: (userId: Types.ObjectId) => Promise<IListDocument[]>;
}

// item subdoc
const itemSchema = new Schema({
  name: String,
  hasBeenBought: { type: Boolean, default: false },
  category: Schema.Types.ObjectId,
  order: Number
});

// schema
const listSchema = new Schema({
  name: String,
  userId: Schema.Types.ObjectId,
  sharedOwnerIds: [Schema.Types.ObjectId],
  date: Date,
  notes: { type: String, default: '' },
  items: [itemSchema]
});

// query helpers
listSchema.query.byUserWithAccess = function(userId: Types.ObjectId) {
  return this.or([
    { userId },
    { sharedOwnerIds: { $elemMatch: { $eq: userId } } }
  ]);
};

// static helpers
listSchema.statics.findByUserWithAccess = function(userId: Types.ObjectId) {
  return this.find()
    .byUserWithAccess(userId)
    .exec();
};

// model
export const List = model<IListDocument, IListModel>(
  'List',
  listSchema,
  'lists'
);