import { QueryResult } from "mysql2";
import { npdb } from "../lib/config";
import { getCollectionArgs } from "./types";

class CollectionModel {
  /**
   *
   * @param args Object of the arguments to fetch the collections.
   */
  protected async get(args: getCollectionArgs): Promise<QueryResult> {
    let query = `
    SELECT 
        np_collections.*,
        np_users.username AS author_name,
        np_collection_status.status AS status_name,
        np_collection_types.name AS type_name,
        np_categories.name AS category_name,
        np_categories.uri AS category_uri
    FROM 
        np_collections
    JOIN 
        np_users ON np_collections.author = np_users.id
    JOIN 
        np_collection_status ON np_collections.status = np_collection_status.id
    JOIN 
        np_collection_types ON np_collections.type = np_collection_types.id
    JOIN 
        np_categories ON np_collections.id = np_categories.collection_id;
    WHERE
        np_collection_types.name = "${args?.ctype}"
    AND
        np_collection_status.status = "${args?.status}"
    `;

    if (args?.s) {
      query += ` ( np_collections.title LIKE '%${args?.s}%' OR
          np_collections.content LIKE '%${args?.s}%' OR
          np_collections.uri LIKE '%${args?.s}%' OR
          np_users.username LIKE '%${args?.s}%' OR
          np_categories.name LIKE '%${args?.s}%'
        )`;
    }

    if (args?.by_author) {
      query += `AND np_users.id= ${args?.by_author}`;
    }

    if (args?.parent) {
      query += `AND np_collections.parent= ${args?.parent}`;
    }

    if (args?.by_category) {
      query += `AND np_categories.${args?.by_category?.key} = '${args?.by_category?.value}'`;
    }

    if (args?.id) {
      query += ` AND np_collections.id= ${args?.id}`;
    }

    query += `;`;
    const [rows] = await npdb.query(query);
    return rows;
  }
}

module.exports = { CollectionModel };