import db from '../db.js';
import customError from '../response/customError.js';
import responseCodes from '../response/responseCodes.js';
import errorHandler from '../utils/pgerrorhandler.js';

class GroupService {
    async create(name, creatorId) {
        let res = await db.query("INSERT INTO groups (name, admin_id) VALUES ($1, $2) RETURNING ID", [name, creatorId]).catch((e) => errorHandler(e, "groups"));

        return res.rows[0];
    }

    async getById(id) {
        let res = (await db.query("SELECT * FROM groups WHERE id = $1", [id]));
        if (res.rowCount == 0) throw new customError(`getById group not found`, responseCodes.responses.groups.id_not_found);
        return res.rows[0];
    }

    async getAdminId(id) {
        return (await db.query("SELECT admin_id FROM groups WHERE ID = $1", [id])).rows[0].admin_id;
    }

    async updatePassword(id, password) {
        return (await db.query("UPDATE groups SET password = $1 WHERE id = $2", [password, id]));
    }

    async getPassword(id) {
        return (await db.query("SELECT password FROM groups WHERE id = $1", [id])).rows[0].password;
    }

    async getByName(name) {
        let res = (await db.query("SELECT id FROM groups WHERE name = $1", [name]));
        if (res.rowCount == 0) throw new customError(`getByName group not found`, responseCodes.responses.groups.name_not_found);
        return res.rows[0];
    }

    async getUsersInGroup(groupId) {
        return (await db.query("SELECT id FROM users WHERE $1 = ANY(groups)", [groupId])).rows.map((group) => group.id)
    }

    async rename(groupId, newName) {
        await db.query("UPDATE groups SET name = $1 WHERE id = $2", [newName, groupId]).catch((e) => errorHandler(e, "groups"));;
    }

    async transferOwnership(groupId, userId) {
        await db.query("UPDATE groups SET admin_id = $1 WHERE id = $2", [userId, groupId])
    }
};

export default new GroupService();