const API = require("../../lib/API");
const db = require("../../plugin/DataBase/db");
const AccessControl = require("../../lib/AccessControl");
const { BaseStdResponse } = require("../../BaseStdResponse");

class IndexData extends API {
    constructor() {
        super();

        this.setPath('/Admin/IndexData')
        this.setMethod('GET')
    }

    async onRequest(req, res) {
        let { uuid, session } = req.query

        if ([uuid, session].some(value => value === '' || value === null || value === undefined)) {
            return res.json({
                ...BaseStdResponse.MISSING_PARAMETER,
                endpoint: 1513126
            })
        }

        // 检查 session
        if (!await AccessControl.checkSession(uuid, session))
            return res.status(401).json({
                ...BaseStdResponse.ACCESS_DENIED
            })

        let sql = `
                    SELECT
                        (SELECT COUNT(*) FROM article) AS article_count,
                        (SELECT COUNT(*) FROM users) AS users_count,
                        (SELECT SUM(views) FROM article) AS article_views
                `

        try {
            let r = await db.query(sql)
            if (!r) {
                return res.json({
                    ...BaseStdResponse.DATABASE_ERR
                })
            }

            let { article_count, users_count, article_views } = r[0]

            res.json({
                ...BaseStdResponse.OK,
                data: {
                    article_count,
                    users_count,
                    article_views
                }
            })

        } catch (err) {
            return res.json({
                ...BaseStdResponse.ERR
            })
        }
    }
}

module.exports.IndexData = IndexData;