// Required modules
const router = require('express').Router();
const util = require("./../utilities/utilities_main.js");
const moment = require("moment");

router.get("/", async function(req, res) {

    const is_audited = req.query.is_audited == 1;
    
    try {
        let conn;
	    try {
	    	conn = await util.getDBConnection(); // get connection from db
	    	const query = 
            `
            SELECT item_form.application_id, item_form.item_info_id, item_info.item_content,
                item_form.application_unit,
                item_form.subsidy,
                scholarship_application.application_date,
                scholarship_application.student_id,
                scholarship_application.supplement_filename,
                student.student_name,
                audit_form.committee_review,
                advisor.advisor_name,
                student.departmant_and_grade,
                assistant.assistant_name,
                audit_form.documents_ready,
                audit_form.meeting_name,
                audit_form.passed_date,
                audit_form.scholarship_amount
            FROM
                item_form
            JOIN
                scholarship_application ON item_form.application_id = scholarship_application.application_id
            LEFT JOIN
                student ON scholarship_application.student_id = student.student_id
            JOIN 
            	advisor ON student.advisor_id = advisor.advisor_id
            LEFT JOIN
                item_info ON item_form.item_info_id = item_info.item_info_id
            LEFT JOIN
            	audit_form ON item_form.application_id = audit_form.application_id
            LEFT JOIN 
            	assistant ON audit_form.assistant_username = assistant.username;
            ;
            `;
            const db_result = await conn.query(query);
            let result = [];
            for(let i=0; i<db_result.length; i++) {
                if (is_audited) {
                    if (db_result[i].committee_review != null) {
                        result.push(db_result[i]);
                    }
                } else {
                    if (db_result[i].committee_review == null) {
                        result.push(db_result[i]);
                    }
                }
            }
            
            res.json({ success: true, data: result });
	    }
	    catch(e) {
            console.error(e);
            res.json({suc : false});
	    }
	    finally {
		    util.closeDBConnection(conn); // close db connection
	    }
    }
    catch(e) {
        console.log(e);
    }
})

router.post("/", async function(req, res) {
    try {
        if (!util.is_assistant(req.cookies.token)) {
            return res.json({suc : false, msg : "invalid credentials"})
        }
        let conn;
	    try {
            console.log(req.body);
            // check the user is assitant
            const time = moment(new Date()).format("YYYY-MM-DD");

	    	conn = await util.getDBConnection(); // get connection from db
            await conn.beginTransaction();

            // insert data into table : scholarship_application
            const data = [req.body.assistant_s_num, req.body.application_id, req.body.documents_ready, req.body.committee_review, req.body.meeting_name, req.body.passed_date, req.body.scholarship_amount];
            const scholarship_audit_info = await conn.batch("INSERT INTO audit_form(`assistant_username`, `application_id`, `documents_ready`, `committee_review`, `meeting_name`, `passed_date`, `scholarship_amount`) VALUES(?, ?, ?, ?, ?, ?, ?);", data);
            await conn.commit();

            res.json({suc : true});
	    }
	    catch(e) {
            console.log(e);
            await conn.rollback();
            res.json({suc : false});
	    }
	    finally {
		    util.closeDBConnection(conn); // close db connection
	    }
    }
    catch(e) {
        console.log(e);
    }
})

module.exports = router;