const express = require("express");
const router = express.Router();

const db = require("../dependencies");

router.get("/", (req, res) => {
    const accs = db.prepare(`SELECT number, name, qualifiedName, description, type, localBalance, te.balance  FROM accounts 
    JOIN (SELECT SUM(amount) as balance, account_name FROM transaction_entries GROUP BY account_name) te ON te.account_name = name`).all();
    new_accs = [];
    for (let i=0; i < accs.length; i++) {
        accs[i]["subaccounts"] = [];
    }
    res.send(accs);
});



router.post("/", (req, res) => {
    const number = req.body.number;
    const name = req.body.name;
    const des = req.body.description;
    const type = req.body.type;
    const qualifiedName = req.body.parentAccount + ":" + name
    const new_acc = db.prepare(`INSERT INTO accounts (number, name, qualifiedName, description, type, balance, localBalance) VALUES (?, ?, ? ,?, ?, 0, 0)`).run(number ,name, qualifiedName,des, type)
    res.status(204).send()

});

router.get("/:account", (req, res) => {
    const acc = db
        .prepare("SELECT * FROM accounts WHERE name = ?")
        .get(req.params.account);

    if (acc == undefined) {
        res.status(404).send({
            code: 404,
            message: "Account not found",
            additionalPropl: {}
        });
    } else {
        entries = db.prepare(`
        SELECT 
	transaction_entries.transaction_id as id,
        offsetAccounts,
        transaction_entries.amount,
        transaction_entries.label,
        postingDate,
        valueDate,
        title
        from transaction_entries 
        JOIN transactions ON transaction_entries.transaction_id = transactions.transaction_id
        JOIN (SELECT account_name as offsetAccounts, transaction_id FROM transaction_entries) te ON te.transaction_id = id  AND offsetAccounts IS NOT transaction_entries.account_name
        WHERE transaction_entries.account_name = ?`).all(req.params.account)
        acc['entries'] = entries
        res.send(acc);
    }
});



router.put("/:account", (req, res) => {
    const oldname = req.params.account;
    const name = req.body.name;
    const description = req.body.description;
    const type = req.body.type;
    const qualifiedName = req.body.parentAccount + ":" + name;

    const acc = db.prepare(`UPDATE accounts SET description = ?, name = ?, qualifiedName = ?, type = ? WHERE name=?`).run(description, name, qualifiedName, type, oldname);

    if (acc == undefined) {
        res.status(404).send({
            code: 404,
            message: "Account not found",
            additionalPropl: {}
        })
    } else {
        res.status(204).send()
    }
});

router.delete("/:account", (req, res) => {
    const acc = db.prepare("DELETE FROM accounts WHERE name = ? RETURNING *").run(req.params.account)

    res.status(200).send()
});


module.exports = router;