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

const db = require("../dependencies");
const { update } = require("./reset")

router.get("/", (req, res) => {
    const transactions = db.prepare("SELECT transaction_id as id, postingDate, valueDate, title FROM transactions").all();

    res.send(transactions)

})


router.post("/", (req, res) => {
    const transaction = {
        postingDate: req.body.postingDate,
        valueDate: req.body.valueDate,
        title: req.body.title,
        entries: req.body.entries
    }

    const db_transaction = db.prepare("INSERT INTO transactions (postingDate, valueDate, title) VALUES (?, ?, ?) RETURNING transaction_id").run(transaction.postingDate, transaction.valueDate, transaction.title)

    for (let i = 0; i < transaction.entries.length; i++) {
        const db_entries = db.prepare("INSERT INTO transaction_entries (transaction_id, account_name, amount, label) VALUES (?, ?, ?, ?)").run(db_transaction.lastInsertRowid, transaction.entries[i].account, transaction.entries[i].amount, transaction.entries[i].label)
    }


    res.send({
        id: db_transaction.lastInsertRowid
    })
    for (res of update.values()) {
        // res.write("data: update\n\n")
        res.write('event: update\n');
        res.write('data: {}\n\n');
    }

})

router.get("/:id", (req, res) => {
    const transaction = db.prepare("SELECT postingDate, valueDate, title FROM transactions WHERE transaction_id = ?").get(req.params.id);
    const entries = db.prepare("SELECT account_name as account, amount, label FROM transaction_entries WHERE transaction_id = ?").all(req.params.id)

    transaction["entries"] = entries
    console.log(transaction)

    res.send(transaction)
})

router.put("/:id", (req, res) => {
    const transaction = db.prepare("UPDATE transactions SET postingDate = ?, valueDate = ?, title = ? WHERE transaction_id = ?").run(req.body.postingDate, req.body.valueDate, req.body.title, req.params.id)


    const delete_entries = db.prepare("DELETE FROM transaction_entries WHERE transaction_id = ?").run(req.params.id)
    for (let i = 0; i < req.body.entries.length; i++) {
        const db_entries = db.prepare("INSERT INTO transaction_entries (transaction_id, account_name, amount, label) VALUES (?, ?, ?, ?)").run(req.params.id, req.body.entries[i].account, req.body.entries[i].amount, req.body.entries[i].label)
    }


    res.status(204).send()
    for (res of update.values()) {
        res.write('event: update\n');
        res.write('data: {}\n\n');
    }

})

router.delete("/:id", (req, res) => {
    const delete_entries = db.prepare("DELETE FROM transaction_entries WHERE transaction_id = ?").run(req.params.id)
    const delete_transaction = db.prepare("DELETE FROM transaction WHERE transaction_id = ?").run(req.params.id)


    res.status(204).send()
    for (res of update.values()) {
        // res.write("data: update\n\n")
        res.write('event: update\n');
        res.write('data: {}\n\n');
    }

})

module.exports = router;