#!/usr/bin/env node

const puppeteer = require("puppeteer"),
    config = require("./config.json");

function log(message) {
    console.log(`${new Date().toString().replace(/ GMT.*/, "")}: ${message}`);
}

async function clickButtonWithText(page, text) {
    const [ button ] = await page.$x(`//button[contains(., '${text}')]`);

    if (typeof button !== "undefined") {
        await button.click();
        return true;
    } else {
        return false;
    }
}

async function run() {
    const browser = await puppeteer.launch({
        headless: false,
        product: "firefox",
        defaultViewport: { width: 1440, height: 724 }
    });

    const page = await browser.newPage(),
        maxVariance = 8;

    let success = true,
        randomVariance = 0,
        currentTry = 1;

    log("Started bot");

    while (true) {
        await page.goto("https://secure.newegg.ca/NewMyAccount/AccountLogin.aspx?nextpage=https%3a%2f%2fwww.newegg.ca%2f", { waitUntil: "load" });

        if (page.url().includes("signin")) {
            try {
                await page.waitForSelector("button.btn.btn-orange", { timeout: 2500 });
                await page.type("#labeled-input-signEmail", config.username);
                await page.click("button.btn.btn-orange");
                await page.waitForTimeout(1500);

                try {
                    await page.waitForSelector("#labeled-input-password", { timeout: 2500 });
                    await page.waitForSelector("button.btn.btn-orange");
                    await page.type("#labeled-input-password", config.password);
                    await page.click("button.btn.btn-orange");
                    log("Successfully logged in");
                } catch (err) {
                    log("Fail: Manual authorization code required by Newegg. This should only happen once.");
                    success = false;
                }
            } catch (err) {
                log("Fail: Login form missing");
                success = false;
            }

            break;
        } else {
            await page.waitForTimeout(1000);
        }
    }

    if (success) {
        await page.waitForTimeout(3500);

        while (true) {
            await page.goto(`https://www.newegg.ca/${config.item_page}`, { waitUntil: "load" });

            if (await clickButtonWithText(page, "Add to cart")) {
                log("Adding the product the to cart");
                await page.waitForSelector(".modal-content", { timeout: 5000 });
                await page.waitForTimeout(1000);

                if (await clickButtonWithText(page, "No, thanks")) {
                    log("Rejected product coverage option");
                }

                try {
                    await page.waitForSelector(".message-title", { timeout: 5000 });
                    log("Successfully added the item to the cart!");
                } catch (error) {
                    log("Fail: Added to cart but no success window appeared");
                    success = false;
                }

                break;
            } else if (currentTry > config.refresh_tries) {
                log(`Fail: Maximum number of refresh tries reached (${config.refresh_tries})`);
                success = false;
                break;
            } else {
                randomVariance = Math.floor(Math.random() * maxVariance);
                log(`(${currentTry}) Product currently unavailable, retrying in ${Number(config.refresh_time) + randomVariance} seconds...`);
                currentTry++;
                await page.waitForTimeout((Number(config.refresh_time) + randomVariance) * 1000);
            }
        }
    }

    if (success) {
        while (true) {
            log("Navigating to secure checkout");
            await page.goto("https://secure.newegg.ca/shop/cart", { waitUntil: "load" });

            const totalPriceElement = await page.$(".summary-content-total span strong"),
                totalPrice = await page.evaluate(totalPriceElement => totalPriceElement.textContent, totalPriceElement);

            if (typeof totalPrice === "undefined" || totalPrice === "" || totalPrice === null) {
                log("Fail: Unable to determine total price");
                break;
            }

            if (Number(totalPrice) > config.price_limit) {
                log(`Fail: Total price of "${totalPrice}" exceeds price limit`);
                break;
            }

            if (await clickButtonWithText(page, "Secure Checkout")) {
                await page.waitForTimeout(3000);

                if (await clickButtonWithText(page, "Continue to payment")) {
                    log("Continuing to payment...");
                    await page.waitForSelector("[placeholder=\"CVV2\"]", { timeout: 2500 });
                    await page.waitForTimeout(1000);
                    log("Filling out the cv2...");
                    await page.type("[placeholder=\"CVV2\"]", config.cv2);

                    if (await clickButtonWithText(page, "Review your order")) {
                        log("Reviewing order...");

                        if (config.auto_submit === "true") {
                            if (await clickButtonWithText(page, "Place Order")) {
                                log("Order placed!!!");
                            } else {
                                log("Fail: Unable to press the Place Order button");
                            }
                        } else {
                            log("The auto_submit config value is set to false");
                        }
                    } else {
                        log("Fail: Unable to click the 'Review your order' button");
                    }

                    break;
                } else {
                    await page.waitForTimeout(1000);
                }
            } else {
                await page.waitForTimeout(1000);
            }
        }
    }

    if (!success) {
        await browser.close();
    }
}

run();