// ==UserScript==
// @name         Export Shopee Orders to JSON
// @namespace    https://yukai.dev
// @version      0.1.3
// @description  Export Shopee Orders to JSON
// @author       Yukai Huang
// @match        https://shopee.tw/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=shopee.tw
// @downloadURL https://gist.github.com/Yukaii/200056f0c517fbd51eb20c7c43edbffe/raw/export-shopee-order.user.js
// @updateURL https://gist.github.com/Yukaii/200056f0c517fbd51eb20c7c43edbffe/raw/export-shopee-order.user.js
// @grant           GM_openInTab
// @run-at          context-menu
// ==/UserScript==

(async function() {
    'use strict';

    function getAllOrderAndCheckoutList(offset = 0, limit = 20) {
        return fetch(
            `https://shopee.tw/api/v4/order/get_all_order_and_checkout_list?limit=${limit}&offset=${offset}`,
        ).then((res) => res.json());
    }

    async function getOrders() {
        let orders = []

        for (let offset = 0; ;) {
            const { error, data } = await getAllOrderAndCheckoutList(offset);

            if (error || !data) {
                break
            }

            const { next_offset, order_data } = data

            if (next_offset === -1) {
                break
            }

            orders.push(...order_data.details_list);

            offset = next_offset
        }

        return orders;
    }

    function saveOrders(orders) {
        const data = JSON.stringify(orders, null, 2);

        // prompt browser to download file
        const blob = new Blob([data], { type: 'application/json' });
        const url = URL.createObjectURL(blob);

        const a = document.createElement('a');
        a.href = url;
        const timestamp = new Date().toISOString().replace(/:/g, '-');
        a.download = `orders-${timestamp}.json`;
        a.click();
    }

    const orders = await getOrders();
    saveOrders(orders)
})();