import { Config } from "./config";
import { Shop } from "./shopifyApi";
import { Product } from "./Product";
import { getRowByColumnValue, getCellRangeByColumnName, toastAndLog } from "./sheetUtils";

// Declare SpreadsheetApp globally for Google Apps Script environment
declare var SpreadsheetApp: GoogleAppsScript.Spreadsheet.SpreadsheetApp;

export function checkRecentSales() {
  console.log("Starting checkRecentSales...");
  const config = new Config();
  const freq = config.salesSyncFrequency || 10;

  // 2.5x lookback
  const now = new Date();
  const lookbackMs = freq * 2.5 * 60 * 1000;
  const startTime = new Date(now.getTime() - lookbackMs);

  const shop = new Shop();
  console.log(`Fetching orders from ${startTime.toISOString()} to ${now.toISOString()}`);

  const orders = shop.FetchOrders(startTime, now);
  console.log(`Found ${orders.length} orders.`);

  syncOrders(orders, shop);
}

export function reconcileSalesHandler() {
    const ui = SpreadsheetApp.getUi();
    const result = ui.prompt("Reconcile Sales", "Enter number of days to look back:", ui.ButtonSet.OK_CANCEL);

    if (result.getSelectedButton() == ui.Button.OK) {
        const days = parseInt(result.getResponseText());
        if (isNaN(days) || days <= 0) {
            toastAndLog("Invalid number of days.");
            return;
        }

        toastAndLog(`Reconciling sales for last ${days} days...`);
        const now = new Date();
        const startTime = new Date(now.getTime() - (days * 24 * 60 * 60 * 1000));

        const shop = new Shop();
        const orders = shop.FetchOrders(startTime, now);
        toastAndLog(`Found ${orders.length} orders. Syncing...`);

        syncOrders(orders, shop);
        toastAndLog("Reconciliation complete.");
    }
}

function syncOrders(orders: any[], shop: Shop) {
  const processedSkus = new Set<string>();

  for (const order of orders) {
    const lineItems = order.line_items;
    if (!lineItems || !Array.isArray(lineItems)) continue;

    for (const item of lineItems) {
      const sku = item.sku;
      if (!sku) continue;

      if (processedSkus.has(sku)) continue;
      processedSkus.add(sku);

      console.log(`Processing sold SKU: ${sku}`);

      try {
        const row = getRowByColumnValue("product_inventory", "sku", sku);
        if (!row) {
          console.log(`SKU ${sku} not found in sheet.`);
          continue;
        }

        const sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("product_inventory");
        if (!sheet) {
            console.error("Could not find product_inventory sheet");
            continue;
        }

        // 1. Update status to 'sold'
        const statusCell = getCellRangeByColumnName(sheet, "status", row);
        if (statusCell) {
             const currentStatus = statusCell.getValue();
             if (currentStatus !== "sold") {
                 statusCell.setValue("sold");
                 console.log(`Set status='sold' for SKU ${sku}`);
             }
        } else {
            console.warn(`Could not find 'status' column for SKU ${sku}`);
        }

        // 2. Sync Shopify Status
        // Use Product class to fetch fresh data
        const product = new Product(sku);
        product.MatchToShopifyProduct(shop);

        if (product.shopify_product && product.shopify_product.status) {
           const shopifyStatusCell = getCellRangeByColumnName(sheet, "shopify_status", row);
           if (shopifyStatusCell) {
               shopifyStatusCell.setValue(product.shopify_product.status);
               console.log(`Updated shopify_status='${product.shopify_product.status}' for SKU ${sku}`);
           }
        }

      } catch (e) {
        console.error(`Error processing SKU ${sku}: ${e}`);
      }
    }
  }
}