import { chromium } from 'playwright';
import log from 'electron-log';
import tabsPkg from './common/tabs.js';

const { preparePage, safeDisconnectBrowser } = tabsPkg;

const parseDateInput = (dateStr) => {
  if (!dateStr) return null;
  if (typeof dateStr === 'number' && Number.isFinite(dateStr)) return new Date(dateStr);
  if (dateStr instanceof Date && !Number.isNaN(dateStr.getTime())) return dateStr;
  const raw = String(dateStr).trim();
  const ymdMatch = raw.match(/(\d{4}-\d{2}-\d{2})/);
  if (ymdMatch) return new Date(`${ymdMatch[1]}T00:00:00`);
  const mmddMatch = raw.match(/(\d{2}-\d{2})/);
  if (mmddMatch) {
    const year = new Date().getFullYear();
    return new Date(`${year}-${mmddMatch[1]}T00:00:00`);
  }
  return null;
};

const formatMMDD = (d) => {
  const mm = String(d.getMonth() + 1).padStart(2, '0');
  const dd = String(d.getDate()).padStart(2, '0');
  return `${mm}-${dd}`;
};

const buildDateList = (startDate, endDate) => {
  const start = parseDateInput(startDate);
  const end = parseDateInput(endDate || startDate);
  if (!start || !end) return [];

  const from = start <= end ? start : end;
  const to = start <= end ? end : start;

  const dates = [];
  const cur = new Date(from.getTime());
  while (cur <= to) {
    dates.push(formatMMDD(cur));
    cur.setDate(cur.getDate() + 1);
  }
  return dates;
};

const findHeaderDateIndex = async (container, mmdd) => {
  for (let attempt = 0; attempt < 10; attempt++) {
    const headerCells = container.locator(
      "xpath=.//div[contains(@class,'headerRow')]/div[contains(@class,'headerContent')]",
    );
    const count = await headerCells.count();
    for (let i = 0; i < count; i++) {
      const text = (await headerCells.nth(i).innerText()).replace(/\s+/g, ' ').trim();
      if (text.includes(mmdd)) return i;
    }

    await container.evaluate((el) => {
      el.scrollLeft += 600;
    });
    await container.page().waitForTimeout(120);
  }
  return -1;
};

const toggleRoomByDateIndex = async (container, { roomType, dateIndex, operation }) => {
  const roomAnchor = container.getByText(roomType, { exact: true }).first();
  await roomAnchor.scrollIntoViewIfNeeded();

  const row = roomAnchor.locator(
    "xpath=ancestor::*[.//div[contains(@class,'boardRow')]][1]",
  );
  const boardRow = row.locator("xpath=.//div[contains(@class,'boardRow')]").first();

  const boardColPosition = dateIndex + 2;
  const dayColumn = boardRow.locator(`xpath=./div[${boardColPosition}]`);

  const targetStateClass = operation === 'open' ? 'error' : 'success';
  const expectedCurrentLabel = operation === 'open' ? '满' : '有';
  const barByLabel = dayColumn
    .locator(
      `xpath=.//*[ (contains(@class,'success') or contains(@class,'error')) and .//*[contains(normalize-space(),'${expectedCurrentLabel}')] ]//*[contains(@class,'bar')]`,
    )
    .first();
  const barByClass = dayColumn
    .locator(`xpath=.//*[contains(@class,'${targetStateClass}')]//*[contains(@class,'bar')]`)
    .first();
  const bar = (await barByLabel.count()) > 0 ? barByLabel : barByClass;

  await bar.waitFor({ state: 'visible' });
  await bar.scrollIntoViewIfNeeded();
  await bar.click();
};

(async () => {
  let browser;

  try {
    const prepared = await preparePage(chromium);
    browser = prepared.browser;
    const page = prepared.page;

    const targetUrl = 'https://hotel.fliggy.com/ebooking/hotelBaseInfoUv.htm#/ebk/homeV1';
    const currentUrl = page.url();
    if (!currentUrl || !currentUrl.startsWith(targetUrl)) {
      await page.goto(targetUrl);
    }

    await page.waitForTimeout(4000 + Math.random() * 300);

    await page.getByRole('menuitem', { name: '房价房量管理' }).click();
    await page.waitForTimeout(4000 + Math.random() * 1000);
    await page.getByText('房价房量日历').click();  

    const roomType = process.env.ROOM_TYPE;
    const startDate = process.env.START_DATE;
    const endDate = process.env.END_DATE;
    const operation = process.env.OPERATION === 'close' ? 'close' : 'open';

    if (!roomType || !startDate) {
      log.info('ROOM_TYPE/START_DATE not provided, skip room toggle.');
      return;
    }

    const container = page.locator('#price-reserve-table-container');
    await container.waitFor({ state: 'visible' });

    const dateList = buildDateList(startDate, endDate);
    for (const mmdd of dateList) {
      const dateIndex = await findHeaderDateIndex(container, mmdd);
      if (dateIndex < 0) {
        throw new Error(`Date not found in header: ${mmdd}`);
      }
      await toggleRoomByDateIndex(container, { roomType, dateIndex, operation });
      await page.waitForTimeout(600 + Math.random() * 600);
    } 
  } catch (error) {
    log.error(error);
    process.exitCode = 1;
  }finally {
    await safeDisconnectBrowser(browser);
  }
})();