import createNewButton from '~/contentScript/createButton';
import extractFirstAndLastName from '~/contentScript/utils/extractFirstAndLastName';
import { createPerson, fetchPerson } from '~/db/person.db';
import { PersonInput } from '~/db/types/person.types';

const insertButtonForPerson = async (): Promise<void> => {
  // Select the element in which to create the button.
  const parentDiv: HTMLDivElement | null = document.querySelector(
    '.pv-top-card-v2-ctas',
  );

  // Create the button with desired callback funciton to execute upon click.
  if (parentDiv) {
    // Extract person-specific data from the DOM.
    const personNameElement = document.querySelector('.text-heading-xlarge');

    const separatorElement = document.querySelector(
      '.pv-text-details__separator',
    );
    const personCityElement = separatorElement?.previousElementSibling;

    const profilePictureElement = document.querySelector(
      '.pv-top-card-profile-picture__image',
    );

    const firstListItem = document.querySelector(
      'div[data-view-name="profile-component-entity"]',
    );
    const secondDivElement = firstListItem?.querySelector('div:nth-child(2)');
    const ariaHiddenSpan = secondDivElement?.querySelector(
      'span[aria-hidden="true"]',
    );

    // Get the text content or other necessary data from the DOM elements.
    const personName = personNameElement ? personNameElement.textContent : '';
    const personCity = personCityElement
      ? personCityElement.textContent?.trim().replace(/\s+/g, ' ').split(',')[0]
      : '';
    const profilePicture = profilePictureElement
      ? profilePictureElement?.getAttribute('src')
      : '';
    const jobTitle = ariaHiddenSpan ? ariaHiddenSpan.textContent?.trim() : '';

    const { firstName, lastName } = extractFirstAndLastName(String(personName));

    // Prepare person data to send to the backend.
    const personData: PersonInput = {
      name: { firstName, lastName },
      city: personCity ?? '',
      avatarUrl: profilePicture ?? '',
      jobTitle: jobTitle ?? '',
      linkedinLink: { url: '', label: '' },
    };

    // Extract active tab url using chrome API - an event is triggered here and is caught by background script.
    let { url: activeTabUrl } = await chrome.runtime.sendMessage({
      action: 'getActiveTabUrl',
    });

    // Remove last slash from the URL for consistency when saving usernames.
    if (activeTabUrl.endsWith('/')) {
      activeTabUrl = activeTabUrl.slice(0, -1);
    }

    personData.linkedinLink = { url: activeTabUrl, label: activeTabUrl };

    const person = await fetchPerson({
      name: {
        firstName: { eq: firstName },
        lastName: { eq: lastName },
      },
      linkedinLink: { url: { eq: activeTabUrl }, label: { eq: activeTabUrl } },
    });

    if (person) {
      const savedPerson: HTMLDivElement = createNewButton(
        'Saved',
        async () => {},
      );

      // Include the button in the DOM.
      parentDiv.prepend(savedPerson);

      // Write button specific styles here - common ones can be found in createButton.ts.
      const buttonSpecificStyles = {
        marginRight: '0.5em',
      };

      Object.assign(savedPerson.style, buttonSpecificStyles);
    } else {
      const newButtonPerson: HTMLDivElement = createNewButton(
        'Add to Twenty',
        async () => {
          const response = await createPerson(personData);
          if (response) {
            newButtonPerson.textContent = 'Saved';
            newButtonPerson.setAttribute('disabled', 'true');

            // Button specific styles once the button is unclickable after successfully sending data to server.
            newButtonPerson.addEventListener('mouseenter', () => {
              const hoverStyles = {
                backgroundColor: 'black',
                borderColor: 'black',
                cursor: 'default',
              };
              Object.assign(newButtonPerson.style, hoverStyles);
            });
          } else {
            newButtonPerson.textContent = 'Try Again';
          }
        },
      );

      // Include the button in the DOM.
      parentDiv.prepend(newButtonPerson);

      // Write button specific styles here - common ones can be found in createButton.ts.
      const buttonSpecificStyles = {
        marginRight: '0.5em',
      };

      Object.assign(newButtonPerson.style, buttonSpecificStyles);
    }
  }
};

export default insertButtonForPerson;