import type { BusinessRecord } from './classes.businessrecord.js';
import type { OpenData } from './classes.main.opendata.js';
import * as plugins from './plugins.js';

/**
 * the HandlesRegister exposed as a class
 */
export class HandelsRegister {
  private openDataRef: OpenData;

  public smartbrowserInstance = new plugins.smartbrowser.SmartBrowser();

  constructor(openDataRef: OpenData) {
    this.openDataRef = openDataRef;
  }

  public async start() {
    await this.smartbrowserInstance.start();
  }

  public async stop() {
    await this.smartbrowserInstance.stop();
  }

  // page stuff
  public getNewPage = async () => {
    const page = await this.smartbrowserInstance.headlessBrowser.newPage();
    await page.setViewport({ width: 1920, height: 1080 });
    await page.goto('https://www.handelsregister.de/');
    return page;
  };

  private navigateToPage = async (
    pageArg: plugins.smartbrowser.smartpuppeteer.puppeteer.Page,
    pageNameArg: string
  ) => {
    try {
      await pageArg.evaluate((pageNameArg2) => {
        const elements = Array.from(document.querySelectorAll('.ui-menuitem-text > span'));
        const targetElement = elements.find((el) => el.textContent?.trim() === pageNameArg2);
        if (targetElement) {
          (targetElement as HTMLElement).click();
        }
      }, pageNameArg);
      console.log(`Navigated to the ${pageNameArg} page successfully.`);
    } catch (error) {
      console.error(`Failed to navigate to the ${pageNameArg} page:`, error);
    }
  };

  private waitForResults = async (pageArg: plugins.smartbrowser.smartpuppeteer.puppeteer.Page) => {
    await pageArg.waitForSelector('#ergebnissForm\\:selectedSuchErgebnisFormTable_data', {
      timeout: 30000,
    });

    const businessRecords: BusinessRecord['data'][] = await pageArg.evaluate(() => {
      const rows = document.querySelectorAll(
        '#ergebnissForm\\:selectedSuchErgebnisFormTable_data > tr'
      );
      const records: BusinessRecord['data'][] = [];

      rows.forEach((row) => {
        const nameElement = row.querySelector('td.ui-panelgrid-cell span.marginLeft20');
        const cityElement = row.querySelector('td.ui-panelgrid-cell.sitzSuchErgebnisse span');
        const statusElement = row.querySelector('td.ui-panelgrid-cell span.verticalText');
        const registrationCourtElement = row.querySelector(
          'td.ui-panelgrid-cell.fontTableNameSize'
        );

        const name = nameElement?.textContent?.trim();
        const city = cityElement?.textContent?.trim();
        const status = statusElement?.textContent?.trim();
        const registrationId = registrationCourtElement?.textContent?.trim();

        // Push parsed data into records array
        records.push({
          name,
          city,
          registrationId,
          businessType: status,
        });
      });

      return records;
    });
    return businessRecords;
  };

  private clickFindButton = async (pageArg: plugins.smartbrowser.smartpuppeteer.puppeteer.Page) => {
    try {
      // Wait for the button with the text "Find" to appear
      await pageArg.waitForSelector('span.ui-button-text.ui-c', { timeout: 5000 });

      // adjust to 100 results per page
      await pageArg.select('#form\\:ergebnisseProSeite_input', '100');

      // Locate and click the button using its text
      await pageArg.evaluate(() => {
        const buttons = Array.from(document.querySelectorAll('span.ui-button-text.ui-c'));
        const targetButton = buttons.find((button) => button.textContent?.trim() === 'Find');
        if (targetButton) {
          const parentButton = targetButton.closest('button') || targetButton;
          (parentButton as HTMLElement).click();
        }
      });

      console.log('Find button clicked successfully!');
    } catch (error) {
      console.error('Failed to find or click the "Find" button:', error);
    }
  };

  // parsing stuff
  private async parseGermanRegistration(
    input: string
  ): Promise<BusinessRecord['data']['germanParsedRegistration']> {
    const regex =
      /District court (\p{L}[\p{L}\s-]*?(?:\s*\([\p{L}\s-]+\))?)\s+(HRA|HRB|GnR|VR|PR|GsR)\s+(\d+)/u;
    const match = input.match(regex);

    if (match) {
      return {
        court: match[1], // Extracts the court name
        type: match[2] as 'HRA' | 'HRB', // Extracts the type and ensures it matches the specified types
        number: match[3], // Extracts the number
      };
    }
  }

  /**
   * Search for a company by name
   */
  public async searchCompany(companyNameArg: string) {
    const page = await this.getNewPage();
    await this.navigateToPage(page, 'Normal search');

    try {
      // Wait for the textarea to appear
      await page.waitForSelector('#form\\:schlagwoerter', { timeout: 5000 });

      // Enter text into the textarea using page.evaluate
      const inputText = companyNameArg;
      await page.evaluate((text) => {
        const textarea = document.querySelector<HTMLTextAreaElement>('#form\\:schlagwoerter');
        if (textarea) {
          textarea.value = text; // Set the value
          // Trigger the change event manually if required
          const event = new Event('change', { bubbles: true });
          textarea.dispatchEvent(event);
        }
      }, inputText);

      console.log('Text entered successfully!');
    } catch (error) {
      console.error('Failed to find or enter text into the textarea:', error);
    }

    try {
      // Wait for the radio button's label to appear
      await page.waitForSelector('label[for="form:schlagwortOptionen:0"]', { timeout: 5000 });

      // Click the label to select the radio button
      await page.evaluate(() => {
        const label = document.querySelector<HTMLLabelElement>(
          'label[for="form:schlagwortOptionen:0"]'
        );
        if (label) {
          label.click();
        }
      });

      console.log('Radio button clicked successfully!');
    } catch (error) {
      console.error('Failed to find or click the radio button:', error);
    }

    await this.clickFindButton(page);

    const businessRecords = await this.waitForResults(page);

    for (const record of businessRecords) {
      record.germanParsedRegistration = await this.parseGermanRegistration(record.registrationId);
    }

    await page.close();

    // Finally, we return an object, which triggers a JSON file download
    return businessRecords;
  }

  public async getSpecificCompany(companyArg: BusinessRecord['data']['germanParsedRegistration']) {
    const page = await this.getNewPage();
    await this.navigateToPage(page, 'Normal search');
    await page.waitForSelector('#form\\:schlagwoerter', { timeout: 5000 });

    // 1) Type of Register:
    // Open the dropdown to reveal options
    await page.waitForSelector('#form\\:registerArt_label');
    await page.click('#form\\:registerArt_label'); // Open the dropdown

    // Wait for the options and select the one matching companyArg.type
    await page.waitForSelector('#form\\:registerArt_items'); // Ensure dropdown options are loaded
    await page.evaluate((type) => {
      const options = Array.from(document.querySelectorAll('#form\\:registerArt_items li'));
      const targetOption = options.find((option) => option.textContent?.trim() === type); // Match type dynamically
      (targetOption as any)?.click();
    }, companyArg.type); // Pass companyArg.type to the browser context

    // 2) Register number:
    // Fill in the register number
    await page.waitForSelector('#form\\:registerNummer');
    await page.type('#form\\:registerNummer', companyArg.number);

    // 3) Register court:
    // Open the dropdown for the register court
    await page.waitForSelector('#form\\:registergericht_label');
    await page.click('#form\\:registergericht_label'); // Open the dropdown

    // Wait for the options and select the one matching companyArg.court
    await page.waitForSelector('#form\\:registergericht_items'); // Ensure dropdown options are loaded
    await page.evaluate((court) => {
      const options = Array.from(document.querySelectorAll('#form\\:registergericht_items li'));
      const targetOption = options.find((option) => option.textContent?.trim() === court); // Match court dynamically
      (targetOption as any)?.click();
    }, companyArg.court); // Pass companyArg.court to the browser context

    await this.clickFindButton(page);

    const businessRecords = await this.waitForResults(page);
    console.log(businessRecords);

    // Define the response listener
    const responseListener = async (
      response: plugins.smartbrowser.smartpuppeteer.puppeteer.HTTPResponse
    ) => {
      // Ignore preflight (OPTIONS) requests
      if (response.request().method() === 'OPTIONS') {
        console.log(`Ignoring preflight request: ${response.url()}`);
        return;
      }

      // Check for downloads (Content-Disposition header)
      const contentDisposition = response.headers()['content-disposition'];

      if (contentDisposition && contentDisposition.includes('attachment')) {
        console.log(`Download detected: ${response.url()}`);
        try {
          const buffer = await response.buffer();
          console.log(`Downloaded file size: ${buffer.length} bytes`);
        } catch (error) {
          console.error('Error downloading file:', error);
        }
      }
    };
    page.on('response', responseListener);

    // Click the element
    await page.evaluate(() => {
      // Locate the table body
      const tableBody = document.querySelector(
        '#ergebnissForm\\:selectedSuchErgebnisFormTable_data'
      );
      if (!tableBody) {
        throw new Error('Table body not found');
      }

      // Locate the first row
      const firstRow = tableBody.querySelector('tr:nth-child(1)');
      if (!firstRow) {
        throw new Error('First row not found');
      }

      // Locate the last cell in the first row
      const lastCell = firstRow.querySelector('td:last-child');
      if (!lastCell) {
        throw new Error('Last cell not found in the first row');
      }

      // Locate the last <a> element in the last cell
      const lastLink = lastCell.querySelector('a:last-of-type');
      if (!lastLink) {
        throw new Error('Last link not found in the last cell');
      }

      // Simulate a click on the last <a> element
      (lastLink as HTMLElement).click();
    });

    // Optional: Wait for some response or navigation triggered by the click
    await page.waitForTimeout(10000);

    page.off('response', responseListener);
  }
}