import Services from '../services/service';
import { addSubscription } from './subscription.utils';
import QRCode from 'qrcode';

//Copy Address
export async function copyToClipboard(fullAddress: string) {
  try {
    await navigator.clipboard.writeText(fullAddress);
    alert('Adresse copiée dans le presse-papiers !');
  } catch (err) {
    console.error('Failed to copy the address: ', err);
  }
}

//Generate emojis list
export function generateEmojiList(): string[] {
  const emojiRanges = [
    [0x1f600, 0x1f64f],
    [0x1f300, 0x1f5ff],
    [0x1f680, 0x1f6ff],
    [0x1f700, 0x1f77f],
  ];

  const emojiList: string[] = [];
  for (const range of emojiRanges) {
    const [start, end] = range;
    for (let i = start; i <= end && emojiList.length < 256; i++) {
      emojiList.push(String.fromCodePoint(i));
    }
    if (emojiList.length >= 256) {
      break;
    }
  }

  return emojiList.slice(0, 256);
}

//Adress to emojis
export async function addressToEmoji(text: string): Promise<string> {
  //Adress to Hash
  const encoder = new TextEncoder();
  const data = encoder.encode(text);
  const hashBuffer = await crypto.subtle.digest('SHA-256', data);

  const hash = new Uint8Array(hashBuffer);
  const bytes = hash.slice(-4);

  //Hash slice to emojis
  const emojiList = generateEmojiList();
  const emojis = Array.from(bytes)
    .map((byte) => emojiList[byte])
    .join('');
  return emojis;
}

//Get emojis from other device
async function emojisPairingRequest() {
  try {
    const container = document.getElementById('containerId');

    const urlParams: URLSearchParams = new URLSearchParams(window.location.search);
    const sp_adress: string | null = urlParams.get('sp_address');

    if (!sp_adress) {
      // console.error("No 'sp_adress' parameter found in the URL.");
      return;
    }

    const emojis = await addressToEmoji(sp_adress);
    const emojiDisplay = container?.querySelector('.pairing-request');

    if (emojiDisplay) {
      emojiDisplay.textContent = '(Request from: ' + emojis + ')';
    }
  } catch (err) {
    console.error(err);
  }
}

// Display address emojis and other device emojis
export async function displayEmojis(text: string) {
  console.log('🚀 ~ Services ~ adressToEmoji');
  try {
    const container = document.getElementById('containerId');
    const emojis = await addressToEmoji(text);
    const emojiDisplay = container?.querySelector('.emoji-display');

    if (emojiDisplay) {
      emojiDisplay.textContent = emojis;
    }

    emojisPairingRequest();

    initAddressInput();
  } catch (err) {
    console.error(err);
  }
}

// Verify Other address
export function initAddressInput() {
  const addressInput = document.getElementById('addressInput') as HTMLInputElement;
  const emojiDisplay = document.getElementById('emoji-display-2');
  const okButton = document.getElementById('okButton');
  addSubscription(addressInput, 'input', async () => {
    let address = addressInput.value;

    // Vérifie si l'adresse est une URL
    try {
      const url = new URL(address);
      // Si c'est une URL valide, extraire le paramètre sp_address
      const urlParams = new URLSearchParams(url.search);
      const extractedAddress = urlParams.get('sp_address') || ''; // Prend sp_address ou une chaîne vide

      if (extractedAddress) {
        address = extractedAddress;
        addressInput.value = address; // Met à jour l'input pour afficher uniquement l'adresse extraite
      }
    } catch (e) {
      // Si ce n'est pas une URL valide, on garde l'adresse originale
      console.log("Ce n'est pas une URL valide, on garde l'adresse originale.");
    }
    if (address) {
      const emojis = await addressToEmoji(address);
      if (emojiDisplay) {
        emojiDisplay.innerHTML = emojis;
      }
      if (okButton) {
        okButton.style.display = 'inline-block';
      }
    } else {
      if (emojiDisplay) {
        emojiDisplay.innerHTML = '';
      }
      if (okButton) {
        okButton.style.display = 'none';
      }
    }
  });

  if (okButton) {
    addSubscription(okButton, 'click', () => {
      onOkButtonClick();
    });
  }
}

async function onOkButtonClick() {
  const service = await Services.getInstance();
  const addressInput = (document.getElementById('addressInput') as HTMLInputElement).value;
  try {
    // Connect to target, if necessary
    const sharedSecret = await service.getSecretForAddress(addressInput);
    if (!sharedSecret) {
      const member = {
        sp_addresses: [addressInput],
      }
      const connectMemberResult = await service.connectMember([member]);
      await service.handleApiReturn(connectMemberResult);
    }
    // Create the process
    setTimeout(async () => {
      const relayAddress = await service.getRelayAddresses(); // Get one (or more?) relay addresses
      const createPairingProcessReturn = await service.createPairingProcess([addressInput], relayAddress[0], 1);

      if (!createPairingProcessReturn.updated_process) {
        throw new Error('createPairingProcess returned an empty new process'); // This should never happen
      }

      await service.handleApiReturn(createPairingProcessReturn);
    }, 1000);
  } catch (e) {
     console.error(`onOkButtonClick error: ${e}`);
  }
}

export async function generateQRCode(spAddress: string) {
  try {
    const container = document.getElementById('containerId');
    const currentUrl = 'https://' + window.location.host;
    const url = await QRCode.toDataURL(currentUrl + '?sp_address=' + spAddress);
    const qrCode = container?.querySelector('.qr-code img');
    qrCode?.setAttribute('src', url);

    //Generate Address CopyBtn
    const address = container?.querySelector('.sp-address-btn');
    if (address) {
      address.textContent = 'Copy address';
    }
    const copyBtn = document.getElementById('copyBtn');
    if (copyBtn) {
      addSubscription(copyBtn, 'click', () => copyToClipboard(currentUrl + '?sp_address=' + spAddress));
    }
  } catch (err) {
    console.error(err);
  }
}