import { AccountInfo, Connection, PublicKey } from '@solana/web3.js';
import { toSvg } from 'jdenticon';
import fetch from 'cross-fetch';
import btoa from 'btoa';
import { ProfilePictureAccountLayout } from './layouts';
import { ProfilePictureAccount, ProfilePictureConfig } from './types';
import { PROFILE_PICTURE_PROGRAM } from './index';
import { Buffer } from 'buffer';

const PROFILE_PICTURE_PREFIX = 'nft_profile';

const canBeResized = (url) => {
  return !(url.includes('.svg') || url.endsWith('.svg') || url.endsWith('=svg') || url.endsWith('.gif') || url.endsWith('=gif') || url.startsWith('data:'));
};

export const getResizedImageUrl = (url, options = { width: 100 }) => {
  if (!url) {
    return false;
  }

  if (!canBeResized(url)) {
    return url;
  }

  const optionsString = Object.keys(options).map((item) => `${encodeURIComponent(item)}=${encodeURIComponent(options[item])}`).join(',');
  return `https://solana-cdn.com/cdn-cgi/image/${optionsString}/${url}`;
};

export function decodeProfilePictureAccount (account: AccountInfo<any>): ProfilePictureAccount {
  if (account.data.length !== ProfilePictureAccountLayout.span) {
    throw new Error(`Invalid account size. Expected ${ProfilePictureAccountLayout.span}, got ${account.data.length}`);
  }

  return ProfilePictureAccountLayout.decode(account.data);
}

export async function getProfilePicturePDA (publicKey: PublicKey): Promise<PublicKey> {
  const [ result ] = await PublicKey.findProgramAddress([
    Buffer.from(PROFILE_PICTURE_PREFIX),
    publicKey.toBuffer()
  ], PROFILE_PICTURE_PROGRAM);

  return result;
}

export function generateUrl (url: string | null, ownerPublicKey: PublicKey, config: ProfilePictureConfig): string {
  if (url) {
    if (config.resize) {
      return getResizedImageUrl(url, config.resize)
    }

    return url;
  }

  if (config.fallback) {
    const svg = toSvg(ownerPublicKey.toString(), 100);
    return `data:image/svg+xml;base64,${btoa(svg)}`;
  }

  return 'data:image/svg+xml;base64,PHN2ZyB2ZXJzaW9uPSIxLjEiIHZpZXdCb3g9IjAgMCAyNCAyNCIgaGVpZ2h0PSIxMDAiIHdpZHRoPSIxMDAiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PGcgaWQ9ImJvcmRlcnMtYW5kLWJhY2tncm91bmRzIiB0cmFuc2Zvcm09InRyYW5zbGF0ZSg1LDQpIj48cGF0aCBkPSJtMCAwaDEwdjFoLTl2MTRoMXYxaC0yeiIvPjxwYXRoIGQ9Im0xMCA0aDR2M2gtMXYtMmgtM3oiLz48cGF0aCBkPSJtMTQgMTZ2LTZoLTF2NWgtNXYxeiIvPjxwYXRoIGQ9Im0xMiAxNHYtM2gtMXYyaC0ydjF6IiBmaWxsPSIjYmNiY2MzIi8+PHBhdGggZD0ibTEwIDBoMXYxaDF2MWgxdjFoMXYxaC0xdi0xaC0xdi0xaC0xdjJoLTF6IiBmaWxsPSIjODc4Nzg3Ii8+PHBhdGggZD0ibTIgMmg4djNoMnYyaC00djVoLTJ2MWgtMnYxaC0yeiIgZmlsbD0iI2JjYmNjMyIvPjwvZz48ZyBpZD0ibGVmdGV5ZSIgdHJhbnNmb3JtPSJ0cmFuc2xhdGUoNSw0KSI+PHBhdGggZD0ibTUgM2gydjNoLTN2LTJoMXYxaDF2LTFoLTF6IiBmaWxsPSIjMDA4OTFlIi8+PHBhdGggZD0ibTUgNGgxdjFoLTF6IiBmaWxsPSIjMDBmMjQ4Ii8+PHBhdGggZD0ibTcgNGgxdjJoLTF2MWgtMnYtMWgyeiIvPjwvZz48ZyBpZD0icmlnaHRleWUiIHRyYW5zZm9ybT0idHJhbnNsYXRlKDUsNCkiPjxwYXRoIGQ9Im04IDdoM3YyaC0xdi0xaC0xdjFoMXYxaC0yeiIgZmlsbD0iIzAwNjRmYiIvPjxwYXRoIGQ9Im05IDhoMXYxaC0xeiIgZmlsbD0iIzAwZmJmZSIvPjxwYXRoIGQ9Im0xMCA5aDF2MWgtMXoiIGZpbGw9IiMwMDMyOTMiLz48cGF0aCBkPSJtMTEgN2gxdjJoLTF6Ii8+PHBhdGggZD0ibTggMTBoMnYxaC0yeiIvPjwvZz48ZyBpZD0ibW91dGgiIHRyYW5zZm9ybT0idHJhbnNsYXRlKDUsNCkiPjxwYXRoIGQ9Im0zIDhoMXYxaDF2MWgxdjFoMXYxaC0xdi0xaC0xdi0xaC0xdi0xaC0xeiIgZmlsbD0iI2ZmMzkwMCIvPjxwYXRoIGQ9Im0zIDloMXYxaDF2MWgxdjFoLTN6IiBmaWxsPSIjZjczYWUxIi8+PHBhdGggZD0ibTMgMTJoM3YxaC0zeiIvPjwvZz48L3N2Zz4=';
}

export async function getParsedMultipleAccountsInfo (connection: Connection, publicKeys: PublicKey[]) {
  const response = await fetch(connection.rpcEndpoint, {
    method: 'POST',
    body: JSON.stringify({
      jsonrpc: '2.0',
      id: '42',
      method: 'getMultipleAccounts',
      params: [
        publicKeys.map((publicKey) => publicKey.toString()),
        {
          commitment: connection.commitment || 'processed',
          encoding: 'jsonParsed'
        }
      ]
    }),
    headers: {
      'Content-Type': 'application/json'
    }
  });

  const data = await response.json()

  return data?.result?.value || [];
}