import { getBalanceSol, getStoredSolanaWalletChoices, encodeSolanaSecretKeyBase58, formatSol } from './solana-wallet-service.js';
import { state } from '../state.js';

const FREE_TURBO_UPLOAD_BYTES = 100 * 1024;
const WINC_PER_CREDIT = 1_000_000_000_000n;

let turboLibPromise = null;

function parseSolToLamports(amountSol) {
  const raw = String(amountSol ?? '').trim().replace(',', '.');
  const match = raw.match(/^(\d+)(?:\.(\d+))?$/);
  if (!match) {
    throw new Error('Сумма пополнения должна быть числом');
  }
  const intPart = BigInt(match[1] || '0');
  const frac = String(match[2] || '');
  if (frac.length > 9) {
    throw new Error('Слишком много знаков после запятой для SOL');
  }
  const fracPadded = `${frac}${'0'.repeat(9 - frac.length)}`;
  const lamports = (intPart * 1_000_000_000n) + BigInt(fracPadded || '0');
  if (lamports <= 0n) {
    throw new Error('Сумма пополнения должна быть больше 0');
  }
  return lamports.toString();
}

function normalizeKeySource(value) {
  return String(value || '').trim().toLowerCase() === 'root' ? 'root' : 'client';
}

async function loadTurboLib() {
  if (!turboLibPromise) {
    turboLibPromise = import('../vendor/turbo-sdk.web.bundle.js');
  }
  return turboLibPromise;
}

async function getTurboWalletChoice({ login, storagePwd, keySource = 'client' } = {}) {
  const normalizedKeySource = normalizeKeySource(keySource);
  const choices = await getStoredSolanaWalletChoices({ login, storagePwd, includeRoot: true });
  const selected = choices.find((item) => item.keySource === normalizedKeySource) || choices[0] || null;
  if (!selected?.keypair) {
    throw new Error(normalizedKeySource === 'root'
      ? 'На устройстве не найден root key для Turbo.'
      : 'На устройстве не найден client key для Turbo.');
  }
  return selected;
}

async function createTurboClientFromWalletChoice(choice) {
  const moduleRef = await loadTurboLib();
  const TurboFactory = moduleRef?.TurboFactory;
  if (!TurboFactory?.authenticated) {
    throw new Error('Turbo SDK не удалось инициализировать.');
  }
  const privateKey = await encodeSolanaSecretKeyBase58(choice.keypair.secretKey);
  return TurboFactory.authenticated({
    privateKey,
    token: 'solana',
  });
}

function creditsFromWinc(winc) {
  const value = BigInt(String(winc || '0'));
  return Number(value) / Number(WINC_PER_CREDIT);
}

function shortAddress(value) {
  const raw = String(value || '').trim();
  if (raw.length <= 16) return raw;
  return `${raw.slice(0, 8)}...${raw.slice(-6)}`;
}

export function isFreeTurboUploadSize(byteLength) {
  const bytes = Number(byteLength || 0);
  return Number.isFinite(bytes) && bytes > 0 && bytes <= FREE_TURBO_UPLOAD_BYTES;
}

export function getFreeTurboUploadBytesLimit() {
  return FREE_TURBO_UPLOAD_BYTES;
}

export function formatTurboCredits(value, digits = 6) {
  const n = Number(value);
  if (!Number.isFinite(n)) return '0';
  return n.toLocaleString('ru-RU', {
    minimumFractionDigits: 0,
    maximumFractionDigits: digits,
  });
}

export async function getTurboContextForStoredSolanaKey({ login, storagePwd, keySource = 'client' } = {}) {
  const choice = await getTurboWalletChoice({ login, storagePwd, keySource });
  const turbo = await createTurboClientFromWalletChoice(choice);
  return {
    turbo,
    address: choice.address,
    keySource: choice.keySource,
    label: choice.label,
    keypair: choice.keypair,
    shortAddress: shortAddress(choice.address),
  };
}

export async function getTurboBalanceForStoredSolanaKey({ login, storagePwd, keySource = 'client' } = {}) {
  const ctx = await getTurboContextForStoredSolanaKey({ login, storagePwd, keySource });
  const balance = await ctx.turbo.getBalance(ctx.address);
  const solanaBalance = await getBalanceSol({
    endpoint: state.registrationPayment?.endpoint || state.entrySettings?.solanaRpc || undefined,
    address: ctx.address,
  });
  return {
    ...ctx,
    controlledWinc: String(balance.controlledWinc || '0'),
    spendableWinc: String(balance.winc || '0'),
    effectiveWinc: String(balance.effectiveBalance || '0'),
    controlledCredits: creditsFromWinc(balance.controlledWinc || '0'),
    spendableCredits: creditsFromWinc(balance.winc || '0'),
    effectiveCredits: creditsFromWinc(balance.effectiveBalance || '0'),
    solBalance: solanaBalance.sol,
    solLamports: solanaBalance.lamports,
  };
}

export async function estimateTurboUploadPrice({ login, storagePwd, keySource = 'client', byteLength } = {}) {
  const bytes = Number(byteLength);
  if (!Number.isInteger(bytes) || bytes <= 0) {
    throw new Error('Некорректный размер файла для Turbo.');
  }
  const ctx = await getTurboContextForStoredSolanaKey({ login, storagePwd, keySource });
  const rows = await ctx.turbo.getUploadCosts({ bytes: [bytes] });
  const price = Array.isArray(rows) ? rows[0] : null;
  if (!price) {
    throw new Error('Turbo не вернул цену загрузки.');
  }
  const winc = String(price.winc || '0');
  return {
    ...ctx,
    byteLength: bytes,
    isFree: isFreeTurboUploadSize(bytes),
    winc,
    credits: creditsFromWinc(winc),
  };
}

export async function uploadFileWithTurbo({
  login,
  storagePwd,
  keySource = 'client',
  file,
  tags = [],
  shineType = 'attachment',
  onProgress,
} = {}) {
  if (!(file instanceof File)) {
    throw new Error('Выберите файл для загрузки через Turbo.');
  }
  const ctx = await getTurboContextForStoredSolanaKey({ login, storagePwd, keySource });
  const result = await ctx.turbo.uploadFile({
    file,
    dataItemOpts: {
      tags: [
        { name: 'Content-Type', value: String(file.type || 'application/octet-stream') },
        { name: 'App-Name', value: 'SHiNE' },
        { name: 'SHiNE-Type', value: String(shineType || 'attachment') },
        ...((Array.isArray(tags) ? tags : []).filter((item) => item?.name && item?.value)),
      ],
    },
    events: typeof onProgress === 'function'
      ? {
        onProgress: ({ totalBytes, processedBytes, step }) => {
          onProgress({
            totalBytes,
            processedBytes,
            step,
          });
        },
      }
      : undefined,
  });
  return {
    ...ctx,
    id: String(result?.id || '').trim(),
    owner: String(result?.owner || '').trim(),
    winc: String(result?.winc || '0'),
    credits: creditsFromWinc(result?.winc || '0'),
  };
}

export async function topUpTurboWithSolana({
  login,
  storagePwd,
  keySource = 'client',
  amountSol,
  turboCreditDestinationAddress = '',
} = {}) {
  const ctx = await getTurboContextForStoredSolanaKey({ login, storagePwd, keySource });
  const tokenAmount = parseSolToLamports(amountSol);
  const result = await ctx.turbo.topUpWithTokens({
    tokenAmount,
    turboCreditDestinationAddress: String(turboCreditDestinationAddress || '').trim() || undefined,
  });
  return {
    ...ctx,
    amountSol: formatSol(amountSol, 9),
    lamports: tokenAmount,
    txId: String(result?.id || '').trim(),
    target: String(result?.target || '').trim(),
    rewardWinc: String(result?.reward || '0'),
    rewardCredits: creditsFromWinc(result?.reward || '0'),
  };
}