import { PublicKey } from "@solana/web3.js";
import { getMint } from "@solana/spl-token";
import { Program } from "@anchor-lang/core";
import { loadConfig, loadKeypair, SIDE_UP } from "./config";
import { getPrice } from "./priceSource";
import { nextBetRequest } from "./frontStub";
import {
  initialize,
  createBet,
  closeBet,
  readGlobal,
  ensureVaultFunded,
  ensureBettorTokenAccount,
  fundBettor,
} from "./ops";
import { betPda } from "./pda";
import { makeConnection, makeProgram } from "./program";

import type { SmartUpdown } from "../idl/smart_updown";

const sleep = (ms: number) => new Promise((r) => setTimeout(r, ms));

const STATUS_OPEN = 0;

/** Человекочитаемо-формат: токен-юниты -> "N.NNNNNN" по decimals. */
function humanize(units: string | number | bigint, decimals: number): string {
  const n = BigInt(units);
  const sign = n < 0n ? "-" : "";
  const abs = n < 0n ? -n : n;
  const pow = 10n ** BigInt(decimals);
  return `${sign}${abs / pow}.${(abs % pow).toString().padStart(decimals, "0")}`;
}

/** Закрывает ставку, повторяя при «equal price» (exit==entry) пока не зафиналится. */
async function settleBet(
  program: Program<SmartUpdown>,
  id: any,
  entryPrice: number,
  relayer: any,
  bettor: PublicKey,
  mint: PublicKey
): Promise<void> {
  for (let attempt = 1; ; attempt++) {
    const exitPrice = await getPrice();
    if (exitPrice === entryPrice) {
      console.log(`attempt ${attempt}: exit==entry (${exitPrice}), жду движение...`);
      await sleep(2000);
      continue;
    }
    const sig = await closeBet(program, id, exitPrice, relayer, bettor, mint);
    console.log(`close_bet #${id} exit=${exitPrice} (attempt ${attempt}) tx=${sig}`);

    const status = await getStatus(program, id);
    if (status === STATUS_OPEN) {
      console.log(`ставка ещё open (equal price), повторяю close...`);
      await sleep(2000);
      continue;
    }
    return;
  }
}

async function getStatus(program: Program<SmartUpdown>, id: any): Promise<number> {
  const bet = await program.account.bet.fetchNullable(betPda(program.programId, id));
  return bet ? bet.status.toNumber() : -1;
}

async function main(): Promise<void> {
  const cfg = loadConfig();
  const admin = loadKeypair(cfg.adminKeypairPath);
  const connection = makeConnection(cfg.rpcUrl);
  const program = makeProgram(connection, admin);

  console.log(`RPC: ${cfg.rpcUrl}`);
  console.log(`Admin/relayer: ${admin.publicKey.toBase58()}`);
  console.log(`Token mint: ${cfg.tokenMint.toBase58()}`);

  // Decimals фантиков (см. state.rs = 6). Только для человекочитаемых логов.
  let decimals = 6;
  try {
    decimals = (await getMint(connection, cfg.tokenMint)).decimals;
  } catch {
    // mint ещё не создан (плейсхолдер) — дефолт из ТЗ контракта
  }

  const global = await readGlobal(program, program.programId, cfg.tokenMint);
  if (!global) {
    if (!process.argv.includes("--init")) {
      throw new Error(
        "Контракт не инициализирован. Запусти с флагом --init (или init+run)."
      );
    }
    await initialize(program, {
      minAmount: cfg.minAmount,
      maxAmount: cfg.maxAmount,
      multiplierBps: cfg.multiplierBps,
      expirySeconds: cfg.expirySeconds,
    }, admin);
    console.log("Контракт инициализирован.");
  } else {
    console.log(
      `Global: counter=${global.counter} vault=${humanize(global.vaultBalance, decimals)} fant ` +
        `expiry=${global.expirySeconds}s paused=${global.paused}`
    );
  }

  if (cfg.allowAirdrop) {
    await ensureVaultFunded(connection, program, admin, cfg);
  }

  const loops = process.argv.includes("--once") ? 1 : Infinity;
  let n = 0;

  while (n < loops) {
    n++;
    const req = nextBetRequest(cfg.minAmount, cfg.maxAmount);
    await fundBettor(connection, req.bettor.publicKey);
    // Беттору нужен токен-аккаунт (ATA) — без него create_bet не пройдёт.
    // На localnet (allowAirdrop) после создания ATA наливает фантики (аналог SOL-airdrop).
    await ensureBettorTokenAccount(
      connection,
      admin,
      cfg.tokenMint,
      req.bettor.publicKey,
      cfg.allowAirdrop ? BigInt(cfg.startBalance) : undefined
    );

    const entryPrice = await getPrice();
    await createBet(program, cfg.tokenMint, req.bettor, {
      side: req.side,
      amount: req.amount,
      entryPrice,
    });

    console.log(
      `ставка ${req.side === SIDE_UP ? "UP" : "DOWN"} на ${humanize(req.amount, decimals)} fant, жду ${cfg.expirySeconds}s...`
    );
    await sleep((cfg.expirySeconds + 1) * 1000);

    const g0 = await readGlobal(program, program.programId, cfg.tokenMint);
    const id = g0!.counter.subn(1);
    await settleBet(program, id, entryPrice, admin, req.bettor.publicKey, cfg.tokenMint);

    const outcome = await program.account.bet.fetchNullable(betPda(program.programId, id));
    console.log(
      outcome!.status.toNumber() === 1
        ? `>> результат #${id}: ПОЛЬЗОВАТЕЛЬ ВЫИГРАЛ (payout 1.3x)`
        : `>> результат #${id}: ВЫИГРАЛ ДОМ (user lost)`
    );
  }
  console.log("Готово.");
}

main().catch((e) => {
  console.error(e);
  process.exit(1);
});