import { expect } from "chai";
import { ethers } from "hardhat";
import { {{CONTRACT_NAME}} } from "../typechain-types";
import { HardhatEthersSigner } from "@nomicfoundation/hardhat-ethers/signers";
import { time } from "@nomicfoundation/hardhat-network-helpers";

describe("{{CONTRACT_NAME}}", function () {
  let auction: {{CONTRACT_NAME}};
  let owner: HardhatEthersSigner;
  let bidder1: HardhatEthersSigner;
  let bidder2: HardhatEthersSigner;
  let bidder3: HardhatEthersSigner;

  const ITEM_DESCRIPTION = "Rare Digital Art NFT";
  const DURATION = 86400; // 1 day

  beforeEach(async function () {
    [owner, bidder1, bidder2, bidder3] = await ethers.getSigners();

    const AuctionFactory = await ethers.getContractFactory("{{CONTRACT_NAME}}");
    auction = await AuctionFactory.deploy(ITEM_DESCRIPTION, DURATION);
    await auction.waitForDeployment();
  });

  describe("Deployment", function () {
    it("Should set the correct item description", async function () {
      expect(await auction.itemDescription()).to.equal(ITEM_DESCRIPTION);
    });

    it("Should set the correct end time", async function () {
      const endTime = await auction.auctionEndTime();
      const now = Math.floor(Date.now() / 1000);
      expect(endTime).to.be.closeTo(now + DURATION, 10);
    });

    it("Should start with zero bidders", async function () {
      expect(await auction.bidderCount()).to.equal(0);
    });

    it("Should not be finalized initially", async function () {
      expect(await auction.isFinalized()).to.equal(false);
    });

    it("Should not be revealed initially", async function () {
      expect(await auction.isRevealed()).to.equal(false);
    });

    it("Should not have reveal requested initially", async function () {
      expect(await auction.isRevealRequested()).to.equal(false);
    });
  });

  describe("Bidding", function () {
    it("Should track bidder count", async function () {
      // Actual bidding requires fhevmjs encrypted inputs
      expect(await auction.bidderCount()).to.equal(0);
    });

    it("Should track if address has bid", async function () {
      expect(await auction.hasBid(bidder1.address)).to.equal(false);
    });
  });

  describe("Winner Reveal (Public Decryption)", function () {
    it("Should reject reveal before auction ends", async function () {
      await expect(auction.requestWinnerReveal())
        .to.be.revertedWithCustomError(auction, "AuctionNotEnded");
    });

    it("Should reject reveal with no bids", async function () {
      // Fast forward past auction end
      await time.increase(DURATION + 1);

      await expect(auction.requestWinnerReveal())
        .to.be.revertedWithCustomError(auction, "NoBids");
    });

    it("Should reject getWinner before reveal", async function () {
      await time.increase(DURATION + 1);

      await expect(auction.getWinner())
        .to.be.revertedWithCustomError(auction, "RevealNotRequested");
    });

    it("Should reject finalize without reveal request", async function () {
      await time.increase(DURATION + 1);

      const fakeProof = "0x";
      await expect(auction.finalizeWinnerReveal(bidder1.address, fakeProof))
        .to.be.revertedWithCustomError(auction, "RevealNotRequested");
    });
  });

  describe("Auction Finalization", function () {
    it("Should reject finalize before reveal", async function () {
      await time.increase(DURATION + 1);

      await expect(auction.finalizeAuction())
        .to.be.revertedWithCustomError(auction, "RevealNotRequested");
    });
  });

  describe("View Functions", function () {
    it("Should return correct auction info", async function () {
      expect(await auction.itemDescription()).to.equal(ITEM_DESCRIPTION);
      expect(await auction.bidderCount()).to.equal(0);
      expect(await auction.isFinalized()).to.equal(false);
    });
  });

  describe("Public Decryption Flow", function () {
    it("Documents the complete 3-step async decryption flow", async function () {
      /**
       * Complete Public Decryption Flow for Sealed Bid Auction:
       *
       * BIDDING PHASE
       * =============
       * // Each bidder submits encrypted bid
       * const encryptedBid = await fhevmInstance.encrypt64(bidAmount);
       * await auction.bid(encryptedBid.data, encryptedBid.proof);
       *
       * STEP 1 - On-chain: Request Winner Reveal
       * ========================================
       * // After auction ends
       * await auction.requestWinnerReveal();
       * // Internally calls: FHE.makePubliclyDecryptable(_highestBidder)
       * // Emits: WinnerReadyForReveal event
       *
       * STEP 2 - Off-chain: Decrypt via Relayer SDK
       * ============================================
       * const handle = await auction.getWinnerHandle();
       * const result = await fhevmInstance.publicDecrypt([handle]);
       * const winnerAddress = result.clearValues[handle];
       * const proof = result.decryptionProof;
       *
       * STEP 3 - On-chain: Finalize with Proof
       * ======================================
       * await auction.finalizeWinnerReveal(winnerAddress, proof);
       * // Internally calls: FHE.checkSignatures(cts, cleartexts, proof)
       * // Stores winner address
       * // Emits: WinnerRevealed(winnerAddress)
       *
       * FINALIZE AUCTION
       * ================
       * await auction.finalizeAuction();
       * // Emits: AuctionFinalized(winner)
       */
    });
  });

  describe("Privacy Guarantees", function () {
    it("Should keep bid amounts encrypted", async function () {
      /**
       * Privacy guarantees:
       * - All bid amounts are encrypted (euint64)
       * - Only bidder can see their own bid
       * - Highest bid comparison happens on encrypted values
       * - Only winner address is revealed, not bid amounts
       */
    });

    it("Should protect against bid manipulation", async function () {
      /**
       * Security guarantees:
       * - Bids cannot be changed after submission
       * - No one can see other bids during auction
       * - Winner determined by encrypted comparison
       * - Decryption proof ensures correct winner
       */
    });
  });

  describe("Security", function () {
    it("Should verify decryption proofs", async function () {
      /**
       * Security guarantees:
       * - FHE.checkSignatures verifies Zama KMS proof
       * - Cannot submit fake winner address
       * - Proof cryptographically bound to ciphertext
       * - Transaction reverts if proof is invalid
       */
    });
  });
});