const { expect } = require("chai");
const { ethers } = require("hardhat");

describe("EdutOfferEntitlement", function () {
  const PRICE = ethers.BigNumber.from("1000000000"); // 1000 USDC (6 decimals)
  const OFFER_WORKSPACE_CORE = "edut.workspace.core";
  const OFFER_WORKSPACE_LANE24 = "edut.workspace.lane24";

  async function expectRevertWithCustomError(promise, errorName) {
    try {
      await promise;
      expect.fail(`expected revert ${errorName}`);
    } catch (err) {
      expect(String(err)).to.contain(errorName);
    }
  }

  async function deployFixture() {
    const [deployer, treasury, ownerWallet, payer, other] = await ethers.getSigners();

    const tokenFactory = await ethers.getContractFactory("MockERC20");
    const usdc = await tokenFactory.connect(deployer).deploy("Mock USDC", "USDC", 6);
    await usdc.deployed();

    const membershipFactory = await ethers.getContractFactory("MockMembershipStatus");
    const membership = await membershipFactory.connect(deployer).deploy();
    await membership.deployed();

    const registryFactory = await ethers.getContractFactory("EdutOfferEntitlement");
    const registry = await registryFactory
      .connect(deployer)
      .deploy(treasury.address, usdc.address, membership.address);
    await registry.deployed();

    return { deployer, treasury, ownerWallet, payer, other, usdc, membership, registry };
  }

  it("requires owner role to configure offers", async function () {
    const { registry, other } = await deployFixture();
    await expectRevertWithCustomError(
      registry.connect(other).upsertOffer(OFFER_WORKSPACE_CORE, PRICE, true, true),
      "NotOwner",
    );
  });

  it("blocks purchase when membership-required offer has no active membership", async function () {
    const { registry, ownerWallet, payer, usdc } = await deployFixture();
    await (await registry.upsertOffer(OFFER_WORKSPACE_CORE, PRICE, true, true)).wait();
    await (await usdc.mint(payer.address, PRICE)).wait();
    await (await usdc.connect(payer).approve(registry.address, PRICE)).wait();

    await expectRevertWithCustomError(
      registry.connect(payer).purchaseEntitlement(
        OFFER_WORKSPACE_CORE,
        ownerWallet.address,
        ethers.utils.formatBytes32String("org_root_a"),
        ethers.utils.formatBytes32String("workspace_a"),
      ),
      "MembershipRequired",
    );
  });

  it("mints entitlement and settles USDC to treasury", async function () {
    const { registry, membership, ownerWallet, payer, treasury, usdc } = await deployFixture();
    await (await registry.upsertOffer(OFFER_WORKSPACE_CORE, PRICE, true, true)).wait();
    await (await membership.setMembership(ownerWallet.address, true)).wait();
    await (await usdc.mint(payer.address, PRICE)).wait();
    await (await usdc.connect(payer).approve(registry.address, PRICE)).wait();

    const tx = await registry.connect(payer).purchaseEntitlement(
      OFFER_WORKSPACE_CORE,
      ownerWallet.address,
      ethers.utils.formatBytes32String("org_root_a"),
      ethers.utils.formatBytes32String("workspace_a"),
    );
    await tx.wait();

    expect((await usdc.balanceOf(treasury.address)).eq(PRICE)).to.equal(true);
    const entitlement = await registry.entitlementById(1);
    expect(entitlement.ownerWallet).to.equal(ownerWallet.address);
    expect(entitlement.payerWallet).to.equal(payer.address);
    expect(Number(entitlement.state)).to.equal(1);
  });

  it("supports repeated lane purchases with deterministic incremental ids", async function () {
    const { registry, membership, ownerWallet, payer, usdc } = await deployFixture();
    await (await registry.upsertOffer(OFFER_WORKSPACE_LANE24, PRICE, true, true)).wait();
    await (await membership.setMembership(ownerWallet.address, true)).wait();

    const total = PRICE.mul(2);
    await (await usdc.mint(payer.address, total)).wait();
    await (await usdc.connect(payer).approve(registry.address, total)).wait();

    await (
      await registry.connect(payer).purchaseEntitlement(
        OFFER_WORKSPACE_LANE24,
        ownerWallet.address,
        ethers.utils.formatBytes32String("org_root_a"),
        ethers.utils.formatBytes32String("workspace_a"),
      )
    ).wait();
    await (
      await registry.connect(payer).purchaseEntitlement(
        OFFER_WORKSPACE_LANE24,
        ownerWallet.address,
        ethers.utils.formatBytes32String("org_root_a"),
        ethers.utils.formatBytes32String("workspace_a"),
      )
    ).wait();

    const first = await registry.entitlementById(1);
    const second = await registry.entitlementById(2);
    expect(Number(first.state)).to.equal(1);
    expect(Number(second.state)).to.equal(1);
    expect((await registry.nextEntitlementId()).eq(3)).to.equal(true);
  });

  it("allows owner to update entitlement state", async function () {
    const { registry, membership, ownerWallet, payer, usdc } = await deployFixture();
    await (await registry.upsertOffer(OFFER_WORKSPACE_CORE, PRICE, true, true)).wait();
    await (await membership.setMembership(ownerWallet.address, true)).wait();
    await (await usdc.mint(payer.address, PRICE)).wait();
    await (await usdc.connect(payer).approve(registry.address, PRICE)).wait();
    await (
      await registry.connect(payer).purchaseEntitlement(
        OFFER_WORKSPACE_CORE,
        ownerWallet.address,
        ethers.utils.formatBytes32String("org_root_a"),
        ethers.utils.formatBytes32String("workspace_a"),
      )
    ).wait();

    await (await registry.setEntitlementState(1, 2)).wait();
    const entitlement = await registry.entitlementById(1);
    expect(Number(entitlement.state)).to.equal(2);
  });
});