/**
 * End-to-end round-trip against a real EVM node.
 *
 * Spawns the ganache CLI as a child process on a random dev port,
 * deploys NotaryRegistry.sol compiled via in-process solc, and
 * exercises services/notaryChain.ts (`anchorPlan` + `finalizeAnchor`)
 * against it via ethers v6. This closes the
 * orchestrator-unit-tests-pass-but-the-adapter-to-reality-boundary-
 * is-uncovered gap flagged in gap-analysis v2 §7.9 / §8.5 — PR Q's
 * existing suite covers Postgres only.
 *
 * Gated on RUN_E2E=1 to stay out of the fast unit-test path. Runs on
 * CI via the `orchestrator-e2e` job (see .github/workflows/ci.yml).
 */

import { spawn, type ChildProcess } from "child_process";
import { JsonRpcProvider, Wallet, ContractFactory, Contract } from "ethers";
import { compileNotaryRegistry } from "./helpers/compileNotaryRegistry";

const RUN_E2E = process.env.RUN_E2E === "1";
const d = RUN_E2E ? describe : describe.skip;

const DEPLOYER_PK = "0x4f3edf983ac636a65a842ce7c78d9aa706d3b113bce9c46f30d7d21715b23b1d";

async function waitForRpc(url: string, timeoutMs = 30_000): Promise<void> {
  const start = Date.now();
  while (Date.now() - start < timeoutMs) {
    try {
      const r = await fetch(url, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ jsonrpc: "2.0", method: "eth_chainId", params: [], id: 1 }),
      });
      if (r.ok) return;
    } catch {
      /* not ready yet */
    }
    await new Promise((r) => setTimeout(r, 300));
  }
  throw new Error(`RPC did not come up within ${timeoutMs}ms: ${url}`);
}

// eslint-disable-next-line @typescript-eslint/no-explicit-any
type NotaryChainModule = typeof import("../../src/services/notaryChain");

d("NotaryRegistry chain round-trip (E2E)", () => {
  let ganacheProc: ChildProcess;
  let port: number;
  let rpcUrl: string;
  let contractAddress: string;
  let chain: NotaryChainModule;

  beforeAll(async () => {
    port = 18545 + Math.floor(Math.random() * 1000);
    rpcUrl = `http://127.0.0.1:${port}`;

    ganacheProc = spawn(
      "node_modules/.bin/ganache",
      [
        "--port",
        String(port),
        "--chain.chainId",
        "1337",
        "--wallet.accounts",
        `${DEPLOYER_PK},1000000000000000000000`,
        "--logging.quiet",
      ],
      { stdio: "pipe", cwd: process.cwd() },
    );

    await waitForRpc(rpcUrl);

    const provider = new JsonRpcProvider(rpcUrl);
    const wallet = new Wallet(DEPLOYER_PK, provider);
    const { abi, bytecode } = compileNotaryRegistry();

    // OZ v5 Ownable requires `initialOwner` in the constructor.
    const factory = new ContractFactory(abi, bytecode, wallet);
    const deployer = await wallet.getAddress();
    const contract = (await factory.deploy(deployer)) as unknown as Contract;
    await contract.waitForDeployment();
    contractAddress = await contract.getAddress();

    // Wire the service under test to this chain. Import after the env
    // is set so the service's lazy loader picks it up.
    process.env.CHAIN_138_RPC_URL = rpcUrl;
    process.env.CHAIN_138_CHAIN_ID = "1337";
    process.env.NOTARY_REGISTRY_ADDRESS = contractAddress;
    process.env.ORCHESTRATOR_PRIVATE_KEY = DEPLOYER_PK;

    jest.resetModules();
    chain = await import("../../src/services/notaryChain");
  }, 120_000);

  afterAll(async () => {
    if (ganacheProc && !ganacheProc.killed) {
      ganacheProc.kill("SIGTERM");
      await new Promise((r) => setTimeout(r, 300));
    }
    delete process.env.CHAIN_138_RPC_URL;
    delete process.env.CHAIN_138_CHAIN_ID;
    delete process.env.NOTARY_REGISTRY_ADDRESS;
    delete process.env.ORCHESTRATOR_PRIVATE_KEY;
  });

  it("anchorPlan writes a PlanRegistered record on-chain", async () => {
    const plan = {
      plan_id: "e2e-plan-" + Date.now(),
      steps: [],
      created_at: new Date().toISOString(),
    };
    const expectedHash = chain.computePlanHash(plan as never);
    const result = await chain.anchorPlan(plan as never);

    expect(result.mode).toBe("chain");
    expect(result.txHash).toMatch(/^0x[0-9a-fA-F]{64}$/);
    expect(result.blockNumber).toBeGreaterThan(0);
    expect(result.planHash).toBe(expectedHash);

    // Directly query the contract to prove the state transition landed.
    const provider = new JsonRpcProvider(rpcUrl);
    const { abi } = compileNotaryRegistry();
    const readOnly = new Contract(contractAddress, abi, provider);
    const stored = await readOnly.getFunction("plans")(chain.planIdToBytes32(plan.plan_id));
    // plans(bytes32) → (planHash, creator, registeredAt, finalizedAt, success, receiptHash)
    expect(stored[0]).toMatch(/^0x[0-9a-fA-F]{64}$/);
    expect(Number(stored[2])).toBeGreaterThan(0); // registeredAt
    expect(Number(stored[3])).toBe(0); // finalizedAt
  }, 60_000);

  it("finalizeAnchor writes a PlanFinalized record with a receipt hash", async () => {
    const plan = {
      plan_id: "e2e-finalize-" + Date.now(),
      steps: [],
      created_at: new Date().toISOString(),
    };
    await chain.anchorPlan(plan as never);
    const result = await chain.finalizeAnchor(plan.plan_id, true);

    expect(result.mode).toBe("chain");
    expect(result.txHash).toMatch(/^0x[0-9a-fA-F]{64}$/);
    expect(result.receiptHash).toMatch(/^0x[0-9a-fA-F]{64}$/);
    expect(result.blockNumber).toBeGreaterThan(0);
  }, 60_000);

  it("anchorPlan falls back to mock when envs are cleared", async () => {
    const saved = {
      rpc: process.env.CHAIN_138_RPC_URL,
      addr: process.env.NOTARY_REGISTRY_ADDRESS,
      pk: process.env.ORCHESTRATOR_PRIVATE_KEY,
    };
    delete process.env.CHAIN_138_RPC_URL;
    delete process.env.NOTARY_REGISTRY_ADDRESS;
    delete process.env.ORCHESTRATOR_PRIVATE_KEY;

    try {
      jest.resetModules();
      const mockOnly = await import("../../src/services/notaryChain");
      const result = await mockOnly.anchorPlan({
        plan_id: "mock-plan",
        steps: [],
        created_at: new Date().toISOString(),
      } as never);
      expect(result.mode).toBe("mock");
      expect(result.txHash).toBeUndefined();
      expect(result.planHash).toMatch(/^0x[0-9a-fA-F]{64}$/);
    } finally {
      if (saved.rpc) process.env.CHAIN_138_RPC_URL = saved.rpc;
      if (saved.addr) process.env.NOTARY_REGISTRY_ADDRESS = saved.addr;
      if (saved.pk) process.env.ORCHESTRATOR_PRIVATE_KEY = saved.pk;
    }
  });
});