// Which transactions are shown as a swap through the Uniswap Universal Router
// (https://git.eeqj.de/sneak/AutistMask/issues/520).
//
// The decoder used to recognise the router's execute() call by its selector
// alone, so the same calldata sent to an ordinary address was shown as a swap
// through the router, with that address as its Protocol. It is now decoded
// only when the transaction is sent to a Universal Router deployment on the
// network it is for; anywhere else it is left to the raw data.
//
// The transaction detail screen and the approval screen are driven against a
// minimal DOM stub in the shape tests/tokenTransferDetail.test.js uses, the
// approval screen opened the way tests/swapStatusAmount.test.js opens it.

const { AbiCoder, Interface, getAddress, solidityPacked } = require("ethers");

jest.mock("../src/shared/log", () => ({
    log: {
        debugf: () => {},
        infof: () => {},
        warnf: () => {},
        errorf: () => {},
    },
    debugFetch: async (url) => ({
        ok: true,
        json: async () => mockExplorerAnswer(url),
    }),
    setRuntimeDebug: () => {},
    isDebug: () => false,
}));

globalThis.chrome = {
    storage: { local: { get: async () => ({}), set: async () => {} } },
};

const { state } = require("../src/shared/state");
const approval = require("../src/popup/views/approval");
const { decodeCalldata } = approval;
const transactionDetail = require("../src/popup/views/transactionDetail");

const MAINNET = "0x1";
const SEPOLIA = "0xaa36a7";

// From Uniswap's deployment files: one router on Ethereum Mainnet only, one on
// Sepolia only, and one at the same address on both.
const MAINNET_ROUTER = "0x66a9893cc07d91d95644aedd05d03f95e1dba8af";
const SEPOLIA_ROUTER = "0x3a9d48ab9751398bbfa63ad67599bb04e4bdf98b";
const ROUTER_ON_BOTH = "0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD";
// The address with no code from the issue.
const ORDINARY = "0x0b0050Da68435b3EcBC236c40F16dB2070bCD79A";

const RECIPIENT = "0xC0FfEE0000000000000000000000000000c0fFEe";
const SEPOLIA_WETH = "0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14";
const TOKEN = "0xE2E0000000000000000000000000000000000E2e";
const HUNDREDTH_ETH = 10000000000000000n;

const coder = AbiCoder.defaultAbiCoder();
const routerIface = new Interface([
    "function execute(bytes commands, bytes[] inputs, uint256 deadline)",
]);

// The calldata from the issue: wrap 0.01 ETH, then a V3 swap of it into a
// token.
const SWAP_DATA = routerIface.encodeFunctionData("execute", [
    solidityPacked(["uint8", "uint8"], [0x0b, 0x00]),
    [
        coder.encode(["address", "uint256"], [RECIPIENT, HUNDREDTH_ETH]),
        coder.encode(
            ["address", "uint256", "uint256", "bytes", "bool"],
            [
                RECIPIENT,
                HUNDREDTH_ETH,
                1n,
                solidityPacked(
                    ["address", "uint24", "address"],
                    [SEPOLIA_WETH, 3000, TOKEN],
                ),
                false,
            ],
        ),
    ],
    9999999999n,
]);

beforeEach(() => {
    state.trackedTokens = [];
    state.wallets = [];
});

describe("execute() calldata on the approval screen's decoder", () => {
    test("sent to a router on the transaction's network, it is a swap", () => {
        const onMainnet = decodeCalldata(SWAP_DATA, MAINNET_ROUTER, MAINNET);
        expect(onMainnet.description).toBe("Swap via Uniswap Universal Router");
        expect(onMainnet.details[0]).toMatchObject({
            label: "Protocol",
            address: MAINNET_ROUTER,
        });
        expect(
            decodeCalldata(SWAP_DATA, SEPOLIA_ROUTER, SEPOLIA).description,
        ).toBe("Swap via Uniswap Universal Router");
    });

    test("sent to an ordinary address, it is not decoded", () => {
        expect(decodeCalldata(SWAP_DATA, ORDINARY, MAINNET)).toBeNull();
        expect(decodeCalldata(SWAP_DATA, ORDINARY, SEPOLIA)).toBeNull();
    });

    test("sent to a router of the other network only, it is not decoded", () => {
        expect(decodeCalldata(SWAP_DATA, SEPOLIA_ROUTER, MAINNET)).toBeNull();
        expect(decodeCalldata(SWAP_DATA, MAINNET_ROUTER, SEPOLIA)).toBeNull();
    });

    test("a router deployed at the same address on both networks is one on each", () => {
        expect(
            decodeCalldata(SWAP_DATA, ROUTER_ON_BOTH, MAINNET),
        ).not.toBeNull();
        expect(
            decodeCalldata(SWAP_DATA, ROUTER_ON_BOTH, SEPOLIA),
        ).not.toBeNull();
    });

    test("the router address matches in any letter case", () => {
        const upper = "0x" + MAINNET_ROUTER.slice(2).toUpperCase();
        for (const address of [getAddress(MAINNET_ROUTER), upper]) {
            expect(decodeCalldata(SWAP_DATA, address, MAINNET)).not.toBeNull();
        }
    });
});

// The transaction the explorer reports: SWAP_DATA, sent to `mockSentTo`.
const TX_HASH = "0x" + "5".repeat(64);
let mockSentTo = null;

function mockExplorerAnswer(url) {
    if (url.endsWith("/transactions/" + TX_HASH)) {
        return {
            to: { hash: mockSentTo },
            raw_input: SWAP_DATA,
            method: "execute",
        };
    }
    return {};
}

function makeElement(id) {
    const classes = new Set();
    const el = {
        id,
        textContent: "",
        value: "",
        innerHTML: "",
        style: {},
        dataset: {},
        classList: {
            add: (...names) => names.forEach((n) => classes.add(n)),
            remove: (...names) => names.forEach((n) => classes.delete(n)),
            contains: (n) => classes.has(n),
            toggle: () => false,
        },
        addEventListener: () => {},
        querySelectorAll: () => [],
        appendChild: () => {},
    };
    // Views reach for .parentElement to hide whole sections.
    Object.defineProperty(el, "parentElement", {
        get: () => node(id + "-parent"),
    });
    return el;
}

function makeDocument() {
    const els = new Map();
    return {
        getElementById(id) {
            // The debug banner is created on demand by helpers.js; absent
            // is the state a non-debug popup is in.
            if (id === "debug-banner") return null;
            if (!els.has(id)) els.set(id, makeElement(id));
            return els.get(id);
        },
        createElement: () => makeElement("created"),
        body: { prepend: () => {} },
    };
}

function node(id) {
    return globalThis.document.getElementById(id);
}

// Open the transaction detail screen with Sepolia active, for the
// transaction the explorer reports sent to `sentTo`, and wait for its
// decoded details.
async function showDetailSentTo(sentTo) {
    mockSentTo = sentTo;
    globalThis.document = makeDocument();
    globalThis.window = { location: { search: "" } };
    state.networkId = "sepolia";
    state.blockscoutUrl = "https://explorer.example/api/v2";
    state.viewData = {};
    state.viewStack = [];
    state.currentView = null;
    transactionDetail.show({
        hash: TX_HASH,
        from: RECIPIENT,
        to: sentTo,
        value: "",
        symbol: "SepoliaETH",
        timestamp: 1790000000,
        isError: false,
        direction: "contract",
        directionLabel: "Swap",
        method: "execute",
        chainId: SEPOLIA,
    });
    for (let i = 0; i < 10; i++) await new Promise((r) => setTimeout(r, 0));
}

describe("execute() calldata on the transaction detail screen", () => {
    test("sent to a router on the active network, it is a swap", async () => {
        await showDetailSentTo(SEPOLIA_ROUTER);
        expect(node("tx-detail-calldata-details").innerHTML).toContain(
            "Swap via Uniswap Universal Router",
        );
    });

    test("sent to an ordinary address, it is not decoded", async () => {
        await showDetailSentTo(ORDINARY);
        expect(node("tx-detail-calldata-action").textContent).toBe("execute");
        expect(node("tx-detail-calldata-details").innerHTML).toBe("");
        expect(node("tx-detail-rawdata").innerHTML).toContain(SWAP_DATA);
    });

    test("sent to a router of the other network only, it is not decoded", async () => {
        await showDetailSentTo(MAINNET_ROUTER);
        expect(node("tx-detail-calldata-action").textContent).toBe("execute");
        expect(node("tx-detail-calldata-details").innerHTML).toBe("");
        expect(node("tx-detail-rawdata").innerHTML).toContain(SWAP_DATA);
    });
});

// Open the approval screen with Ethereum Mainnet active, for a site's Sepolia
// transaction that sends SWAP_DATA to `sentTo`.
async function showApprovalSentTo(sentTo) {
    globalThis.document = makeDocument();
    globalThis.window = { location: { search: "" }, close: () => {} };
    globalThis.chrome.runtime = {
        connect: () => ({ postMessage: () => {} }),
        sendMessage: (_msg, reply) =>
            reply({
                type: "tx",
                origin: "https://dapp.example",
                isPhishingDomain: false,
                approvedFrom: RECIPIENT,
                approvedTx: {
                    type: 2,
                    from: RECIPIENT,
                    chainId: SEPOLIA,
                    nonce: "0x7",
                    gasLimit: "0x30d40",
                    maxPriorityFeePerGas: "0x3b9aca00",
                    maxFeePerGas: "0x77359400",
                    to: sentTo,
                    value: "0x" + HUNDREDTH_ETH.toString(16),
                    data: SWAP_DATA,
                    accessList: [],
                },
            }),
    };
    state.networkId = "mainnet";
    state.currentView = null;
    await approval.show(1);
}

// The router is on Sepolia's list only, so the swap is shown only if the
// screen decodes for the transaction's network: on Ethereum Mainnet, the
// active network, that address is not a router.
describe("execute() calldata on the approval screen, for a Sepolia transaction while Ethereum Mainnet is active", () => {
    test("sent to a router on Sepolia, it is a swap", async () => {
        await showApprovalSentTo(SEPOLIA_ROUTER);
        expect(node("approve-tx-decoded").classList.contains("hidden")).toBe(
            false,
        );
        expect(node("approve-tx-decoded-details").innerHTML).toContain(
            "Swap via Uniswap Universal Router",
        );
    });

    test("sent to an ordinary address, it is shown as raw data", async () => {
        await showApprovalSentTo(ORDINARY);
        expect(node("approve-tx-decoded").classList.contains("hidden")).toBe(
            true,
        );
        expect(node("approve-tx-decoded-details").innerHTML).toBe("");
        expect(node("approve-tx-data").textContent).toBe(SWAP_DATA);
        expect(
            node("approve-tx-data-section").classList.contains("hidden"),
        ).toBe(false);
    });
});