// The decoded details on the transaction detail screen of a token transfer
// (https://git.eeqj.de/sneak/AutistMask/issues/515).
//
// A history row for a token transfer holds the transfer's recipient as its
// `to`, not the contract the transaction was sent to. The screen used to decode
// the transaction's data against that `to`, so its Token line named the
// recipient, and the amount read "decimals unknown" for a token the wallet
// tracks. It decodes against the address the explorer reports the transaction
// was sent to.
//
// The row is the one the real history parser makes from the explorer's answer,
// opened through transactionDetail.show(), which is what a click on the row
// calls. Driven against a minimal DOM stub in the shape
// tests/contractCreation.test.js uses.

const { Interface } = 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 { fetchRecentTransactions } = require("../src/shared/transactions");
const transactionDetail = require("../src/popup/views/transactionDetail");

const EXPLORER = "https://explorer.example/api/v2";
const HOLDER = "0x0000000000000000000000000000000000000a11";
const RECIPIENT = "0x711e691962E5c054b78071C789A0C8CE657377aD";
// A token the wallet tracks and the bundled token list does not name.
const TOKEN = "0x74de5d4FCbf63E00296fd95d33236B9794016631";
const TX_HASH =
    "0x85215772ed26ea8b39c2b3b18779030487efbe0b5fd7e882592b2f62b837be84";

// HOLDER sends 1234.5 of the 6-decimal token to RECIPIENT.
const TRANSFER_DATA = new Interface([
    "function transfer(address to, uint256 amount)",
]).encodeFunctionData("transfer", [RECIPIENT, 1234500000n]);

// The explorer's answers: the transfer in HOLDER's token transfers, and the
// transaction itself, sent to the token contract.
function mockExplorerAnswer(url) {
    if (
        url ===
        EXPLORER + "/addresses/" + HOLDER + "/token-transfers?type=ERC-20"
    ) {
        return {
            items: [
                {
                    transaction_hash: TX_HASH,
                    block_number: 100,
                    timestamp: "2026-10-01T00:00:00Z",
                    from: { hash: HOLDER },
                    to: { hash: RECIPIENT },
                    total: { value: "1234500000", decimals: "6" },
                    token: {
                        address_hash: TOKEN,
                        symbol: "TDOL",
                        holders_count: "5000",
                    },
                },
            ],
        };
    }
    if (url === EXPLORER + "/transactions/" + TX_HASH) {
        return { to: { hash: TOKEN }, raw_input: TRANSFER_DATA };
    }
    return { items: [] };
}

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, non-testnet 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);
}

// One line of the decoded details: its label and what is drawn under it.
function decodedLine(label) {
    return node("tx-detail-calldata-details")
        .innerHTML.split('<div class="mb-2">')
        .find((line) =>
            line.startsWith(`<div class="text-muted">${label}</div>`),
        );
}

beforeEach(() => {
    globalThis.document = makeDocument();
    globalThis.window = { location: { search: "" } };
    state.blockscoutUrl = EXPLORER;
    state.wallets = [
        {
            name: "Main",
            type: "key",
            addresses: [{ address: HOLDER, balance: "0.0000" }],
        },
    ];
    state.trackedTokens = [{ address: TOKEN, symbol: "TDOL", decimals: 6 }];
    state.viewData = {};
    state.viewStack = [];
    state.currentView = null;
});

test("a token transfer's decoded details name the token contract and the amount at its scale", async () => {
    const [row] = await fetchRecentTransactions(HOLDER, EXPLORER, 1);
    expect(row.to).toBe(RECIPIENT);
    expect(row.contractAddress).toBe(TOKEN.toLowerCase());

    transactionDetail.show(row);
    // The decoded details are drawn once the explorer has answered.
    for (let i = 0; i < 10; i++) await new Promise((r) => setTimeout(r, 0));

    expect(node("tx-detail-calldata-action").textContent).toBe(
        "Token Transfer",
    );
    const token = decodedLine("Token");
    expect(token).toContain('<div class="font-bold">TDOL</div>');
    expect(token).toContain(TOKEN);
    expect(token).not.toContain(RECIPIENT);
    expect(decodedLine("Recipient")).toContain(RECIPIENT);
    expect(decodedLine("Amount")).toContain(
        '<div class="font-bold">1234.5000 TDOL</div>',
    );
});