// Tests for the stored-state half of the non-master extended key problem.
//
// Refusing a non-master xprv at import time does nothing for a wallet that is
// already in storage: the import that created it ran before the refusal
// existed. Such a wallet used to sign for the wrong tree and now throws on the
// send screen instead. These tests pin down that it is named and explained in
// the wallet list, that every control leading to a signature or to the private
// key refuses it before asking for a password, that nothing on the way there
// throws, and that a wallet imported from a real master key is untouched by
// any of it.

// Mocked so that no password has to be hashed: the controls below are checked
// for whether they decrypt at all.
jest.mock("../src/shared/vault", () => ({
    decryptWithPassword: jest.fn(),
}));

const { HDNodeWallet, Mnemonic } = require("ethers");

const wallet = require("../src/shared/wallet");
const {
    walletDefect,
    walletDefectHtml,
    NON_MASTER_XPRV,
} = require("../src/shared/walletDefects");

// BIP-39 test vector phrase, published; never used for real funds.
const VECTOR_PHRASE =
    "test test test test test test test test test test test junk";

function seedNode(phrase) {
    return HDNodeWallet.fromSeed(Mnemonic.fromPhrase(phrase, "").computeSeed());
}

// The master (depth-0) key, which is what the import flow accepts today.
function masterXprv(phrase) {
    return seedNode(phrase).extendedKey;
}

// The account-level (depth-3) key m/44'/60'/0'. A normal thing for a user to
// hold, and what the import flow used to accept.
function accountXprv(phrase) {
    return seedNode(phrase).derivePath("m/44'/60'/0'").extendedKey;
}

// The wallet record the CURRENT import path writes for a master key: the
// neutered m/44'/60'/0'/0 node, four levels below a depth-0 key.
function healthyXprvWallet(name = "Master") {
    const { xpub, firstAddress } = wallet.hdWalletFromXprv(
        masterXprv(VECTOR_PHRASE),
    );
    return {
        name,
        type: "xprv",
        xpub,
        nextIndex: 1,
        encryptedSecret: "irrelevant-to-these-tests",
        addresses: [{ address: firstAddress, balance: "0.0000" }],
    };
}

// The wallet record the PRE-#210 import path wrote for an account-level key:
// the same four levels, but derived as a relative path *beneath* the key, so
// the stored xpub sits at depth 3 + 4 = 7. Built here the way the old code
// built it rather than by calling the module under test, which now refuses.
function brokenXprvWallet(name = "Imported xprv") {
    const node = HDNodeWallet.fromExtendedKey(
        accountXprv(VECTOR_PHRASE),
    ).derivePath("44'/60'/0'/0");
    return {
        name,
        type: "xprv",
        xpub: node.neuter().extendedKey,
        nextIndex: 1,
        encryptedSecret: "irrelevant-to-these-tests",
        addresses: [
            { address: node.deriveChild(0).address, balance: "0.0000" },
        ],
    };
}

describe("the fixtures are what the two import paths actually produced", () => {
    test("a master import stores a depth-4 xpub", () => {
        expect(
            HDNodeWallet.fromExtendedKey(healthyXprvWallet().xpub).depth,
        ).toBe(4);
    });

    test("the pre-fix account-level import stored a depth-7 xpub", () => {
        expect(
            HDNodeWallet.fromExtendedKey(brokenXprvWallet().xpub).depth,
        ).toBe(7);
    });
});

describe("walletDefect", () => {
    test("names the defect on a stored non-master xprv wallet", () => {
        const defect = walletDefect(brokenXprvWallet());

        expect(defect).not.toBeNull();
        expect(defect.id).toBe(NON_MASTER_XPRV);
    });

    test("a depth-0 xprv wallet has no defect", () => {
        expect(walletDefect(healthyXprvWallet())).toBeNull();
    });

    test("hd and key wallets are never assessed", () => {
        expect(
            walletDefect({ type: "hd", xpub: brokenXprvWallet().xpub }),
        ).toBe(null);
        expect(walletDefect({ type: "key" })).toBeNull();
    });

    test("an xprv wallet whose xpub cannot be parsed makes no claim", () => {
        // No basis to say the key was non-master, so nothing is asserted
        // about it rather than guessing.
        expect(walletDefect({ type: "xprv", xpub: "not-a-key" })).toBeNull();
        expect(walletDefect({ type: "xprv" })).toBeNull();
    });

    test("nothing about the wallet record is modified by the check", () => {
        const w = brokenXprvWallet();
        const before = JSON.stringify(w);

        walletDefect(w);

        expect(JSON.stringify(w)).toBe(before);
    });
});

describe("the explanatory copy", () => {
    const defect = walletDefect(brokenXprvWallet());

    test("every sentence of it is a full sentence", () => {
        for (const text of [defect.heading, ...defect.paragraphs]) {
            expect(text).toMatch(/^[A-Z]/);
            expect(text.trimEnd()).toMatch(/\.$/);
        }
    });

    test("it says what was derived wrongly and that these are not the standard addresses", () => {
        const body = defect.paragraphs.join(" ");

        expect(body).toContain("not a master key");
        expect(body).toMatch(/standard path/);
    });

    test("it does not claim the funds are safe and does not claim a loss", () => {
        const all = [defect.heading, ...defect.paragraphs].join(" ");

        expect(all).not.toMatch(/\bsafe\b/i);
        expect(all).not.toMatch(/\blost\b|\bstolen\b|\bgone\b/i);
    });

    test("it says the wallet is not deleted and what the user can do", () => {
        const body = defect.paragraphs.join(" ");

        expect(body).toMatch(/until you delete it yourself/);
        expect(body).toMatch(/recovery phrase/);
    });

    test("it uses the project's vocabulary", () => {
        const all = [
            defect.heading,
            ...defect.paragraphs,
            defect.shortMessage,
        ].join(" ");

        expect(all).not.toMatch(/seed phrase|mnemonic|passphrase/i);
        expect(all).not.toMatch(/\baccounts?\b/i);
    });
});

describe("walletDefectHtml", () => {
    test("renders the heading and every paragraph for a defective wallet", () => {
        const defect = walletDefect(brokenXprvWallet());
        const html = walletDefectHtml(brokenXprvWallet());

        expect(html).toContain(defect.heading);
        for (const p of defect.paragraphs) {
            expect(html).toContain(p);
        }
    });

    test("renders nothing at all for a healthy wallet", () => {
        expect(walletDefectHtml(healthyXprvWallet())).toBe("");
    });
});

describe("the wallet list", () => {
    let home;
    let state;

    beforeAll(() => {
        global.chrome = {
            storage: { local: { get: async () => ({}), set: async () => {} } },
            runtime: { sendMessage: () => {} },
        };
        home = require("../src/popup/views/home");
        state = require("../src/shared/state").state;
    });

    afterEach(() => {
        state.wallets = [];
        state.activeAddress = null;
    });

    test("a stored depth-3 xprv wallet renders the explanation", () => {
        state.wallets = [brokenXprvWallet("Imported xprv")];

        const html = home.walletListHtml();

        expect(html).toContain(walletDefect(state.wallets[0]).heading);
        expect(html).toContain("Imported xprv");
    });

    test("it does not offer to derive further addresses from that wallet", () => {
        state.wallets = [brokenXprvWallet()];

        expect(home.walletListHtml()).not.toContain("btn-add-address");
    });

    test("a normal depth-0 xprv wallet renders exactly as it did before", () => {
        state.wallets = [healthyXprvWallet("Master")];

        const html = home.walletListHtml();

        expect(html).not.toContain(walletDefect(brokenXprvWallet()).heading);
        expect(html).toContain("btn-add-address");
        expect(html).toContain(state.wallets[0].addresses[0].address);
    });

    test("the defective wallet's notice does not bleed onto a healthy one", () => {
        state.wallets = [brokenXprvWallet("Broken"), healthyXprvWallet("Fine")];

        const html = home.walletListHtml();
        const healthyPart = html.slice(html.indexOf("Fine"));

        expect(html).toContain(walletDefect(state.wallets[0]).heading);
        expect(healthyPart).not.toContain(
            walletDefect(state.wallets[0]).heading,
        );
        expect(healthyPart).toContain("btn-add-address");
    });
});

// A minimal DOM for driving the popup views: any element exists on first
// lookup, and click() runs the listeners a view attached to it.
function makeElement(id) {
    const classes = new Set();
    const el = {
        id,
        textContent: "",
        title: "",
        value: "",
        innerHTML: "",
        disabled: false,
        style: {},
        dataset: {},
        listeners: {},
        classList: {
            add: (...names) => names.forEach((n) => classes.add(n)),
            remove: (...names) => names.forEach((n) => classes.delete(n)),
            contains: (n) => classes.has(n),
            toggle: (n, force) => {
                const on = force === undefined ? !classes.has(n) : force;
                if (on) classes.add(n);
                else classes.delete(n);
                return on;
            },
        },
        addEventListener: (name, fn) => {
            el.listeners[name] = el.listeners[name] || [];
            el.listeners[name].push(fn);
        },
        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"),
        addEventListener: () => {},
        body: { prepend: () => {} },
    };
}

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

function click(id) {
    return Promise.all((node(id).listeners.click || []).map((fn) => fn()));
}

// getSignerForAddress refuses this wallet's key, but only once the password
// has been typed and spent, and the screens report that refusal as a wrong
// password or a failed send. So every control that leads to it refuses first.
describe("every way to a signature or the private key refuses a defective wallet first", () => {
    const RECIPIENT = "0x66133E8ea0f5D1d612D2502a968757D1048c214a";

    let state;
    let decryptWithPassword;
    let home;
    let addressDetail;
    let addressToken;
    let approval;
    let confirmTx;

    let address;
    let shortMessage;
    // What the background answers when the approval window asks which
    // approval it was opened for, and every message the popup sent it.
    let approvalDetails;
    let sent;

    beforeAll(() => {
        state = require("../src/shared/state").state;
        decryptWithPassword =
            require("../src/shared/vault").decryptWithPassword;
        home = require("../src/popup/views/home");
        addressDetail = require("../src/popup/views/addressDetail");
        addressToken = require("../src/popup/views/addressToken");
        approval = require("../src/popup/views/approval");
        confirmTx = require("../src/popup/views/confirmTx");
    });

    beforeEach(() => {
        const broken = brokenXprvWallet();
        // A balance, so that no Send button's zero-balance refusal can stand
        // in for the defect check.
        broken.addresses[0].balance = "1.0000";
        broken.addresses[0].tokenBalances = [];
        address = broken.addresses[0].address;
        shortMessage = walletDefect(broken).shortMessage;

        approvalDetails = null;
        sent = [];
        globalThis.document = makeDocument();
        globalThis.window = { close: () => {} };
        globalThis.chrome = {
            storage: { local: { get: async () => ({}), set: async () => {} } },
            runtime: {
                connect: () => ({ postMessage: () => {} }),
                sendMessage: (msg, reply) => {
                    sent.push(msg);
                    if (!reply) return;
                    reply(
                        msg.type === "AUTISTMASK_GET_APPROVAL"
                            ? approvalDetails
                            : null,
                    );
                },
            },
        };
        // What the wallet's stored secret decrypts to: the account-level key
        // it was imported from.
        decryptWithPassword.mockReset();
        decryptWithPassword.mockResolvedValue(accountXprv(VECTOR_PHRASE));

        state.wallets = [broken];
        state.activeAddress = address;
        state.selectedWallet = 0;
        state.selectedAddress = 0;
        state.selectedToken = "ETH";
        state.viewStack = [];
    });

    afterEach(() => {
        state.wallets = [];
        state.activeAddress = null;
        state.selectedWallet = null;
        state.selectedAddress = null;
        state.selectedToken = null;
    });

    test("Send on the main screen", async () => {
        state.currentView = "main";
        home.init({});

        await click("btn-main-send");

        expect(node("flash-msg").textContent).toBe(shortMessage);
        expect(state.currentView).toBe("main");
    });

    test("Send on the address screen", async () => {
        state.currentView = "address";
        addressDetail.init({});

        await click("btn-send");

        expect(node("flash-msg").textContent).toBe(shortMessage);
        expect(state.currentView).toBe("address");
    });

    test("Export Private Key on the address screen", async () => {
        state.currentView = "address";
        addressDetail.init({});

        await click("btn-export-privkey");

        expect(node("flash-msg").textContent).toBe(shortMessage);
        expect(state.currentView).toBe("address");
    });

    test("Send on a token's screen", async () => {
        state.currentView = "address-token";
        addressToken.init({});

        await click("btn-address-token-send");

        expect(node("flash-msg").textContent).toBe(shortMessage);
        expect(state.currentView).toBe("address-token");
    });

    // The popup reopens onto this screen from a saved view, so the Send
    // buttons above are not the only way onto it. The screen is not drawn,
    // because drawing it starts a fee estimate against the network; with a
    // decrypt that fails, a handler without the check stops at the password
    // instead of going on to a transaction that was never set up.
    test("Send on the confirmation screen", async () => {
        decryptWithPassword.mockRejectedValue(new Error("wrong password"));
        state.currentView = "confirm-tx";
        confirmTx.init({});
        node("confirm-tx-password").value = "any password";

        await click("btn-confirm-send");

        expect(decryptWithPassword).not.toHaveBeenCalled();
        expect(node("confirm-tx-password-error").textContent).toBe(
            shortMessage,
        );
    });

    async function openTxApproval() {
        approvalDetails = {
            type: "tx",
            origin: "https://dapp.example",
            isPhishingDomain: false,
            approvedFrom: address,
            approvedTx: {
                from: address,
                to: RECIPIENT,
                value: "0x0",
                data: "0x",
                chainId: 1,
                nonce: 0,
                gasLimit: "21000",
                maxFeePerGas: "1000000000",
            },
        };
        approval.init({});
        await approval.show(1);
    }

    async function openSignApproval() {
        approvalDetails = {
            type: "sign",
            origin: "https://dapp.example",
            isPhishingDomain: false,
            approvedFrom: address,
            // "Hello", as the hex a page sends.
            signParams: {
                method: "personal_sign",
                message: "0x48656c6c6f",
                from: address,
            },
        };
        approval.init({});
        await approval.show(1);
    }

    test("the transaction approval screen says so and disables Approve", async () => {
        await openTxApproval();

        expect(node("approve-tx-error").textContent).toBe(shortMessage);
        expect(node("btn-approve-tx").disabled).toBe(true);
    });

    // The stub runs a disabled button's listener, which a browser would not:
    // what is asked here is whether the handler refuses on its own.
    test("Approve on the transaction approval screen does not decrypt", async () => {
        await openTxApproval();
        node("approve-tx-password").value = "any password";

        await click("btn-approve-tx");

        expect(decryptWithPassword).not.toHaveBeenCalled();
        expect(sent.map((msg) => msg.type)).not.toContain(
            "AUTISTMASK_TX_RESPONSE",
        );
        expect(node("approve-tx-error").textContent).toBe(shortMessage);
    });

    test("the signature approval screen says so and disables Approve", async () => {
        await openSignApproval();

        expect(node("approve-sign-error").textContent).toBe(shortMessage);
        expect(node("btn-approve-sign").disabled).toBe(true);
    });

    test("Approve on the signature approval screen does not decrypt", async () => {
        await openSignApproval();
        node("approve-sign-password").value = "any password";

        await click("btn-approve-sign");

        expect(decryptWithPassword).not.toHaveBeenCalled();
        expect(sent.map((msg) => msg.type)).not.toContain(
            "AUTISTMASK_SIGN_RESPONSE",
        );
        expect(node("approve-sign-error").textContent).toBe(shortMessage);
    });
});

describe("no path throws an unhandled error for a defective wallet", () => {
    test("address derivation from the stored xpub still works", () => {
        // The stored xpub is at a non-standard depth but is a valid extended
        // key; deriving from it is what the list render already does.
        const w = brokenXprvWallet();

        expect(() => wallet.deriveAddressFromXpub(w.xpub, 0)).not.toThrow();
        expect(wallet.deriveAddressFromXpub(w.xpub, 0)).toBe(
            w.addresses[0].address,
        );
    });

    test("the wallet list renders without throwing", () => {
        const { state } = require("../src/shared/state");
        const home = require("../src/popup/views/home");
        state.wallets = [brokenXprvWallet()];

        expect(() => home.walletListHtml()).not.toThrow();

        state.wallets = [];
    });

    test("signing refuses with the named defect rather than a bare failure", () => {
        // getSignerForAddress is the backstop behind the UI gate. It must
        // still refuse, and it must say why in a sentence the user can read.
        let thrown = null;
        try {
            wallet.getSignerForAddress(
                { type: "xprv" },
                0,
                accountXprv(VECTOR_PHRASE),
            );
        } catch (e) {
            thrown = e;
        }

        expect(thrown).not.toBeNull();
        expect(thrown.message).toMatch(/master key/);
        expect(thrown.message.trimEnd()).toMatch(/\.$/);
    });

    test("a healthy xprv wallet signs as it always did", () => {
        const signer = wallet.getSignerForAddress(
            { type: "xprv" },
            0,
            masterXprv(VECTOR_PHRASE),
        );

        expect(signer.address).toBe(healthyXprvWallet().addresses[0].address);
    });
});