// Tests for the recovery phrase display (issue #161).
//
// These cover which wallet types may be offered the action at all, the
// exclusion of the screen from the set of views the popup may reopen onto,
// the absence of any path from this module to the logger, and, against a
// minimal DOM stub, where Back goes after the screen is left by the settings
// gear or by its own Back. The rest of the DOM behaviour it guards — nothing rendered before the
// password is accepted, a wrong password revealing nothing, and the wipe on
// leaving — is driven against the real popup in a real browser by
// tests/e2e/run.js, which is where every other view behaviour is tested.

jest.mock("../src/shared/vault", () => ({
    decryptWithPassword: jest.fn(),
}));

const fs = require("fs");
const path = require("path");

const { walletHasRecoveryPhrase } = require("../src/shared/wallet");
const { RESTORABLE_VIEWS } = require("../src/shared/restorableViews");

const SHOW_PHRASE_VIEW = "show-phrase";

// helpers.js pulls in state.js, which reads chrome.storage.local at load.
function loadHelpers() {
    globalThis.chrome = {
        storage: { local: { get: async () => ({}), set: async () => {} } },
    };
    return require("../src/popup/views/helpers");
}

describe("which wallets have a recovery phrase", () => {
    test("an HD wallet does", () => {
        expect(walletHasRecoveryPhrase({ type: "hd" })).toBe(true);
    });

    // A key wallet holds a bare private key and an xprv wallet an extended
    // private key. Neither can be turned back into words, so neither may be
    // offered the action.
    test("a key wallet does not", () => {
        expect(walletHasRecoveryPhrase({ type: "key" })).toBe(false);
    });

    test("an xprv wallet does not", () => {
        expect(walletHasRecoveryPhrase({ type: "xprv" })).toBe(false);
    });

    test("an unknown or missing wallet type does not", () => {
        expect(walletHasRecoveryPhrase({ type: "something-new" })).toBe(false);
        expect(walletHasRecoveryPhrase({})).toBe(false);
        expect(walletHasRecoveryPhrase(undefined)).toBe(false);
    });
});

describe("views the popup may reopen onto", () => {
    // Restoring onto a secret screen would put the phrase on screen with no
    // password prompt in front of it, on a popup the user may have reopened
    // by accident.
    test("the recovery phrase screen is not restorable", () => {
        expect(RESTORABLE_VIEWS.has(SHOW_PHRASE_VIEW)).toBe(false);
    });

    test("the private key export screen is not restorable either", () => {
        expect(RESTORABLE_VIEWS.has("export-privkey")).toBe(false);
    });

    test("the recovery phrase screen is still a registered view", () => {
        const { VIEWS } = loadHelpers();
        expect(VIEWS).toContain(SHOW_PHRASE_VIEW);
    });

    // Guards the other direction: a restorable name that is not a real view
    // would leave restoreView() showing nothing at all.
    test("every restorable view is a registered view", () => {
        const { VIEWS } = loadHelpers();
        for (const view of RESTORABLE_VIEWS) {
            expect(VIEWS).toContain(view);
        }
    });
});

// Just enough document for helpers.showView() and this view: every element
// is made on first lookup and keeps what the view writes to it, its click
// handler included.
function makeDocument() {
    const els = new Map();
    function makeElement() {
        const classes = new Set();
        const el = {
            textContent: "",
            value: "",
            style: {},
            classList: {
                add: (name) => classes.add(name),
                remove: (name) => classes.delete(name),
                contains: (name) => classes.has(name),
                toggle: (name, on) =>
                    on ? classes.add(name) : classes.delete(name),
            },
            addEventListener: (name, fn) => {
                if (name === "click") el.onClick = fn;
            },
        };
        return el;
    }
    return {
        getElementById(id) {
            // Created on demand by helpers.js; absent on a mainnet popup
            // that is not a debug build.
            if (id === "debug-banner") return null;
            if (!els.has(id)) els.set(id, makeElement());
            return els.get(id);
        },
    };
}

describe("Back from Settings after leaving by the settings gear", () => {
    // On Settings, opened from Home.
    function load() {
        jest.resetModules();
        globalThis.document = makeDocument();
        const helpers = loadHelpers();
        const { state } = require("../src/shared/state");
        const showPhrase = require("../src/popup/views/showPhrase");
        showPhrase.init();
        state.wallets = [{ name: "Wallet 1", type: "hd", addresses: [] }];
        state.currentView = "settings";
        state.viewStack = ["main"];
        return { helpers, state, showPhrase };
    }

    // https://git.eeqj.de/sneak/AutistMask/issues/461: leaving drops the
    // wallet selection, so Back onto this screen showed a password prompt
    // that could only answer "No wallet is selected."
    test("does not land on the recovery phrase screen", () => {
        const { helpers, state, showPhrase } = load();

        // Opened from the wallet list in Settings, then left by the gear:
        // push the current view, then show Settings.
        showPhrase.show(0);
        helpers.pushCurrentView();
        helpers.showView("settings");

        expect(state.viewStack).toEqual(["main", "settings"]);
        helpers.goBack();
        expect(state.currentView).not.toBe(SHOW_PHRASE_VIEW);
    });

    // This Back takes Settings off the stack before the screen is left, so
    // the stack's top is then the entry Back from Settings will need.
    test("its own Back button leaves the rest of the stack alone", () => {
        const { state, showPhrase } = load();
        showPhrase.show(0);

        globalThis.document.getElementById("btn-show-phrase-back").onClick();

        expect(state.currentView).toBe("settings");
        expect(state.viewStack).toEqual(["main"]);
    });
});

describe("the phrase cannot reach the logger", () => {
    const source = fs.readFileSync(
        path.join(__dirname, "..", "src", "popup", "views", "showPhrase.js"),
        "utf8",
    );

    // The decrypted phrase only ever lives in a local and in the DOM node
    // that displays it. The module has no logger to hand it to, and this
    // pins that: src/shared/log.js writes to the console, and a console
    // record of a recovery phrase outlives the popup.
    test("the view does not import src/shared/log.js", () => {
        expect(source).not.toMatch(/require\(["'][^"']*shared\/log["']\)/);
    });

    test("the view calls no logger method", () => {
        expect(source).not.toMatch(/\blog\.(debugf|infof|warnf|errorf)\b/);
    });
});