// After "Add" on AddToken, AddressDetail lists the new token. Its line reads
// `quantity unknown`, not 0.0000, until a balance refresh has read the token's
// balance at every address, even if the popup closes and opens again
// meanwhile. A token added on SettingsAddToken reads the same wherever it is
// listed. A refresh that returns draws the balances on AddressDetail or
// AddressToken again, so the fetched balance shows without the screen being
// reopened (https://git.eeqj.de/sneak/AutistMask/issues/516).
//
// The tracked token's record carries `balanceNotFetched` until a refresh has
// read the token's balance. Removing the token removes that record. A network
// switch keeps each network's records apart.
//
// Driven through the real popup over a stored profile on Ethereum Mainnet,
// with "Show tracked tokens with zero balance" on, as it is by default.

const {
    bootPopup,
    cleanupPopup,
    unversionedValidProfile,
} = require("./support/popupBoot");

// Tracked by nobody until a test adds it.
const NEW_TOKEN = "0xBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB";

// A holding of a million NEW_TOKEN, as refreshBalances() stores it.
const MILLION = {
    address: NEW_TOKEN,
    name: "New Token",
    symbol: "NEW",
    decimals: 18,
    balance: "1000000.0",
    holders: 3,
};

afterEach(() => {
    cleanupPopup();
});

// The popup reopened onto AddressDetail for the one address.
function bootOnAddress(extra) {
    return bootPopup(
        unversionedValidProfile({
            currentView: "address",
            selectedWallet: 0,
            selectedAddress: 0,
            ...extra,
        }),
    );
}

// Holds the next balance refresh open. The returned function lets it finish
// with the address's ETH balance at 2 and `tokenBalances` as its token
// entries, having read the balance of every token tracked when it started.
// Given null, it finishes having read no token's balance, as when every
// balanceOf fails, and leaves the token entries as they were.
function holdNextRefresh(page) {
    const { refreshBalances } = require("../src/shared/balances");
    let release;
    refreshBalances.mockImplementationOnce(
        async (wallets, rpcUrl, explorerUrl, trackedTokens) => {
            const read = trackedTokens.map((t) => t.address.toLowerCase());
            const tokenBalances = await new Promise((resolve) => {
                release = resolve;
            });
            wallets[0].addresses[0].balance = "2.0";
            if (tokenBalances === null) return [];
            wallets[0].addresses[0].tokenBalances = tokenBalances;
            return read;
        },
    );
    return async (tokenBalances) => {
        release(tokenBalances);
        await page.settle();
    };
}

// Runs the ten-second refresh to the end, finishing it as holdNextRefresh()
// does with `tokenBalances`.
async function refreshOnce(page, tokenBalances) {
    const finish = holdNextRefresh(page);
    const ticking = page.tick();
    await page.settle();
    await finish(tokenBalances);
    await ticking;
}

// "+ Token", NEW_TOKEN typed in, and "Add", with the contract lookup
// answering at once.
async function addNewToken(page) {
    const { lookupTokenInfo } = require("../src/shared/balances");
    lookupTokenInfo.mockResolvedValueOnce({
        symbol: "NEW",
        decimals: 18,
        name: "New Token",
    });
    await page.click("btn-add-token");
    page.node("add-token-address").value = NEW_TOKEN;
    await page.click("btn-add-token-confirm");
}

// Settings' "+ Add token", NEW_TOKEN typed in, and "Add", with the contract
// lookup answering at once. It ends on SettingsAddToken.
async function addOnSettingsAddToken(page) {
    const { lookupTokenInfo } = require("../src/shared/balances");
    lookupTokenInfo.mockResolvedValueOnce({
        symbol: "NEW",
        decimals: 18,
        name: "New Token",
    });
    await page.click("btn-settings-add-token");
    page.node("settings-addtoken-address").value = NEW_TOKEN;
    await page.click("btn-settings-addtoken-manual");
}

// The "[x]" button Settings draws beside the first tracked token. The page
// stub does not turn the markup Settings draws into elements. So the list
// hands Settings a stand-in for that button each time it is drawn, and
// `press()` presses the last one drawn. Call it before Settings opens.
function firstRemoveButton(page) {
    const button = { press: null };
    page.node("settings-tracked-tokens").querySelectorAll = () => [
        {
            dataset: { idx: "0" },
            addEventListener: (name, fn) => {
                button.press = fn;
            },
        },
    ];
    return button;
}

// Picks `networkId` in the Settings network selector, as the user does.
async function chooseNetwork(page, networkId) {
    const select = page.node("settings-network");
    select.value = networkId;
    for (const fn of select.listeners.change) await fn();
    await page.settle();
}

// NEW_TOKEN's row in the balance list in element `id`, AddressDetail's unless
// another is named, as markup.
function newTokenRow(page, id = "address-balances") {
    return page
        .node(id)
        .innerHTML.split("<div ")
        .find((row) =>
            row.includes('data-token="' + NEW_TOKEN.toLowerCase() + '"'),
        );
}

// AddressDetail for the one address opened from Home, as its `[info]` button
// does.
async function openAddress(page) {
    const { state } = require("../src/shared/state");
    state.selectedWallet = 0;
    state.selectedAddress = 0;
    require("../src/popup/views/helpers").pushCurrentView();
    require("../src/popup/views/addressDetail").show();
    await page.settle();
}

// AddressToken for `token` opened from AddressDetail, as tapping the token's
// row there does.
async function openToken(page, token) {
    const { state } = require("../src/shared/state");
    state.selectedToken = token;
    require("../src/popup/views/helpers").pushCurrentView();
    require("../src/popup/views/addressToken").show();
    await page.settle();
}

test("until the refresh Add started returns, the new token's line reads quantity unknown", async () => {
    const page = await bootOnAddress();
    expect(page.pageErrors).toEqual([]);
    const finish = holdNextRefresh(page);

    await addNewToken(page);

    expect(page.visibleViews()).toEqual(["address"]);
    const row = newTokenRow(page);
    expect(row).toContain("quantity unknown");
    expect(row).not.toContain("0.0000");
    await finish([MILLION]);
});

test("once that refresh returns, AddressDetail shows the fetched balance without being reopened", async () => {
    const page = await bootOnAddress();
    const finish = holdNextRefresh(page);
    await addNewToken(page);
    // Stands for the transactions on the screen, which only show() replaces.
    page.node("tx-list").innerHTML = "transactions on the screen";

    await finish([MILLION]);

    expect(page.visibleViews()).toEqual(["address"]);
    expect(newTokenRow(page)).toContain("1000000.0000");
    // Only the balances are drawn again, not the transaction list.
    expect(page.node("tx-list").innerHTML).toBe("transactions on the screen");
});

test("a refresh already running when the token is added does not count as reading its balance", async () => {
    const page = await bootOnAddress();
    const finishRunning = holdNextRefresh(page);
    const ticking = page.tick();
    await page.settle();

    await addNewToken(page);
    await finishRunning([]);
    await ticking;

    expect(newTokenRow(page)).toContain("quantity unknown");

    // The next one reads the token's balance, which is zero.
    await refreshOnce(page, []);

    expect(newTokenRow(page)).toContain("0.0000");
});

test("closed and opened again before any refresh has read its balance, the new token's line still reads quantity unknown", async () => {
    const closed = await bootOnAddress();
    holdNextRefresh(closed);
    await addNewToken(closed);
    cleanupPopup();

    // The refresh this boot starts reads no token's balance: the boot's stub
    // of refreshBalances() reads none.
    const page = await bootPopup(undefined, { storage: closed.storage });
    expect(page.visibleViews()).toEqual(["address"]);
    const row = newTokenRow(page);
    expect(row).toContain("quantity unknown");
    expect(row).not.toContain("0.0000");

    await refreshOnce(page, [MILLION]);

    expect(newTokenRow(page)).toContain("1000000.0000");
});

test("a refresh that could not read the new token's balance leaves its line quantity unknown", async () => {
    const page = await bootOnAddress();
    const finish = holdNextRefresh(page);
    await addNewToken(page);

    await finish(null);

    // Drawn again: the ETH balance it fetched is shown.
    expect(page.node("address-balances").innerHTML).toContain("2.0000");
    expect(newTokenRow(page)).toContain("quantity unknown");
});

test("AddressToken for the new token reads quantity unknown until the refresh returns, then the fetched balance", async () => {
    const page = await bootOnAddress();
    const finish = holdNextRefresh(page);
    await addNewToken(page);

    await openToken(page, NEW_TOKEN.toLowerCase());

    expect(page.visibleViews()).toEqual(["address-token"]);
    const before = page.node("address-token-balance").innerHTML;
    expect(before).toContain("quantity unknown");
    expect(before).not.toContain("0.0000");

    await finish([MILLION]);

    expect(page.node("address-token-balance").innerHTML).toContain(
        "1000000.0000",
    );
});

test("a token added by contract address on SettingsAddToken reads quantity unknown until the refresh returns", async () => {
    const page = await bootPopup(unversionedValidProfile());
    expect(page.visibleViews()).toEqual(["main"]);
    const finish = holdNextRefresh(page);

    await page.click("btn-settings");
    await addOnSettingsAddToken(page);
    await page.click("btn-settings-addtoken-back");
    await page.click("btn-settings-back");
    expect(page.visibleViews()).toEqual(["main"]);
    const onHome = newTokenRow(page, "wallet-list");
    expect(onHome).toContain("quantity unknown");
    expect(onHome).not.toContain("0.0000");

    await openAddress(page);
    const onAddress = newTokenRow(page);
    expect(onAddress).toContain("quantity unknown");
    expect(onAddress).not.toContain("0.0000");

    await finish([MILLION]);

    expect(newTokenRow(page)).toContain("1000000.0000");
});

test("a refresh that returns while AddressToken is up draws its balance again", async () => {
    const page = await bootPopup(
        unversionedValidProfile({
            currentView: "address-token",
            viewStack: ["main", "address"],
            selectedWallet: 0,
            selectedAddress: 0,
            selectedToken: "ETH",
        }),
    );
    expect(page.visibleViews()).toEqual(["address-token"]);
    expect(page.node("address-token-balance").innerHTML).toContain("1.5000");

    await refreshOnce(page, null);

    expect(page.node("address-token-balance").innerHTML).toContain("2.0000");
});

test("a token removed before any refresh has read its balance leaves nothing stored, and adding it again tracks it once", async () => {
    const page = await bootPopup(unversionedValidProfile());
    const removeButton = firstRemoveButton(page);
    const stored = () => page.storage.read("autistmask");

    await page.click("btn-settings");
    await addOnSettingsAddToken(page);
    // Settings opened again from Home draws its list with the token in it.
    await page.click("btn-settings-addtoken-back");
    await page.click("btn-settings-back");
    await page.click("btn-settings");
    await removeButton.press();
    await page.settle();

    expect(stored().trackedTokens).toEqual([]);
    // Nothing in the stored record names the token any more.
    expect(JSON.stringify(stored()).toLowerCase()).not.toContain(
        NEW_TOKEN.toLowerCase(),
    );

    await addOnSettingsAddToken(page);
    // A second add of the same token is refused.
    page.node("settings-addtoken-address").value = NEW_TOKEN;
    await page.click("btn-settings-addtoken-manual");

    const added = { address: NEW_TOKEN, symbol: "NEW", decimals: 18 };
    expect(stored().trackedTokens).toEqual([
        { ...added, name: "New Token", balanceNotFetched: true },
    ]);

    await refreshOnce(page, []);

    expect(stored().trackedTokens).toEqual([{ ...added, name: "New Token" }]);
});

test("a refresh on another network leaves the new token reading quantity unknown on its own", async () => {
    // Sepolia tracks a token at the same contract address, also just added.
    const sepoliaToken = {
        address: NEW_TOKEN,
        symbol: "SEP",
        name: "Sepolia Token",
        decimals: 18,
    };
    const page = await bootOnAddress({
        networkTrackedTokens: {
            sepolia: [{ ...sepoliaToken, balanceNotFetched: true }],
        },
    });
    const finishMainnet = holdNextRefresh(page);
    await addNewToken(page);

    await page.click("btn-settings");
    await chooseNetwork(page, "sepolia");
    // The refresh Add started returns after the switch and writes nothing.
    await finishMainnet([MILLION]);
    // Sepolia's refresh reads the balance of its own token.
    await refreshOnce(page, []);

    const stored = page.storage.read("autistmask");
    expect(stored.trackedTokens).toEqual([sepoliaToken]);
    expect(stored.networkTrackedTokens.mainnet[0].balanceNotFetched).toBe(true);

    await chooseNetwork(page, "mainnet");
    await page.click("btn-settings-back");

    expect(page.visibleViews()).toEqual(["address"]);
    expect(newTokenRow(page)).toContain("quantity unknown");

    await refreshOnce(page, [MILLION]);

    expect(newTokenRow(page)).toContain("1000000.0000");
});