// An open popup follows a network switch the background saves once the user
// approves a site's request: it takes the new network from the stored record
// and draws the screen it is on for it, as a switch in Settings does
// (https://git.eeqj.de/sneak/AutistMask/issues/650). Driven through the real
// popup over a stored profile on Ethereum Mainnet. The background's write is
// the storage stub's set, which the stub reports to the page as the browser
// does.

const {
    bootPopup,
    cleanupPopup,
    unversionedValidProfile,
    TOKEN_ADDRESS,
} = require("./support/popupBoot");
const { makeStorageStub } = require("./support/storageStub");
const {
    applyChainSwitchFields,
    copyChainSwitchFields,
} = require("../src/shared/chainSwitchFields");
const { NETWORKS } = require("../src/shared/networks");
const { STATE_SCHEMA_VERSION } = require("../src/shared/stateSchema");

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

const SEPOLIA_TOKEN = {
    address: TOKEN_ADDRESS,
    symbol: "TST",
    decimals: 18,
    name: "Test Token",
};
const MAINNET_TOKEN = {
    address: "0x6B175474E89094C44Da98b954EedeAC495271d0F",
    symbol: "DAI",
    decimals: 18,
    name: "Dai Stablecoin",
};

// A profile on Ethereum Mainnet that reopens the popup onto AddressDetail,
// with DAI tracked there and TST tracked on Sepolia.
function profileOnAddress() {
    return unversionedValidProfile({
        currentView: "address",
        viewStack: ["main"],
        selectedWallet: 0,
        selectedAddress: 0,
        trackedTokens: [MAINNET_TOKEN],
        networkTrackedTokens: { sepolia: [SEPOLIA_TOKEN] },
    });
}

// The popup reopened onto it.
function bootOnAddress() {
    return bootPopup(profileOnAddress());
}

// The background saves a switch to `networkId`, as its updateState() does
// once the user approves a site's request.
async function backgroundSwitch(page, networkId) {
    const record = page.storage.read("autistmask");
    applyChainSwitchFields(record, networkId);
    await page.storage.local.set({ autistmask: record });
    await page.settle();
    await page.settle();
}

test("the popup open on AddressDetail shows the new network and its balances", async () => {
    const page = await bootOnAddress();
    expect(page.pageErrors).toEqual([]);
    expect(page.visibleViews()).toEqual(["address"]);
    expect(page.node("address-balances").innerHTML).toContain("DAI");
    expect(page.node("debug-banner")).toBeNull();

    await backgroundSwitch(page, "sepolia");

    const { state } = require("../src/shared/state");
    expect(state.networkId).toBe("sepolia");
    expect(state.rpcUrl).toBe(NETWORKS.sepolia.defaultRpcUrl);
    expect(page.visibleViews()).toEqual(["address"]);
    const balances = page.node("address-balances").innerHTML;
    expect(balances).toContain("TST");
    expect(balances).toContain("SepoliaETH");
    expect(balances).not.toContain("DAI");
    expect(page.text("debug-banner")).toBe("[TESTNET]");

    // Its next refresh runs on Sepolia, and what it fetched is stored.
    await page.tick();
    const { refreshBalances } = require("../src/shared/balances");
    expect(refreshBalances.mock.lastCall[4]).toBe("sepolia");
    const stored = page.storage.read("autistmask");
    expect(stored.networkId).toBe("sepolia");
    expect(stored.lastBalanceRefresh).toBeGreaterThan(0);
});

test("the popup open on Settings shows the new network, and Back draws the screen beneath for it", async () => {
    const page = await bootOnAddress();
    await page.click("btn-settings");
    expect(page.visibleViews()).toEqual(["settings"]);

    await backgroundSwitch(page, "sepolia");

    expect(page.visibleViews()).toEqual(["settings"]);
    expect(page.value("settings-network")).toBe("sepolia");
    expect(page.value("settings-rpc")).toBe(NETWORKS.sepolia.defaultRpcUrl);
    expect(page.node("settings-tracked-tokens").innerHTML).toContain("TST");
    expect(page.text("debug-banner")).toBe("[TESTNET]");

    await page.click("btn-settings-back");
    expect(page.visibleViews()).toEqual(["address"]);
    expect(page.node("address-balances").innerHTML).not.toContain("DAI");
});

// Neither can be drawn again for the new network: Send cannot be rendered from
// saved state, and DAI was picked on Ethereum Mainnet, where alone it is
// tracked. A reopened popup goes to Home in their place.
test.each([
    ["Send", (page) => page.click("btn-send")],
    [
        "AddressToken for DAI",
        async (page) => {
            const { state } = require("../src/shared/state");
            state.selectedToken = MAINNET_TOKEN.address;
            require("../src/popup/views/helpers").pushCurrentView();
            require("../src/popup/views/addressToken").show();
            await page.settle();
        },
    ],
])("the popup open on %s goes to Home", async (_view, open) => {
    const page = await bootOnAddress();
    await open(page);
    expect(page.visibleViews()).not.toEqual(["address"]);

    await backgroundSwitch(page, "sepolia");

    expect(page.visibleViews()).toEqual(["main"]);
    expect(page.text("total-value")).toBe("0.0000 SepoliaETH");
});

// The report of the switch's own save names the network the page already has.
test("a switch in Settings is not taken a second time when its save is reported", async () => {
    const page = await bootOnAddress();
    await page.click("btn-settings");
    const { get, set } = page.storage.local;
    const reads = get.mock.calls.length;
    const writes = set.mock.calls.length;

    const select = page.node("settings-network");
    select.value = "sepolia";
    for (const fn of select.listeners.change) await fn();
    await page.settle();
    await page.settle();

    expect(get).toHaveBeenCalledTimes(reads + 1);
    expect(set).toHaveBeenCalledTimes(writes + 1);
    expect(page.text("flash-msg")).toBe("Switched to Sepolia Testnet.");
});

// The background saves the switch once the popup has read the stored record
// and before it listens for changes to it, so the browser tells the page
// nothing of it. Nor is any later write reported here: Chrome reports none
// that leaves the record as it was, such as the popup's own save at start-up.
test("a switch saved while the popup opens, before it listens for one, is followed", async () => {
    const storage = makeStorageStub({ autistmask: profileOnAddress() });
    storage.onChanged = { addListener: () => {} };
    const read = storage.local.get.getMockImplementation();
    storage.local.get.mockImplementationOnce(async (key) => {
        const loaded = await read(key);
        const record = storage.read("autistmask");
        applyChainSwitchFields(record, "sepolia");
        storage.write("autistmask", record);
        return loaded;
    });
    const page = await bootPopup(undefined, { storage });
    await page.settle();

    const { state } = require("../src/shared/state");
    expect(page.pageErrors).toEqual([]);
    expect(state.networkId).toBe("sepolia");
    expect(page.visibleViews()).toEqual(["address"]);
    expect(page.node("address-balances").innerHTML).toContain("SepoliaETH");
    expect(page.text("debug-banner")).toBe("[TESTNET]");
});

// While the popup's follow of the background's switch to Sepolia waits for the
// lock, the user picks Sepolia in Settings and then Ethereum Mainnet again. The
// last pick is the network stored, and the last one sites are told of.
test("a switch in Settings made while a follow waits for the lock is not overwritten by it", async () => {
    const page = await bootOnAddress();
    await page.click("btn-settings");

    // Another write holds the lock, so every save of the page waits for it.
    let releaseLock;
    const lockHeld = navigator.locks.request(
        "autistmask",
        () =>
            new Promise((resolve) => {
                releaseLock = resolve;
            }),
    );
    await backgroundSwitch(page, "sepolia");
    const select = page.node("settings-network");
    const picks = [];
    for (const networkId of ["sepolia", "mainnet"]) {
        select.value = networkId;
        for (const fn of select.listeners.change) picks.push(fn());
    }
    releaseLock();
    await lockHeld;
    await Promise.all(picks);
    await page.settle();

    const { state } = require("../src/shared/state");
    expect(state.networkId).toBe("mainnet");
    expect(page.storage.read("autistmask").networkId).toBe("mainnet");
    expect(page.value("settings-network")).toBe("mainnet");
    const told = globalThis.chrome.runtime.sendMessage.mock.calls
        .map(([message]) => message)
        .filter((message) => message.type === "AUTISTMASK_NETWORK_CHANGED");
    expect(told.at(-1).chainId).toBe(NETWORKS.mainnet.chainId);
});

// The popup follows the background's switch to Sepolia, but its own write in
// that save fails. The user then picks Ethereum Mainnet in Settings, the
// network the popup was on before: that switch is stored, and only then
// flashed and sent to sites.
test("a switch back in Settings after a follow whose write failed is stored", async () => {
    const page = await bootOnAddress();
    await page.click("btn-settings");
    const { set } = page.storage.local;
    const write = set.getMockImplementation();
    // The background's write lands; the next, the follow's, fails.
    set.mockImplementationOnce(write).mockRejectedValueOnce(
        new Error("quota exceeded"),
    );
    await backgroundSwitch(page, "sepolia");
    const { state } = require("../src/shared/state");
    expect(state.networkId).toBe("sepolia");

    const select = page.node("settings-network");
    select.value = "mainnet";
    for (const fn of select.listeners.change) await fn();
    await page.settle();

    const stored = page.storage.read("autistmask");
    expect(stored.networkId).toBe("mainnet");
    expect(stored.rpcUrl).toBe(NETWORKS.mainnet.defaultRpcUrl);
    expect(stored.trackedTokens).toEqual([MAINNET_TOKEN]);
    expect(page.text("flash-msg")).toBe("Switched to Ethereum Mainnet.");
    const told = globalThis.chrome.runtime.sendMessage.mock.calls
        .map(([message]) => message)
        .filter((message) => message.type === "AUTISTMASK_NETWORK_CHANGED");
    expect(told.at(-1).chainId).toBe(NETWORKS.mainnet.chainId);
});

// The user saves an endpoint URL in Settings on Ethereum Mainnet. Before the
// URL is stored, the background saves a switch to Sepolia. Another write holds
// the lock, so the popup's follow of that switch and the URL's save both wait
// for the lock. Either may take it first. The URL is stored for neither
// network. The flash message says that the network changed.
test.each([
    { button: "btn-save-rpc", field: "settings-rpc", first: "follow" },
    { button: "btn-save-rpc", field: "settings-rpc", first: "save" },
    {
        button: "btn-save-blockscout",
        field: "settings-blockscout",
        first: "follow",
    },
    {
        button: "btn-save-blockscout",
        field: "settings-blockscout",
        first: "save",
    },
])(
    "$button saves nothing when the network changes before the URL is stored ($first first)",
    async ({ button, field, first }) => {
        const page = await bootOnAddress();
        await page.click("btn-settings");
        // This answer passes both endpoint checks. The RPC check reads
        // Ethereum Mainnet's chain id from it. The Blockscout check reads `ok`.
        globalThis.fetch.mockResolvedValue({
            ok: true,
            json: async () => ({ result: NETWORKS.mainnet.chainId }),
        });
        const url = "https://own-node.example.invalid";

        let releaseLock;
        const lockHeld = navigator.locks.request(
            "autistmask",
            () =>
                new Promise((resolve) => {
                    releaseLock = resolve;
                }),
        );
        // The click handler runs until its save waits for the lock.
        const tapSave = async () => {
            page.node(field).value = url;
            const saving = page.node(button).listeners.click.map((fn) => fn());
            await page.settle();
            return saving;
        };
        let saving;
        if (first === "save") saving = await tapSave();
        await backgroundSwitch(page, "sepolia");
        if (first === "follow") saving = await tapSave();
        releaseLock();
        await lockHeld;
        await Promise.all(saving);
        await page.settle();

        const { state } = require("../src/shared/state");
        expect(state.networkId).toBe("sepolia");
        expect(JSON.stringify(page.storage.read("autistmask"))).not.toContain(
            url,
        );
        expect(page.text("flash-msg")).toBe(
            "The URL was not saved because the network changed.",
        );
    },
);

// The popup's follow of the background's switch to Sepolia has set `state` to
// Sepolia. The follow's write has not returned yet, so Settings still shows
// Ethereum Mainnet. The user taps "Save" there. The URL is for Ethereum
// Mainnet, so the save stores the URL for neither network.
test.each([
    { button: "btn-save-rpc", field: "settings-rpc" },
    { button: "btn-save-blockscout", field: "settings-blockscout" },
])(
    "$button saves nothing when tapped while the follow's write waits",
    async ({ button, field }) => {
        const page = await bootOnAddress();
        await page.click("btn-settings");
        // This answer passes both endpoint checks on Ethereum Mainnet.
        globalThis.fetch.mockResolvedValue({
            ok: true,
            json: async () => ({ result: NETWORKS.mainnet.chainId }),
        });
        const url = "https://own-node.example.invalid";

        const { set } = page.storage.local;
        const write = set.getMockImplementation();
        let releaseWrite;
        const writeHeld = new Promise((resolve) => {
            releaseWrite = resolve;
        });
        // The background's write lands; the next, the follow's, waits.
        set.mockImplementationOnce(write).mockImplementationOnce(
            async (items) => {
                await writeHeld;
                await write(items);
            },
        );
        await backgroundSwitch(page, "sepolia");
        const { state } = require("../src/shared/state");
        expect(state.networkId).toBe("sepolia");
        expect(page.value("settings-network")).toBe("mainnet");

        page.node(field).value = url;
        const saving = page.node(button).listeners.click.map((fn) => fn());
        await page.settle();
        releaseWrite();
        await Promise.all(saving);
        await page.settle();

        expect(JSON.stringify(page.storage.read("autistmask"))).not.toContain(
            url,
        );
        expect(page.text("flash-msg")).toBe(
            "The URL was not saved because the network changed.",
        );
    },
);

// The user taps the RPC "Save" on Ethereum Mainnet. While the check waits for
// the node's answer, the popup follows the background's switch to Sepolia. The
// node answers with Sepolia's chain id. So the check refuses the node for
// Ethereum Mainnet, and nothing is stored.
test("the RPC check compares the answer with the network at the tap", async () => {
    const page = await bootOnAddress();
    await page.click("btn-settings");
    let answer;
    globalThis.fetch.mockReturnValue(
        new Promise((resolve) => {
            answer = resolve;
        }),
    );
    const url = "https://sepolia-node.example.invalid";

    page.node("settings-rpc").value = url;
    const saving = page.node("btn-save-rpc").listeners.click.map((fn) => fn());
    await page.settle();
    await backgroundSwitch(page, "sepolia");
    const { state } = require("../src/shared/state");
    expect(state.networkId).toBe("sepolia");
    answer({ json: async () => ({ result: NETWORKS.sepolia.chainId }) });
    await Promise.all(saving);
    await page.settle();

    expect(JSON.stringify(page.storage.read("autistmask"))).not.toContain(url);
    expect(page.text("flash-msg")).toBe(
        "Wrong network: expected Ethereum Mainnet.",
    );
});

// The user taps the Blockscout "Save" on Ethereum Mainnet. While the check
// waits for Blockscout's answer, the popup follows the background's switch to
// Sepolia. The URL is for Ethereum Mainnet, so nothing is stored.
test("the Blockscout save is for the network at the tap", async () => {
    const page = await bootOnAddress();
    await page.click("btn-settings");
    let answer;
    globalThis.fetch.mockReturnValue(
        new Promise((resolve) => {
            answer = resolve;
        }),
    );
    const url = "https://own-explorer.example.invalid/api/v2";

    page.node("settings-blockscout").value = url;
    const saving = page
        .node("btn-save-blockscout")
        .listeners.click.map((fn) => fn());
    await page.settle();
    await backgroundSwitch(page, "sepolia");
    expect(page.value("settings-network")).toBe("sepolia");
    answer({ ok: true });
    await Promise.all(saving);
    await page.settle();

    expect(JSON.stringify(page.storage.read("autistmask"))).not.toContain(url);
    expect(page.text("flash-msg")).toBe(
        "The URL was not saved because the network changed.",
    );
});

// Settings is open when the network changes to Sepolia. The popup follows the
// background's switch, or the user picks Sepolia in the network selector. Each
// "Save" after the switch stores its URL for Sepolia.
test.each([
    ["a follow", (page) => backgroundSwitch(page, "sepolia")],
    [
        "the network selector",
        async (page) => {
            const select = page.node("settings-network");
            select.value = "sepolia";
            for (const fn of select.listeners.change) await fn();
            await page.settle();
        },
    ],
])(
    "after a switch to Sepolia by %s, Settings saves each URL for Sepolia",
    async (_how, switchToSepolia) => {
        const page = await bootOnAddress();
        await page.click("btn-settings");
        await switchToSepolia(page);
        // This answer passes both endpoint checks on Sepolia. The RPC check
        // reads Sepolia's chain id from it. The Blockscout check reads `ok`.
        globalThis.fetch.mockResolvedValue({
            ok: true,
            json: async () => ({ result: NETWORKS.sepolia.chainId }),
        });
        const rpcUrl = "https://own-node.example.invalid";
        const blockscoutUrl = "https://own-explorer.example.invalid/api/v2";

        page.node("settings-rpc").value = rpcUrl;
        await page.click("btn-save-rpc");
        expect(page.text("flash-msg")).toBe("Saved.");
        page.node("settings-blockscout").value = blockscoutUrl;
        await page.click("btn-save-blockscout");
        expect(page.text("flash-msg")).toBe("Saved.");

        const stored = page.storage.read("autistmask");
        expect(stored.networkId).toBe("sepolia");
        expect(stored.rpcUrl).toBe(rpcUrl);
        expect(stored.blockscoutUrl).toBe(blockscoutUrl);
    },
);

// The user picks Sepolia in Settings, but the switch's write fails. The page is
// then on Sepolia, while Settings was last drawn for Ethereum Mainnet. A "Save"
// after the failed switch stores nothing for either network.
test.each([
    { button: "btn-save-rpc", field: "settings-rpc" },
    { button: "btn-save-blockscout", field: "settings-blockscout" },
])(
    "$button saves nothing after a switch in Settings whose write failed",
    async ({ button, field }) => {
        const page = await bootOnAddress();
        await page.click("btn-settings");
        page.storage.local.set.mockRejectedValueOnce(
            new Error("quota exceeded"),
        );
        const select = page.node("settings-network");
        select.value = "sepolia";
        for (const fn of select.listeners.change) {
            await expect(fn()).rejects.toThrow("quota exceeded");
        }
        await page.settle();
        const { state } = require("../src/shared/state");
        expect(state.networkId).toBe("sepolia");
        // This answer passes both endpoint checks on Ethereum Mainnet.
        globalThis.fetch.mockResolvedValue({
            ok: true,
            json: async () => ({ result: NETWORKS.mainnet.chainId }),
        });
        const url = "https://own-node.example.invalid";

        page.node(field).value = url;
        await page.click(button);

        expect(JSON.stringify(page.storage.read("autistmask"))).not.toContain(
            url,
        );
        expect(page.text("flash-msg")).toBe(
            "The URL was not saved because the network changed.",
        );
    },
);

// Such as one a newer build wrote, which this build cannot read. Nothing reads
// or writes the stored record for it: the popup's next save finds it, as
// before.
test("a record that names no network is not followed", async () => {
    const page = await bootOnAddress();
    const { get, set } = page.storage.local;
    const reads = get.mock.calls.length;

    await set({
        autistmask: {
            schemaVersion: STATE_SCHEMA_VERSION + 1,
            wallets: [{ type: "hd", name: "Main", addresses: [] }],
        },
    });
    await page.settle();

    expect(get).toHaveBeenCalledTimes(reads);
    expect(page.visibleViews()).toEqual(["address"]);
});

// A record that takes the switch from the switched record ends up as that
// record, balances the background fetched since included.
test("copyChainSwitchFields() takes every field applyChainSwitchFields() sets", () => {
    const before = unversionedValidProfile({
        trackedTokens: [MAINNET_TOKEN],
        networkTrackedTokens: { sepolia: [SEPOLIA_TOKEN] },
        networkEndpoints: {
            sepolia: {
                rpcUrl: "http://127.0.0.1:8545",
                blockscoutUrl: "http://127.0.0.1:4000/api/v2",
            },
        },
        lastBalanceRefresh: 1,
        tokenHolderCache: { [MAINNET_TOKEN.address]: 5000 },
        fraudContracts: ["0x1111111111111111111111111111111111111111"],
    });
    const switched = structuredClone(before);
    applyChainSwitchFields(switched, "sepolia");
    switched.wallets[0].addresses[0].balance = "2.0";

    const follower = structuredClone(before);
    copyChainSwitchFields(follower, switched);

    expect(follower).toEqual(switched);
});