// A persisted container that is checked while its ENTRIES are dereferenced
// unchecked (https://git.eeqj.de/sneak/AutistMask/issues/362).
//
// https://git.eeqj.de/sneak/AutistMask/issues/311 settled the idiom — floor the
// container AND its entries, dropping anything that cannot be safely
// dereferenced — and applied it to trackedTokens and tokenBalances. These are
// the fields it did not reach.
//
// allowedSites is the worst shape in the codebase, and it is what the boot
// tests below measure: a stored `{"0x…": "notalist"}` passes the gate, renders
// a WORKING popup, and then throws `base.map is not a function` inside
// saveState()'s merge — so every save from then on fails while the UI looks
// entirely healthy and the user goes on operating a wallet that is persisting
// nothing. A blank popup is at least visibly broken; this is not. So the
// assertion here is never merely "the popup rendered": it is "the popup
// rendered AND the write actually landed in storage".
//
// Observed at ad6aa7b, with the floors below removed:
//   allowedSites: {"0x…": "notalist"}   -> views=["main"], errors=[], and
//       storage.set NEVER called: the stored record kept no schemaVersion, so
//       nothing the user did was persisted.
//   fraudContracts: "0x…"               -> renderSendTokenSelect() threw
//       "(state.fraudContracts || []).map is not a function"
//   fraudContracts: [42]                -> threw "a.toLowerCase is not a
//       function"
//   selectedToken: 42 (restoring onto address-token) -> views=[], errors=
//       ["tokenId.toLowerCase is not a function"] — a blank popup.

const { normalizePersisted } = require("../src/shared/persistedState");
const { makeStorageStub } = require("./support/storageStub");
const {
    bootPopup,
    cleanupPopup,
    unversionedValidProfile,
    ADDRESS,
    TOKEN_ADDRESS,
} = require("./support/popupBoot");

// One extension page: a fresh module registry over the given storage. state.js
// resolves the storage API at require time, so the stub has to be installed
// before the module is loaded.
function loadStateModule(storage) {
    jest.resetModules();
    globalThis.chrome = { storage: { local: storage.local } };
    return require("../src/shared/state");
}

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

// ------------------------------------------------------- the floor itself

describe("the floor under allowedSites and deniedSites", () => {
    for (const field of ["allowedSites", "deniedSites"]) {
        test(`${field} that is not a record becomes an empty record`, () => {
            for (const bad of ["nope", 42, true, [ADDRESS], null]) {
                expect(normalizePersisted({ [field]: bad })[field]).toEqual({});
            }
        });

        test(`an ${field} entry whose value is not a hostname list is dropped`, () => {
            for (const bad of ["dapp.example", 42, null, { a: 1 }, true]) {
                expect(
                    normalizePersisted({ [field]: { [ADDRESS]: bad } })[field],
                ).toEqual({});
            }
        });

        test(`a hostname that is not text is dropped from an ${field} entry`, () => {
            expect(
                normalizePersisted({
                    [field]: { [ADDRESS]: [42, null, "dapp.example", {}] },
                })[field],
            ).toEqual({ [ADDRESS]: ["dapp.example"] });
        });

        test(`a real ${field} map survives, copied not shared`, () => {
            const saved = { [field]: { [ADDRESS]: ["dapp.example"] } };

            const out = normalizePersisted(saved);

            expect(out[field]).toEqual(saved[field]);
            expect(out[field]).not.toBe(saved[field]);
            expect(out[field][ADDRESS]).not.toBe(saved[field][ADDRESS]);
        });

        test(`a good ${field} entry beside a malformed one survives`, () => {
            const out = normalizePersisted({
                [field]: { [ADDRESS]: ["dapp.example"], [TOKEN_ADDRESS]: 42 },
            });

            expect(out[field]).toEqual({ [ADDRESS]: ["dapp.example"] });
        });

        test(`a stored own "__proto__" key in ${field} is dropped`, () => {
            // JSON can carry the key. It can never be a wallet address, so it
            // grants and denies nothing and goes the way of every other key
            // whose value is unusable; keeping it would only keep a value that
            // saveState()'s merge hands to the prototype setter on the next
            // write.
            const saved = JSON.parse(
                '{"' + field + '":{"__proto__":["evil.invalid"]}}',
            );

            const out = normalizePersisted(saved);

            expect(Object.getPrototypeOf(out[field])).toBe(Object.prototype);
            expect(Object.keys(out[field])).toEqual([]);
        });
    }
});

describe('a stored own "__proto__" key surviving a save', () => {
    // The floor writes map keys with defineProperty; saveState()'s merge is one
    // layer downstream of it and used to write them with plain assignment,
    // which hands "__proto__" to the prototype setter and records no entry.
    // networkEndpoints is where a key that is not a known id is deliberately
    // KEPT, so it is where that undoing shows.
    test("does not move a prototype or vanish from networkEndpoints", async () => {
        const profile = unversionedValidProfile();
        profile.networkEndpoints = JSON.parse(
            '{"__proto__":{"rpcUrl":"https://kept.invalid"}}',
        );
        const storage = makeStorageStub({ autistmask: profile });
        const { state, loadState, saveState } = loadStateModule(storage);

        await loadState();
        state.theme = "dark";
        await saveState();

        // Not compared against Object.prototype by identity: the storage stub
        // clones through structuredClone, which builds the result in the host
        // realm, so the two Object.prototypes are different objects.
        const stored = storage.read("autistmask").networkEndpoints;
        expect(Object.getPrototypeOf(stored).rpcUrl).toBeUndefined();
        expect(Object.keys(stored)).toContain("__proto__");
    });
});

describe("the floor under fraudContracts", () => {
    test("fraudContracts that is not a list becomes an empty list", () => {
        for (const bad of ["nope", 42, true, { a: 1 }]) {
            expect(
                normalizePersisted({ fraudContracts: bad }).fraudContracts,
            ).toEqual([]);
        }
    });

    test("a fraudContracts entry that is not text is dropped", () => {
        expect(
            normalizePersisted({
                fraudContracts: [42, null, TOKEN_ADDRESS, {}, []],
            }).fraudContracts,
        ).toEqual([TOKEN_ADDRESS]);
    });

    test("a real fraudContracts list survives, copied not shared", () => {
        const saved = { fraudContracts: [TOKEN_ADDRESS] };

        const out = normalizePersisted(saved);

        expect(out.fraudContracts).toEqual(saved.fraudContracts);
        expect(out.fraudContracts).not.toBe(saved.fraudContracts);
    });
});

describe("the floor under selectedToken", () => {
    // Found by the sweep for this defect class, not named in the issue: the
    // restore gate in src/popup/viewRouter.js checks truthiness only, and both
    // src/popup/views/addressToken.js and src/popup/views/receive.js then
    // dereference it as text.
    test("a selectedToken that is not text becomes null", () => {
        for (const bad of [42, true, { a: 1 }, [TOKEN_ADDRESS]]) {
            expect(
                normalizePersisted({ selectedToken: bad }).selectedToken,
            ).toBeNull();
        }
    });

    test("a real selectedToken survives; the empty string becomes null", () => {
        expect(
            normalizePersisted({ selectedToken: TOKEN_ADDRESS }).selectedToken,
        ).toBe(TOKEN_ADDRESS);
        expect(normalizePersisted({ selectedToken: "ETH" }).selectedToken).toBe(
            "ETH",
        );
        expect(
            normalizePersisted({ selectedToken: "" }).selectedToken,
        ).toBeNull();
    });
});

// ----------------------------------------- what the user actually gets

describe("a malformed allowedSites entry", () => {
    const MALFORMED = [
        { name: "a string", value: "notalist" },
        { name: "a number", value: 42 },
        { name: "a record", value: { hostnames: ["dapp.example"] } },
    ];

    for (const { name, value } of MALFORMED) {
        test(`whose value is ${name}: a working popup whose writes persist`, async () => {
            const env = await bootPopup(
                unversionedValidProfile({
                    allowedSites: { [ADDRESS]: value },
                }),
            );

            expect({
                visibleViews: env.visibleViews(),
                errors: env.pageErrors,
            }).toEqual({ visibleViews: ["main"], errors: [] });

            // The half that matters. A popup that renders and never persists
            // again is worse than one that renders nothing, because nothing
            // tells the user. The version stamp is proof a write landed: it
            // is absent from the stored record until saveState() writes one.
            expect(env.storage.set).toHaveBeenCalled();
            const stored = env.storage.read("autistmask");
            expect(stored.schemaVersion).toBe(1);
            expect(stored.wallets[0].encryptedSecret).toBe(
                "encrypted-secret-1",
            );
            expect(stored.allowedSites).toEqual({});
        });
    }

    test("the well-formed entries beside it keep working", async () => {
        const env = await bootPopup(
            unversionedValidProfile({
                allowedSites: {
                    [ADDRESS]: ["dapp.example"],
                    [TOKEN_ADDRESS]: "notalist",
                },
            }),
        );

        expect(env.pageErrors).toEqual([]);
        expect(env.storage.read("autistmask").allowedSites).toEqual({
            [ADDRESS]: ["dapp.example"],
        });
    });

    test("a later save still lands, not just the first", async () => {
        // The failure this closes was in the MERGE, which runs on every save
        // against whatever is in storage at the time. One write landing is not
        // enough: the field has to stay mergeable.
        const storage = makeStorageStub({
            autistmask: unversionedValidProfile({
                allowedSites: { [ADDRESS]: "notalist" },
            }),
        });
        const { state, loadState, saveState } = loadStateModule(storage);

        await loadState();
        state.theme = "dark";
        await saveState();
        state.utcTimestamps = true;
        await saveState();

        const stored = storage.read("autistmask");
        expect(stored.theme).toBe("dark");
        expect(stored.utcTimestamps).toBe(true);
        expect(stored.allowedSites).toEqual({});
        expect(stored.wallets[0].encryptedSecret).toBe("encrypted-secret-1");
    });
});

describe("a malformed fraudContracts", () => {
    // The send screen, which is where this one lands: the boot path only
    // reaches fraudContracts through loadHomeTxs(), which catches, so the
    // consequence is an unusable send screen rather than silent data loss.
    function stubSendDocument() {
        const select = { innerHTML: "", children: [] };
        select.appendChild = (child) => select.children.push(child);
        globalThis.document = {
            getElementById: (id) => (id === "send-token" ? select : null),
            createElement: () => ({ value: "", textContent: "" }),
        };
        return select;
    }

    const HELD = {
        address: TOKEN_ADDRESS,
        symbol: "AAA",
        decimals: 18,
        balance: "12.5",
        holders: 50000,
    };

    async function sendScreenTokens(fraudContracts) {
        const storage = makeStorageStub({
            autistmask: unversionedValidProfile({ fraudContracts }),
        });
        const { loadState } = loadStateModule(storage);
        await loadState();
        const select = stubSendDocument();
        const { renderSendTokenSelect } = require("../src/popup/views/send");

        renderSendTokenSelect({ address: ADDRESS, tokenBalances: [HELD] });

        return select.children.map((opt) => opt.value);
    }

    for (const bad of ["notalist", 42, { a: 1 }, [42], [null], [{}]]) {
        test(`${JSON.stringify(bad)}: a usable send screen`, async () => {
            await expect(sendScreenTokens(bad)).resolves.toEqual([
                TOKEN_ADDRESS,
            ]);
        });
    }

    test("a real fraud entry beside a malformed one still hides its token", async () => {
        await expect(
            sendScreenTokens([42, TOKEN_ADDRESS.toLowerCase()]),
        ).resolves.toEqual([]);
    });
});

describe("a malformed selectedToken", () => {
    test("does not blank the popup on restore", async () => {
        const env = await bootPopup(
            unversionedValidProfile({
                currentView: "address-token",
                selectedWallet: 0,
                selectedAddress: 0,
                selectedToken: 42,
                viewStack: ["main", "address"],
            }),
        );

        expect({
            visibleViews: env.visibleViews(),
            errors: env.pageErrors,
        }).toEqual({ visibleViews: ["main"], errors: [] });
    });
});

// --------------------------------------------- a save that fails is told

describe("a save that fails", () => {
    function failingStorage(profile) {
        const storage = makeStorageStub({ autistmask: profile });
        const realSet = storage.local.set;
        storage.local.set = jest.fn(async () => {
            throw new Error("QUOTA_BYTES quota exceeded");
        });
        storage.restoreWrites = () => {
            storage.local.set = realSet;
        };
        return storage;
    }

    test("is reported, not swallowed by the save queue", async () => {
        const storage = failingStorage(unversionedValidProfile());
        const { state, loadState, saveState, onSaveFailure } =
            loadStateModule(storage);
        const failures = [];
        onSaveFailure((e) => failures.push(String(e && e.message)));

        await loadState();
        state.theme = "dark";
        // Not awaited, which is how showView() saves on every navigation and
        // how the failure used to disappear entirely.
        saveState();
        for (let i = 0; i < 50; i++) await Promise.resolve();

        expect(failures).toEqual(["QUOTA_BYTES quota exceeded"]);
    });

    test("still rejects for a caller that awaits it", async () => {
        const storage = failingStorage(unversionedValidProfile());
        const { state, loadState, saveState, onSaveFailure } =
            loadStateModule(storage);
        onSaveFailure(() => {});

        await loadState();
        state.theme = "dark";

        await expect(saveState()).rejects.toThrow("QUOTA_BYTES");
    });

    test("puts a banner on the popup saying nothing is being saved", async () => {
        const env = await bootPopup(undefined, {
            storage: failingStorage(unversionedValidProfile()),
        });

        // The popup is still usable — the point is that it no longer looks
        // healthy while silently persisting nothing.
        expect(env.visibleViews()).toEqual(["main"]);
        const banner = env.node("save-failure-banner");
        expect(banner).not.toBeNull();
        expect(banner.textContent).toContain("NOT SAVED");
        expect(banner.textContent).toContain("QUOTA_BYTES quota exceeded");
    });

    test("no banner appears on a popup whose saves work", async () => {
        const env = await bootPopup(unversionedValidProfile());

        expect(env.node("save-failure-banner")).toBeNull();
    });
});