import { describe, expect, it, vi, afterEach } from "vitest";
import { registerSetupProtocolHandler, useSetupProtocolFeature } from "./setupProtocol";
import { encodeTimeBoundSetupURI } from "@vrtmrz/livesync-commonlib/setup-uri";
import { DEFAULT_SETTINGS } from "@vrtmrz/livesync-commonlib/compat/common/types";

vi.mock("@/common/types", () => {
    return {
        configURIBase: "mock-config://",
    };
});

vi.mock("@/modules/features/SetupManager", () => {
    return {
        UserMode: {
            Unknown: "unknown",
            Update: "unknown",
        },
    };
});

describe("setupObsidian/setupProtocol", () => {
    afterEach(() => {
        vi.restoreAllMocks();
        vi.clearAllMocks();
    });

    it("registerSetupProtocolHandler should route settings payload to onUseSetupURI", async () => {
        let protocolHandler: ((params: Record<string, string>) => Promise<void>) | undefined;
        const host = {
            services: {
                API: {
                    registerProtocolHandler: vi.fn(
                        (_action: string, handler: (params: Record<string, string>) => Promise<void>) => {
                            protocolHandler = handler;
                        }
                    ),
                },
            },
        } as any;
        const log = vi.fn();
        const setupManager = {
            onUseSetupURI: vi.fn(async () => await Promise.resolve(true)),
            decodeQR: vi.fn(async () => await Promise.resolve(true)),
        } as any;

        registerSetupProtocolHandler(host, log, setupManager);
        expect(host.services.API.registerProtocolHandler).toHaveBeenCalledWith("setuplivesync", expect.any(Function));

        await protocolHandler!({ settings: "a b" });
        expect(setupManager.onUseSetupURI).toHaveBeenCalledWith(
            "unknown",
            `mock-config://${encodeURIComponent("a b")}`
        );
        expect(setupManager.decodeQR).not.toHaveBeenCalled();
    });

    it.each(["ephemeral", "persistent"] as const)(
        "reconstructs the exact encrypted %s URI after protocol query decoding",
        async (mode) => {
            let protocolHandler: ((params: Record<string, string>) => Promise<void>) | undefined;
            const host = {
                services: {
                    API: {
                        registerProtocolHandler: vi.fn(
                            (_action: string, handler: (params: Record<string, string>) => Promise<void>) => {
                                protocolHandler = handler;
                            }
                        ),
                    },
                },
            } as any;
            const setupManager = { onUseSetupURI: vi.fn(async () => true), decodeQR: vi.fn() } as any;
            registerSetupProtocolHandler(host, vi.fn(), setupManager);

            const generated = await encodeTimeBoundSetupURI(DEFAULT_SETTINGS, "protocol-passphrase", { mode });
            const decodedQuery = new URL(generated.uri.trim()).searchParams.get("settings");
            expect(decodedQuery?.startsWith("%$")).toBe(true);
            await protocolHandler!({ settings: decodedQuery! });
            const reconstructed = setupManager.onUseSetupURI.mock.calls[0][1] as string;
            expect(reconstructed.replace("mock-config://", "obsidian://setuplivesync?settings=")).toBe(
                generated.uri.trim()
            );
        }
    );

    it("registerSetupProtocolHandler should route settingsQR payload to decodeQR", async () => {
        let protocolHandler: ((params: Record<string, string>) => Promise<void>) | undefined;
        const host = {
            services: {
                API: {
                    registerProtocolHandler: vi.fn(
                        (_action: string, handler: (params: Record<string, string>) => Promise<void>) => {
                            protocolHandler = handler;
                        }
                    ),
                },
            },
        } as any;
        const log = vi.fn();
        const setupManager = {
            onUseSetupURI: vi.fn(async () => await Promise.resolve(true)),
            decodeQR: vi.fn(async () => await Promise.resolve(true)),
        } as any;

        registerSetupProtocolHandler(host, log, setupManager);
        await protocolHandler!({ settingsQR: "qr-data" });

        expect(setupManager.decodeQR).toHaveBeenCalledWith("qr-data");
        expect(setupManager.onUseSetupURI).not.toHaveBeenCalled();
    });

    it("registerSetupProtocolHandler should log and continue when registration throws", () => {
        const host = {
            services: {
                API: {
                    registerProtocolHandler: vi.fn(() => {
                        throw new Error("register failed");
                    }),
                },
            },
        } as any;
        const log = vi.fn();
        const setupManager = {
            onUseSetupURI: vi.fn(),
            decodeQR: vi.fn(),
        } as any;

        registerSetupProtocolHandler(host, log, setupManager);

        expect(log).toHaveBeenCalledTimes(2);
    });

    it("useSetupProtocolFeature should register onLoaded handler", async () => {
        const addHandler = vi.fn();
        const registerProtocolHandler = vi.fn();
        const host = {
            services: {
                API: {
                    addLog: vi.fn(),
                    registerProtocolHandler,
                },
                appLifecycle: {
                    onLoaded: {
                        addHandler,
                    },
                },
            },
        } as any;
        const setupManager = {
            onUseSetupURI: vi.fn(),
            decodeQR: vi.fn(),
        } as any;

        useSetupProtocolFeature(host, setupManager);
        expect(addHandler).toHaveBeenCalledTimes(1);

        const loadedHandler = addHandler.mock.calls[0][0] as () => Promise<boolean>;
        await loadedHandler();

        expect(registerProtocolHandler).toHaveBeenCalledWith("setuplivesync", expect.any(Function));
    });
});