import { describe, expect, it } from "@suaveplan/testing/runner";
import { Libp2pServer } from "../src/server/server.js";
import {
    FakeLibp2pHub,
    FakeLibp2pServerNode,
    makeFakeServerFactory,
} from "./setup/fake-libp2p-server.js";

async function fetchJson(
    url: string
): Promise<{ readonly status: number; readonly body: unknown }> {
    const res = await fetch(url);
    const body = await res.json();
    return { status: res.status, body };
}

describe("integration: real HTTP boot + health probes", () => {
    it("health/ready/live respond with 200 while running", {
        timeout: 10_000,
    }, async () => {
        const hub = new FakeLibp2pHub();
        const { factory } = makeFakeServerFactory(hub);
        const server = new Libp2pServer({
            libp2pFactory: factory,
            listen: ["/ip4/0.0.0.0/tcp/0"],
            healthPort: 0,
            healthHost: "127.0.0.1",
        });
        const { healthAddress, healthPort } = await server.start();
        const base = `http://${
            healthAddress === "::" || healthAddress === "0.0.0.0"
                ? "127.0.0.1"
                : healthAddress
        }:${healthPort}`;
        try {
            const health = await fetchJson(`${base}/health`);
            expect(health.status).toBe(200);
            expect((health.body as { status: string }).status).toBe("ok");

            const ready = await fetchJson(`${base}/ready`);
            expect(ready.status).toBe(200);

            const live = await fetchJson(`${base}/live`);
            expect(live.status).toBe(200);

            // Non-health route falls through to the plaintext marker.
            const fall = await fetch(`${base}/something-else`);
            expect(fall.status).toBe(200);
            expect(await fall.text()).toContain("libp2p");
        } finally {
            await server.stop();
        }
    });

    it("a client dial is recorded as peer-connected end-to-end", {
        timeout: 10_000,
    }, async () => {
        const hub = new FakeLibp2pHub();
        const { factory, instances } = makeFakeServerFactory(hub);
        const server = new Libp2pServer({
            libp2pFactory: factory,
            listen: ["/ip4/0.0.0.0/tcp/0"],
            healthPort: 0,
            healthHost: "127.0.0.1",
        });
        await server.start();
        try {
            const serverNode = instances[0];
            if (!(serverNode instanceof FakeLibp2pServerNode)) {
                throw new Error("expected fake node");
            }
            // A second fake node in the same hub simulates a browser-tier
            // client dialling the server. The hub wires both ends' peer
            // events deterministically.
            const client = new FakeLibp2pServerNode(
                hub,
                {
                    listen: ["/ip4/0.0.0.0/tcp/0"],
                    bootstrap: [],
                    autoRelay: { enabled: false, maxConnections: 100 },
                    maxConnections: 100,
                    protocolId: "/suaveplan/network-server/1.0.0",
                },
                "client-1"
            );
            hub.connectPair(serverNode, client);
            expect(server.peers()).toContain("client-1");
            expect(server.activePeers).toBe(1);
        } finally {
            await server.stop();
        }
    });

    it("server relays a stream observation across two clients", {
        timeout: 10_000,
    }, async () => {
        const hub = new FakeLibp2pHub();
        const { factory, instances } = makeFakeServerFactory(hub);
        const server = new Libp2pServer({
            libp2pFactory: factory,
            listen: ["/ip4/0.0.0.0/tcp/0"],
            healthPort: 0,
            healthHost: "127.0.0.1",
            autoRelay: { enabled: true, maxConnections: 50 },
        });
        await server.start();
        try {
            const serverNode = instances[0];
            if (!(serverNode instanceof FakeLibp2pServerNode)) {
                throw new Error("expected fake node");
            }
            // Two clients sit behind NAT; both connect to the server.
            const a = new FakeLibp2pServerNode(
                hub,
                {
                    listen: ["/ip4/0.0.0.0/tcp/0"],
                    bootstrap: [],
                    autoRelay: { enabled: false, maxConnections: 100 },
                    maxConnections: 100,
                    protocolId: "/suaveplan/network-server/1.0.0",
                },
                "client-A"
            );
            const b = new FakeLibp2pServerNode(
                hub,
                {
                    listen: ["/ip4/0.0.0.0/tcp/0"],
                    bootstrap: [],
                    autoRelay: { enabled: false, maxConnections: 100 },
                    maxConnections: 100,
                    protocolId: "/suaveplan/network-server/1.0.0",
                },
                "client-B"
            );
            hub.connectPair(serverNode, a);
            hub.connectPair(serverNode, b);
            expect(server.peers()).toContain("client-A");
            expect(server.peers()).toContain("client-B");
            // Daemon observes a relayed stream between the two clients.
            server.observeRelayedStream("client-A->client-B");
        } finally {
            await server.stop();
        }
    });

    it("graceful stop closes the inline health listener", {
        timeout: 10_000,
    }, async () => {
        const hub = new FakeLibp2pHub();
        const { factory } = makeFakeServerFactory(hub);
        const server = new Libp2pServer({
            libp2pFactory: factory,
            listen: ["/ip4/0.0.0.0/tcp/0"],
            healthPort: 0,
            healthHost: "127.0.0.1",
        });
        const { healthAddress, healthPort } = await server.start();
        const base = `http://${
            healthAddress === "::" || healthAddress === "0.0.0.0"
                ? "127.0.0.1"
                : healthAddress
        }:${healthPort}`;
        await server.stop();
        await expect(fetch(`${base}/health`)).rejects.toBeDefined();
    });
});