import { expect, test } from "bun:test";
import type { Plugin } from "@opencode/plugin/tui";
import type { Route, SlotMap } from "@opencode/plugin/tui/context";
import { testRender, type JSX } from "@opentui/solid";
import { createSignal } from "solid-js";
import { build } from "../scripts/build.js";
import type { QuotaStatus } from "../src/quota.js";

type SidebarSlotRender = (input: { readonly sessionID: string }) => JSX.Element;
type HomeSlotRender = (input: SlotMap["prompt.footer"]) => JSX.Element;

const status = (plan: string, remaining: number): QuotaStatus => ({
    plan,
    fetchedAt: 1,
    windows: [
        {
            id: "codex:primary",
            label: null,
            seconds: 18_000,
            used: 100 - remaining,
            resetsAt: 2,
            remaining,
        },
    ],
});

test("built quota slot stays reactive across pending, empty, failure, update, and session states", async () => {
    await build();
    // Resolve the built bundle at runtime; tsc runs before build creates dist/tui.js.
    const tui: typeof import("../src/tui.js") = await import(
        new URL("../dist/tui.js", import.meta.url).href
    );
    const { default: plugin } = tui;
    const pending = Promise.withResolvers<QuotaStatus | null>();
    const responses: Array<() => Promise<QuotaStatus | null>> = [
        async () => status("home", 90),
        () => pending.promise,
    ];
    let statusCalls = 0;
    let sidebarRender: SidebarSlotRender | undefined;
    let homeRender: HomeSlotRender | undefined;
    let notifyUpdated: (() => void) | undefined;
    const [route, setRoute] = createSignal<Route>({ type: "home" });

    const quota = {
        status() {
            statusCalls++;
            const response = responses.shift();
            if (!response) throw new Error("Missing test response");
            return response();
        },
        events: {
            on(_event: "updated", callback: () => void) {
                notifyUpdated = callback;
                return () => undefined;
            },
        },
    };
    const contextFixture = {
        client: { rpc: () => quota },
        ui: {
            slot(claim: {
                after?: "prompt.footer";
                append?: "sidebar.footer";
                render: HomeSlotRender | SidebarSlotRender;
            }) {
                if (claim.after === "prompt.footer") {
                    // SAFETY: The prompt footer renderer receives the matching slot input.
                    homeRender = claim.render as HomeSlotRender;
                } else {
                    // SAFETY: The only other fixture path is the session-aware sidebar slot.
                    sidebarRender = claim.render as SidebarSlotRender;
                }
                return () => undefined;
            },
            router: { current: route },
        },
        theme: { text: { default: "#ffffff", muted: "#888888" } },
    };
    // SAFETY: The slot setup only reads the client RPC, slot registration, and theme
    // members implemented by this focused rendering fixture.
    const context = Object.assign({} as Plugin.Context, contextFixture);
    const cleanup = await plugin.setup(context);
    if (!sidebarRender || !homeRender || !notifyUpdated)
        throw new Error("Plugin did not register its slots");

    const renderHome = homeRender;
    const home = await testRender(() => renderHome({ mode: "normal", showDetails: false }), {
        width: 40,
        height: 6,
    });
    await home.waitForFrame((frame) => frame.includes("ChatGPT quota (home)"));
    const homeFrame = home.captureCharFrame();
    expect(homeFrame.split("\n")).toEqual([
        "                                        ",
        "                                        ",
        "          ChatGPT quota (home)          ",
        "          5h: 90% · due                 ",
        "                                        ",
        "                                        ",
        "",
    ]);
    expect(statusCalls).toBe(1);
    home.renderer.destroy();

    setRoute({ type: "session", sessionID: "session-one" });
    const sessionPrompt = await testRender(
        () =>
            renderHome({
                sessionID: "session-one",
                mode: "normal",
                showDetails: false,
            }),
        { width: 40, height: 5 },
    );
    await sessionPrompt.renderOnce();
    expect(sessionPrompt.captureCharFrame()).not.toContain("ChatGPT quota");
    expect(statusCalls).toBe(1);
    sessionPrompt.renderer.destroy();

    const [sessionID, setSessionID] = createSignal("session-one");
    const renderSlot = sidebarRender;
    const setup = await testRender(
        () =>
            renderSlot({
                get sessionID() {
                    return sessionID();
                },
            }),
        { width: 70, height: 5 },
    );

    try {
        await setup.renderOnce();
        expect(setup.captureCharFrame()).not.toContain("ChatGPT quota");

        pending.resolve(status("plus", 75));
        await setup.waitForFrame((frame) => frame.includes("ChatGPT quota (plus)"));
        expect(setup.captureCharFrame()).toContain("5h: 75% · due");
        expect(setup.captureCharFrame()).not.toContain("~");

        responses.push(async () => null);
        notifyUpdated();
        await setup.waitForFrame((frame) => !frame.includes("ChatGPT quota"));

        responses.push(async () => {
            throw new Error("disconnected");
        });
        notifyUpdated();
        await setup.waitFor(() => statusCalls === 4);
        expect(setup.captureCharFrame()).not.toContain("ChatGPT quota");

        responses.push(async () => status("pro", 42));
        setSessionID("session-two");
        await setup.waitForFrame((frame) => frame.includes("ChatGPT quota (pro)"));
        expect(statusCalls).toBe(5);
    } finally {
        setup.renderer.destroy();
        if (cleanup) await cleanup();
    }
});