import { afterEach, beforeAll, beforeEach, describe, expect, it } from "bun:test";
import { resetSettingsForTest, Settings, settings } from "@oh-my-pi/pi-coding-agent/config/settings";
import { SettingsSelectorComponent } from "@oh-my-pi/pi-coding-agent/modes/components/settings-selector";
import { initTheme } from "@oh-my-pi/pi-coding-agent/modes/theme/theme";

beforeAll(async () => {
	await initTheme();
});

beforeEach(async () => {
	resetSettingsForTest();
	await Settings.init({ inMemory: true });
});

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

function createSelector(): SettingsSelectorComponent {
	return new SettingsSelectorComponent(
		{
			availableThinkingLevels: [],
			thinkingLevel: undefined,
			availableThemes: ["dark"],
			cwd: process.cwd(),
		},
		{
			onChange: () => {},
			onCancel: () => {},
		},
	);
}

/** Switch the selector to the memory tab. SETTING_TABS puts memory at index 4 (after appearance/model/interaction/context). */
function focusMemoryTab(comp: SettingsSelectorComponent): void {
	for (let i = 0; i < 4; i++) {
		comp.handleInput("\x1b[C");
	}
}

describe("SettingsSelectorComponent memory tab", () => {
	it("reveals condition-gated Hindsight rows the moment memory.backend changes via the submenu", () => {
		settings.set("memory.backend", "off");
		const comp = createSelector();
		focusMemoryTab(comp);

		const before = comp.render(120).join("\n");
		expect(before).toContain("Memory Backend");
		expect(before).not.toContain("Hindsight API URL");

		// Memory Backend is the only visible row, so it's already selected at index 0.
		// Enter opens the SelectSubmenu pre-positioned on "off"; navigate to "hindsight" (index 2) and confirm.
		comp.handleInput("\n");
		comp.handleInput("\x1b[B");
		comp.handleInput("\x1b[B");
		comp.handleInput("\n");

		expect(settings.get("memory.backend")).toBe("hindsight");
		const after = comp.render(120).join("\n");
		expect(after).toContain("Memory Backend");
		expect(after).toContain("Hindsight API URL");
		expect(after).toContain("Hindsight Auto Recall");
	});

	it("hides Hindsight rows again when the backend is switched back to off without leaving the tab", () => {
		settings.set("memory.backend", "hindsight");
		const comp = createSelector();
		focusMemoryTab(comp);

		expect(comp.render(120).join("\n")).toContain("Hindsight API URL");

		// Open Memory Backend → SelectSubmenu pre-selects the current value
		// ("hindsight" at index 2) → step up twice to reach "off" → Enter confirms.
		comp.handleInput("\n");
		comp.handleInput("\x1b[A");
		comp.handleInput("\x1b[A");
		comp.handleInput("\n");

		expect(settings.get("memory.backend")).toBe("off");
		const after = comp.render(120).join("\n");
		expect(after).toContain("Memory Backend");
		expect(after).not.toContain("Hindsight API URL");
		expect(after).not.toContain("Hindsight Auto Recall");
	});
});