import { describe, expect, it, vi } from "vitest";
import { buildReinjectDiagSnapshot, notifyReinjectDiag } from "../src/diag.js";
import { createDefaultSettings } from "../src/settings.js";
import { createInitialState } from "../src/state.js";

describe("buildReinjectDiagSnapshot", () => {
	it("collects tracked, kept, registered, planned, and pending", () => {
		const state = createInitialState();
		state.skills.push({
			name: "alpha",
			filePath: "/skills/alpha/SKILL.md",
			baseDir: "/skills/alpha",
			firstSeenAt: 1,
			lastSeenAt: 1,
			sources: ["slash"],
		});
		state.pendingReinject = ["alpha"];

		expect(
			buildReinjectDiagSnapshot(
				state,
				[{ name: "beta" }],
				new Set(["gamma"]),
				["alpha"],
				{
					compactionSource: "auto",
					sourceInferred: true,
					deliveryBranch: "steer",
					isIdle: false,
				},
			),
		).toEqual({
			tracked: ["alpha"],
			kept: ["gamma"],
			registered: ["beta"],
			planned: ["alpha"],
			pending: ["alpha"],
			compactionSource: "auto",
			sourceInferred: true,
			deliveryBranch: "steer",
			isIdle: false,
		});
	});
});

describe("notifyReinjectDiag", () => {
	it("no-ops when debug is off", () => {
		const notify = vi.fn();
		notifyReinjectDiag(
			{
				hasUI: true,
				ui: { notify },
			} as never,
			createDefaultSettings(),
			"session_compact",
			{
				tracked: [],
				kept: [],
				registered: [],
				planned: [],
				pending: [],
			},
		);
		expect(notify).not.toHaveBeenCalled();
	});

	it("notifies with JSON snapshot when debug is on", () => {
		const notify = vi.fn();
		const stderrSpy = vi.spyOn(console, "error").mockImplementation(() => {});
		const settings = { ...createDefaultSettings(), debug: true };
		const snapshot = {
			tracked: ["a"],
			kept: [],
			registered: [],
			planned: ["a"],
			pending: ["a"],
		};
		notifyReinjectDiag(
			{
				hasUI: true,
				ui: { notify },
			} as never,
			settings,
			"before_agent_start",
			snapshot,
		);
		expect(stderrSpy).toHaveBeenCalledWith(
			`skill-reinject [before_agent_start]: ${JSON.stringify(snapshot)}`,
		);
		expect(notify).toHaveBeenCalledWith(
			`skill-reinject [before_agent_start]: ${JSON.stringify(snapshot)}`,
			"info",
		);
		stderrSpy.mockRestore();
	});
});