import { describe, expect, it } from "vitest";
import { planDeferredReinject, planReinject } from "../src/reinject.js";
import { createDefaultSettings } from "../src/settings.js";
import { createInitialState, trackSkill } from "../src/state.js";

describe("B-002 pre-fix filter hypothesis", () => {
	it("planned empty when skill stays in kept window even if registered", () => {
		const state = createInitialState();
		trackSkill(state, {
			name: "fup-blame-commits",
			filePath: "/home/user/.cursor/skills/fup-blame-commits/SKILL.md",
			baseDir: "/home/user/.cursor/skills/fup-blame-commits",
			source: "slash",
		});

		const branch = [
			{
				id: "keep-1",
				type: "message",
				message: {
					role: "user",
					content:
						'<skill name="fup-blame-commits" location="/path/SKILL.md">\nbody\n</skill>',
				},
			},
		] as never;

		const planned = planReinject(
			state,
			createDefaultSettings(),
			{
				sessionManager: { getBranch: () => branch },
			} as never,
			{ compactionEntry: { firstKeptEntryId: "keep-1" } } as never,
			[{ name: "fup-blame-commits" }],
		);

		expect(planned).toEqual([]);
	});

	it("pre-fix: registered empty drops skill even when absent from kept (post-fix should reinject)", () => {
		const state = createInitialState();
		trackSkill(state, {
			name: "fup-blame-commits",
			filePath: "/home/user/.cursor/skills/fup-blame-commits/SKILL.md",
			baseDir: "/home/user/.cursor/skills/fup-blame-commits",
			source: "skill-block",
		});

		const branch = [
			{
				id: "keep-1",
				type: "message",
				message: { role: "user", content: "plain text after compact" },
			},
		] as never;

		const planned = planReinject(
			state,
			createDefaultSettings(),
			{
				sessionManager: { getBranch: () => branch },
			} as never,
			{ compactionEntry: { firstKeptEntryId: "keep-1" } } as never,
			[],
		);

		expect(planned).toEqual([]);
	});

	it("defer plan includes skill absent from kept even when registered is empty", () => {
		const state = createInitialState();
		trackSkill(state, {
			name: "fup-blame-commits",
			filePath: "/home/user/.cursor/skills/fup-blame-commits/SKILL.md",
			baseDir: "/home/user/.cursor/skills/fup-blame-commits",
			source: "skill-block",
		});

		const branch = [
			{
				id: "keep-1",
				type: "message",
				message: { role: "user", content: "plain text after compact" },
			},
		] as never;

		const planned = planDeferredReinject(
			state,
			{
				sessionManager: { getBranch: () => branch },
			} as never,
			{ compactionEntry: { firstKeptEntryId: "keep-1" } } as never,
		);

		expect(planned).toEqual(["fup-blame-commits"]);
	});
});