import { describe, expect, it } from "vitest";
import { aggregatePatterns } from "../../../../src/application/patterns/aggregate-patterns.js";
import type { Pattern } from "../../src/shared/value-objects/pattern.js";

describe("aggregatePatterns", () => {
	it("should filter patterns below minimum count", () => {
		const patterns: Pattern[] = [
			{ sequence: ["Read", "Edit"], count: 2, sessions: 2, projects: 1, lastSeen: "2026-03-21" },
			{ sequence: ["Grep", "Edit"], count: 5, sessions: 4, projects: 2, lastSeen: "2026-03-21" },
		];
		const result = aggregatePatterns(patterns, { minCount: 3 });
		expect(result).toHaveLength(1);
		expect(result[0].sequence).toEqual(["Grep", "Edit"]);
	});

	it("should filter framework noise (patterns in 80%+ sessions)", () => {
		const patterns: Pattern[] = [
			{ sequence: ["Read", "Read"], count: 50, sessions: 45, projects: 5, lastSeen: "2026-03-21" },
			{ sequence: ["Read", "Edit"], count: 10, sessions: 8, projects: 3, lastSeen: "2026-03-21" },
		];
		const result = aggregatePatterns(patterns, {
			minCount: 3,
			totalSessions: 50,
			noiseThreshold: 0.8,
		});
		expect(result).toHaveLength(1);
		expect(result[0].sequence).toEqual(["Read", "Edit"]);
	});

	it("should filter patterns below configurable minCount", () => {
		const patterns: Pattern[] = [
			{
				sequence: ["Read", "Edit"],
				count: 2,
				sessions: 2,
				projects: 1,
				lastSeen: new Date().toISOString(),
			},
			{
				sequence: ["Read", "Write"],
				count: 5,
				sessions: 3,
				projects: 2,
				lastSeen: new Date().toISOString(),
			},
		];
		const result = aggregatePatterns(patterns, { minCount: 4 });
		expect(result).toHaveLength(1);
		expect(result[0].sequence).toEqual(["Read", "Write"]);
	});

	it("should pass through patterns meeting all criteria", () => {
		const patterns: Pattern[] = [
			{
				sequence: ["Read", "Grep", "Edit"],
				count: 12,
				sessions: 8,
				projects: 3,
				lastSeen: "2026-03-21",
			},
		];
		const result = aggregatePatterns(patterns, {
			minCount: 3,
			totalSessions: 20,
			noiseThreshold: 0.8,
		});
		expect(result).toHaveLength(1);
	});
});