import { describe, it } from "node:test";
import assert from "node:assert";
import { CoveredValues } from "./min-covered";

describe("CoveredValues", () => {
	it("should initialize with the given min value", () => {
		const covered = new CoveredValues(5);
		assert.strictEqual(covered.min, 5);
	});

	it("should add values greater than min", () => {
		const covered = new CoveredValues(0);
		covered.add(3);
		assert.strictEqual(covered.min, 0);
		covered.add(1);
		assert.strictEqual(covered.min, 1);
		covered.add(4);
		assert.strictEqual(covered.min, 1);
		covered.add(2);
		assert.strictEqual(covered.min, 4);
	});

	it("should ignore duplicate values", () => {
		const covered = new CoveredValues(0);
		covered.add(3);
		covered.add(3);
		covered.add(3);
		assert.strictEqual(covered.min, 0);
		covered.add(1);
		covered.add(2);
		assert.strictEqual(covered.min, 3);
	});

	it("should handle multiple consecutive values", () => {
		const covered = new CoveredValues(132);
		for (let i = 250; i > 132; i--) {
			assert.strictEqual(covered.min, 132);
			covered.add(i);
		}
		assert.strictEqual(covered.min, 250);
	});

	it("should handle adding values lower than current min", () => {
		const covered = new CoveredValues(5);
		covered.add(3);
		assert.strictEqual(covered.min, 5);
		covered.add(6);
		assert.strictEqual(covered.min, 6);
	});

	it("should auto-advance when setting min value", () => {
		const covered = new CoveredValues(5);
		covered.add(7);
		covered.add(8);
		covered.add(9);
		assert.strictEqual(covered.min, 5);
		// Setting min to 6 should auto-advance through 7, 8, 9
		covered.min = 6;
		assert.strictEqual(covered.min, 9);
		covered.add(10);
		assert.strictEqual(covered.min, 10);
	});

	it("should handle setting min value with no consecutive values", () => {
		const covered = new CoveredValues(5);
		covered.add(10);
		covered.add(15);
		assert.strictEqual(covered.min, 5);
		// Setting min to 8 should not auto-advance (no consecutive values)
		covered.min = 8;
		assert.strictEqual(covered.min, 8);
		// Add 9 to trigger auto-advance to 10
		covered.add(9);
		assert.strictEqual(covered.min, 10);
	});
});