import { describe, it, expect } from "vitest";
import { normalizeSeparators } from "../../extensions/compress/stages/separator.js";

const NORM = 8; // NORM_LENGTH constant from separator.ts

describe("normalizeSeparators", () => {
	it("returns unchanged text with no separators", () => {
		const text = "hello\nworld";
		expect(normalizeSeparators(text)).toBe(text);
	});

	it("shortens long ASCII dash separator", () => {
		const long = "-".repeat(60);
		expect(normalizeSeparators(long)).toBe("-".repeat(NORM));
	});

	it("shortens long equals separator", () => {
		const long = "=".repeat(40);
		expect(normalizeSeparators(long)).toBe("=".repeat(NORM));
	});

	it("shortens long Unicode box-drawing separator (─)", () => {
		const long = "─".repeat(50);
		expect(normalizeSeparators(long)).toBe("─".repeat(NORM));
	});

	it("shortens long double box separator (═)", () => {
		const long = "═".repeat(50);
		expect(normalizeSeparators(long)).toBe("═".repeat(NORM));
	});

	it("leaves separators at or below NORM_LENGTH unchanged", () => {
		const short = "-".repeat(NORM);
		expect(normalizeSeparators(short)).toBe(short);
		const shorter = "-".repeat(NORM - 1);
		expect(normalizeSeparators(shorter)).toBe(shorter);
	});

	it("normalizes separator lines within multiline text", () => {
		const input = "header\n" + "─".repeat(60) + "\ncontent";
		const expected = "header\n" + "─".repeat(NORM) + "\ncontent";
		expect(normalizeSeparators(input)).toBe(expected);
	});

	it("handles multiple separator lines", () => {
		const sep = "=".repeat(40);
		const input = sep + "\ntext\n" + sep;
		const norm = "=".repeat(NORM);
		expect(normalizeSeparators(input)).toBe(norm + "\ntext\n" + norm);
	});

	it("does not normalize mixed-character lines", () => {
		const text = "---===---";
		expect(normalizeSeparators(text)).toBe(text);
	});

	it("does not normalize regular text that starts with a separator char", () => {
		// Only pure separator lines should be normalized
		const text = "- item one";
		expect(normalizeSeparators(text)).toBe(text);
	});
});