import { describe, expect, it } from "vitest";
import { resolveCreatureName } from "../auto-number.js";

describe("resolveCreatureName", () => {
	it("returns name as-is when no conflict exists", () => {
		const result = resolveCreatureName("Goblin", ["Orc", "Dragon"]);
		expect(result).toEqual({ newName: "Goblin", renames: [] });
	});

	it("returns name as-is when existing list is empty", () => {
		const result = resolveCreatureName("Goblin", []);
		expect(result).toEqual({ newName: "Goblin", renames: [] });
	});

	it("renames existing to 'Name 1' and new to 'Name 2' on first conflict", () => {
		const result = resolveCreatureName("Goblin", ["Orc", "Goblin", "Dragon"]);
		expect(result).toEqual({
			newName: "Goblin 2",
			renames: [{ from: "Goblin", to: "Goblin 1" }],
		});
	});

	it("appends next number when numbered variants already exist", () => {
		const result = resolveCreatureName("Goblin", ["Goblin 1", "Goblin 2"]);
		expect(result).toEqual({ newName: "Goblin 3", renames: [] });
	});

	it("handles mixed exact and numbered matches", () => {
		const result = resolveCreatureName("Goblin", [
			"Goblin",
			"Goblin 1",
			"Goblin 2",
		]);
		expect(result).toEqual({ newName: "Goblin 3", renames: [] });
	});

	it("handles names with special regex characters", () => {
		const result = resolveCreatureName("Goblin (Boss)", ["Goblin (Boss)"]);
		expect(result).toEqual({
			newName: "Goblin (Boss) 2",
			renames: [{ from: "Goblin (Boss)", to: "Goblin (Boss) 1" }],
		});
	});

	it("does not match partial name overlaps", () => {
		const result = resolveCreatureName("Goblin", ["Goblin Boss"]);
		expect(result).toEqual({ newName: "Goblin", renames: [] });
	});
});