import { describe, expect, it } from "vitest";
import { deletePlayerCharacter } from "../delete-player-character.js";
import type { PlayerCharacter } from "../player-character-types.js";
import { playerCharacterId } from "../player-character-types.js";
import { isDomainError } from "../types.js";
import { expectDomainError } from "./test-helpers.js";

const id1 = playerCharacterId("pc-1");
const id2 = playerCharacterId("pc-2");

function makePC(overrides?: Partial<PlayerCharacter>): PlayerCharacter {
	return {
		id: id1,
		name: "Aragorn",
		ac: 16,
		maxHp: 120,
		color: "green",
		icon: "sword",
		...overrides,
	};
}

describe("deletePlayerCharacter", () => {
	it("deletes an existing character", () => {
		const result = deletePlayerCharacter([makePC()], id1);
		if (isDomainError(result)) throw new Error(result.message);
		expect(result.characters).toHaveLength(0);
	});

	it("returns error for not-found id", () => {
		const result = deletePlayerCharacter([makePC()], id2);
		expectDomainError(result, "player-character-not-found");
	});

	it("emits PlayerCharacterDeleted event", () => {
		const result = deletePlayerCharacter([makePC()], id1);
		if (isDomainError(result)) throw new Error(result.message);
		expect(result.events).toHaveLength(1);
		expect(result.events[0].type).toBe("PlayerCharacterDeleted");
	});

	it("preserves other characters when deleting one", () => {
		const pc1 = makePC({ id: id1, name: "Aragorn" });
		const pc2 = makePC({ id: id2, name: "Legolas" });
		const result = deletePlayerCharacter([pc1, pc2], id1);
		if (isDomainError(result)) throw new Error(result.message);
		expect(result.characters).toHaveLength(1);
		expect(result.characters[0].name).toBe("Legolas");
	});

	it("event includes deleted character name", () => {
		const result = deletePlayerCharacter([makePC()], id1);
		if (isDomainError(result)) throw new Error(result.message);
		const event = result.events[0];
		if (event.type !== "PlayerCharacterDeleted") throw new Error("wrong event");
		expect(event.name).toBe("Aragorn");
	});
});