import { describe, expect, test } from "bun:test";

import {
	buildEventError,
	eventErrorSchema,
	isEventError,
} from "./v3-error-events.js";

describe("v3 error events", () => {
	test("buildEventError creates a valid EventError message", () => {
		const msg = buildEventError({
			gen: 1,
			code: "TEST_ERROR",
		});

		expect(msg.t).toBe("getuserfeedback:event:error");
		expect(msg.code).toBe("TEST_ERROR");
		expect("recovery" in msg).toBe(false);
		expect(eventErrorSchema.safeParse(msg).success).toBe(true);
	});

	test("buildEventError includes optional details when provided", () => {
		const msg = buildEventError({
			gen: 1,
			code: "TEST_ERROR",
			details: { extra: "info" },
		});

		expect(msg.details).toEqual({ extra: "info" });
		expect(eventErrorSchema.safeParse(msg).success).toBe(true);
	});

	test("buildEventError includes optional recovery when provided", () => {
		const msg = buildEventError({
			gen: 1,
			code: "TEST_ERROR",
			recovery: {
				resetViewState: true,
				retry: {
					operation: "prefetch",
					policy: { attempts: 2, backoffMs: 250 },
					reason: "network",
				},
			},
		});

		expect(msg.recovery).toEqual({
			resetViewState: true,
			retry: {
				operation: "prefetch",
				policy: { attempts: 2, backoffMs: 250 },
				reason: "network",
			},
		});
		expect(eventErrorSchema.safeParse(msg).success).toBe(true);
	});

	test("buildEventError includes optional instanceId when provided", () => {
		const msg = buildEventError({
			gen: 1,
			code: "TEST_ERROR",
			instanceId: "inst-123",
		});

		expect(msg.instanceId).toBe("inst-123");
		expect(eventErrorSchema.safeParse(msg).success).toBe(true);
	});

	test("isEventError narrows valid error events", () => {
		const msg = buildEventError({ gen: 1, code: "TEST_ERROR" });

		expect(isEventError(msg)).toBe(true);
		if (isEventError(msg)) {
			expect(msg.code).toBe("TEST_ERROR");
		}
	});

	test("isEventError rejects non-error messages", () => {
		expect(
			isEventError({
				t: "getuserfeedback:event:ready",
				gen: 1,
			}),
		).toBe(false);
	});
});