import assert from "node:assert/strict";
import test from "node:test";
import {
	MAX_FRAME_BYTES,
	ProtocolError,
	parseRequestFrame,
	validateEvent,
} from "../src/protocol/index.js";

const request = (value) =>
	JSON.stringify({ version: "v1", id: "request-1", ...value });

test("accepts a command scoped to its selected agent", () => {
	assert.deepEqual(
		parseRequestFrame(
			request({
				op: "prompt",
				agentId: "agent-main",
				payload: { message: "implement the protocol" },
			}),
		),
		{
			version: "v1",
			id: "request-1",
			op: "prompt",
			agentId: "agent-main",
			payload: { message: "implement the protocol" },
		},
	);
});

test("accepts an agent transcript request without a synthetic cursor", () => {
	assert.deepEqual(
		parseRequestFrame(request({ op: "get_transcript", agentId: "agent-main" })),
		{
			version: "v1",
			id: "request-1",
			op: "get_transcript",
			agentId: "agent-main",
		},
	);
});

test("accepts bridge-managed directory and session operations", () => {
	assert.deepEqual(parseRequestFrame(request({ op: "list_directories" })), {
		version: "v1",
		id: "request-1",
		op: "list_directories",
	});
	assert.deepEqual(
		parseRequestFrame(request({ op: "list_sessions", agentId: "agent-main" })),
		{
			version: "v1",
			id: "request-1",
			op: "list_sessions",
			agentId: "agent-main",
		},
	);
	assert.deepEqual(
		parseRequestFrame(request({ op: "new_session", agentId: "agent-main" })),
		{
			version: "v1",
			id: "request-1",
			op: "new_session",
			agentId: "agent-main",
		},
	);
	assert.deepEqual(
		parseRequestFrame(
			request({
				op: "switch_session",
				agentId: "agent-main",
				payload: { sessionPath: "/sessions/session.jsonl" },
			}),
		),
		{
			version: "v1",
			id: "request-1",
			op: "switch_session",
			agentId: "agent-main",
			payload: { sessionPath: "/sessions/session.jsonl" },
		},
	);
	assert.throws(
		() =>
			parseRequestFrame(
				request({
					op: "switch_session",
					agentId: "agent-main",
					payload: { sessionPath: "relative.jsonl" },
				}),
			),
		/must be absolute/,
	);
});

test("accepts an agent session-statistics request", () => {
	assert.deepEqual(
		parseRequestFrame(
			request({ op: "get_session_stats", agentId: "agent-main" }),
		),
		{
			version: "v1",
			id: "request-1",
			op: "get_session_stats",
			agentId: "agent-main",
		},
	);
});

test("accepts a default composer submit request", () => {
	assert.deepEqual(
		parseRequestFrame(
			request({
				op: "submit_prompt",
				agentId: "agent-main",
				payload: { message: "Continue" },
			}),
		),
		{
			version: "v1",
			id: "request-1",
			op: "submit_prompt",
			agentId: "agent-main",
			payload: { message: "Continue" },
		},
	);
});

test("accepts a selected agent get_commands request", () => {
	assert.deepEqual(
		parseRequestFrame(request({ op: "get_commands", agentId: "agent-main" })),
		{
			version: "v1",
			id: "request-1",
			op: "get_commands",
			agentId: "agent-main",
		},
	);
});

test("rejects malformed, unknown, and oversized frames", () => {
	assert.throws(() => parseRequestFrame("not json"), ProtocolError);
	assert.throws(
		() => parseRequestFrame(request({ op: "teleport" })),
		/not supported/,
	);
	assert.throws(
		() => parseRequestFrame("x".repeat(MAX_FRAME_BYTES + 1)),
		/frame exceeds/,
	);
});

test("rejects cross-worktree routing fields on agent commands", () => {
	assert.throws(
		() =>
			parseRequestFrame(
				request({
					op: "prompt",
					agentId: "agent-main",
					payload: { message: "wrong worktree", worktreePath: "/other" },
				}),
			),
		/not supported/,
	);
});

test("requires explicit absolute worktree selection", () => {
	assert.throws(
		() =>
			parseRequestFrame(
				request({
					op: "select_agent",
					payload: { worktreePath: "relative/project" },
				}),
			),
		/must be absolute/,
	);
});

test("normalizes sequenced bridge events", () => {
	assert.deepEqual(
		validateEvent({
			version: "v1",
			seq: 2,
			type: "extension_ui_request",
			agentId: "agent-main",
			data: { id: "extension-1", method: "confirm" },
		}),
		{
			version: "v1",
			seq: 2,
			type: "extension_ui_request",
			agentId: "agent-main",
			data: { id: "extension-1", method: "confirm" },
		},
	);
});