"use strict";
const assert = require("assert").strict;
const { Controller } = require("@clusterio/controller");
const { ControllerConfig, Address, RequestError } = require("@clusterio/lib");
const { EventEmitter } = require("stream");

class MockEvent {}

class MockInstanceConfig extends EventEmitter {
	constructor(data = new Map()) {
		super();
		this._data = data;
	}

	get(field) {
		return this._data.get(field);
	}

	set(field, value) {
		return this._data.set(field, value);
	}
}

describe("controller/src/Controller", function() {
	describe("class Controller", function() {
		/** @type {Controller} */
		let controller, mockInstanceConfig;
		before(async function() {
			controller = new Controller({}, [], "", new ControllerConfig("controller"));
			mockInstanceConfig = new MockInstanceConfig(new Map([
				["instance.id", 100], ["instance.name", "test"], ["factorio.settings", []],
			]));
			await controller.instanceCreate(mockInstanceConfig);
		});
		function check(list, ip, present = true) {
			if (present === false) {
				assert(!list.check(ip), `${ip} unexpectedly in list`);
			} else {
				assert(list.check(ip), `${ip} missing from list`);
			}
		}
		describe(".parseTrustedProxies()", function() {
			it("should parse addresses", function() {
				controller.config.set("controller.trusted_proxies", "10.0.0.1");
				let list = controller.parseTrustedProxies();
				check(list, "10.0.0.1");
				check(list, "10.0.0.2", false);
				controller.config.set("controller.trusted_proxies", "10.0.0.1, 10.0.0.2, 10.1.2.3");
				list = controller.parseTrustedProxies();
				check(list, "10.0.0.1");
				check(list, "10.0.0.2");
				check(list, "10.0.0.3", false);
			});
			it("should ignore invalid entries", function() {
				controller.config.set("controller.trusted_proxies", "10.0.0.1, invalid, 0.0.0.0/200, 10.0.0.2");
				const list = controller.parseTrustedProxies();
				check(list, "10.0.0.1");
				check(list, "10.0.0.2");
				check(list, "10.0.0.3", false);
			});
			it("should parse CIDR blocks", function() {
				controller.config.set("controller.trusted_proxies", "10.0.0.1/24, 192.168.0.16/31");
				const list = controller.parseTrustedProxies();
				check(list, "10.0.0.0");
				check(list, "10.0.0.1");
				check(list, "10.0.0.10");
				check(list, "10.0.0.255");
				check(list, "10.0.1.0", false);
				check(list, "192.168.0.15", false);
				check(list, "192.168.0.16");
				check(list, "192.168.0.17");
				check(list, "192.168.0.18", false);
			});
		});

		describe(".sendRequest()", function() {
			it("should error on loopback", function() {
				assert.throws(
					() => controller.sendRequest(new MockEvent(), Address.fromShorthand("controller")),
					new Error(`Message would return back to sender ${Address.fromShorthand("controller")}.`)
				);
			});
			it("should error on invalid controller", function() {
				assert.throws(
					() => controller.sendRequest(new MockEvent(), Address.fromShorthand({ controlId: 99 })),
					new RequestError("Target control connection does not exist.")
				);
			});
			it("should error on invalid instance", function() {
				assert.throws(
					() => controller.sendRequest(new MockEvent(), Address.fromShorthand({ instanceId: 99 })),
					new RequestError("Instance with ID 99 does not exist")
				);
			});
			it("should error on unassigned instance", function() {
				mockInstanceConfig.set("instance.assigned_host", null);
				assert.throws(
					() => controller.sendRequest(new MockEvent(), Address.fromShorthand({ instanceId: 100 })),
					new RequestError("Instance is not assigned to a host")
				);
			});
			it("should error on instance with disconnected host", function() {
				mockInstanceConfig.set("instance.assigned_host", 99);
				assert.throws(
					() => controller.sendRequest(new MockEvent(), Address.fromShorthand({ instanceId: 100 })),
					new RequestError("Host containing instance is not connected")
				);
			});
			it("should error on invalid host", function() {
				assert.throws(
					() => controller.sendRequest(new MockEvent(), Address.fromShorthand({ hostId: 99 })),
					new RequestError("Host is not connected")
				);
			});
			it("should error on invalid broadcast", function() {
				// This is different to sendEvent because requests do not support broadcasting
				assert.throws(
					() => controller.sendRequest(new MockEvent(), new Address(Address.broadcast, 99)),
					new Error(`Unknown address type ${Address.broadcast}`)
				);
			});
			it("should error on invalid address", function() {
				assert.throws(
					() => controller.sendRequest(new MockEvent(), new Address(99, 99)),
					new Error("Unknown address type 99")
				);
			});
		});

		describe(".sendEvent()", function() {
			it("should error on loopback", function() {
				assert.throws(
					() => controller.sendEvent(new MockEvent(), Address.fromShorthand("controller")),
					new Error(`Message would return back to sender ${Address.fromShorthand("controller")}.`)
				);
			});
			it("should error on invalid controller", function() {
				assert.throws(
					() => controller.sendEvent(new MockEvent(), Address.fromShorthand({ controlId: 99 })),
					new Error("Target control connection does not exist.")
				);
			});
			it("should error on invalid instance", function() {
				assert.throws(
					() => controller.sendEvent(new MockEvent(), Address.fromShorthand({ instanceId: 99 })),
					new Error("Instance with ID 99 does not exist")
				);
			});
			it("should error on unassigned instance", function() {
				mockInstanceConfig.set("instance.assigned_host", null);
				assert.throws(
					() => controller.sendEvent(new MockEvent(), Address.fromShorthand({ instanceId: 100 })),
					new Error("Instance is not assigned to a host")
				);
			});
			it("should error on instance with disconnected host", function() {
				mockInstanceConfig.set("instance.assigned_host", 99);
				assert.throws(
					() => controller.sendEvent(new MockEvent(), Address.fromShorthand({ instanceId: 100 })),
					new Error("Host containing instance is not connected")
				);
			});
			it("should error on invalid host", function() {
				assert.throws(
					() => controller.sendEvent(new MockEvent(), Address.fromShorthand({ hostId: 99 })),
					new Error("Host is not connected")
				);
			});
			it("should error on invalid broadcast", function() {
				assert.throws(
					() => controller.sendEvent(new MockEvent(), new Address(Address.broadcast, 99)),
					new Error("Unexpected broadcast target 99")
				);
			});
			it("should error on invalid address", function() {
				assert.throws(
					() => controller.sendEvent(new MockEvent(), new Address(99, 99)),
					new Error("Unknown address type 99")
				);
			});
		});
	});
});