import assert from "node:assert/strict";
import fs from "node:fs/promises";
import path from "node:path";
import { mock as nodeMock } from "node:test";

import * as lib from "@clusterio/lib";
import * as mock from "../../../test/mock.js";
import controllerEntrypoint from "../dist/node/controller.js";
import instanceEntrypoint from "../dist/node/instance.js";
import { plugin as info } from "../dist/node/index.js";
import {
	Item, PlaceEvent, RemoveRequest, GetStorageRequest, UpdateStorageEvent,
} from "../dist/node/messages.js";


describe("subspace_storage plugin", function() {
	before(function() {
		try {
			lib.registerPluginMessages([info]);
		} catch (err) {
			// Already registered by the full test suite
		}
	});

	describe("controller entrypoint", function() {
		const databaseDir = path.join("temp", "test", "subspace_storage");
		const src = lib.Address.fromShorthand({ instanceId: 7357 });
		let controller;
		let sent;
		before(async function() {
			await fs.rm(databaseDir, { recursive: true, force: true });
			controller = await mock.loadControllerPlugin(async (context) => {
				context.controller.mockConfigEntries.set("controller.database_directory", databaseDir);
				context.controller.mockConfigEntries.set("subspace_storage.division_method", "simple");
				context.controller.mockConfigEntries.set("subspace_storage.log_item_transfers", false);
				sent = [];
				context.controller.sendTo = (dst, event) => { sent.push(event); };
				await controllerEntrypoint(context);
			}, info);
		});
		after(async function() {
			await controller.hooks.shutdown.invoke();
		});

		it("should store placed items and broadcast the update", async function() {
			await mock.getHandler(controller, PlaceEvent)(
				new PlaceEvent([new Item("iron-plate", 20, "normal")]), src
			);
			const storage = await mock.getHandler(controller, GetStorageRequest)();
			assert.deepEqual(storage, [new Item("iron-plate", 20, "normal")]);
			assert(sent[0] instanceof UpdateStorageEvent);
		});
		it("should remove requested items up to the stored amount", async function() {
			const removed = await mock.getHandler(controller, RemoveRequest)(
				new RemoveRequest([new Item("iron-plate", 15, "normal"), new Item("copper-plate", 5, "normal")]), src
			);
			assert.deepEqual(removed, [new Item("iron-plate", 15, "normal")]);
		});
		it("should update the inventory gauge on metrics", async function() {
			for (const result of await controller.hooks.metrics.collect()) {
				for await (const _ of result) { /* drain */ }
			}
			const gauge = lib.defaultRegistry.collectors.find(
				collector => collector.metric?.name === "clusterio_subspace_storage_controller_inventory"
			);
			assert.equal(gauge.labels("iron-plate", "normal").get(), 5);
		});
		it("should save the item database", async function() {
			await controller.hooks.save.invoke();
			const content = JSON.parse(await fs.readFile(path.join(databaseDir, "items.json"), "utf8"));
			assert.deepEqual(content, { "iron-plate": { normal: 5 } });
		});
	});

	describe("instance entrypoint", function() {
		let instance;
		before(async function() {
			({ instance } = await mock.loadInstancePlugin(instanceEntrypoint, info));
			instance.mockConfigEntries.set("subspace_storage.log_item_transfers", false);
		});

		it("should send output items to the controller", async function() {
			instance.server.emit("ipc-subspace_storage:output", [["iron-plate", 10, "normal"]]);
			await new Promise(resolve => setImmediate(resolve));
			const message = instance.connector.sentMessages.find(m => m.data instanceof PlaceEvent);
			assert(message, "PlaceEvent was not sent");
		});
		it("should ignore orders while not running", async function() {
			instance.status = "starting";
			instance.server.emit("ipc-subspace_storage:orders", [["iron-plate", 10, "normal"]]);
			await new Promise(resolve => setImmediate(resolve));
			const message = instance.connector.sentMessages.find(m => m.data instanceof RemoveRequest);
			assert.equal(message, undefined);
		});

		it("should send the full inventory before delta updates and keep the time ticking", async function() {
			nodeMock.timers.enable({ apis: ["setInterval", "Date"], now: 1000000 });
			const { instance: startedInstance } = await mock.loadInstancePlugin(instanceEntrypoint, info);
			const items = [
				new Item("iron-plate", 100, "normal"),
				new Item("iron-plate", 5, "rare"),
				new Item("copper-plate", 50, "normal"),
			];
			startedInstance.sendTo = async (dst, request) => {
				assert.equal(dst, "controller");
				assert(request instanceof GetStorageRequest);
				return items;
			};
			function updateCommand(payload, full = false) {
				const json = lib.escapeString(JSON.stringify(payload));
				return `/sc __subspace_storage__ UpdateInvData("${json}"${full ? ", true" : ""})`;
			}
			try {
				await startedInstance.hooks.start.invoke();
				assert.deepEqual(startedInstance.server.rconCommands, [updateCommand(items, true)]);

				const changedItems = [new Item("iron-plate", 110, "normal")];
				nodeMock.timers.tick(100);
				await mock.getHandler(startedInstance, UpdateStorageEvent)(new UpdateStorageEvent(changedItems));
				nodeMock.timers.tick(900);
				nodeMock.timers.tick(1000);
				assert.deepEqual(startedInstance.server.rconCommands, [
					updateCommand(items, true),
					updateCommand([...changedItems, new Item("signal-unixtime", 1001)]),
					updateCommand([...changedItems, new Item("signal-unixtime", 1002)]),
				]);
			} finally {
				await startedInstance.hooks.stop.invoke();
				nodeMock.timers.reset();
			}
		});
		it("should not send commands while auto paused and catch up on unpause", async function() {
			nodeMock.timers.enable({ apis: ["setInterval", "Date"], now: 1000000 });
			const { instance: startedInstance, host } = await mock.loadInstancePlugin(instanceEntrypoint, info);
			host.connected = true;
			startedInstance.sendTo = async () => [];
			try {
				await startedInstance.hooks.start.invoke();
				startedInstance.server.rconCommands.length = 0;
				startedInstance.autoPaused = true;
				nodeMock.timers.tick(10000);
				assert.deepEqual(startedInstance.server.rconCommands, []);

				startedInstance.autoPaused = false;
				await startedInstance.hooks.autoPauseChanged.invoke(false);
				assert.deepEqual(startedInstance.server.rconCommands, [
					"/sc __subspace_storage__ global.ticksSinceMasterPinged = 0",
					`/sc __subspace_storage__ UpdateInvData("${lib.escapeString(JSON.stringify(
						[new Item("signal-unixtime", 1010)]
					))}")`,
				]);
			} finally {
				await startedInstance.hooks.stop.invoke();
				nodeMock.timers.reset();
			}
		});
		describe("timers and unpause", function() {
			const ping = "/sc __subspace_storage__ global.ticksSinceMasterPinged = 0";
			const isInventory = command => command.includes("UpdateInvData");
			let startedInstance;
			let host;
			beforeEach(async function() {
				nodeMock.timers.enable({ apis: ["setInterval", "Date"], now: 1000000 });
				({ instance: startedInstance, host } = await mock.loadInstancePlugin(instanceEntrypoint, info));
				host.connected = true;
				startedInstance.sendTo = async () => [];
				await startedInstance.hooks.start.invoke();
				startedInstance.server.rconCommands.length = 0;
			});
			afterEach(async function() {
				await startedInstance.hooks.stop.invoke();
				nodeMock.timers.reset();
			});

			it("should not ping while the host is disconnected", async function() {
				host.connected = false;
				nodeMock.timers.tick(5000);
				await startedInstance.hooks.autoPauseChanged.invoke(false);
				const commands = startedInstance.server.rconCommands;
				assert(!commands.includes(ping), "ping was sent");
				assert.equal(commands.filter(isInventory).length, 6);
			});
			it("should not send inventory while not running", async function() {
				startedInstance.status = "stopping";
				nodeMock.timers.tick(5000);
				await startedInstance.hooks.autoPauseChanged.invoke(false);
				assert.deepEqual(startedInstance.server.rconCommands, [ping]);
			});
		});
	});
});