"use strict";
const assert = require("assert").strict;
const path = require("path");
const fs = require("fs-extra");

const libLink = require("@clusterio/lib/link");
const libConfig = require("@clusterio/lib/config");
const Instance = require("@clusterio/slave/src/Instance");
const Slave = require("@clusterio/slave/src/Slave");

describe("Slave testing", function() {
	before(function() {
		libConfig.InstanceConfig.finalize();
	});

	describe("symlinkMods()", function() {
		let testDir = path.join("temp", "test", "symlink");

		let instance;
		before(async function() {
			// Remove previous test output
			await fs.remove(testDir);

			// Add some test mods
			await fs.outputFile(path.join(testDir, "shared", "mod_a.zip"), "a");
			await fs.outputFile(path.join(testDir, "shared", "mod_b.zip"), "b");
			await fs.outputFile(path.join(testDir, "shared", "mod.dat"), "c");
			await fs.outputFile(path.join(testDir, "shared", "mod-list.json"), "d");

			let instanceConfig = new libConfig.InstanceConfig("slave");
			await instanceConfig.init();
			instanceConfig.set("instance.name", "test");
			instance = new Instance(
				{}, new libLink.VirtualConnector(), path.join(testDir, "instance"), "factorioDir", instanceConfig
			);
			await fs.outputFile(instance.path("mods", "mod_i.zip"), "i");
		});

		it("should link mods and data files", async function() {
			await Instance._symlinkMods(instance, path.join(testDir, "shared"));

			assert.equal(await fs.readFile(instance.path("mods", "mod_a.zip"), "utf-8"), "a");
			assert.equal(await fs.readFile(instance.path("mods", "mod_b.zip"), "utf-8"), "b");
			assert.equal(await fs.readFile(instance.path("mods", "mod.dat"), "utf-8"), "c");
			assert.equal(await fs.readFile(instance.path("mods", "mod-list.json"), "utf-8"), "d");
			assert.equal(await fs.readFile(instance.path("mods", "mod_i.zip"), "utf-8"), "i");
		});

		it("should ignore directories", async function() {
			await fs.ensureDir(path.join(testDir, "shared", "dir"));
			await Instance._symlinkMods(instance, path.join(testDir, "shared"));

			assert(!await fs.exists(instance.path("mods", "dir"), "utf-8"), "dir was unxpectedly linked");
		});

		it("should ignore files", async function() {
			await fs.outputFile(path.join(testDir, "shared", "file"), "f");
			await Instance._symlinkMods(instance, path.join(testDir, "shared"));

			assert(!await fs.exists(instance.path("mods", "file"), "utf-8"), "dir was unxpectedly linked");
		});

		it("should unlink removed mods", async function() {
			// This does not work on Windows
			if (process.platform === "win32") {
				this.skip();
			}

			await fs.unlink(path.join(testDir, "shared", "mod_a.zip"));
			await Instance._symlinkMods(instance, path.join(testDir, "shared"));

			await assert.rejects(fs.lstat(instance.path("mods", "mod_a.zip")), { code: "ENOENT" });
			assert.equal(await fs.readFile(instance.path("mods", "mod_b.zip"), "utf-8"), "b");
			assert.equal(await fs.readFile(instance.path("mods", "mod.dat"), "utf-8"), "c");
			assert.equal(await fs.readFile(instance.path("mods", "mod-list.json"), "utf-8"), "d");
			assert.equal(await fs.readFile(instance.path("mods", "mod_i.zip"), "utf-8"), "i");
		});
	});

	describe("discoverInstances()", function() {
		it("should discover test instance", async function() {
			let instancePath = path.join("test", "file", "instances");
			let instanceInfos = await Slave._discoverInstances(instancePath);

			let referenceConfig = new libConfig.InstanceConfig("slave");
			await referenceConfig.init();
			referenceConfig.set("instance.id", 1);
			referenceConfig.set("instance.name", "test");

			assert.deepEqual(instanceInfos, new Map([
				[1, {
					config: referenceConfig,
					path: path.join(instancePath, "test"),
				}],
			]));
		});
	});

	describe("class Slave", function() {
		describe(".syncUserListsEventHandler()", function() {
			let mockSlave;
			beforeEach(function() {
				mockSlave = {
					adminlist: new Set(),
					whitelist: new Set(),
					banlist: new Map(),
					broadcasts: [],
					broadcastEventToInstance(message, event) {
						this.broadcasts.push(message["data"]);
					},
					syncUserListsEventHandler: Slave.prototype.syncUserListsEventHandler,
					syncLists(adminlist, banlist, whitelist) {
						return this.syncUserListsEventHandler({ "data": {
							"adminlist": adminlist,
							"banlist": banlist,
							"whitelist": whitelist,
						}});
					},
				};
			});

			it("should broadcast new entries to adminlist", async function() {
				await mockSlave.syncLists(["admin1"], [], []);
				await mockSlave.syncLists(["admin1", "admin2"], [], []);

				assert.deepEqual(mockSlave.broadcasts, [
					{ "name": "admin1", "admin": true },
					{ "name": "admin2", "admin": true },
				]);
			});

			it("should broadcast removals from adminlist", async function() {
				mockSlave.adminlist.add("admin1").add("admin2");
				await mockSlave.syncLists(["admin1"], [], []);
				assert.deepEqual(mockSlave.broadcasts, [
					{ "name": "admin2", "admin": false },
				]);
			});

			it("should broadcast new entries to whitelist", async function() {
				await mockSlave.syncLists([], [], ["player1"]);
				await mockSlave.syncLists([], [], ["player1", "player2"]);

				assert.deepEqual(mockSlave.broadcasts, [
					{ "name": "player1", "whitelisted": true },
					{ "name": "player2", "whitelisted": true },
				]);
			});

			it("should broadcast removals from whitelist", async function() {
				mockSlave.whitelist.add("player1").add("player2");
				await mockSlave.syncLists([], [], ["player1"]);

				assert.deepEqual(mockSlave.broadcasts, [
					{ "name": "player2", "whitelisted": false },
				]);
			});

			it("should broadcast new entries to banlist", async function() {
				await mockSlave.syncLists([], [["badie1", "greifing"]], []);
				await mockSlave.syncLists([], [["badie1", "greifing"], ["badie2", "annoying"]], []);

				assert.deepEqual(mockSlave.broadcasts, [
					{ "name": "badie1", "banned": true, "reason": "greifing" },
					{ "name": "badie2", "banned": true, "reason": "annoying" },
				]);
			});

			it("should broadcast removals to banlist", async function() {
				mockSlave.banlist.set("badie1", "greifing").set("badie2", "annoying");
				await mockSlave.syncLists([], [["badie1", "greifing"]], []);

				assert.deepEqual(mockSlave.broadcasts, [
					{ "name": "badie2", "banned": false, "reason": "" },
				]);
			});
		});
	});
});