import assert from "node:assert/strict";
import http   from "node:http";

import { runTests } from "../runner.mjs";
import { assocIn } from "../../src/utils.mjs";
import {
	normalizeSegments,
	pathToSegments,
	hasPathParams,
	addRoute,
	findStaticHandler,
	firstParamMatch,
	findDynamicHandler,
	findHandler,
	extractQueryParams,
	handleRequest,
	makeRequestListener,
	interceptorsFn,
	interceptors,
	chainInterceptors,
	wrapHandler,
	buildRoutes,
	promisifyServer,
	buildServer,
} from "../../src/hero.mjs";


const test_normalizeSegments = t => {
	t.start("normalizeSegments()");

	t.test("unchanged when already normalized", () => {
		assert.deepEqual(normalizeSegments([""]), [""]);
	});

	t.test("empty terminator added when missing", () => {
		assert.deepEqual(normalizeSegments([]), [""]);
		assert.deepEqual(normalizeSegments([" "]), [" ", ""]);
		assert.deepEqual(normalizeSegments(["_"]), ["_", ""]);
		assert.deepEqual(normalizeSegments(["a"]), ["a", ""]);
		assert.deepEqual(normalizeSegments([":a"]), [":a", ""]);
		assert.deepEqual(normalizeSegments(["path"]), ["path", ""]);
	});
};

const test_pathToSegments = t => {
	t.start("pathToSegments()");

	t.test("simple paths", () => {
		assert.deepEqual(pathToSegments("/"), [ "" ]);
		assert.deepEqual(pathToSegments("/simple"), ["simple", ""]);
		assert.deepEqual(pathToSegments("/simple/route"), ["simple", "route", ""]);

		assert.deepEqual(pathToSegments("/api/user/:id"),      ["api", "user", ":id", ""]);
		assert.deepEqual(pathToSegments("/api/user/:id/info"), ["api", "user", ":id", "info", ""]);
	});

	t.test("extra separators", () => {
		assert.deepEqual(pathToSegments("/api/health/"),     ["api", "health", ""]);
		assert.deepEqual(pathToSegments("/api///health"),    ["api", "health", ""]);
		assert.deepEqual(pathToSegments("//api///health//"), ["api", "health", ""]);
	});
};

const test_hasPathParams = t => {
	t.start("hasPathParam()");

	t.test("has it", () => {
		assert(hasPathParams(["some", ":path", ""]));
		assert(hasPathParams(["path", ":params", ""]));
		assert(hasPathParams(["api", "user", ":id", "info", ""]));
	});

	t.test("doesn't have it", () => {
		assert(!hasPathParams([]));
		assert(!hasPathParams([ "" ]));
		assert(!hasPathParams(["some", "path", ""]));
		assert(!hasPathParams(["s:o:m:e:", "p::ath:::"]));
		assert(!hasPathParams([" :"]));
	});
};

const test_addRoute = t => {
	t.start("addRoute()");

	const fn1 = () => {};

	t.test("daily usage examples", () => {
		assert.deepEqual(
			addRoute({}, "GET", "/home", fn1),
			{ static: { GET: { home: { "": fn1 }}}},
		);

		assert.deepEqual(
			addRoute({}, ["PUT", "POST", "PATCH"], "/api/user", fn1),
			{
				static: {
					PUT:   { api: { user: { "": fn1 }}},
					POST:  { api: { user: { "": fn1 }}},
					PATCH: { api: { user: { "": fn1 }}},
				},
			},
		);

		assert.deepEqual(
			addRoute({}, "*", "/settings", fn1),
			{
				static: {
					GET:     { settings: { "": fn1 }},
					HEAD:    { settings: { "": fn1 }},
					POST:    { settings: { "": fn1 }},
					PUT:     { settings: { "": fn1 }},
					PATCH:   { settings: { "": fn1 }},
					DELETE:  { settings: { "": fn1 }},
					OPTIONS: { settings: { "": fn1 }},
				},
			},
		);

		assert.deepEqual(
			addRoute({}, "GET", "/", fn1),
			{ static: { GET: { "": fn1 }}},
		);

		assert.deepEqual(
			addRoute({}, "GET", "/api/user/:id", fn1),
			{ dynamic: { GET: { api: { user: { ":id": { "": fn1 }}}}}},
		);

		assert.deepEqual(
			addRoute({}, ["PUT", "PATCH"], "/api/org/:orgid/member/:memberid", fn1),
			{
				dynamic: {
					PUT:   { api: { org: { ":orgid": { member: { ":memberid": { "": fn1 }}}}}},
					PATCH: { api: { org: { ":orgid": { member: { ":memberid": { "": fn1 }}}}}},
				},
			},
		);
	});

	t.test("bad method", () => {
		assert.throws(
			() => addRoute({}, "VERB", "/path", fn1),
			assert.AssertionError,
		);
	});

	t.test("empty methods array", () => {
		assert.deepEqual(addRoute({}, [], "", fn1), {});
	});

	t.test("subpaths", () => {
		const fn1 = () => {};
		const fn2 = () => {};

		const t1 = addRoute({}, "GET", "/home",         fn1);
		const t2 = addRoute(t1, "GET", "/home/details", fn2);
		assert.deepEqual(
			t2,
			{
				static: {
					GET: {
						home: {
							"": fn1,
							details: {
								"": fn2,
							},
						},
					},
				},
			},
		);
	});
};

const test_findStaticHandler = t => {
	t.start("findStaticHandler()");

	t.test("multiple accesses to the same table", () => {
		const fn1 = () => {};
		const fn2 = () => {};
		const fn3 = () => {};

		const table = {
			static: {
				GET: {
					api: {
						home: { "": fn1 },
						settings: { "": fn2 },
					},
				},
				POST: {
					api: {
						settings: { "": fn3 },
					},
				},
			},
		};

		assert.deepEqual(
			findStaticHandler(table, "GET", [ "api", "home", "" ]),
			{ handlerFn: fn1, params: {} },
		);
		assert.deepEqual(
			findStaticHandler(table, "PUT", [ "api", "home", "" ]),
			null,
		);

		assert.deepEqual(
			findStaticHandler(table, "GET", [ "api", "settings", "" ]),
			{ handlerFn: fn2, params: {} },
		);
		assert.deepEqual(
			findStaticHandler(table, "POST", [ "api", "settings", "" ]),
			{ handlerFn: fn3, params: {} },
		);
		assert.deepEqual(
			findStaticHandler(table, "PUT", [ "api", "settings", "" ]),
			null,
		);

		assert.deepEqual(
			findStaticHandler(table, "GET", [ "api", "profile", "" ]),
			null,
		);

		assert.deepEqual(
			findStaticHandler({}, "GET", [ "api", "profile", "" ]),
			null,
		);
	});
};

const test_firstParamMatch = t => {
	t.start("firstParamMatch()");

	const params = {};
	const fn1 = () => {};
	const fn2 = () => {};

	t.test("we BACKTRACK when searching down routes", () => {
		const segments = [ "path", "split", "match", "" ];

		const tree = {
			path: {
				split: {
					MISMATCH: {
						"": fn1,
					},
				},
				":param": {
					match: {
						"": fn2,
					},
				},
			},
		};

		assert.deepEqual(
			firstParamMatch(tree, segments, params),
			{ handlerFn: fn2, params: { param: "split" }},
		);
	});

	t.test("ambiguous route prefers params at the end", () => {
		const segments = [ "path", "param1", "param2", "" ];

		const tree1 = {
			path: {
				":shallower": {
					param2: {
						"": fn2,
					},
				},
			},
		};

		const tree2 = assocIn(tree1, [ "path", "param1", ":deeper", "" ], fn1);

		assert.deepEqual(
			firstParamMatch(tree1, segments, params),
			{ handlerFn: fn2, params: { shallower: "param1" }},
		);

		assert.deepEqual(
			firstParamMatch(tree2, segments, params),
			{ handlerFn: fn1, params: { deeper: "param2" }},
		);
	});

	t.test("when 2 params are possible, we pick the first alphabetically", () => {
		const segments = [ "user", "someId", "" ];

		const tree1 = {
			user: {
				":bbb": {
					"": fn2,
				},
			},
		};

		const tree2 = assocIn(tree1, ["user", ":aaa", ""], fn1);

		assert.deepEqual(
			firstParamMatch(tree1, segments, params),
			{ handlerFn: fn2, params: { bbb: "someId" }},
		);

		assert.deepEqual(
			firstParamMatch(tree2, segments, params),
			{ handlerFn: fn1, params: { aaa: "someId" }},
		);
	});

	t.test(`we deal with segments that start with ":"`, () => {
		const segments = [ "path", ":param", "" ];
		const tree = {
			path: {
				":arg": {
					"": fn1,
				},
			},
		};

		assert.deepEqual(
			firstParamMatch(tree, segments, params),
			{ handlerFn: fn1, params: { arg: ":param" }},
		);
	});
};

const test_findDynamicHandler = t => {
	t.start("findDynamicHandler()");

	t.test("daily usage cases", () => {
		const fn1 = () => {};
		const fn2 = () => {};

		const table = {
			dynamic: {
				GET: {
					users: {
						"by-id": {
							":id": { "": fn1 },
						},
					},
				},
				PUT: {
					user: {
						":user-id": {
							info: { "": fn2 },
						},
					},
				},
			},
		};

		assert.deepEqual(
			findDynamicHandler(table, "GET", [ "users", "by-id", "123", "" ]),
			{ handlerFn: fn1, params: { "id": "123" }},
		);

		assert.deepEqual(
			findDynamicHandler({}, "GET", [ "users", "by-id", "123", "" ]),
			null,
		);

		assert.deepEqual(
			findDynamicHandler({ dynamic: { GET: { "": fn1 }}}, "GET", [ "users", "by-id", "123", "" ]),
			null,
		);

		assert.deepEqual(
			findDynamicHandler(table, "PUT", [ "user", "deadbeef", "info", "" ]),
			{ handlerFn: fn2, params: { "user-id": "deadbeef" }},
		);
	});
};

const test_findHandler = t => {
	t.start("findHandler()");

	t.test("mix of static and dynamic routes", () => {
		const static1  = () => {};
		const static2  = () => {};
		const static3  = () => {};
		const dynamic1 = () => {};
		const dynamic2 = () => {};
		const dynamic3 = () => {};
		const dynamic4 = () => {};

		const table = {
			static: {
				GET: {
					user: {
						"": static1,
					},
					pages: {
						"": static2,
						home: {
							"": static3,
						},
					},
				},
			},
			dynamic: {
				GET: {
					user: {
						":id": {
							"": dynamic1,
						},
					},
				},
				PUT: {
					user: {
						":id": {
							"": dynamic2,
							"info": {
								"": dynamic3,
							},
							"preferences": {
								"": dynamic4,
							},
						},
					},
				},
			},
		};

		assert.deepEqual(
			findHandler(table, "GET", "/"),
			null,
		);

		assert.deepEqual(
			findHandler(table, "GET", "/user/"),
			{ handlerFn: static1, params: {} },
		);

		assert.deepEqual(
			findHandler(table, "GET", "/pages"),
			{ handlerFn: static2, params: {} },
		);
		assert.deepEqual(
			findHandler(table, "GET", "/pages/home/"),
			{ handlerFn: static3, params: {} },
		);

		assert.deepEqual(
			findHandler(table, "GET", "/user/some-id"),
			{ handlerFn: dynamic1, params: { id: "some-id" }},
		);
		assert.deepEqual(
			findHandler(table, "GET", "/user/other-id/info"),
			null,
		);

		assert.deepEqual(
			findHandler(table, "PUT", "/user/other-id/info"),
			{ handlerFn: dynamic3, params: { id: "other-id" }},
		);
		assert.deepEqual(
			findHandler(table, "PUT", "/user/another-id/preferences"),
			{ handlerFn: dynamic4, params: { id: "another-id" }},
		);
		assert.deepEqual(
			findHandler(table, "POST", "/user/another-id/preferences"),
			null,
		);
	});
};

const test_extractQueryParams = t => {
	t.start("extractQueryParams()");

	t.test("empty values", () => {
		assert.deepEqual(extractQueryParams(),          {});
		assert.deepEqual(extractQueryParams(null),      {});
		assert.deepEqual(extractQueryParams(undefined), {});
	});

	t.test("we get a flat key-value strings", () => {
		assert.deepEqual(
			extractQueryParams("a[]=1&b=text&c=___"),
			{
				"a[]": "1",
				b: "text",
				c: "___",
			},
		);
	});

	t.test("duplicate values are suppressed, deterministically", () => {
		assert.deepEqual(extractQueryParams("a=1&a=2&a=3"), { a: "3" });
		assert.deepEqual(extractQueryParams("a=1&b=2&a=3"), { a: "3", b: "2" });
	});
};

const test_handleRequest = t => {
	t.start("handleRequest()");

	const fn = req => req;

	t.test("request without params", async () => {
		const table = {
			static: {
				GET: {
					"": fn,
				},
			},
		};

		assert.deepEqual(
			await handleRequest(table, "GET", "/?q=1"),
			{
				params: {
					path: {},
					query: {
						q: "1",
					},
				},
				method: "GET",
				path: "/",
				handler: fn,
			},
		);
	});

	t.test("request with params", async () => {
		const table = {
			dynamic: {
				PUT: {
					api: {
						user: {
							":userId": {
								"": fn,
							},
						},
					},
				},
			},
		};

		assert.deepEqual(
			await handleRequest(table, "PUT", "/api/user/2222"),
			{
				params: {
					path: {
						userId: "2222",
					},
					query: {},
				},
				method: "PUT",
				path: "/api/user/2222",
				handler: fn,
			},
		);
	});

	t.test("missing route", async () => {
		assert.deepEqual(
			await handleRequest({}, "GET", "/"),
			{
				status: 404,
				body: "Not Found",
			},
		);
	});
};

const test_makeRequestListener = t => {
	t.start("makeRequestListener()");

	t.test("straightforward body execution", async () => {
		const fn = _ => ({
			status:  "test status",
			body:    "test body",
			headers: "test headers",
		});
		const routes = [[ "GET", "/route1", fn ]];
		const requestListener = makeRequestListener(buildRoutes(routes));
		const req = {
			method: "GET",
			url:    "/route1",
		};

		const heads  = [];
		const bodies = [];
		const res = {
			writeHead: (status, headers) => heads.push({ status, headers }),
			end: body => bodies.push(body),
		};
		await requestListener(req, res);

		assert.deepEqual(
			heads,
			[{
				status:  "test status",
				headers: "test headers",
			}],
		);
		assert.deepEqual(
			bodies,
			[ "test body" ],
		);
	});

	t.test("we break if handleRequest() throws an error", async () => {
		const fn = _ => { throw new Error("handler error"); };
		const routes = [[ "GET", "/route2", fn ]];
		const requestListener = makeRequestListener(buildRoutes(routes));
		const req = {
			method: "GET",
			url:    "/route2",
		};

		const heads  = [];
		const bodies = [];
		const res = {
			writeHead: (status, headers) => heads.push({ status, headers }),
			end: body => bodies.push(body),
		};

		await assert.rejects(
			async () => await requestListener(req, res),
			{ message: "handler error" },
		);

		assert.deepEqual(heads,  []);
		assert.deepEqual(bodies, []);
	});
};

const test_interceptorsFn = t => {
	const next = x => x;

	{
		t.start("interceptorsFn().requestId()");

		let i = 0;
		const uuidFn = () => `${i++}`;

		t.test("we add an id to whatever we receive", () => {
			assert.deepEqual(
				interceptorsFn({uuidFn}).requestId({}, next),
				{
					id: "0",
				},
			);
			assert.deepEqual(
				interceptorsFn({uuidFn}).requestId({ a: "existing data" }, next),
				{
					a: "existing data",
					id: "1",
				},
			);
		});

		t.test(`we overwrite the "id" if it already exists`, async () => {
			assert.deepEqual(
				interceptorsFn({uuidFn}).requestId({ id: "before" }, next),
				{
					id: "2",
				},
			);
		});
	}

	{
		t.start("interceptorsFn().logged()");

		t.test("we log before and after next()", async () => {
			const contents = [];
			const logger = x => contents.push(x);
			const status = 201;
			const req = {
				id: "an ID",
				url: "a URL",
				method: "a method",
			};

			assert.deepEqual(
				await interceptorsFn({logger}).logged(req, _ => ({ status })),
				{ status },
			);
			assert.deepEqual(
				contents,
				[
					{ ...req, type: "in-request"  },
					{ id: req.id, status, type: "in-response" },
				],
			);
		});
	}

	{
		t.start("interceptorsFn().contentType()");

		t.test("empty values", async () => {
			assert.deepEqual(
				await interceptorsFn().contentType({}, next),
				{
					body: "",
					headers: {
						"Content-Type": "application/json",
						"Content-Length": 0,
					},
				},
			);

			assert.deepEqual(
				await interceptorsFn().contentType({ body: "" }, next),
				{
					body: "",
					headers: {
						"Content-Type": "text/html",
						"Content-Length": 0,
					},
				},
			);
		});

		t.test("body values", async () => {
			assert.deepEqual(
				await interceptorsFn().contentType({ body: { a: 1 }}, next),
				{
					body: `{"a":1}`,
					headers: {
						"Content-Type": "application/json",
						"Content-Length": 7,
					},
				},
			);

			assert.deepEqual(
				await interceptorsFn().contentType({ body: "<br />" }, next),
				{
					body: "<br />",
					headers: {
						"Content-Type": "text/html",
						"Content-Length": 6,
					},
				},
			);
		});

		t.test("header values preference", async () => {
			assert.deepEqual(
				await interceptorsFn().contentType({
					body: "",
					headers: {
						"Content-Type": "we have preference",
						"Content-Length": "and so do we",
					},
				}, next),
				{
					body: "",
					headers: {
						"Content-Type": "we have preference",
						"Content-Length": "and so do we",
					},
				}
			);
		});

		t.test("headers get propagated", async () => {
			assert.deepEqual(
				await interceptorsFn().contentType({
					body: "",
					headers: {
						"My": "Header",
					},
				}, next),
				{
					body: "",
					headers: {
						"My": "Header",
						"Content-Type": "text/html",
						"Content-Length": 0,
					},
				},
			);
		});
	}

	{
		t.start("interceptorsFn().serverError()");

		t.test("no-op when no error occurs", async () => {
			assert.deepEqual(
				await interceptorsFn().serverError({ status: 1 }, next),
				{ status: 1 },
			);
		});

		t.test(`an error is thrown if "status" is missing`, async () => {
			const contents = [];
			const logger = x => contents.push(x);
			assert.deepEqual(
				await interceptorsFn({ logger }).serverError({ id: 123 }, next),
				{
					status: 500,
					body: "Internal Server Error",
				},
			);
			assert.deepEqual(
				contents,
				[{
					id: 123,
					type: "server-error-interceptor",
					message: `Missing "status"`,
				}],
			);
		});

		t.test("we turn a handler error into a 500 response", async () => {
			const contents = [];
			const logger = x => contents.push(x);
			assert.deepEqual(
				await interceptorsFn({ logger }).serverError(
					{ id: "some ID" },
					_ => { throw new Error("My test error message"); },
				),
				{
					status: 500,
					body: "Internal Server Error",
				},
			);
			assert.deepEqual(
				contents,
				[{
					id: "some ID",
					type: "server-error-interceptor",
					message: "My test error message",
				}],
			);
		});
	}
};

const test_chainInterceptors = t => {
	t.start("chainInterceptors()");

	t.test("empty values", () => {
		assert.equal(chainInterceptors([])("req"), "req");
	});

	t.test("the order of interceptors matter", () => {
		const a = [];

		const i1 = (req, next) => {
			a.push("i1");
			return next(req);
		};
		const i2 = (req, next) => {
			a.push("i2");
			return next(req);
		};

		assert.equal(chainInterceptors([i1, i2])("req"), "req");
		assert.deepEqual(a, ["i1", "i2"]);
		assert.equal(chainInterceptors([i2, i1])("req"), "req");
		assert.deepEqual(a, ["i1", "i2", "i2", "i1"]);
	});

	t.test("with ordering, interceptors implicitly depend on each other", () => {
		const i1 = (req, next) => next({ ...req, id: 1 });
		const i2 = (req, next) => next({ ...req, id: req.id + 1 });

		assert.deepEqual(
			chainInterceptors([i1, i2])({}),
			{ id: 2 },
		);

		assert.deepEqual(
			chainInterceptors([i2])({}),
			{ id: NaN },
		);

		assert.deepEqual(
			chainInterceptors([i2, i1])({}),
			{ id: 1 },
		);
	});

	t.test("we can chain async interceptors", async () => {
		const i1 = async (req, next) => await next({ ...req, i1: true });
		const i2 = async (req, next) => await next({ ...req, i2: true });

		assert.deepEqual(
			await chainInterceptors([i1, i2])({}),
			{
				i1: true,
				i2: true,
			},
		);
	});
};

const test_wrapHandler = t => {
	t.start("wrapHandler()");

	t.test("noop when arr is empty", () => {
		const fn = () => {};
		const wrappedFn1 = wrapHandler(fn, []);
		assert.deepEqual(fn, wrappedFn1);

		const wrappedFn2 = wrapHandler(fn, [ interceptors.requestId ]);
		assert.notDeepEqual(fn, wrappedFn2);
	});

	t.test("a handler with chained interceptors change its behaviour", async () => {
		let i = 0;
		const uuidFn = () => `${i++}`;

		const contents = [];
		const logger = x => contents.push(x);

		const interceptors = interceptorsFn({uuidFn, logger});

		const fn = async _ => await { status: 1, body: { a: 1 }};
		const wrappedFn = wrapHandler(fn, [
			interceptors.requestId,
			interceptors.logged,
			interceptors.contentType,
		]);

		const req = {
			url:    "URL",
			method: "METHOD",
		};

		assert.deepEqual(
			await fn(req),
			{ status: 1, body: { a: 1 }},
		);
		assert.deepEqual(contents, []);

		assert.deepEqual(
			await wrappedFn(req),
			{
				status: 1,
				body: `{"a":1}`,
				headers: {
					"Content-Type": "application/json",
					"Content-Length": 7,
				},
			},
		);
		assert.deepEqual(
			contents,
			[
				{
					id:     "0",
					url:    "URL",
					method: "METHOD",
					type:   "in-request",
				},
				{
					id:    "0",
					status: 1,
					type:   "in-response",
				},
			],
		);
	});
};

const test_buildRoutes = t => {
	t.start("buildRoutes()");

	t.test("empty values", () => {
		assert.deepEqual(buildRoutes([]), {});
	});

	t.test("overwrites", () => {
		const fn1 = () => {};
		const fn2 = () => {};

		const r1 = [ [ "GET", "/", fn1 ] ];
		const r2 = [ [ "GET", "/", fn2 ] ];

		assert.deepEqual(
			buildRoutes(r1),
			{
				static: {
					GET: {
						"": fn1,
					},
				},
			},
		);

		assert.deepEqual(
			buildRoutes(r2),
			{
				static: {
					GET: {
						"": fn2,
					},
				},
			},
		);

		assert.deepEqual(
			buildRoutes(r1.concat(r2)),
			buildRoutes(r2),
		);

		assert.deepEqual(
			buildRoutes(r2.concat(r1)),
			buildRoutes(r1),
		);
	});

	t.test("wrapped handler functions", async () => {
		const handler = req => ({ ...req, handled: true });
		const interceptor = (req, next) => next({ ...req, intercepted: true });

		const routes = [
			[ "GET", "/without", handler ],
			[ "GET", "/with",    handler, [ interceptor ] ],
		];

		const table = buildRoutes(routes);

		{
			const { handled, intercepted } =
				await handleRequest(table, "GET", "/without");
			assert.deepEqual(
				{ handled,       intercepted            },
				{ handled: true, intercepted: undefined },
			);
		}
		{
			const { handled, intercepted } =
				await handleRequest(table, "GET", "/with");
			assert.deepEqual(
				{ handled,       intercepted            },
				{ handled: true, intercepted: true      },
			);
		}
	});

	t.test("interceptors are combined", async () => {
		const handler = req => ({ ...req, handled: true });
		const interceptor1 = (req, next) => next({ ...req, interceptor1: true });
		const interceptor2 = (req, next) => next({ ...req, interceptor2: true });

		const routes = [
			[ "GET", "/global-only",      handler ],
			[ "GET", "/global-and-local", handler, [ interceptor2 ] ],
		];

		const table = buildRoutes(routes, [ interceptor1 ]);

		{
			const { handled, interceptor1, interceptor2 } =
				await handleRequest(table, "GET", "/global-only");
			assert.deepEqual(
				{ handled,       interceptor1,       interceptor2            },
				{ handled: true, interceptor1: true, interceptor2: undefined },
			);
		}
		{
			const { handled, interceptor1, interceptor2 } =
				await handleRequest(table, "GET", "/global-and-local");
			assert.deepEqual(
				{ handled,       interceptor1,       interceptor2       },
				{ handled: true, interceptor1: true, interceptor2: true },
			);
		}
	});

	t.test("multiple routes built", () => {
		const fn1 = () => {};
		const fn2 = () => {};
		const fn3 = () => {};
		const fn4 = () => {};
		const fn5 = () => {};

		const routes = [
			[ "GET",  "/",         fn1 ],
			[ "GET",  "/home",     fn2 ],
			[ "GET",  "/user",     fn3 ],
			[ "POST", "/user",     fn4 ],
			[ "GET",  "/user/:id", fn5 ],
		];

		assert.deepEqual(
			buildRoutes(routes),
			{
				static: {
					GET: {
						"": fn1,
						home: {
							"": fn2,
						},
						user: {
							"": fn3,
						},
					},
					POST: {
						user: {
							"": fn4,
						},
					},
				},
				dynamic: {
					GET: {
						user: {
							":id": {
								"": fn5,
							}
						}
					}
				},
			},
		);
	});
};

const test_promisifyServer = t => {
	t.start("promisifyServer()");

	t.test("we can access the underlying server ref", () => {
		const server = promisifyServer(http.createServer(() => {}));
		assert.ok(server.ref instanceof http.Server);
	});
};

const test_buildServer = t => {
	t.start("buildServer()");

	const socketRequest = (socketPath, path) =>
		new Promise((resolve, reject) => {
			const callback = res => {
				let body = "";
				res.on("data", chunk => body += chunk);
				res.on("error", reject);
				res.on("end", () => resolve({
					body,
					status: res.statusCode,
				}));
			};
			const request = http.request({
				socketPath,
				path,
			}, callback);
			request.end();
		});

	t.test("empty values", async () => {
		const socketPath = "./tests/hero-0.sock";
		const server = buildServer([]);

		await server.listen(socketPath);
		const response = await socketRequest(socketPath, "/anything");
		await server.close();

		assert.deepEqual(response, { status: 404, body: "Not Found" });
	});

	t.test("integrated application server", async () => {
		const socketPath = "./tests/hero-1.sock";
		const pathHandler  = req => ({ status: 200, body: "OK" });
		const globalInterceptors = [
			interceptors.serverError,
			interceptors.contentType,
			interceptors.requestId,
			interceptors.logged,
		];
		const routes = [ [ "GET", "/path", pathHandler ] ];
		const server = buildServer(routes, globalInterceptors);

		await server.listen(socketPath);
		const response = await socketRequest(socketPath, "/path");
		await server.close();

		assert.deepEqual(response, { status: 200, body: "OK" });
	});
};


await runTests([
	test_normalizeSegments,
	test_pathToSegments,
	test_hasPathParams,
	test_addRoute,
	test_findStaticHandler,
	test_firstParamMatch,
	test_findDynamicHandler,
	test_findHandler,
	test_extractQueryParams,
	test_handleRequest,
	test_makeRequestListener,
	test_interceptorsFn,
	test_chainInterceptors,
	test_wrapHandler,
	test_buildRoutes,
	test_promisifyServer,
	test_buildServer,
]);