local jid = require "util.jid";

describe("util.jid", function()

	describe("#join()", function()

		it("should work", function()

			assert.are.equal(jid.join("a", "b", "c"), "a@b/c", "builds full JID");

			assert.are.equal(jid.join("a", "b", nil), "a@b", "builds bare JID");

			assert.are.equal(jid.join(nil, "b", "c"), "b/c", "builds full host JID");

			assert.are.equal(jid.join(nil, "b", nil), "b", "builds bare host JID");

			assert.are.equal(jid.join(nil, nil, nil), nil, "invalid JID is nil");

			assert.are.equal(jid.join("a", nil, nil), nil, "invalid JID is nil");

			assert.are.equal(jid.join(nil, nil, "c"), nil, "invalid JID is nil");

			assert.are.equal(jid.join("a", nil, "c"), nil, "invalid JID is nil");

		end);

		it("should reject invalid arguments", function ()

			assert.has_error(function () jid.join(false, "bork", nil) end)

			assert.has_error(function () jid.join(nil, "bork", false) end)

			assert.has_error(function () jid.join(false, false, false) end)

		end)

	end);

	describe("#split()", function()

		it("should work", function()

			local function test(input_jid, expected_node, expected_server, expected_resource)

				local rnode, rserver, rresource = jid.split(input_jid);

				assert.are.equal(expected_node, rnode, "split("..tostring(input_jid)..") failed");

				assert.are.equal(expected_server, rserver, "split("..tostring(input_jid)..") failed");

				assert.are.equal(expected_resource, rresource, "split("..tostring(input_jid)..") failed");

			end

			-- Valid JIDs

			test("node@server", 		"node", "server", nil		);

			test("node@server/resource", 	"node", "server", "resource"        );

			test("server", 			nil, 	"server", nil               );

			test("server/resource", 	nil, 	"server", "resource"        );

			test("server/resource@foo", 	nil, 	"server", "resource@foo"    );

			test("server/resource@foo/bar",	nil, 	"server", "resource@foo/bar");

			-- Always invalid JIDs

			test(nil,                nil, nil, nil);

			test("node@/server",     nil, nil, nil);

			test("@server",          nil, nil, nil);

			test("@server/resource", nil, nil, nil);

			test("@/resource", nil, nil, nil);

		end);

		it("should reject invalid arguments", function ()

			assert.has_error(function () jid.split(false) end)

		end)

	end);

	describe("#prepped_split()", function()

		local function test(input_jid, expected_node, expected_server, expected_resource)

			local rnode, rserver, rresource = jid.prepped_split(input_jid);

			assert.are.equal(expected_node, rnode, "split("..tostring(input_jid)..") failed");

			assert.are.equal(expected_server, rserver, "split("..tostring(input_jid)..") failed");

			assert.are.equal(expected_resource, rresource, "split("..tostring(input_jid)..") failed");

		end

		it("should work", function()

			-- Valid JIDs

			test("node@server", 		"node", "server", nil		);

			test("node@server/resource", 	"node", "server", "resource"        );

			test("server", 			nil, 	"server", nil               );

			test("server/resource", 	nil, 	"server", "resource"        );

			test("server/resource@foo", 	nil, 	"server", "resource@foo"    );

			test("server/resource@foo/bar",	nil, 	"server", "resource@foo/bar");

			-- Always invalid JIDs

			test(nil,                nil, nil, nil);

			test("node@/server",     nil, nil, nil);

			test("@server",          nil, nil, nil);

			test("@server/resource", nil, nil, nil);

			test("@/resource", nil, nil, nil);

			test("@server/", nil, nil, nil);

			test("server/", nil, nil, nil);

			test("/resource", nil, nil, nil);

		end);

		it("should reject invalid arguments", function ()

			assert.has_error(function () jid.prepped_split(false) end)

		end)

		it("should strip empty root label", function ()

			test("node@server.", "node", "server", nil);

		end);

		it("should fail for JIDs that fail stringprep", function ()

			test("node@invalid-\128-server", nil, nil, nil);

			test("node@invalid-\194\128-server", nil, nil, nil);

			test("<invalid node>@server", nil, nil, nil);

			test("node@server/invalid-\000-resource", nil, nil, nil);

		end);

	end);

	describe("#bare()", function()

		it("should work", function()

			assert.are.equal(jid.bare("user@host"), "user@host", "bare JID remains bare");

			assert.are.equal(jid.bare("host"), "host", "Host JID remains host");

			assert.are.equal(jid.bare("host/resource"), "host", "Host JID with resource becomes host");

			assert.are.equal(jid.bare("user@host/resource"), "user@host", "user@host JID with resource becomes user@host");

			assert.are.equal(jid.bare("user@/resource"), nil, "invalid JID is nil");

			assert.are.equal(jid.bare("@/resource"), nil, "invalid JID is nil");

			assert.are.equal(jid.bare("@/"), nil, "invalid JID is nil");

			assert.are.equal(jid.bare("/"), nil, "invalid JID is nil");

			assert.are.equal(jid.bare(""), nil, "invalid JID is nil");

			assert.are.equal(jid.bare("@"), nil, "invalid JID is nil");

			assert.are.equal(jid.bare("user@"), nil, "invalid JID is nil");

			assert.are.equal(jid.bare("user@@"), nil, "invalid JID is nil");

			assert.are.equal(jid.bare("user@@host"), nil, "invalid JID is nil");

			assert.are.equal(jid.bare("user@@host/resource"), nil, "invalid JID is nil");

			assert.are.equal(jid.bare("user@host/"), nil, "invalid JID is nil");

		end);

		it("should reject invalid arguments", function ()

			assert.has_error(function () jid.bare(false) end)

		end)

	end);

	describe("#compare()", function()

		it("should work", function()

			assert.are.equal(jid.compare("host", "host"), true, "host should match");

			assert.are.equal(jid.compare("host", "other-host"), false, "host should not match");

			assert.are.equal(jid.compare("other-user@host/resource", "host"), true, "host should match");

			assert.are.equal(jid.compare("other-user@host", "user@host"), false, "user should not match");

			assert.are.equal(jid.compare("user@host", "host"), true, "host should match");

			assert.are.equal(jid.compare("user@host/resource", "host"), true, "host should match");

			assert.are.equal(jid.compare("user@host/resource", "user@host"), true, "user and host should match");

			assert.are.equal(jid.compare("user@other-host", "host"), false, "host should not match");

			assert.are.equal(jid.compare("user@other-host", "user@host"), false, "host should not match");

		end);

	end);

	local jid_escaping_test_vectors = {

		-- From https://xmpp.org/extensions/xep-0106.xml#examples sans @example.com

		[[space cadet]], [[space\20cadet]],

		[[call me "ishmael"]], [[call\20me\20\22ishmael\22]],

		[[at&t guy]], [[at\26t\20guy]],

		[[d'artagnan]], [[d\27artagnan]],

		[[/.fanboy]], [[\2f.fanboy]],

		[[::foo::]], [[\3a\3afoo\3a\3a]],

		[[<foo>]], [[\3cfoo\3e]],

		[[user@host]], [[user\40host]],

		[[c:\net]], [[c\3a\net]],

		[[c:\\net]], [[c\3a\\net]],

		[[c:\cool stuff]], [[c\3a\cool\20stuff]],

		[[c:\5commas]], [[c\3a\5c5commas]],

		-- Section 4.2

		[[\3and\2is\5cool]], [[\5c3and\2is\5c5cool]],

		-- From aioxmpp

		[[\5c]], [[\5c5c]],

    -- [[\5C]], [[\5C]],

    [[\2plus\2is\4]], [[\2plus\2is\4]],

    [[foo\bar]], [[foo\bar]],

    [[foo\41r]], [[foo\41r]],

    -- additional test vectors

    [[call\20me]], [[call\5c20me]],

	};

	describe("#escape()", function ()

		it("should work", function ()

			for i = 1, #jid_escaping_test_vectors, 2 do

				local original = jid_escaping_test_vectors[i];

				local escaped = jid_escaping_test_vectors[i+1];

				assert.are.equal(escaped, jid.escape(original), ("Escapes '%s' -> '%s'"):format(original, escaped));

			end

		end);

	end)

	describe("#unescape()", function ()

		it("should work", function ()

			for i = 1, #jid_escaping_test_vectors, 2 do

				local original = jid_escaping_test_vectors[i];

				local escaped = jid_escaping_test_vectors[i+1];

				assert.are.equal(original, jid.unescape(escaped), ("Unescapes '%s' -> '%s'"):format(escaped, original));

			end

		end);

	end)

	it("should work with nodes", function()

		local function test(_jid, expected_node)

			assert.are.equal(jid.node(_jid), expected_node, "Unexpected node for "..tostring(_jid));

		end

		test("example.com", nil);

		test("foo.example.com", nil);

		test("foo.example.com/resource", nil);

		test("foo.example.com/some resource", nil);

		test("foo.example.com/some@resource", nil);

		test("foo@foo.example.com/some@resource", "foo");

		test("foo@example/some@resource", "foo");

		test("foo@example/@resource", "foo");

		test("foo@example@resource", nil);

		test("foo@example", "foo");

		test("foo", nil);

		test(nil, nil);

	end);

	it("should work with hosts", function()

		local function test(_jid, expected_host)

			assert.are.equal(jid.host(_jid), expected_host, "Unexpected host for "..tostring(_jid));

		end

		test("example.com", "example.com");

		test("foo.example.com", "foo.example.com");

		test("foo.example.com/resource", "foo.example.com");

		test("foo.example.com/some resource", "foo.example.com");

		test("foo.example.com/some@resource", "foo.example.com");

		test("foo@foo.example.com/some@resource", "foo.example.com");

		test("foo@example/some@resource", "example");

		test("foo@example/@resource", "example");

		test("foo@example@resource", nil);

		test("foo@example", "example");

		test("foo", "foo");

		test(nil, nil);

	end);

	it("should work with resources", function()

		local function test(_jid, expected_resource)

			assert.are.equal(jid.resource(_jid), expected_resource, "Unexpected resource for "..tostring(_jid));

		end

		test("example.com", nil);

		test("foo.example.com", nil);

		test("foo.example.com/resource", "resource");

		test("foo.example.com/some resource", "some resource");

		test("foo.example.com/some@resource", "some@resource");

		test("foo@foo.example.com/some@resource", "some@resource");

		test("foo@example/some@resource", "some@resource");

		test("foo@example/@resource", "@resource");

		test("foo@example@resource", nil);

		test("foo@example", nil);

		test("foo", nil);

		test("/foo", nil);

		test("@x/foo", nil);

		test("@/foo", nil);

		test(nil, nil);

	end);

end);