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// Copyright 2025 Shota FUJI
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

using GLib;

namespace Moo {
	namespace Tests {
		public void add_metadata_tests() {
			Test.add_func("/libmoo/metadata/parse-realistic", () => {
				try {
					var metadata = new Metadata.from_string("MOO/1 REQUEST foo/bar\n");
					assert(metadata.version == 1);
					assert(metadata.verb == "REQUEST");
					assert(metadata.service == "foo/bar");
				} catch (Error e) {
					assert_no_error(e);
				}

				try {
					var metadata = new Metadata.from_string("MOO/20 COMPLETE foo\n");
					assert(metadata.version == 20);
					assert(metadata.verb == "COMPLETE");
					assert(metadata.service == "foo");
				} catch (Error e) {
					assert_no_error(e);
				}
			});

			Test.add_func("/libmoo/metadata/reject-invalid-signatures", () => {
				string[] fixtures = { "", "\n", "MOO1 REQUEST foo/bar\n", "MEOW/1 REQUEST foo/bar\n" };

				foreach (var fixture in fixtures) {
					try {
						new Metadata.from_string(fixture);
						message("Expected an error, but parsing succeeded");
						assert_not_reached();
					} catch (MetadataParseError e) {
						if (!(e is MetadataParseError.NOT_A_MOO_MESSAGE)) {
							message(
								"Expected an NOT_A_MOO_MESSAGE(%d), got %d",
								MetadataParseError.NOT_A_MOO_MESSAGE, e.code
							);
							assert_not_reached();
						}
					}
				}
			});

			Test.add_func("/libmoo/metadata/reject-invalid-versions", () => {
				string[] fixtures = {
					"MOO/1.0 REQUEST foo/bar\n",
					"MOO/-1 REQUEST foo/bar\n",
					"MOO/ REQUEST foo/bar\n",
					"MOO/0x1 REQUEST foo/bar\n",
					"MOO/one REQUEST foo/bar\n",
				};

				foreach (var fixture in fixtures) {
					try {
						new Metadata.from_string(fixture);
						message("Expected an error, but parsing succeeded");
						message(fixture);
						assert_not_reached();
					} catch (MetadataParseError e) {
						if (!(e is MetadataParseError.NOT_A_MOO_MESSAGE)) {
							message(
								"Expected an NOT_A_MOO_MESSAGE(%d), got %d",
								MetadataParseError.NOT_A_MOO_MESSAGE, e.code
							);
							message(fixture);
							assert_not_reached();
						}
					}
				}
			});

			Test.add_func("/libmoo/metadata/reject-unsupported-versions", () => {
				string[] fixtures = { "MOO/0 REQUEST foo/bar\n" };

				foreach (var fixture in fixtures) {
					try {
						new Metadata.from_string(fixture);
						message("Expected an error, but parsing succeeded");
						message(fixture);
						assert_not_reached();
					} catch (MetadataParseError e) {
						if (!(e is MetadataParseError.UNSUPPORTED_VERSION)) {
							message(
								"Expected an UNSUPPORTED_VERSION(%d), got %d",
								MetadataParseError.UNSUPPORTED_VERSION, e.code
							);
							message(fixture);
							assert_not_reached();
						}
					}
				}
			});

			Test.add_func("/libmoo/metadata/reject-invalid-verbs", () => {
				string[] fixtures = {
					// lowercase
					"MOO/1 request foo/bar\n",
					// non-alphabet
					"MOO/1 RÉQUEST foo/bar\n",
					// number is not in alphabet
					"MOO/1 REQUEST1 foo/bar\n",
					// emoji
					"MOO/1 RE❓️UEST foo/bar\n",
					// missing
					"MOO/1 \n",
					// missing
					"MOO/1 foo/bar\n",
				};

				foreach (var fixture in fixtures) {
					try {
						new Metadata.from_string(fixture);
						message("Expected an error, but parsing succeeded");
						message(fixture);
						assert_not_reached();
					} catch (MetadataParseError e) {
						if (!(e is MetadataParseError.NOT_A_MOO_MESSAGE)) {
							message(
								"Expected an NOT_A_MOO_MESSAGE(%d), got %d",
								MetadataParseError.NOT_A_MOO_MESSAGE, e.code
							);
							message(fixture);
							assert_not_reached();
						}
					}
				}
			});

			Test.add_func("/libmoo/metadata/reject-invalid-services", () => {
				string[] fixtures = {
					"MOO/1 REQUEST \n",
					"MOO/1 REQUEST ",
				};

				foreach (var fixture in fixtures) {
					try {
						new Metadata.from_string(fixture);
						message("Expected an error, but parsing succeeded");
						message(fixture);
						assert_not_reached();
					} catch (MetadataParseError e) {
						if (!(e is MetadataParseError.NOT_A_MOO_MESSAGE)) {
							message(
								"Expected an NOT_A_MOO_MESSAGE(%d), got %d",
								MetadataParseError.NOT_A_MOO_MESSAGE, e.code
							);
							message(fixture);
							assert_not_reached();
						}
					}
				}
			});

			Test.add_func("/libmoo/metadata/reject-unsupported-services", () => {
				string[] fixtures = {
					// invalid UTF-8 bytes
					"MOO/1 REQUEST \xc3\x28\n",
				};

				foreach (var fixture in fixtures) {
					try {
						new Metadata.from_string(fixture);
						message("Expected an error, but parsing succeeded");
						message(fixture);
						assert_not_reached();
					} catch (MetadataParseError e) {
						if (!(e is MetadataParseError.UNSUPPORTED_SERVICE_NAME)) {
							message(
								"Expected an UNSUPPORTED_SERVICE_NAME(%d), got %d",
								MetadataParseError.UNSUPPORTED_SERVICE_NAME, e.code
							);
							message(fixture);
							assert_not_reached();
						}
					}
				}
			});
		}
	}
}