// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:file/file.dart';
import 'package:file/memory.dart';
import 'package:flutter_tools/src/base/logger.dart';
import 'package:flutter_tools/src/base/terminal.dart';
import 'package:flutter_tools/src/cmake_project.dart';
import 'package:flutter_tools/src/migrations/cmake_custom_command_migration.dart';
import 'package:flutter_tools/src/migrations/cmake_native_assets_migration.dart';
import 'package:test/fake.dart';

import '../../src/common.dart';

void main () {
  group('CMake project migration', () {
    group('migrate add_custom_command() to use VERBATIM', () {
      late MemoryFileSystem memoryFileSystem;
      late BufferLogger testLogger;
      late FakeCmakeProject mockCmakeProject;
      late File managedCmakeFile;

      setUp(() {
        memoryFileSystem = MemoryFileSystem.test();
        managedCmakeFile = memoryFileSystem.file('CMakeLists.txtx');

        testLogger = BufferLogger(
          terminal: Terminal.test(),
          outputPreferences: OutputPreferences.test(),
        );

        mockCmakeProject = FakeCmakeProject(managedCmakeFile);
      });

      testWithoutContext('skipped if files are missing', () async {
        final CmakeCustomCommandMigration cmakeProjectMigration = CmakeCustomCommandMigration(
          mockCmakeProject,
          testLogger,
        );
        await cmakeProjectMigration.migrate();
        expect(managedCmakeFile.existsSync(), isFalse);

        expect(testLogger.traceText, contains('CMake project not found, skipping add_custom_command() VERBATIM migration'));
        expect(testLogger.statusText, isEmpty);
      });

      testWithoutContext('skipped if nothing to migrate', () async {
        const String contents = 'Nothing to migrate';
        managedCmakeFile.writeAsStringSync(contents);
        final DateTime projectLastModified = managedCmakeFile.lastModifiedSync();

        final CmakeCustomCommandMigration cmakeProjectMigration = CmakeCustomCommandMigration(
          mockCmakeProject,
          testLogger,
        );
        await cmakeProjectMigration.migrate();

        expect(managedCmakeFile.lastModifiedSync(), projectLastModified);
        expect(managedCmakeFile.readAsStringSync(), contents);

        expect(testLogger.statusText, isEmpty);
      });

      testWithoutContext('skipped if already migrated', () async {
        const String contents = r'''
add_custom_command(
  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
  COMMAND ${CMAKE_COMMAND} -E env
    ${FLUTTER_TOOL_ENVIRONMENT}
    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
      ${FLUTTER_TARGET_PLATFORM} ${CMAKE_BUILD_TYPE}
  VERBATIM
)
''';
        managedCmakeFile.writeAsStringSync(contents);
        final DateTime projectLastModified = managedCmakeFile.lastModifiedSync();

        final CmakeCustomCommandMigration cmakeProjectMigration = CmakeCustomCommandMigration(
          mockCmakeProject,
          testLogger,
        );
        await cmakeProjectMigration.migrate();

        expect(managedCmakeFile.lastModifiedSync(), projectLastModified);
        expect(managedCmakeFile.readAsStringSync(), contents);

        expect(testLogger.statusText, isEmpty);
      });

      testWithoutContext('is migrated to use VERBATIM', () async {
        managedCmakeFile.writeAsStringSync(r'''
add_custom_command(
  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
  COMMAND ${CMAKE_COMMAND} -E env
    ${FLUTTER_TOOL_ENVIRONMENT}
    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
      ${FLUTTER_TARGET_PLATFORM} ${CMAKE_BUILD_TYPE}
)
''');

        final CmakeCustomCommandMigration cmakeProjectMigration = CmakeCustomCommandMigration(
          mockCmakeProject,
          testLogger,
        );
        await cmakeProjectMigration.migrate();

        expect(managedCmakeFile.readAsStringSync(), r'''
add_custom_command(
  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
  COMMAND ${CMAKE_COMMAND} -E env
    ${FLUTTER_TOOL_ENVIRONMENT}
    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
      ${FLUTTER_TARGET_PLATFORM} ${CMAKE_BUILD_TYPE}
  VERBATIM
)
''');

        expect(testLogger.statusText, contains('add_custom_command() missing VERBATIM or FLUTTER_TARGET_PLATFORM, updating.'));
      });

      testWithoutContext('is migrated to use FLUTTER_TARGET_PLATFORM', () async {
        managedCmakeFile.writeAsStringSync(r'''
add_custom_command(
  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
  COMMAND ${CMAKE_COMMAND} -E env
    ${FLUTTER_TOOL_ENVIRONMENT}
    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
      linux-x64 ${CMAKE_BUILD_TYPE}
  VERBATIM
)
''');

        final CmakeCustomCommandMigration cmakeProjectMigration = CmakeCustomCommandMigration(
          mockCmakeProject,
          testLogger,
        );
        await cmakeProjectMigration.migrate();

        expect(managedCmakeFile.readAsStringSync(), r'''
add_custom_command(
  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
  COMMAND ${CMAKE_COMMAND} -E env
    ${FLUTTER_TOOL_ENVIRONMENT}
    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
      ${FLUTTER_TARGET_PLATFORM} ${CMAKE_BUILD_TYPE}
  VERBATIM
)
''');

        expect(testLogger.statusText, contains('add_custom_command() missing VERBATIM or FLUTTER_TARGET_PLATFORM, updating.'));
      });
    });

    group('migrate add install() NATIVE_ASSETS_DIR command', () {
      late MemoryFileSystem memoryFileSystem;
      late BufferLogger testLogger;
      late FakeCmakeProject mockCmakeProject;
      late File managedCmakeFile;

      setUp(() {
        memoryFileSystem = MemoryFileSystem.test();
        managedCmakeFile = memoryFileSystem.file('CMakeLists.txtx');

        testLogger = BufferLogger(
          terminal: Terminal.test(),
          outputPreferences: OutputPreferences.test(),
        );

        mockCmakeProject = FakeCmakeProject(managedCmakeFile);
      });

      testWithoutContext('skipped if files are missing', () async {
        final CmakeNativeAssetsMigration cmakeProjectMigration = CmakeNativeAssetsMigration(
          mockCmakeProject,
          'linux',
          testLogger,
        );
        await cmakeProjectMigration.migrate();
        expect(managedCmakeFile.existsSync(), isFalse);

        expect(testLogger.traceText, contains('CMake project not found, skipping install() NATIVE_ASSETS_DIR migration.'));
        expect(testLogger.statusText, isEmpty);
      });

      testWithoutContext('skipped if nothing to migrate', () async {
        const String contents = 'Nothing to migrate';
        managedCmakeFile.writeAsStringSync(contents);
        final DateTime projectLastModified = managedCmakeFile.lastModifiedSync();

        final CmakeNativeAssetsMigration cmakeProjectMigration = CmakeNativeAssetsMigration(
          mockCmakeProject,
          'linux',
          testLogger,
        );
        await cmakeProjectMigration.migrate();

        expect(managedCmakeFile.lastModifiedSync(), projectLastModified);
        expect(managedCmakeFile.readAsStringSync(), contents);

        expect(testLogger.statusText, isEmpty);
      });

      testWithoutContext('skipped if already migrated', () async {
        const String contents = r'''
# Copy the native assets provided by the build.dart from all packages.
set(NATIVE_ASSETS_DIR "${PROJECT_BUILD_DIR}native_assets/linux/")
install(DIRECTORY "${NATIVE_ASSETS_DIR}"
   DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
   COMPONENT Runtime)
''';
        managedCmakeFile.writeAsStringSync(contents);
        final DateTime projectLastModified = managedCmakeFile.lastModifiedSync();

        final CmakeNativeAssetsMigration cmakeProjectMigration = CmakeNativeAssetsMigration(
          mockCmakeProject,
          'linux',
          testLogger,
        );
        await cmakeProjectMigration.migrate();

        expect(managedCmakeFile.lastModifiedSync(), projectLastModified);
        expect(managedCmakeFile.readAsStringSync(), contents);

        expect(testLogger.statusText, isEmpty);
      });

      for (final String os in <String>['linux', 'windows']) {
        testWithoutContext('is migrated to copy native assets', () async {
          managedCmakeFile.writeAsStringSync(r'''
foreach(bundled_library ${PLUGIN_BUNDLED_LIBRARIES})
  install(FILES "${bundled_library}"
    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
    COMPONENT Runtime)
endforeach(bundled_library)

# Fully re-copy the assets directory on each build to avoid having stale files
# from a previous install.
set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
install(CODE "
  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
  " COMPONENT Runtime)
install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
''');

          final CmakeNativeAssetsMigration cmakeProjectMigration = CmakeNativeAssetsMigration(
            mockCmakeProject,
            os,
            testLogger,
          );
          await cmakeProjectMigration.migrate();

          expect(managedCmakeFile.readAsStringSync(), '''
foreach(bundled_library \${PLUGIN_BUNDLED_LIBRARIES})
  install(FILES "\${bundled_library}"
    DESTINATION "\${INSTALL_BUNDLE_LIB_DIR}"
    COMPONENT Runtime)
endforeach(bundled_library)

# Copy the native assets provided by the build.dart from all packages.
set(NATIVE_ASSETS_DIR "\${PROJECT_BUILD_DIR}native_assets/$os/")
install(DIRECTORY "\${NATIVE_ASSETS_DIR}"
  DESTINATION "\${INSTALL_BUNDLE_LIB_DIR}"
  COMPONENT Runtime)

# Fully re-copy the assets directory on each build to avoid having stale files
# from a previous install.
set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
install(CODE "
  file(REMOVE_RECURSE \\"\${INSTALL_BUNDLE_DATA_DIR}/\${FLUTTER_ASSET_DIR_NAME}\\")
  " COMPONENT Runtime)
install(DIRECTORY "\${PROJECT_BUILD_DIR}/\${FLUTTER_ASSET_DIR_NAME}"
  DESTINATION "\${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
''');

          expect(testLogger.statusText,
              contains('CMake missing install() NATIVE_ASSETS_DIR command, updating.'));
        });
      }
    });
  });
}

class FakeCmakeProject extends Fake implements CmakeBasedProject {
  FakeCmakeProject(this.managedCmakeFile);

  @override
  final File managedCmakeFile;
}