/*
 * Copyright 1999-2022 Alibaba Group Holding Ltd.
 *
 * 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.
 */

package com.alibaba.nacos.console.controller.v2;

import com.alibaba.nacos.api.annotation.NacosApi;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.exception.api.NacosApiException;
import com.alibaba.nacos.api.model.v2.ErrorCode;
import com.alibaba.nacos.api.model.v2.Result;
import com.alibaba.nacos.auth.annotation.Secured;
import com.alibaba.nacos.common.utils.StringUtils;
import com.alibaba.nacos.console.paramcheck.ConsoleDefaultHttpParamExtractor;
import com.alibaba.nacos.core.namespace.model.Namespace;
import com.alibaba.nacos.core.namespace.model.form.NamespaceForm;
import com.alibaba.nacos.core.namespace.repository.NamespacePersistService;
import com.alibaba.nacos.core.paramcheck.ExtractorManager;
import com.alibaba.nacos.core.service.NamespaceOperationService;
import com.alibaba.nacos.plugin.auth.constant.ActionTypes;
import com.alibaba.nacos.plugin.auth.constant.SignType;
import com.alibaba.nacos.plugin.auth.impl.constant.AuthConstants;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;
import java.util.UUID;
import java.util.regex.Pattern;

/**
 * NamespaceControllerV2.
 *
 * @author dongyafei
 * @date 2022/8/16
 */
@NacosApi
@RestController
@RequestMapping("/v2/console/namespace")
@ExtractorManager.Extractor(httpExtractor = ConsoleDefaultHttpParamExtractor.class)
public class NamespaceControllerV2 {

	private final NamespaceOperationService namespaceOperationService;

	private NamespacePersistService namespacePersistService;

	public NamespaceControllerV2(NamespaceOperationService namespaceOperationService,
			NamespacePersistService namespacePersistService) {
		this.namespaceOperationService = namespaceOperationService;
		this.namespacePersistService = namespacePersistService;
	}

	private final Pattern namespaceIdCheckPattern = Pattern.compile("^[\\w-]+");

	private final Pattern namespaceNameCheckPattern = Pattern.compile("^[^@#$%^&*]+$");

	private static final int NAMESPACE_ID_MAX_LENGTH = 128;

	/**
	 * Get namespace list.
	 * @return namespace list
	 */
	@GetMapping("/list")
	public Result<List<Namespace>> getNamespaceList() {
		return Result.success(namespaceOperationService.getNamespaceList());
	}

	/**
	 * get namespace all info by namespace id.
	 * @param namespaceId namespaceId
	 * @return namespace all info
	 */
	@GetMapping()
	@Secured(resource = AuthConstants.CONSOLE_RESOURCE_NAME_PREFIX + "namespaces", action = ActionTypes.READ,
			signType = SignType.CONSOLE)
	public Result<Namespace> getNamespace(@RequestParam("namespaceId") String namespaceId) throws NacosException {
		return Result.success(namespaceOperationService.getNamespace(namespaceId));
	}

	/**
	 * create namespace.
	 * @param namespaceForm namespaceForm.
	 * @return whether create ok
	 */
	@PostMapping
	@Secured(resource = AuthConstants.CONSOLE_RESOURCE_NAME_PREFIX + "namespaces", action = ActionTypes.WRITE,
			signType = SignType.CONSOLE)
	public Result<Boolean> createNamespace(NamespaceForm namespaceForm) throws NacosException {

		namespaceForm.validate();

		String namespaceId = namespaceForm.getNamespaceId();
		String namespaceName = namespaceForm.getNamespaceName();
		String namespaceDesc = namespaceForm.getNamespaceDesc();

		if (StringUtils.isBlank(namespaceId)) {
			namespaceId = UUID.randomUUID().toString();
		}
		else {
			namespaceId = namespaceId.trim();
			if (!namespaceIdCheckPattern.matcher(namespaceId).matches()) {
				throw new NacosApiException(HttpStatus.BAD_REQUEST.value(), ErrorCode.ILLEGAL_NAMESPACE,
						"namespaceId [" + namespaceId + "] mismatch the pattern");
			}
			if (namespaceId.length() > NAMESPACE_ID_MAX_LENGTH) {
				throw new NacosApiException(HttpStatus.BAD_REQUEST.value(), ErrorCode.ILLEGAL_NAMESPACE,
						"too long namespaceId, over " + NAMESPACE_ID_MAX_LENGTH);
			}
			// check unique
			if (namespacePersistService.tenantInfoCountByTenantId(namespaceId) > 0) {
				throw new NacosApiException(HttpStatus.BAD_REQUEST.value(), ErrorCode.ILLEGAL_NAMESPACE,
						"the namespaceId is existed, namespaceId: " + namespaceForm.getNamespaceId());
			}
		}
		// contains illegal chars
		if (!namespaceNameCheckPattern.matcher(namespaceName).matches()) {
			throw new NacosApiException(HttpStatus.BAD_REQUEST.value(), ErrorCode.ILLEGAL_NAMESPACE,
					"namespaceName [" + namespaceName + "] contains illegal char");
		}
		return Result.success(namespaceOperationService.createNamespace(namespaceId, namespaceName, namespaceDesc));
	}

	/**
	 * edit namespace.
	 * @param namespaceForm namespace params
	 * @return whether edit ok
	 */
	@PutMapping
	@Secured(resource = AuthConstants.CONSOLE_RESOURCE_NAME_PREFIX + "namespaces", action = ActionTypes.WRITE,
			signType = SignType.CONSOLE)
	public Result<Boolean> editNamespace(NamespaceForm namespaceForm) throws NacosException {
		namespaceForm.validate();
		// contains illegal chars
		if (!namespaceNameCheckPattern.matcher(namespaceForm.getNamespaceName()).matches()) {
			throw new NacosApiException(HttpStatus.BAD_REQUEST.value(), ErrorCode.ILLEGAL_NAMESPACE,
					"namespaceName [" + namespaceForm.getNamespaceName() + "] contains illegal char");
		}
		return Result.success(namespaceOperationService.editNamespace(namespaceForm.getNamespaceId(),
				namespaceForm.getNamespaceName(), namespaceForm.getNamespaceDesc()));
	}

	/**
	 * delete namespace by id.
	 * @param namespaceId namespace ID
	 * @return whether delete ok
	 */
	@DeleteMapping
	@Secured(resource = AuthConstants.CONSOLE_RESOURCE_NAME_PREFIX + "namespaces", action = ActionTypes.WRITE,
			signType = SignType.CONSOLE)
	public Result<Boolean> deleteNamespace(@RequestParam("namespaceId") String namespaceId) {
		return Result.success(namespaceOperationService.removeNamespace(namespaceId));
	}

}
