/*
 * Copyright 1999-2018 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;

import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.auth.annotation.Secured;
import com.alibaba.nacos.common.model.RestResult;
import com.alibaba.nacos.common.model.RestResultUtils;
import com.alibaba.nacos.common.utils.StringUtils;
import com.alibaba.nacos.console.paramcheck.ConsoleDefaultHttpParamExtractor;
import com.alibaba.nacos.core.namespace.repository.NamespacePersistService;
import com.alibaba.nacos.core.namespace.model.Namespace;
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.impl.constant.AuthConstants;
import org.springframework.beans.factory.annotation.Autowired;
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;

/**
 * namespace service.
 *
 * @author Nacos
 */
@RestController
@RequestMapping("/v1/console/namespaces")
@ExtractorManager.Extractor(httpExtractor = ConsoleDefaultHttpParamExtractor.class)
public class NamespaceController {

	@Autowired
	private NamespacePersistService namespacePersistService;

	@Autowired
	private NamespaceOperationService namespaceOperationService;

	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
	public RestResult<List<Namespace>> getNamespaces() {
		return RestResultUtils.success(namespaceOperationService.getNamespaceList());
	}

	/**
	 * get namespace all info by namespace id.
	 * @param namespaceId namespaceId
	 * @return namespace all info
	 */
	@GetMapping(params = "show=all")
	public Namespace getNamespace(@RequestParam("namespaceId") String namespaceId) throws NacosException {
		return namespaceOperationService.getNamespace(namespaceId);
	}

	/**
	 * create namespace.
	 * @param namespaceName namespace Name
	 * @param namespaceDesc namespace Desc
	 * @return whether create ok
	 */
	@PostMapping
	@Secured(resource = AuthConstants.CONSOLE_RESOURCE_NAME_PREFIX + "namespaces", action = ActionTypes.WRITE)
	public Boolean createNamespace(@RequestParam("customNamespaceId") String namespaceId,
			@RequestParam("namespaceName") String namespaceName,
			@RequestParam(value = "namespaceDesc", required = false) String namespaceDesc) {
		if (StringUtils.isBlank(namespaceId)) {
			namespaceId = UUID.randomUUID().toString();
		}
		else {
			namespaceId = namespaceId.trim();
			if (!namespaceIdCheckPattern.matcher(namespaceId).matches()) {
				return false;
			}
			if (namespaceId.length() > NAMESPACE_ID_MAX_LENGTH) {
				return false;
			}
			// check unique
			if (namespacePersistService.tenantInfoCountByTenantId(namespaceId) > 0) {
				return false;
			}
		}
		// contains illegal chars
		if (!namespaceNameCheckPattern.matcher(namespaceName).matches()) {
			return false;
		}
		try {
			return namespaceOperationService.createNamespace(namespaceId, namespaceName, namespaceDesc);
		}
		catch (NacosException e) {
			return false;
		}
	}

	/**
	 * check namespaceId exist.
	 * @param namespaceId namespace id
	 * @return true if exist, otherwise false
	 */
	@GetMapping(params = "checkNamespaceIdExist=true")
	public Boolean checkNamespaceIdExist(@RequestParam("customNamespaceId") String namespaceId) {
		if (StringUtils.isBlank(namespaceId)) {
			return false;
		}
		return (namespacePersistService.tenantInfoCountByTenantId(namespaceId) > 0);
	}

	/**
	 * edit namespace.
	 * @param namespace namespace
	 * @param namespaceShowName namespace ShowName
	 * @param namespaceDesc namespace Desc
	 * @return whether edit ok
	 */
	@PutMapping
	@Secured(resource = AuthConstants.CONSOLE_RESOURCE_NAME_PREFIX + "namespaces", action = ActionTypes.WRITE)
	public Boolean editNamespace(@RequestParam("namespace") String namespace,
			@RequestParam("namespaceShowName") String namespaceShowName,
			@RequestParam(value = "namespaceDesc", required = false) String namespaceDesc) {
		// contains illegal chars
		if (!namespaceNameCheckPattern.matcher(namespaceShowName).matches()) {
			return false;
		}
		return namespaceOperationService.editNamespace(namespace, namespaceShowName, namespaceDesc);
	}

	/**
	 * del namespace by id.
	 * @param namespaceId namespace Id
	 * @return whether del ok
	 */
	@DeleteMapping
	@Secured(resource = AuthConstants.CONSOLE_RESOURCE_NAME_PREFIX + "namespaces", action = ActionTypes.WRITE)
	public Boolean deleteNamespace(@RequestParam("namespaceId") String namespaceId) {
		return namespaceOperationService.removeNamespace(namespaceId);
	}

}
