/*
 * Copyright 2012 LinkedIn Corp.
 * 
 * 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 azkaban.project;

import java.io.File;
import java.util.Collection;
import java.util.List;
import java.util.Map;

import azkaban.flow.Flow;
import azkaban.project.ProjectLogEvent.EventType;
import azkaban.user.Permission;
import azkaban.user.User;
import azkaban.utils.Props;
import azkaban.utils.Triple;

public interface ProjectLoader {

	/**
	 * Returns all projects which are active
	 * 
	 * @return
	 * @throws ProjectManagerException
	 */
	public List<Project> fetchAllActiveProjects() throws ProjectManagerException;
	
	/**
	 * Loads whole project, including permissions, by the project id.
	 * 
	 * @param id
	 * @return
	 * @throws ProjectManagerException
	 */
	public Project fetchProjectById(int id) throws ProjectManagerException;
	
	/**
	 * Should create an empty project with the given name and user and adds it
	 * to the data store. It will auto assign a unique id for this project if
	 * successful.
	 * 
	 * If an active project of the same name exists, it will throw an exception.
	 * If the name and description of the project exceeds the store's
	 * constraints, it will throw an exception.
	 * 
	 * @param name
	 * @return
	 * @throws ProjectManagerException if an active project of the same name exists.
	 */
	public Project createNewProject(String name, String description, User creator) throws ProjectManagerException;
	
	/**
	 * Removes the project by marking it inactive.
	 * 
	 * @param project
	 * @throws ProjectManagerException
	 */
	public void removeProject(Project project, String user) throws ProjectManagerException;
	
	/**
	 * Adds and updates the user permissions. Does not check if the user is valid.
	 * If the permission doesn't exist, it adds. If the permission exists, it updates.
	 * 
	 * @param project
	 * @param name
	 * @param perm
	 * @param isGroup
	 * @throws ProjectManagerException
	 */
	public void updatePermission(Project project, String name, Permission perm, boolean isGroup) throws ProjectManagerException;
	
	public void removePermission(Project project, String name, boolean isGroup) throws ProjectManagerException;
	
	/**
	 * Modifies and commits the project description.
	 * 
	 * @param project
	 * @param description
	 * @throws ProjectManagerException
	 */
	public void updateDescription(Project project, String description, String user) throws ProjectManagerException;
	
	/**
	 * Stores logs for a particular project. Will soft fail rather than throw exception.
	 * 
	 * @param project
	 * @param type
	 * @param message
	 * return true if the posting was success.
	 */
	public boolean postEvent(Project project, EventType type, String user, String message);
	
	/**
	 * Returns all the events for a project sorted
	 * 
	 * @param project
	 * @return
	 */
	public List<ProjectLogEvent> getProjectEvents(Project project, int num, int skip) throws ProjectManagerException;
	
	/**
	 * Will upload the files and return the version number of the file uploaded.
	 */
	public void uploadProjectFile(Project project, int version, String filetype, String filename, File localFile, String user) throws ProjectManagerException;
	
	/**
	 * Get file that's uploaded.
	 * 
	 * @return
	 */
	public ProjectFileHandler getUploadedFile(Project project, int version) throws ProjectManagerException;
	
	/**
	 * Get file that's uploaded.
	 * 
	 * @return
	 */
	public ProjectFileHandler getUploadedFile(int projectId, int version) throws ProjectManagerException;
	
	/**
	 * Changes and commits different project version.
	 * 
	 * @param project
	 * @param version
	 * @throws ProjectManagerException
	 */
	public void changeProjectVersion(Project project, int version, String user) throws ProjectManagerException;


	public void updateFlow(Project project, int version, Flow flow) throws ProjectManagerException;
	
	/**
	 * Uploads all computed flows
	 * 
	 * @param project
	 * @param version
	 * @param flows
	 * @throws ProjectManagerException
	 */
	public void uploadFlows(Project project, int version, Collection<Flow> flows) throws ProjectManagerException;
	
	/**
	 * Upload just one flow.
	 * 
	 * @param project
	 * @param version
	 * @param flow
	 * @throws ProjectManagerException
	 */
	public void uploadFlow(Project project, int version, Flow flow) throws ProjectManagerException;
	
	/**
	 * Fetches one particular flow.
	 * 
	 * @param project
	 * @param version
	 * @param flowId
	 * @throws ProjectManagerException
	 */
	public Flow fetchFlow(Project project, String flowId) throws ProjectManagerException;
	
	/**
	 * Fetches all flows.
	 * 
	 * @param project
	 * @param version
	 * @param flowId
	 * @throws ProjectManagerException
	 */
	public List<Flow> fetchAllProjectFlows(Project project) throws ProjectManagerException;
	
	/**
	 * Gets the latest upload version.
	 */
	public int getLatestProjectVersion(Project project) throws ProjectManagerException;
	
	/**
	 * Upload Project properties
	 * 
	 * @param project
	 * @param path
	 * @param properties
	 * @throws ProjectManagerException
	 */
	public void uploadProjectProperty(Project project, Props props) throws ProjectManagerException;
	
	/**
	 * Upload Project properties. Map contains key value of path and properties
	 * 
	 * @param project
	 * @param path
	 * @param properties
	 * @throws ProjectManagerException
	 */
	public void uploadProjectProperties(Project project, List<Props> properties) throws ProjectManagerException;
	
	/**
	 * Fetch project properties
	 * 
	 * @param project
	 * @param propsName
	 * @return
	 * @throws ProjectManagerException
	 */
	public Props fetchProjectProperty(Project project, String propsName) throws ProjectManagerException;
	
	/**
	 * Fetch all project properties
	 * 
	 * @param project
	 * @return
	 * @throws ProjectManagerException
	 */
	public Map<String,Props> fetchProjectProperties(int projectId, int version) throws ProjectManagerException;
	
	/**
	 * Cleans all project versions less tha
	 * 
	 * @param projectId
	 * @param version
	 * @throws ProjectManagerException
	 */
	public void cleanOlderProjectVersion(int projectId, int version) throws ProjectManagerException;

	public void updateProjectProperty(Project project, Props props) throws ProjectManagerException;

	Props fetchProjectProperty(int projectId, int projectVer, String propsName) throws ProjectManagerException;

	List<Triple<String, Boolean, Permission>> getProjectPermissions(int projectId) throws ProjectManagerException;

	void updateProjectSettings(Project project) throws ProjectManagerException;
	
}
