package org.activityinfo.legacy.shared.model;

/*
 * #%L
 * ActivityInfo Server
 * %%
 * Copyright (C) 2009 - 2013 UNICEF
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import com.bedatadriven.rebar.time.calendar.LocalDate;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.Multimap;

import java.util.Collection;
import java.util.Date;

public class LockedPeriodSet {

    private Multimap<Integer, LockedPeriodDTO> activityLocks = HashMultimap.create();
    private Multimap<Integer, LockedPeriodDTO> projectLocks = HashMultimap.create();

    public LockedPeriodSet(SchemaDTO schema) {
        for (UserDatabaseDTO db : schema.getDatabases()) {
            indexLocks(db);
        }
    }

    public LockedPeriodSet(ActivityFormDTO activity) {
        for (LockedPeriodDTO lock : activity.getLockedPeriods()) {
            if (lock.isEnabled()) {
                if (lock.getParentType().equals(ProjectDTO.ENTITY_NAME)) {
                    projectLocks.put(lock.getParentId(), lock);
                } else {
                    activityLocks.put(activity.getId(), lock);
                }
            }
        }
    }

    public LockedPeriodSet(ActivityDTO activity) {
        indexLocks(activity.getDatabase());
    }


    private void indexLocks(UserDatabaseDTO db) {
        for (ActivityDTO activity : db.getActivities()) {
            addEnabled(activityLocks, activity.getId(), db.getLockedPeriods());
            addEnabled(activityLocks, activity.getId(), activity.getLockedPeriods());
        }
        for (ProjectDTO project : db.getProjects()) {
            addEnabled(projectLocks, project.getId(), project.getLockedPeriods());
        }
    }

    private void addEnabled(Multimap<Integer, LockedPeriodDTO> map, int key, Iterable<LockedPeriodDTO> periods) {
        for (LockedPeriodDTO lock : periods) {
            if (lock.isEnabled()) {
                map.put(key, lock);
            }
        }
    }

    public boolean isLocked(SiteDTO site) {
        if (isActivityLocked(site.getActivityId(), site.getDate2())) {
            return true;
        }
        if (site.getProject() != null) {
            if (dateRangeLocked(site.getDate2(), projectLocks.get(site.getProject().getId()))) {
                return true;
            }
        }
        return false;
    }

    public boolean isActivityLocked(int activityId, LocalDate date) {
        return dateRangeLocked(date, activityLocks.get(activityId));
    }

    public boolean isActivityLocked(int activityId, Date date) {
        return isActivityLocked(activityId, new LocalDate(date));
    }

    public boolean isProjectLocked(int projectId, LocalDate date) {
        return dateRangeLocked(date, projectLocks.get(projectId));
    }

    public boolean isProjectLocked(int projectId, Date date) {
        return isProjectLocked(projectId, new LocalDate(date));
    }

    private boolean dateRangeLocked(LocalDate date, Collection<LockedPeriodDTO> locks) {

        for (LockedPeriodDTO lock : locks) {
            if (lock.fallsWithinPeriod(date)) {
                return true;
            }
        }
        return false;
    }
}