package com.onaro.sanscreen.client.view.actions.application;

import org.apache.commons.lang3.StringUtils;

import com.onaro.sanscreen.server.interfaces.data.inventory.BusinessEntity;

/**
 * Level of the BE.  Coincides with depth in tree.
 */
public enum BusinessEntityLevel {
    ROOT, TENANT, LOB, BU, PROJECT;

    public static String getValueAtLevel(BusinessEntity be, BusinessEntityLevel level) {
        String value = null;

        if(be != null) {
            switch (level) {
                case TENANT:
                    value = be.getTenant();
                    break;
                case LOB:
                    value = be.getLineOfBusiness();
                    break;
                case BU:
                    value = be.getBusinessUnit();
                    break;
                case PROJECT:
                    value = be.getProject();
                    break;
            }
        }
        return (value);
    }

    public static String getValueAtLevel(com.onaro.sanscreen.server.dataobject.historyobject.application.BusinessEntity be, BusinessEntityLevel level) {
        String value = null;

        if(be != null) {
            switch (level) {
                case TENANT:
                    value = be.getTenant();
                    break;
                case LOB:
                    value = be.getLineOfBusiness();
                    break;
                case BU:
                    value = be.getBusinessUnit();
                    break;
                case PROJECT:
                    value = be.getProject();
                    break;
            }
        }
        return (value);
    }

    public static String getPrefixForLevel(BusinessEntityLevel level) {
        String prefix = null;
        
        switch (level) {
            case TENANT:
                prefix = Messages.INSTANCE.getTenantPrefix();
                break;
            case LOB:
                prefix = Messages.INSTANCE.getLineOfBusinessPrefix();
                break;
            case BU:
                prefix = Messages.INSTANCE.getBusinessUnitPrefix();
                break;
            case PROJECT:
                prefix = Messages.INSTANCE.getProjectPrefix();
                break;
        }
        return (prefix);
    }

    /**
     * Copies the value at the given level of a BE from the srcBE to the destBE.
     * 
     * @param destBE destination BE
     * @param srcBE source BE
     * @param level which level of the BE to copy.
     */
    public static void setValueAtLevel(BusinessEntity destBE, BusinessEntity srcBE, BusinessEntityLevel level) {
        setValueAtLevel(destBE, level, getValueAtLevel(srcBE, level));
    }

    /**
     * Copies the value at the given level of a BE to the given value.
     * 
     * @param be destination BE
     * @param level which level of the BE to copy.
     * @param value the value to copy
     */
    public static void setValueAtLevel(BusinessEntity be, BusinessEntityLevel level, String value) {
        switch (level) {
            case TENANT:
                be.setTenant(value);
                break;
            case LOB:
                be.setLineOfBusiness(value);
                break;
            case BU:
                be.setBusinessUnit(value);
                break;
            case PROJECT:
                be.setProject(value);
                break;
        }
    }

    /**
     * 
     * @param level
     *            the level to test
     * @return the previous level or the top most level if the level is already the top most.
     */
    public static BusinessEntityLevel getPreviousLevel(BusinessEntityLevel level) {
        if (level == TENANT) {
            return (TENANT);
        }
        return (values()[level.ordinal() - 1]);
    }

    /**
     * 
     * @param level
     *            the level to test
     * @return the next level or the last level if the level is already the last level.
     */
    public static BusinessEntityLevel getNextLevel(BusinessEntityLevel level) {
        if (level == PROJECT) {
            return (PROJECT);
        }
        return (values()[level.ordinal() + 1]);
    }

    /**
     * @param be
     *            the BusinessEntity to test
     * @param level
     *            the level to test
     * @return true if this level is empty and all child levels are empty.
     */
    public static boolean isEmptyLevelPath(BusinessEntity be, BusinessEntityLevel level) {
        while (level != PROJECT) {
            if (StringUtils.isNotEmpty(getValueAtLevel(be, level))) {
                return (false);
            }
            level = getNextLevel(level);
        }
        return (StringUtils.isEmpty(getValueAtLevel(be, level)));
    }
}