package org.msh.tb.entities;

import org.hibernate.annotations.Index;
import org.hibernate.annotations.OrderBy;
import org.hibernate.annotations.Table;
import org.msh.etbm.commons.transactionlog.Operation;
import org.msh.etbm.commons.transactionlog.mapping.PropertyLog;

import javax.persistence.*;
import java.util.ArrayList;
import java.util.List;


@Entity
@javax.persistence.Table(name = "administrativeunit")
@Table(appliesTo = "administrativeunit", indexes = {@Index( name = "idxcode", columnNames = {"code"} ) })
public class AdministrativeUnit extends WSObject implements SyncKey{
    private static final long serialVersionUID = 7777075173601864769L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Integer id;

    @Embedded
    @PropertyLog(messageKey="form.name", operations={Operation.NEW, Operation.DELETE})
    private LocalizedNameComp name = new LocalizedNameComp();

    @ManyToOne
    @JoinColumn(name="PARENT_ID")
    @PropertyLog(operations={Operation.NEW, Operation.DELETE})
    private AdministrativeUnit parent;

    @OneToMany(mappedBy="parent",fetch=FetchType.LAZY)
    @OrderBy(clause="NAME1")
    private List<AdministrativeUnit> units = new ArrayList<AdministrativeUnit>();

    @Column(length=50)
    @PropertyLog(messageKey="global.legacyId")
    private String legacyId;

    // properties to help dealing with trees
    private int unitsCount;

    @Column(length=15, nullable=false)
    @PropertyLog(ignore=true)
    private String code;

    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="COUNTRYSTRUCTURE_ID")
    @PropertyLog(operations={Operation.ALL})
    private CountryStructure countryStructure;

    @Transient
    // Ricardo: TEMPORARY UNTIL A SOLUTION IS FOUND. Just to attend a request from the XML data model to
    // map an XML node to a property in the model
    private Integer clientId;

    /**
     * Return the parent list including the own object
     * @return List of {@link AdministrativeUnit} instance
     */
    public List<AdministrativeUnit> getParents() {
        return getParentsTreeList(true);
    }


    /**
     * Return the display name of the administrative unit concatenated with its parent units
     * @return
     */
    public String getFullDisplayName() {
        String s = getName().toString();

        for (AdministrativeUnit adm: getParentsTreeList(false)) {
            s += ", " + adm.getName().toString();
        }

        return s;
    }

    /**
     * Return the parent units display name with the name of this instance only on the end.
     * @return
     */
    public String getFullDisplayName2() {
        String s = null;

        for (AdministrativeUnit adm: getParentsTreeList(true)) {
            if(s == null)
                s = adm.getName().toString();
            else
                s += ", " + adm.getName().toString();
        }

        return s;
    }

    /**
     * Return a list with parents administrative unit, where the first is the upper level administrative unit and
     * the last the lowest level
     * @return {@link List} of {@link AdministrativeUnit} instances
     */
    public List<AdministrativeUnit> getParentsTreeList(boolean includeThis) {
        ArrayList<AdministrativeUnit> lst = new ArrayList<AdministrativeUnit>();

        AdministrativeUnit aux;
        if (includeThis)
            aux = this;
        else aux = getParent();

        while (aux != null) {
            lst.add(0, aux);
            aux = aux.getParent();
        }
        return lst;
    }


    /**
     * Static method that return the parent code of a given code
     * @param code
     * @return
     */
    public static String getParentCode(String code) {
        if ((code == null) || (code.length() <= 3))
            return null;

        if (code.length() <= 6)
            return code.substring(0, 3);
        if (code.length() <= 9)
            return code.substring(0, 6);
        if (code.length() <= 12)
            return code.substring(0, 9);
        return code.substring(0, 12);
    }

    /**
     * Check if an administrative unit code (passed as the code parameter) is a child of the current administrative unit
     * @param code of the unit
     * @return true if code is of a child unit, otherwise return false
     */
    public boolean isSameOrChildCode(String code) {
        return isSameOrChildCode(this.code, code);
/*		int len = this.code.length();
		if (len > code.length())
			return false;
		return (this.code.equals(code.substring(0, this.code.length())));
*/	}


    /**
     * Static method to check if a code is equals of a child of the code given by the parentCode param
     * @param parentCode
     * @param code
     * @return
     */
    public static boolean isSameOrChildCode(String parentCode, String code) {
        int len = parentCode.length();
        if (len > code.length())
            return false;
        return (parentCode.equals(code.substring(0, parentCode.length())));
    }


    /**
     * Return the parent administrative unit based on its level. If level is the same of this unit, it returns itself.
     * If level is bigger than the level of this unit, it returns null
     * @param level
     * @return {@link AdministrativeUnit} instance, which is itself or a parent admin unit
     */
    public AdministrativeUnit getAdminUnitByLevel(int level) {
        if (level == countryStructure.getLevel())
            return this;
        List<AdministrativeUnit> lst = getParents();
        for (AdministrativeUnit adm: lst) {
            if (adm.getLevel()== level)
                return adm;
        }
        return null;
    }


    /**
     * Return parent administrative unit of level 1
     * @return {@link AdministrativeUnit} instance
     */
    public AdministrativeUnit getParentLevel1() {
        return getAdminUnitByLevel(1);
    }


    /**
     * Return parent administrative unit of level 2
     * @return {@link AdministrativeUnit} instance
     */
    public AdministrativeUnit getParentLevel2() {
        return getAdminUnitByLevel(2);
    }


    /**
     * Return parent administrative unit of level 3
     * @return {@link AdministrativeUnit} instance
     */
    public AdministrativeUnit getParentLevel3() {
        return getAdminUnitByLevel(3);
    }


    /**
     * Return parent administrative unit of level 4
     * @return {@link AdministrativeUnit} instance
     */
    public AdministrativeUnit getParentLevel4() {
        return getAdminUnitByLevel(4);
    }


    /**
     * Return parent administrative unit of level 5
     * @return {@link AdministrativeUnit} instance
     */
    public AdministrativeUnit getParentLevel5() {
        return getAdminUnitByLevel(5);
    }


    /**
     * @return the id
     */
    public Integer getId() {
        return id;
    }

    @Override
    public Integer getClientId() {
        return clientId;
    }

    @Override
    public void setClientId(Integer clientId) {
        this.clientId = clientId;
    }

    /**
     * @param id the id to set
     */
    public void setId(Integer id) {
        this.id = id;
    }

    /**
     * @return the name
     */
    public LocalizedNameComp getName() {
        return name;
    }

    /**
     * @param name the name to set
     */
    public void setName(LocalizedNameComp name) {
        this.name = name;
    }

    /**
     * @return the parent
     */
    public AdministrativeUnit getParent() {
        return parent;
    }

    /**
     * @param parent the parent to set
     */
    public void setParent(AdministrativeUnit parent) {
        this.parent = parent;
    }

    /**
     * @return the units
     */
    public List<AdministrativeUnit> getUnits() {
        return units;
    }

    /**
     * @param units the units to set
     */
    public void setUnits(List<AdministrativeUnit> units) {
        this.units = units;
    }

    /**
     * @return the legacyId
     */
    public String getLegacyId() {
        return legacyId;
    }

    /**
     * @param legacyId the legacyId to set
     */
    public void setLegacyId(String legacyCode) {
        this.legacyId = legacyCode;
    }

    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return getFullDisplayName();
    }

    /**
     * @return the unitsCount
     */
    public int getUnitsCount() {
        return unitsCount;
    }

    /**
     * @param unitsCount the unitsCount to set
     */
    public void setUnitsCount(int unitsCount) {
        this.unitsCount = unitsCount;
    }

    /* (non-Javadoc)
     * @see java.lang.Object#equals(java.lang.Object)
     */
    @Override
    public boolean equals(Object obj) {
        if (obj == this)
            return true;

        if (!(obj instanceof AdministrativeUnit))
            return false;

        return ((AdministrativeUnit)obj).getId().equals(getId());
    }

    /**
     * @return the countryStructure
     */
    public CountryStructure getCountryStructure() {
        return countryStructure;
    }

    /**
     * @param countryStructure the countryStructure to set
     */
    public void setCountryStructure(CountryStructure countryStructure) {
        this.countryStructure = countryStructure;
    }


    /**
     * @param code the code to set
     */
    public void setCode(String code) {
        this.code = code;
    }

    /**
     * @return the code
     */
    public String getCode() {
        return code;
    }

    public int getLevel() {
        String s = getCode();
        if (s == null)
            return 0;

        return s.length()/3;
    }
}