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package liquibase.structure.core;

import liquibase.parser.core.ParsedNode;
import liquibase.parser.core.ParsedNodeException;
import liquibase.resource.ResourceAccessor;
import liquibase.structure.AbstractDatabaseObject;
import liquibase.structure.DatabaseObject;
import liquibase.util.StringUtil;

import java.util.*;

public class Index extends AbstractDatabaseObject {

	/** Marks Index as associated with Primary Key [PK] */
    public static final String MARK_PRIMARY_KEY = "primaryKey";
	/** Marks Index as associated with Foreign Key [FK] */
    public static final String MARK_FOREIGN_KEY = "foreignKey";
	/** Marks Index as associated with Unique Constraint [UC] */
    public static final String MARK_UNIQUE_CONSTRAINT = "uniqueConstraint";

    public Index() {
        setAttribute("columns", new ArrayList());
        setAttribute("associatedWith", new HashSet());
    }

    public Index(String indexName) {
        this();
        setName(indexName);
    }

    public Index(String indexName, String catalogName, String schemaName, String tableName, Column... columns) {
        this();
        setName(indexName);
        if (tableName != null) {
            setRelation(new Table(catalogName, schemaName, tableName));
            if ((columns != null) && (columns.length > 0)) {
                setColumns(Arrays.asList(columns));
            }
        }
    }

    @Override
    public DatabaseObject[] getContainingObjects() {
        return new DatabaseObject[] {
        		getRelation()
        };
    }

    @Override
    public String getName() {
        return getAttribute("name", String.class);
    }

    @Override
    public Index setName(String name) {
        this.setAttribute("name", name);
        return this;
    }

    @Override
    public Schema getSchema() {
        if (getRelation() == null) {
            return null;
        }
        
        return getRelation().getSchema();
    }

    /**
     * @deprecated Use {@link #getRelation()}
     */
    @Deprecated
	public Table getTable() {
		Relation relation = getRelation();
		if (relation instanceof Table)
		return (Table) relation;
	else
		return null;
	}

    /**
     * @deprecated Use {@link #setRelation(Relation)}
     */
    @Deprecated
	public Index setTable(Relation table) {
        return setRelation(table);
    }

    public Relation getRelation() {
    	return getAttribute("table", Relation.class);
    }

    public Index setRelation(Relation relation) {
    	this.setAttribute("table", relation);
        return this;
    }

	public String getTablespace() {
		return getAttribute("tablespace", String.class);
	}

	public Index setTablespace(String tablespace) {
        this.setAttribute("tablespace", tablespace);
        return this;
	}

    public List getColumns() {
        return getAttribute("columns", List.class);
    }
    
    public List getIncludedColumns() {
    	List toRet =  getAttribute("includedColumns", List.class);
    	return (toRet==null)?Collections.EMPTY_LIST:toRet;
    }

    public Index addColumn(Column column) {
    	column.setRelation(getRelation());
        getColumns().add(column);
        
        return this;
    }

    public Index setColumns(List columns) {
        if (getAttribute("table", Object.class) instanceof Table) {
            for (Column column :columns) {
                column.setRelation(getRelation());
            }
        }
        setAttribute("columns", columns);
        return this;
    }

    public String getColumnNames() {
        return StringUtil.join(getColumns(), ", ", new StringUtil.ToStringFormatter());
    }

    public Index setUnique(Boolean value) {
        this.setAttribute("unique", value);
        return this;
    }

    public Boolean isUnique() {
        return getAttribute("unique", Boolean.class);
    }

	public Set getAssociatedWith() {
		return getAttribute("associatedWith", Set.class);
	}

	public String getAssociatedWithAsString() {
		return StringUtil.join(getAssociatedWith(), ",");
	}

	public void addAssociatedWith(String item) {
		getAssociatedWith().add(item);
	}

	public boolean isAssociatedWith(String keyword) {
		return getAssociatedWith().contains(keyword);
	}

    @Override
    public Object getSerializableFieldValue(String field) {
        //
        // For columns within an Index, we now represent
        // all the columns as actual Column objects with
        // the forIndex flag set
        //
        if (field != null && field.equals("columns")) {
            List