package com.onaro.sanscreen.client.view.tabular;

import java.text.MessageFormat;
import java.util.HashMap;
import java.util.Map;
import java.util.ResourceBundle;

import com.onaro.sanscreen.client.SANscreenClientPlugin;
import com.onaro.sanscreen.client.view.init.ConfigurableTableModelInitInfo;
import com.onaro.sanscreen.client.view.init.ConfigurableTableModelInitInfo.AnnotationColumnInitInfo;
import com.onaro.sanscreen.client.view.init.ConfigurableTableModelInitInfo.AnnotationContextColumnInitInfo;
import com.onaro.util.IllegalInitException;
import com.onaro.util.InvalidConfigException;
import com.onaro.util.enumeration.EnumPresentation;
import com.onaro.util.xml.XmlIterator;

/**
 * Creates configurable columns based on the requested column type.
 */
public class ColumnFactory {

	private static Map<String,ColumnFactoryWorker> typeToColumnFactoryWorker = new HashMap<String,ColumnFactoryWorker>();

	static {
		ColumnFactoryWorker basicColumnFactoryWorker = new ColumnFactoryWorker() {
			public ITabularColumn<Row> createColumn(String tableName, ConfigurableTableModelInitInfo.ColumnInitInfo columnInitInfo,
					ResourceBundle resources, EnumPresentation enumerations) throws IllegalInitException {
				return new BasicColumn(tableName, (ConfigurableTableModelInitInfo.BasicColumnInitInfo) columnInitInfo,
						resources, enumerations);
			}

			public ConfigurableTableModelInitInfo.ColumnInitInfo getColumnInitInfo(XmlIterator confItr) {
				return new ConfigurableTableModelInitInfo.BasicColumnInitInfo(confItr);
			}
		};
		ColumnFactoryWorker dateColumnFactoryWorker = new ColumnFactoryWorker() {
			public ITabularColumn<Row> createColumn(String tableName, ConfigurableTableModelInitInfo.ColumnInitInfo columnInitInfo,
					ResourceBundle resources, EnumPresentation enumerations) throws IllegalInitException {
				return new DateColumn(tableName, (ConfigurableTableModelInitInfo.DateColumnInitInfo) columnInitInfo,
						resources, enumerations);
			}

			public ConfigurableTableModelInitInfo.ColumnInitInfo getColumnInitInfo(XmlIterator confItr) {
				return new ConfigurableTableModelInitInfo.DateColumnInitInfo(confItr);
			}
		};
		ColumnFactoryWorker numberColumnFactoryWorker = new ColumnFactoryWorker() {
			public ITabularColumn<Row> createColumn(String tableName, ConfigurableTableModelInitInfo.ColumnInitInfo columnInitInfo,
					ResourceBundle resources, EnumPresentation enumerations) throws IllegalInitException {
				return new NumberColumn(tableName,
						(ConfigurableTableModelInitInfo.NumberColumnInitInfo) columnInitInfo, resources, enumerations);
			}

			public ConfigurableTableModelInitInfo.ColumnInitInfo getColumnInitInfo(XmlIterator confItr)
					throws InvalidConfigException {
				return new ConfigurableTableModelInitInfo.NumberColumnInitInfo(confItr);
			}
		};
		ColumnFactoryWorker contextColumnFactoryWorker = new ColumnFactoryWorker() {
			public ITabularColumn<Row> createColumn(String tableName, ConfigurableTableModelInitInfo.ColumnInitInfo columnInitInfo,
					ResourceBundle resources, EnumPresentation enumerations) throws IllegalInitException {
				return new ContextColumn(tableName,
						(ConfigurableTableModelInitInfo.ContextColumnInitInfo) columnInitInfo, resources);
			}

			public ConfigurableTableModelInitInfo.ColumnInitInfo getColumnInitInfo(XmlIterator confItr)
					throws InvalidConfigException {
				return new ConfigurableTableModelInitInfo.ContextColumnInitInfo(confItr);
			}
		};
		ColumnFactoryWorker htmlColumnFactoryWorker = new ColumnFactoryWorker() {
			public ITabularColumn<Row> createColumn(String tableName, ConfigurableTableModelInitInfo.ColumnInitInfo columnInitInfo,
					ResourceBundle resources, EnumPresentation enumerations) throws IllegalInitException {
				return new HtmlColumn(tableName, (ConfigurableTableModelInitInfo.HtmlColumnInitInfo) columnInitInfo,
						resources, enumerations);
			}

			public ConfigurableTableModelInitInfo.ColumnInitInfo getColumnInitInfo(XmlIterator confItr) {
				return new ConfigurableTableModelInitInfo.HtmlColumnInitInfo(confItr);
			}
		};
		ColumnFactoryWorker derivedColumnFactoryWorker = new ColumnFactoryWorker() {
			public ITabularColumn<Row> createColumn(String tableName, ConfigurableTableModelInitInfo.ColumnInitInfo columnInitInfo,
					ResourceBundle resources, EnumPresentation enumerations) throws IllegalInitException {
				return new DerivedNumberColumn(tableName,
						(ConfigurableTableModelInitInfo.NumberColumnInitInfo) columnInitInfo, resources, enumerations);
			}

			public ConfigurableTableModelInitInfo.ColumnInitInfo getColumnInitInfo(XmlIterator confItr)
					throws InvalidConfigException {
				return new ConfigurableTableModelInitInfo.NumberColumnInitInfo(confItr);
			}
		};
		ColumnFactoryWorker annotationsColumnFactoryWorker = new ColumnFactoryWorker() {
			public ITabularColumn<Row> createColumn(String tableName, ConfigurableTableModelInitInfo.ColumnInitInfo columnInitInfo,
					ResourceBundle resources, EnumPresentation enumerations) throws IllegalInitException {
				return new AnnotationColumn(tableName,
						(ConfigurableTableModelInitInfo.AnnotationColumnInitInfo) columnInitInfo);
			}

			public ConfigurableTableModelInitInfo.ColumnInitInfo getColumnInitInfo(XmlIterator confItr)
					throws InvalidConfigException {
				throw new UnsupportedOperationException();
			}
		};
		ColumnFactoryWorker annotationContextColumnFactoryWorker = new ColumnFactoryWorker() {
			public ITabularColumn<Row> createColumn(String tableName, ConfigurableTableModelInitInfo.ColumnInitInfo columnInitInfo,
					ResourceBundle resources, EnumPresentation enumerations) throws IllegalInitException {
				return new AnnotationContextColumn(tableName,
						(ConfigurableTableModelInitInfo.AnnotationContextColumnInitInfo) columnInitInfo, resources);
			}

			public ConfigurableTableModelInitInfo.ColumnInitInfo getColumnInitInfo(XmlIterator confItr)
					throws InvalidConfigException {
				return new ConfigurableTableModelInitInfo.AnnotationContextColumnInitInfo(confItr);
			}
		};

		put("column", basicColumnFactoryWorker); //$NON-NLS-1$
		put("row", basicColumnFactoryWorker); //$NON-NLS-1$
		put("datecolumn", dateColumnFactoryWorker); //$NON-NLS-1$
		put("numbercolumn", numberColumnFactoryWorker); //$NON-NLS-1$
		put("contextcolumn", contextColumnFactoryWorker); //$NON-NLS-1$
		put("htmlcolumn", htmlColumnFactoryWorker); //$NON-NLS-1$
		put("derivedcolumn", derivedColumnFactoryWorker); //$NON-NLS-1$
		put(AnnotationColumnInitInfo.COLUMN_TYPE, annotationsColumnFactoryWorker);
		put(AnnotationContextColumnInitInfo.COLUMN_TYPE, annotationContextColumnFactoryWorker);
		
	}

	private static void put(String type, ColumnFactoryWorker columnFactoryWorker) {
		typeToColumnFactoryWorker.put(type, columnFactoryWorker);
	}

	public static ConfigurableTableModelInitInfo.ColumnInitInfo getColumnInitInfo(String type, XmlIterator confItr)
			throws InvalidConfigException {
		ColumnFactoryWorker columnFactoryWorker = typeToColumnFactoryWorker.get(type);
		return columnFactoryWorker.getColumnInitInfo(confItr);
	}

	/**
	 * Creates a column of the given type for the given table.
	 * 
	 * @param tableName
	 *            the table the column belongs to
	 * @param resources
	 *            provides locale dependant resources
	 * 
	 */
	public static ITabularColumn<Row> createColumn(String tableName, ConfigurableTableModelInitInfo.ColumnInitInfo columnInitInfo,
			ResourceBundle resources) throws IllegalInitException {

		SANscreenClientPlugin clientPlugin = SANscreenClientPlugin.getDefault();
		EnumPresentation enumPresentation = clientPlugin.getEnumPresentation();

		
		String colType = columnInitInfo.getType();
		ColumnFactoryWorker columnFactoryWorker = typeToColumnFactoryWorker.get(colType);

		if (columnFactoryWorker == null) {
			String msgPattern = "Failed to find column type: {0} instantiator for: {0}"; //$NON-NLS-1$
			String msg = MessageFormat.format(msgPattern, colType, columnInitInfo.getClass().getName());
			throw new IllegalArgumentException(msg);
		}

		return columnFactoryWorker.createColumn(tableName, columnInitInfo, resources, enumPresentation);
	}

	private interface ColumnFactoryWorker {
		public ConfigurableTableModelInitInfo.ColumnInitInfo getColumnInitInfo(XmlIterator confItr)
				throws InvalidConfigException;

		public ITabularColumn<Row> createColumn(String tableName, ConfigurableTableModelInitInfo.ColumnInitInfo columnInitInfo,
				ResourceBundle resources, EnumPresentation enumerations) throws IllegalInitException;
	}
}