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/*
 * Copyright 2009-2014 PrimeTek.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.primefaces.component.subtable;

import java.io.IOException;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.primefaces.component.column.Column;
import org.primefaces.component.columngroup.ColumnGroup;
import org.primefaces.component.datatable.DataTable;
import org.primefaces.component.row.Row;
import org.primefaces.renderkit.CoreRenderer;

public class SubTableRenderer extends CoreRenderer {

	@Override
	public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
		SubTable table = (SubTable) component;
		int rowCount = table.getRowCount();

		encodeHeader(context, table);

		for (int i = 0; i < rowCount; i++) {
            encodeRow(context, table, i);
		}

		encodeFooter(context, table);
	}

	public void encodeHeader(FacesContext context, SubTable table) throws IOException {
		ResponseWriter writer = context.getResponseWriter();
		UIComponent header = table.getFacet("header");

		if (header != null) {
			writer.startElement("tr", null);
			writer.writeAttribute("class", "ui-widget-header", null);

			writer.startElement("td", null);
			writer.writeAttribute("class", DataTable.SUBTABLE_HEADER, null);
			writer.writeAttribute("colspan", table.getColumns().size(), null);

			header.encodeAll(context);

			writer.endElement("td");
			writer.endElement("tr");
		}

		ColumnGroup group = table.getColumnGroup("header");
		if (group != null && group.isRendered()) {
			for (UIComponent child : group.getChildren()) {
				if (child.isRendered() && child instanceof Row) {
					Row headerRow = (Row) child;

					writer.startElement("tr", null);
					writer.writeAttribute("class", "ui-widget-header", null);

					for (UIComponent headerRowChild : headerRow.getChildren()) {
						if (headerRowChild.isRendered() && headerRowChild instanceof Column) {
							Column footerColumn = (Column) headerRowChild;
                            encodeFacetColumn(context, table, footerColumn, "header", DataTable.COLUMN_HEADER_CLASS, footerColumn.getHeaderText());
						}
					}

					writer.endElement("tr");
				}
			}
		}
	}

	public void encodeRow(FacesContext context, SubTable table, int rowIndex) throws IOException {
		table.setRowIndex(rowIndex);
		if (!table.isRowAvailable()) {
			return;
		}

		ResponseWriter writer = context.getResponseWriter();
		String clientId = table.getClientId(context);

		writer.startElement("tr", null);
		writer.writeAttribute("id", clientId + "_row_" + rowIndex, null);
		writer.writeAttribute("class", DataTable.ROW_CLASS, null);

		for (Column column : table.getColumns()) {
			String style = column.getStyle();
			String styleClass = column.getStyleClass();

			writer.startElement("td", null);
			if (style != null) writer.writeAttribute("style", style, null);
			if (styleClass != null) writer.writeAttribute("class", styleClass, null);

			column.encodeAll(context);

			writer.endElement("td");
		}

		writer.endElement("tr");
	}

	public void encodeFooter(FacesContext context, SubTable table) throws IOException {
		ResponseWriter writer = context.getResponseWriter();
		UIComponent footer = table.getFacet("footer");

		if (footer != null) {
			writer.startElement("tr", null);
			writer.writeAttribute("class", "ui-widget-header", null);

			writer.startElement("td", null);
			writer.writeAttribute("class", DataTable.SUBTABLE_FOOTER, null);
			writer.writeAttribute("colspan", table.getColumns().size(), null);

			footer.encodeAll(context);

			writer.endElement("td");
			writer.endElement("tr");
		}

		ColumnGroup group = table.getColumnGroup("footer");

		if (group == null || !group.isRendered())
			return;

		for (UIComponent child : group.getChildren()) {
			if (child.isRendered() && child instanceof Row) {
				Row footerRow = (Row) child;

				writer.startElement("tr", null);
				writer.writeAttribute("class", "ui-widget-header", null);

				for (UIComponent footerRowChild : footerRow.getChildren()) {
					if (footerRowChild.isRendered() && footerRowChild instanceof Column) {
                        Column footerColumn = (Column) footerRowChild;
                        encodeFacetColumn(context, table, footerColumn, "footer", DataTable.COLUMN_FOOTER_CLASS, footerColumn.getFooterText());
					}
				}

				writer.endElement("tr");
			}
		}
	}
    
    protected void encodeFacetColumn(FacesContext context, SubTable table, Column column, String facetName, String styleClass, String text) throws IOException {
        if (!column.isRendered()) {
			return;
		}

		ResponseWriter writer = context.getResponseWriter();
		String style = column.getStyle();
		String columnClass = column.getStyleClass();
		columnClass = (columnClass == null) ? styleClass : styleClass + " " + columnClass;

		writer.startElement("td", null);
		writer.writeAttribute("class", columnClass, null);
		if (column.getRowspan() != 1) writer.writeAttribute("rowspan", column.getRowspan(), null);
		if (column.getColspan() != 1) writer.writeAttribute("colspan", column.getColspan(), null);
		if (style != null) writer.writeAttribute("style", style, null);

		// Footer content
		UIComponent facet = column.getFacet(facetName);
		if (facet != null) {
			facet.encodeAll(context);
		} else if (text != null) {
			writer.write(text);
		}

		writer.endElement("td");
    }

	@Override
	public void encodeChildren(FacesContext context, UIComponent component) throws IOException {
		// Rendering happens on encodeEnd
	}

	@Override
	public boolean getRendersChildren() {
		return true;
	}
}