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/*
 * Copyright 2009-2013 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.schedule;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Iterator;
import java.util.Map;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;

import org.primefaces.model.LazyScheduleModel;
import org.primefaces.model.ScheduleEvent;
import org.primefaces.model.ScheduleModel;
import org.primefaces.renderkit.CoreRenderer;
import org.primefaces.util.WidgetBuilder;

public class ScheduleRenderer extends CoreRenderer {

    @Override
	public void decode(FacesContext context, UIComponent component) {
        decodeBehaviors(context, component);
	}

    @Override
	public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
		Schedule schedule = (Schedule) component;

        if(context.getExternalContext().getRequestParameterMap().containsKey(schedule.getClientId(context))) {
            encodeEvents(context, schedule);
        } 
        else {
            encodeMarkup(context, schedule);
            encodeScript(context, schedule);
        }
	}
	
	protected void encodeEvents(FacesContext context, Schedule schedule) throws IOException {
		String clientId = schedule.getClientId(context);
		ScheduleModel model = (ScheduleModel) schedule.getValue();
		Map params = context.getExternalContext().getRequestParameterMap();
		
        if(model instanceof LazyScheduleModel) {
            String startDateParam = params.get(clientId + "_start");
            String endDateParam = params.get(clientId + "_end");

            Date startDate = new Date(Long.valueOf(startDateParam));
            Date endDate = new Date(Long.valueOf(endDateParam));

            LazyScheduleModel lazyModel = ((LazyScheduleModel) model);
            lazyModel.clear();							//Clear old events
            lazyModel.loadEvents(startDate, endDate);	//Lazy load events
        }
		
		encodeEventsAsJSON(context, schedule, model);
	}
	
	protected void encodeEventsAsJSON(FacesContext context, Schedule schedule, ScheduleModel model) throws IOException {
		ResponseWriter writer = context.getResponseWriter();
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeZone(schedule.calculateTimeZone());

        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSSSS'Z'");
        writer.write("{");
        writer.write("\"events\" : [");
		
        if(model != null) {
            for(Iterator iterator = model.getEvents().iterator(); iterator.hasNext();) {
                ScheduleEvent event = iterator.next();
                calendar.setTime(event.getStartDate());
                String startDateInMillis = df.format(calendar.getTime());
                
                calendar.setTime(event.getEndDate());
                String endDateInMillis = df.format(calendar.getTimeInMillis());

                writer.write("{");
                writer.write("\"id\": \"" + event.getId() + "\"");	
                writer.write(",\"title\": \"" + escapeText(event.getTitle()) + "\"");
                writer.write(",\"start\": \"" + startDateInMillis + "\"");	
                writer.write(",\"end\": \"" + endDateInMillis + "\"");	
                writer.write(",\"allDay\":" + event.isAllDay());
                writer.write(",\"editable\":" + event.isEditable());
                if(event.getStyleClass() != null)
                    writer.write(",\"className\":\"" + event.getStyleClass() + "\"");

                writer.write("}");

                if(iterator.hasNext())
                    writer.write(",");
            }
        }
		
		writer.write("]}");	
	}

	protected void encodeScript(FacesContext context, Schedule schedule) throws IOException {
		String clientId = schedule.getClientId(context);
        WidgetBuilder wb = getWidgetBuilder(context);
        wb.initWithDomReady("Schedule", schedule.resolveWidgetVar(), clientId, "schedule")
            .attr("defaultView", schedule.getView())
            .attr("locale", schedule.calculateLocale(context).toString())
            .attr("offset", schedule.calculateTimeZone().getRawOffset());
        
        if(schedule.getInitialDate() != null) {
			Calendar c = Calendar.getInstance();
			c.setTime((Date) schedule.getInitialDate());
            
            wb.attr("year", c.get(Calendar.YEAR)).attr("month", c.get(Calendar.MONTH)).attr("date", c.get(Calendar.DATE));
		}
        
        if(schedule.isShowHeader()) {
            wb.append(",header:{left:'")
                .append(schedule.getLeftHeaderTemplate()).append("'")
                .attr("center", schedule.getCenterHeaderTemplate())
                .attr("right", schedule.getRightHeaderTemplate())
                .append("}");
		} 
        else {
            wb.attr("header", false);
		}
        
        wb.attr("allDaySlot", schedule.isAllDaySlot(), true)
            .attr("slotMinutes", schedule.getSlotMinutes(), 30)
            .attr("firstHour", schedule.getFirstHour(), 6)
            .attr("minTime", schedule.getMinTime(), null)
            .attr("maxTime", schedule.getMaxTime(), null)
            .attr("aspectRatio", schedule.getAspectRatio(), Double.MIN_VALUE)
            .attr("weekends", schedule.isShowWeekends(), true)
            .attr("disableDragging", !schedule.isDraggable(), false)
            .attr("disableResizing", !schedule.isResizable(), false)
            .attr("axisFormat", schedule.getAxisFormat(), null)
            .attr("timeFormat", schedule.getTimeFormat(), null)
            .attr("columnFormat", schedule.getColumnFormat(), null);
        
        encodeClientBehaviors(context, schedule);

        wb.finish();	
	}

	protected void encodeMarkup(FacesContext context, Schedule schedule) throws IOException {
		ResponseWriter writer = context.getResponseWriter();
		String clientId = schedule.getClientId(context);

		writer.startElement("div", null);
		writer.writeAttribute("id", clientId, null);
		if(schedule.getStyle() != null) writer.writeAttribute("style", schedule.getStyle(), "style");
		if(schedule.getStyleClass() != null) writer.writeAttribute("class", schedule.getStyleClass(), "style");
		
		writer.startElement("div", null);
		writer.writeAttribute("id", clientId + "_container", null);
		writer.endElement("div");
		
		writer.endElement("div");
	}
	
    @Override
	public void encodeChildren(FacesContext context, UIComponent component) throws IOException {
		//Do nothing
	}

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




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