package pt.ist.renderers.extensions.components;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import javax.servlet.ServletContext;
import javax.servlet.jsp.PageContext;

import org.apache.log4j.Logger;

import pt.ist.renderers.components.HtmlLink;
import pt.ist.renderers.components.HtmlScript;
import pt.ist.renderers.components.HtmlTextArea;
import pt.ist.renderers.components.tags.HtmlTag;
import pt.utl.ist.fenix.tools.util.i18n.Language;

public class TinyMceEditor extends HtmlTextArea {

    private static final Logger logger = Logger.getLogger(TinyMceEditor.class);

    public static final String EDITOR_PATH = "/javaScript/tiny_mce/";
    public static final String CODE_PATH = "/javaScript/tiny_mce/tiny_mce.js";
    public static final String CONFIG_PATH = "/javaScript/tiny_mce/config/";

    private String config;
    private Integer width;
    private Integer height;

    public String getConfig() {
	return this.config;
    }

    public void setConfig(String config) {
	this.config = config;
    }

    public Integer getHeight() {
	return this.height;
    }

    public void setHeight(Integer height) {
	this.height = height;
    }

    public Integer getWidth() {
	return this.width;
    }

    public void setWidth(Integer width) {
	this.width = width;
    }

    public TinyMceEditor() {
	super();
    }

    public TinyMceEditor(String config) {
	this();

	this.config = config;
    }

    @Override
    public HtmlTag getOwnTag(PageContext context) {
	HtmlTag parentTag = new HtmlTag(null);

	HtmlLink link = new HtmlLink();
	link.setModuleRelative(false);
	link.setContextRelative(true);

	link.setUrl(TinyMceEditor.CODE_PATH);
	HtmlScript sourceScript = new HtmlScript("text/javascript", link.calculateUrl(), true);
	parentTag.addChild(sourceScript.getOwnTag(context));

	HtmlScript script = new HtmlScript();
	script.setContentType("text/javascript");
	script.setScript(generateScript(context));
	parentTag.addChild(script.getOwnTag(context));

	HtmlTag tag = super.getOwnTag(context);
	parentTag.addChild(tag);

	return parentTag;
    }

    private CharSequence generateScript(PageContext context) {
	StringBuilder builder = new StringBuilder();

	Properties properties = new Properties();

	if (getHeight() != null) {
	    properties.setProperty("height", getHeight().toString());
	}

	if (getWidth() != null) {
	    properties.setProperty("width", getWidth().toString());
	}

	loadConfig(context, properties);

	properties.setProperty("mode", "exact");
	properties.setProperty("elements", getId());
	properties.setProperty("relative_urls", "false");
	properties.setProperty("remove_script_host", "false");
	properties.setProperty("convert_fonts_to_spans", "true");
	properties.setProperty("fix_list_elements", "true");

	Language language = Language.getLanguage();
	properties.setProperty("language", language.toString());
	properties.setProperty("docs_language", "en"); // hardcoded because pt
						       // is not supported

	builder.append("tinyMCE.init({\n");

	int index = 1;
	for (Object key : properties.keySet()) {
	    Object value = properties.getProperty((String) key);

	    if (value.equals("true") || value.equals("false")) {
		builder.append(String.valueOf(key) + ": " + value);
	    } else if (((String) value).matches("\\p{Digit}+")) {
		builder.append(String.valueOf(key) + ": " + value);
	    } else {
		builder.append(String.valueOf(key) + ": '" + value + "'");
	    }

	    if (index < properties.size()) {
		builder.append(",\n");
	    }

	    index++;
	}

	builder.append("\n});");

	return builder;
    }

    private void loadConfig(PageContext context, Properties properties) {
	String config = getConfig();

	if (config == null) {
	    return;
	}

	try {
	    ServletContext servletContext = context.getServletContext();
	    InputStream stream = servletContext.getResourceAsStream(CONFIG_PATH + getConfig() + ".properties");

	    if (stream == null) {
		logger.warn("could not read TinyMCE configuration named '" + getConfig() + "'");
	    } else {
		properties.load(stream);
	    }
	} catch (IOException e) {
	    logger.warn("exception thrown when reading TinyMCE configuration '" + getConfig() + "'" + e);
	    e.printStackTrace();
	}
    }

    public void disable() {
	setClasses("mceNoEditor");
    }

}