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package info.kwarc.sally4.servlet.impl;

import info.kwarc.sally4.components.TemplatingComponent;
import info.kwarc.sally4.processors.FileServeProcessor;

import org.apache.camel.CamelContext;
import org.apache.camel.Component;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.freemarker.FreemarkerComponent;

public class ServletController {
	CamelContext context;
	ClassLoader loader;
	boolean debugTemplating;
	String debugTemplatingPath;

	public ServletController(CamelContext context, ClassLoader loader) {
		this.context = context;
		this.loader = loader;
		debugTemplating = false;
		debugTemplatingPath="";
	}
	
	public ServletController setDebugTemplating(boolean debugTemplating) {
		this.debugTemplating = debugTemplating;
		return this;
	}

	public String tpl(String fileName) {
		return "templatingComponent:"+debugTemplatingPath+fileName;
	}

	static String makeSureEndsInSlash(String s) {
		if (s.charAt(s.length()-1) == '/') {
			return s;
		} else {
			return s+"/";
		}
	}

	static String makeSureStartsInSlash(String s) {
		if (s.charAt(0) == '/') {
			return s;
		} else {
			return "/"+s;
		}
	}

	void replaceTemplatingComponent(Component comp) {
		if (context.getComponent("templatingComponent") != null) {
			context.removeComponent("templatingComponent");
		}
		context.addComponent("templatingComponent", comp);			
	}
	
	public ServletController initDebugTemplating(String fullPath) {
		if (debugTemplating) {
			fullPath = makeSureEndsInSlash(fullPath);
			debugTemplatingPath = "file://"+fullPath;
			replaceTemplatingComponent(new FreemarkerComponent());
		}
		return this;
	}

	public ServletController initTemplating(String jarPath) {
		jarPath = makeSureEndsInSlash(jarPath);
		if (!debugTemplating || context.getComponent("templatingComponent")==null) {
			replaceTemplatingComponent(new TemplatingComponent(jarPath, loader));
		}
		return this;
	}

	public ServletController serveStaticFiles(String servletPath, final String jarPath) {
		final String _servletPath = makeSureStartsInSlash(servletPath);
		try {
			context.addRoutes(new RouteBuilder() {
				@Override
				public void configure() throws Exception {
					from("sallyservlet://"+_servletPath+"?matchOnUriPrefix=true")
					.process(new FileServeProcessor(jarPath, loader));
				}
			});
		} catch (Exception e) {
			e.printStackTrace();
		}
		return this;
	}


}