package org.sonatype.sitebricks;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import javax.inject.Inject;

import org.mvel2.MVEL;
import org.sonatype.addressbook.AddressBook;
import org.sonatype.sitebricks.form.FormDefinitionGenerator;

import com.google.inject.name.Named;
import com.google.sitebricks.At;
import com.google.sitebricks.client.transport.Json;
import com.google.sitebricks.headless.Reply;
import com.google.sitebricks.headless.Request;
import com.google.sitebricks.headless.Service;
import com.google.sitebricks.http.Delete;
import com.google.sitebricks.http.Get;
import com.google.sitebricks.http.Post;
import com.google.sitebricks.http.Put;

// ------------------------------
// Method   URL        Action
// ------------------------------
// POST     /users     create
// GET      /users     read
// PUT      /users/23  update
// DESTROY  /users/23  delete

@At( "/json" )
@Service
public class EntityService
{
    @Inject
    ApplicationMapping mapping;

    @Inject
    FormDefinitionGenerator formDefinitionGenerator;

    @Inject
    AddressBook application;

    @At( "/:type" )
    @Post
    public Reply<?> post( Request request, @Named( "type" ) String type )
    {
        System.out.println( "POST" );
        Object entity = request.read( mapping.getType() ).as( Json.class );
        Map<String, Object> m = new HashMap<String, Object>();
        m.put( "entity", entity );
        MVEL.eval( mapping.getCreate(), application, m );
        // return Reply.with( "{ 'success': true} " );
        return Reply.with( "OK" );
    }

    @At( "/:type" )
    @Get
    public Reply<?> get( @Named( "type" ) String type )
    {
        System.out.println( "GET/collection" );
        Collection<Object> collection = (Collection<Object>) MVEL.eval( mapping.getReadCollection(), application );
        return Reply.with( collection ).type( "application/json" ).as( Json.class );
    }

    @At( "/type:/:id" )
    @Get
    public Reply<?> get( @Named( "type" ) String type, @Named( "id" ) String id )
    {
        System.out.println( "GET/id" );
        Map m = new HashMap();
        m.put( "id", id );
        return Reply.with( MVEL.eval( mapping.getRead(), application, m ) ).type( "application/json" ).as( Json.class );
    }

    @At( "/:type/:id" )
    @Put
    public Reply<String> put( Request request, @Named( "type" ) String type, @Named( "id" ) String id )
    {
        System.out.println( "PUT" );
        Object entity = request.read( mapping.getType() ).as( Json.class );
        System.out.println( entity );
        Map<String, Object> m = new HashMap<String, Object>();
        m.put( "entity", entity );
        MVEL.eval( mapping.getUpdate(), application, m );
        return Reply.with( "OK" );
    }

    @At( "/:type/:id" )
    @Delete
    public Reply<String> delete( @Named( "type" ) String type, @Named( "id" ) String id )
    {
        System.out.println( "DELETE" );
        System.out.println( "we are attempting to delete record: " + id );
        //
        // With ExtJs the store will have been updated to remove the record so we just need to run
        // to perform the delete operation.
        //
        Map m = new HashMap();
        m.put( "id", id );
        MVEL.eval( mapping.getDelete(), application, m );

        return Reply.with( "{'success': true }" );
    }
}