package sandcrawler

import cascading.flow.FlowDef
import cascading.pipe.Pipe
import cascading.tuple.Fields
import com.twitter.scalding._
import com.twitter.scalding.typed.TDsl._
import parallelai.spyglass.hbase.HBaseConstants.SourceMode
import parallelai.spyglass.hbase.HBasePipeConversions
import parallelai.spyglass.hbase.HBaseSource
import TDsl._
import scala.util.parsing.json.JSONObject

import java.text.Normalizer
import java.util.Arrays
import java.util.Properties
import java.util.regex.Pattern

import scala.math
import scala.util.parsing.json.JSON

import cascading.tuple.Fields
import com.twitter.scalding._
import com.twitter.scalding.typed.CoGrouped
import com.twitter.scalding.typed.Grouped
import com.twitter.scalding.typed.TDsl._
import org.apache.hadoop.hbase.io.ImmutableBytesWritable
import org.apache.hadoop.hbase.util.Bytes
import parallelai.spyglass.base.JobBase
import parallelai.spyglass.hbase.HBaseConstants.SourceMode
import parallelai.spyglass.hbase.HBasePipeConversions
import parallelai.spyglass.hbase.HBaseSource

class CrossrefScorable extends Scorable with HBasePipeConversions {
  // TODO: Generalize args so there can be multiple Crossref pipes in one job.
  def getSource(args : Args) : Source = {
    TextLine(args("crossref-input"))
  }

  def getFeaturesPipe(args : Args)(implicit mode : Mode, flowDef : FlowDef) : TypedPipe[MapFeatures] = {
    getSource(args).read
      .toTypedPipe[String](new Fields("line"))
      .map{ json : String => 
        CrossrefScorable.simplifyJson(json) match {
          case None => new MapFeatures(Scorable.NoSlug, json)
          case Some(map) => new MapFeatures(
            Scorable.titleToSlug(map("title").asInstanceOf[String]), 
            JSONObject(map).toString)
        }
      }
  }

  object CrossrefScorable {
    def simplifyJson(json : String) : Option[Map[String, Any]] = {
      Scorable.jsonToMap(json) match {
        case None => None
        case Some(map) => {
          if (map contains "title") {
            val titles = map("title").asInstanceOf[List[String]]
            if (titles.isEmpty) {
              None
            } else {
              Some(Map("title" -> titles(0)))
            }
          } else {
            None
          }
        }
      }
    }
  }
}