package main

import (
	"fmt"
	"log"

	"github.com/kr/pretty"
)

var xmldoc = `<?xml version="1.0"?>
<animals>
  <chimp name="aap">
    <food>banaan</food>
  </chimp>
  <cat name="mies">
    <food>ansjovis</food>
  </cat>
  <chimp name="aapje">
    <food>apenootjes</food>
  </chimp>
</animals>
`

func main() {
	doc, err := parse(xmldoc)
	if err != nil {
		log.Fatalln(err)
	}
	fmt.Println("\nGeparst XML-document:")
	pretty.Println(doc)

	fmt.Print(`
Query:
/animals/chimp[2]/food/text()
`)
	/*
	   SORT
	     COLLECT  'child' 'type' 'text' text
	       COLLECT  'child' 'name' 'node' food
	         COLLECT  'child' 'name' 'node' chimp
	           COLLECT  'child' 'name' 'node' animals
	             ROOT
	           PREDICATE
	             ELEM Object is a number : 2
	*/
	result := doc.run(
		&xPath{
			arg1: &dSort{
				arg1: &dCollect{
					ARG: collect__child__type__text__text,
					arg1: &dCollect{
						ARG: collect__child__food,
						arg1: &dCollect{
							ARG: collect__child__chimp,
							arg1: &dCollect{
								ARG:  collect__child__animals,
								arg1: &dRoot{},
							},
							arg2: &dPredicate{
								arg1: &dFunction{
									ARG: function__nth2__0__args,
								},
							},
						},
					},
				},
			},
		})
	fmt.Println("\nZoekresultaat:")
	pretty.Println(result)
	fmt.Println()
}