package lexer

import (
	"fmt"

	"github.com/mmakaay/toml/parser"
)

// Definition of all the lexer item types for the TOML lexer.
const (
	ItemComment    parser.ItemType = iota // An error occurred
	ItemKey                               // Key of a key/value pair
	ItemKeyDot                            // Dot for a dotted key
	ItemAssignment                        // Value assignment coming up (=)
	ItemString                            // A value of type string
)

// ParserItemToString returns a string representation of the
// parser.Item. This is used for unit testing purposes.
func ParserItemToString(i parser.Item) string {
	switch i.Type {
	case ItemComment:
		return fmt.Sprintf("#(%s)", i.Value)
	case ItemKey:
		return fmt.Sprintf("[%s]", i.Value)
	case ItemString:
		return fmt.Sprintf("STR(%s)", i.Value)
	case ItemKeyDot:
		return "."
	case ItemAssignment:
		return "="
	default:
		panic(fmt.Sprintf("No string representation available for parser.Item id %d", i.Type))
	}
}