package css

import (
	"fmt"
	"strings"

	"github.com/gorilla/css/scanner"
)

type CSSToken struct {
	Type        tokenType
	NativeToken *scanner.Token `json:"NativeToken,omitempty"`
	SubTokens   []*CSSToken    `json:"SubTokens,omitempty"`
}

func (token *CSSToken) Value() string {
	if token.NativeToken != nil {
		return token.NativeToken.Value
	}

	value := ""
	for _, token := range token.SubTokens {
		value += token.Value()
	}
	return value
}

func (token *CSSToken) NonMachineContent() bool {
	switch token.Type {
	case TokenType_Native:
		switch {
		case isNativeNonMachineContent(token.NativeToken):
			return true
		}
	}
	return false
}

func (token *CSSToken) MachineSubTokens() (result []*CSSToken) {
	result = make([]*CSSToken, 0)
	for _, token := range token.SubTokens {
		if token.NonMachineContent() {
			continue
		}
		result = append(result, token)
	}
	return
}

func (token *CSSToken) Find(tokenTypes ...tokenType) *CSSToken {
	for _, token := range token.SubTokens {
		for _, tokenType := range tokenTypes {
			if token.Type == tokenType {
				return token
			}
		}
	}
	return nil
}

func (token *CSSToken) String() string {
	retval := fmt.Sprintf("type=%s native=%s", tokenTypeNames[token.Type], token.NativeToken)
	if token.SubTokens != nil {
		retval += " {\n"
		for _, token := range token.SubTokens {
			retval += "\t" + strings.Replace(token.String(), "\n", "\n\t", -1) + "\n"
		}
		retval += "}"
	}
	return retval
}