package svg

import "encoding/xml"
import "strings"
import "image/color"
import "github.com/mazznoer/csscolorparser"

type Style map[string]string

func ParseStyle(str string) (Style, error) {
	res := make(Style)
	rules := strings.Split(";", str)
	for _, rule := range rules {
		parts := strings.SplitN(rule, ":", 2)
		key := parts[0]
		value := "true"
		if len(parts) > 1 {
			value = parts[1]
		}
		res[key] = value
	}
	return res, nil
}

func (s *Style) UnmarshalXMLAttr(attr xml.Attr) error {
	style, err := ParseStyle(attr.Value)
	if err != nil {
		return err
	}
	*s = style
	return nil
}

var _ xml.UnmarshalerAttr = &Style{}

func (s *Style) ToColor(key string) color.Color {
	name, ok := s[key]
	if !ok {
		return color.RGBA{254, 0, 0, 255}
	}
	c, err := csscolorparser.Parse(name)
	if err != nil {
		return color.RGBA{253, 0, 0, 255}
	}
	return c
}