package sml

import (
	"encoding/xml"
	"fmt"
	"strconv"

	"go.devnw.com/ooxml"
)

type CT_GradientStop struct {
	// Gradient Stop Position
	PositionAttr float64
	// Color
	Color *CT_Color
}

func NewCT_GradientStop() *CT_GradientStop {
	ret := &CT_GradientStop{}
	ret.Color = NewCT_Color()
	return ret
}

func (m *CT_GradientStop) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	start.Attr = append(start.Attr, xml.Attr{Name: xml.Name{Local: "position"},
		Value: fmt.Sprintf("%v", m.PositionAttr)})
	e.EncodeToken(start)
	secolor := xml.StartElement{Name: xml.Name{Local: "ma:color"}}
	e.EncodeElement(m.Color, secolor)
	e.EncodeToken(xml.EndElement{Name: start.Name})
	return nil
}

func (m *CT_GradientStop) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
	// initialize to default
	m.Color = NewCT_Color()
	for _, attr := range start.Attr {
		if attr.Name.Local == "position" {
			parsed, err := strconv.ParseFloat(attr.Value, 64)
			if err != nil {
				return err
			}
			m.PositionAttr = parsed
			continue
		}
	}
lCT_GradientStop:
	for {
		tok, err := d.Token()
		if err != nil {
			return err
		}
		switch el := tok.(type) {
		case xml.StartElement:
			switch el.Name {
			case xml.Name{Space: "http://schemas.openxmlformats.org/spreadsheetml/2006/main", Local: "color"},
				xml.Name{Space: "http://purl.oclc.org/ooxml/spreadsheetml/main", Local: "color"}:
				if err := d.DecodeElement(m.Color, &el); err != nil {
					return err
				}
			default:
				office.Log("skipping unsupported element on CT_GradientStop %v", el.Name)
				if err := d.Skip(); err != nil {
					return err
				}
			}
		case xml.EndElement:
			break lCT_GradientStop
		case xml.CharData:
		}
	}
	return nil
}

// Validate validates the CT_GradientStop and its children
func (m *CT_GradientStop) Validate() error {
	return m.ValidateWithPath("CT_GradientStop")
}

// ValidateWithPath validates the CT_GradientStop and its children, prefixing error messages with path
func (m *CT_GradientStop) ValidateWithPath(path string) error {
	if err := m.Color.ValidateWithPath(path + "/Color"); err != nil {
		return err
	}
	return nil
}
