package wml

import (
	"encoding/xml"
	"fmt"
)

type CT_Underline struct {
	// Underline Style
	ValAttr ST_Underline
	// Underline Color
	ColorAttr *ST_HexColor
	// Underline Theme Color
	ThemeColorAttr ST_ThemeColor
	// Underline Theme Color Tint
	ThemeTintAttr *string
	// Underline Theme Color Shade
	ThemeShadeAttr *string
}

func NewCT_Underline() *CT_Underline {
	ret := &CT_Underline{}
	return ret
}

func (m *CT_Underline) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	if m.ValAttr != ST_UnderlineUnset {
		attr, err := m.ValAttr.MarshalXMLAttr(xml.Name{Local: "w:val"})
		if err != nil {
			return err
		}
		start.Attr = append(start.Attr, attr)
	}
	if m.ColorAttr != nil {
		start.Attr = append(start.Attr, xml.Attr{Name: xml.Name{Local: "w:color"},
			Value: fmt.Sprintf("%v", *m.ColorAttr)})
	}
	if m.ThemeColorAttr != ST_ThemeColorUnset {
		attr, err := m.ThemeColorAttr.MarshalXMLAttr(xml.Name{Local: "w:themeColor"})
		if err != nil {
			return err
		}
		start.Attr = append(start.Attr, attr)
	}
	if m.ThemeTintAttr != nil {
		start.Attr = append(start.Attr, xml.Attr{Name: xml.Name{Local: "w:themeTint"},
			Value: fmt.Sprintf("%v", *m.ThemeTintAttr)})
	}
	if m.ThemeShadeAttr != nil {
		start.Attr = append(start.Attr, xml.Attr{Name: xml.Name{Local: "w:themeShade"},
			Value: fmt.Sprintf("%v", *m.ThemeShadeAttr)})
	}
	e.EncodeToken(start)
	e.EncodeToken(xml.EndElement{Name: start.Name})
	return nil
}

func (m *CT_Underline) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
	// initialize to default
	for _, attr := range start.Attr {
		if attr.Name.Local == "val" {
			m.ValAttr.UnmarshalXMLAttr(attr)
			continue
		}
		if attr.Name.Local == "color" {
			parsed, err := ParseUnionST_HexColor(attr.Value)
			if err != nil {
				return err
			}
			m.ColorAttr = &parsed
			continue
		}
		if attr.Name.Local == "themeColor" {
			m.ThemeColorAttr.UnmarshalXMLAttr(attr)
			continue
		}
		if attr.Name.Local == "themeTint" {
			parsed, err := attr.Value, error(nil)
			if err != nil {
				return err
			}
			m.ThemeTintAttr = &parsed
			continue
		}
		if attr.Name.Local == "themeShade" {
			parsed, err := attr.Value, error(nil)
			if err != nil {
				return err
			}
			m.ThemeShadeAttr = &parsed
			continue
		}
	}
	// skip any extensions we may find, but don't support
	for {
		tok, err := d.Token()
		if err != nil {
			return fmt.Errorf("parsing CT_Underline: %s", err)
		}
		if el, ok := tok.(xml.EndElement); ok && el.Name == start.Name {
			break
		}
	}
	return nil
}

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

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