package atom

import (
	"encoding/xml"
	"errors"
	"fmt"
)

type InlineXHTMLContent struct {
	XMLName xml.Name `xml:"content"`
	*CommonAttributes
	XHTMLDiv *XHTMLDiv
	Type     string `xml:"type,attr"`
}

// newInlineXHTMLContent creates a new InlineXHTMLContent. It returns a
// *InlineXHTMLContent and an error.
func newInlineXHTMLContent(mediaType string, content any) (*InlineXHTMLContent, error) {
	if mediaType != "xhtml" {
		return nil, fmt.Errorf("media type %v incompatible with inline xhtml content", mediaType)
	}

	xhtmlDiv, ok := content.(*XHTMLDiv)
	if !ok {
		return nil, fmt.Errorf("content type %T incompatible with inline xhtml content", content)
	}

	return &InlineXHTMLContent{Type: mediaType, XHTMLDiv: xhtmlDiv}, nil
}

// isContent checks whether the InlineXHTMLContent is a Content. It returns a
// bool.
func (i *InlineXHTMLContent) isContent() bool { return true }

// hasSRC checks whether the InlineXHTMLContent has a SRC attribute. It returns
// a bool.
func (i *InlineXHTMLContent) hasSRC() bool { return false }

// getType returns the Type of the InlineXHTMLContent as a string.
func (i *InlineXHTMLContent) getType() string { return i.Type }

// Check checks the InlineXHTMLContent for incompatibilities with RFC4287. It
// returns an error.
func (i *InlineXHTMLContent) Check() error {
	if i.Type != "xhtml" {
		return errors.New("type attribute of inline xhtml content must be xhtml")
	}

	if err := i.XHTMLDiv.Check(); err != nil {
		return fmt.Errorf("xhtml div element %v of inline xhtml content %v: %v", i.XHTMLDiv, i, err)
	}

	return nil
}