type Asset struct {
	ID          string `json:"_id" mapstructure:"_id"`
	AltText     string `json:"altText" mapstructure:"altText"`
	Description string `json:"description" mapstructure:"description"`
	Metadata    struct {
		Dimensions struct {
			AspectRatio float64 `json:"aspectRatio" mapstructure:"aspectRatio"`
			Height      int     `json:"height" mapstructure:"height"`
			Width       int     `json:"width" mapstructure:"width"`
		} `json:"dimensions"`
	} `json:"metadata"`
	Path  string `json:"path" mapstructure:"path"`
	Title string `json:"title" mapstructure:"title"`
	URL   string `json:"url" mapstructure:"url"`
}

type BaseBlock struct {
	// Key is a unique identifier for the block.
	Key string `json:"_key" mapstructure:"_key"`
	// The type makes it possible for a serializer to parse the contents of the block.
	Type Type `json:"_type" mapstructure:"_type"`
}

type Block struct {
	BaseBlock `mapstructure:",squash"`

	// Union type.
	// A block can be either a text block or an image block.
	// The type field is used to determine which type of block it is.
	Text  `mapstructure:",squash"`
	Image `mapstructure:",squash"`
	Code  `mapstructure:",squash"`
}

type Blocks []Block

type Child struct {
	// The type makes it possible for a serializer to parse the contents of the block.
	Type Type `json:"_type" mapstructure:"_type"`

	// Marks are how we mark up inline text with additional data/features.
	//  Marks comes in two forms: Decorators and Annotations.
	// Decorators are marks as simple string values, while Annotations are keys to a data structure.
	// marks is therefore either an array of string values, or keys, corresponding to markDefs, with the same _key.
	Marks []string `json:"marks" mapstructure:"marks"`

	// The text contents of the span.
	Text string `json:"text" mapstructure:"text"`
}

type Code struct {
	Code     string `json:"code" mapstructure:"code"`
	Filename string `json:"filename" mapstructure:"filename"`
	Language string `json:"language" mapstructure:"language"`
}

type Image struct {
	Asset Asset `json:"asset" mapstructure:"asset"`
}

type MarkDef struct {
	Key  string `json:"_key" mapstructure:"_key"`
	Type Type   `json:"_type" mapstructure:"_type"`
	Href string `json:"href" mapstructure:"href"`
}

type Style string

type Text struct {
	// Children is an array of spans or custom inline types that is contained within a block.
	Children []Child `json:"children" mapstructure:"children"`

	// MarkDefs definitions is an array of objects with a key, type and some data.
	// Mark definitions are tied to spans by adding the referring _key in the marks array.
	MarkDefs []MarkDef `json:"markDefs" mapstructure:"markDefs"`

	// Style typically describes a visual property for the whole block.
	Style Style `json:"style,omitempty" mapstructure:"style"`

	// Level is used to express visual nesting and hierarchical structures between blocks in the array.
	Level int `json:"level,omitempty" mapstructure:"level"`

	// A block can be given the property listItem with a value that describes which kind of list it is.
	// Typically bullet, number, square and so on.
	// The list position is derived from the position the block has in the array and surrounding list items on the same level.
	ListItem string `json:"listItem,omitempty" mapstructure:"listItem"`
}

type Type string

const (
	TypeBlock Type = "block"
	TypeSpan  Type = "span"
)