ast

type BJK struct {
	Version Version `Header @@`

	Graph *Graph `"(" @@* ")"`
}

type Connection struct {
	NodeIdx   uint64 `"node_idx" ":" @Int ","?`
	ParamName string `"param_name" ":" @String ","?`
}

type DependencyKind struct {
	External   *External   `  "External" "(" @@* ")" ","?`
	Connection *Connection `| "Conection" "(" @@* ")" ","?`
}

type External struct {
	Promoted *string `"promoted" ":" ( "Some" "(" @String ")" | "None" ) ","?`
}

type ExternalParameters struct {
	ParamValues []*ParamValue `"(" "param_values" ":" "{" @@* "}" ","? ")" ","?`
}

type Graph struct {
	Nodes []*Node `"nodes" ":" "[" ( "(" @@* ")" ","? )* "]" ","?`

	DefaultNode *uint64 `( "default_node" ":" ( "Some" "(" @Int ")" | "None" ) ","? )?`

	UIData *UIData `( "ui_data" ":" ( "Some" "(" @@ ")" | "None" ) ","? )?`

	ExternalParameters *ExternalParameters `( "external_parameters" ":"  ( "Some" "(" @@ ")" | "None" ) ","? )?`
}

type Input struct {
	Name     string         `"name" ":" @String ","*`
	DataType string         `"data_type" ":" @String ","*`
	Kind     DependencyKind `"kind" ":" @@ ","*`

	// Props are not preserved in the BJK file.
	Props map[string]lua.LValue
}

type Node struct {
	OpName      string    `"op_name" ":" @String ","?` // e.g. "MakeScalar"
	ReturnValue *string   `"return_value" ":" ( "Some" "(" @String ")" | "None" ) ","?`
	Inputs      []*Input  `"inputs" ":" "[" ( "(" @@* ")" ","? )* "]" ","?`
	Outputs     []*Output `"outputs" ":" "[" ( "(" @@* ")" ","? )* "]" ","?`

	// Label is not preserved in the BJK file.
	Label string // e.g. "Scalar"
	// Index is not preserved in the BJK file.
	Index uint64
	// NodePosition, if set, is used to manually position the node.
	NodePosition *Vec2

	// EvalOutputs are generated by Eval but not preserved in the BJK file.
	EvalOutputs map[string]lua.LValue
}

type Output struct {
	Name     string `"name" ":" @String ","*`
	DataType string `"data_type" ":" @String ","*`
}

type ParamValue struct {
	NodeIdx   uint64 `"(" "node_idx" ":" @Int ","?`
	ParamName string `"param_name" ":" @String ","? ")" ":"`

	ValueEnum ValueEnum `@@`
}

type ScalarValue struct {
	X float64 `"Scalar" "(" @Float ")" ","?`
}

type SelectionValue struct {
	Selection string `"String" "(" @String ")" ","?`
}

type StringValue struct {
	S string `"String" "(" @String ")" ","?`
}

type UIData struct {
	NodePositions    []*Vec2  `"(" "node_positions" ":" "[" @@* "]" ","?`
	NodeOrder        []uint64 `"node_order" ":" "[" ( @Int ","? )* "]" ","?`
	Pan              Vec2     `"pan" ":" @@ ","?`
	Zoom             float64  `"zoom" ":" @Float ","?`
	LockedGizmoNodes []uint64 `"locked_gizmo_nodes" ":" "["  ( @Int ","? )* "]" ","? ")" ","?`
}

type ValueEnum struct {
	Scalar    *ScalarValue    `  @@`
	Selection *SelectionValue `| @@`
	StrVal    *StringValue    `| @@`
	Vector    *VectorValue    `| @@`
}

type Vec2 struct {
	X float64 `"(" @Float ","`
	Y float64 `@Float ")" ","?`
}

type VectorValue struct {
	X float64 `"Vector" "(" "(" @Float ","`
	Y float64 `@Float ","`
	Z float64 `@Float ")" ")" ","?`
}

type Version struct {
	Major int `@Int`
	Minor int `@Int`
	Patch int `@Int`
}