vdom

type CFunc = func(ctx context.Context, props map[string]any) any

type ChildKey struct {
	Tag string
	Idx int
	Key string
}

type Component struct {
	Id      string
	Tag     string
	Key     string
	Elem    *Elem
	Mounted bool

	// hooks
	Hooks []*Hook

	// #text component
	Text string

	// base component -- vdom, wave elem, or #fragment
	Children []*Component

	// component -> component
	Comp *Component
}

type EffectWorkElem struct {
	Id          string
	EffectIndex int
}

type Elem struct {
	Id       string         `json:"id,omitempty"` // used for vdom
	Tag      string         `json:"tag"`
	Props    map[string]any `json:"props,omitempty"`
	Children []Elem         `json:"children,omitempty"`
	Text     string         `json:"text,omitempty"`
}

type Hook struct {
	Init      bool          // is initialized
	Idx       int           // index in the hook array
	Fn        func() func() // for useEffect
	UnmountFn func()        // for useEffect
	Val       any           // for useState, useMemo, useRef
	Deps      []any
}

type RootElem struct {
	OuterCtx        context.Context
	Root            *Component
	CFuncs          map[string]CFunc
	CompMap         map[string]*Component // component id -> component
	EffectWorkQueue []*EffectWorkElem
	NeedsRenderMap  map[string]bool
}

type VDomContextVal struct {
	Root    *RootElem
	Comp    *Component
	HookIdx int
}

type VDomFuncType struct {
	Fn              any      `json:"-"` // the actual function to call (called via reflection)
	FuncType        string   `json:"#func"`
	StopPropagation bool     `json:"#stopPropagation,omitempty"`
	PreventDefault  bool     `json:"#preventDefault,omitempty"`
	Keys            []string `json:"#keys,omitempty"` // special for keyDown events a list of keys to "capture"
}

type VDomRefType struct {
	RefId   string `json:"#ref"`
	Current any    `json:"current"`
}