package xvdoc

import (
	"encoding/json"
	"fmt"
)

type ObjConstructor func(JSONMap) (Cell, error)

var (
	objConstructors = map[string]ObjConstructor{
		"formula": constructorFormula,
	}
)

func constructorObject(dec *json.Decoder, t json.Token) (res Cell, err error) {
	m := make(JSONMap)
	if _, check := t.(json.Delim); check && t == json.Delim('{') {
		for err == nil {
			if t, err = dec.Token(); err == nil {
				if _, check := t.(json.Delim); check {
					if t == json.Delim('}') {
						if constructor, check := objConstructors[m.StringVal("type", "")]; check {
							res, err = constructor(m)
						} else {
							res = &CellObj{
								value:  m.Interface("value"),
								styles: m.StringArray("styles"),
							}
						}
						return
					}
				} else {
					var i interface{}
					if err = dec.Decode(&i); err == nil {
						m[t.(string)] = i
					}
				}
			}
		}
	}
	return
}

////////////////////////////////////////////

type CellObj struct {
	value  interface{}
	styles []string
}

func (s *CellObj) Val() interface{} {
	return s.value
}

func (s *CellObj) Type() string {
	return ""
}

func (s *CellObj) String() string {
	return fmt.Sprintf("{ value :: %v }", s.value)
}

func (s *CellObj) Styles() (res []string) {
	return s.styles
}