package condition

import (
	"git.fsdpf.net/go/reflux/valuex"
	"git.fsdpf.net/go/req"
)

type TokenValue interface {
	GetParam(k string) valuex.Accessor
	User() req.User
}

type tValueOpt func(option *tValue)

func WithUser(user req.User) tValueOpt {
	return func(option *tValue) {
		option.user = user
	}
}

func NewTokenValue(x valuex.Accessor, opts ...tValueOpt) TokenValue {
	tv := &tValue{src: x}
	if x == nil {
		tv.src = valuex.Nil
	} else if up, ok := x.(interface{ User() req.User }); ok {
		tv.user = up.User()
	}
	for _, opt := range opts {
		if opt != nil {
			opt(tv)
		}
	}
	if tv.user == nil {
		panic("user is required")
	}
	return tv
}

type tValue struct {
	src  valuex.Accessor
	user req.User
}

func (this *tValue) GetParam(k string) valuex.Accessor {
	if v, ok := this.src.Lookup(k); ok {
		return v
	}
	return valuex.Nil
}

func (this *tValue) User() req.User {
	return this.user
}