package middleware

import (
	"context"
	"errors"

	"forge.cadoles.com/wpetit/goweb/service"
	"github.com/go-chi/chi/middleware"
)

const (
	// KeyServiceContainer is the context key associated with the ServiceContainer value
	KeyServiceContainer ContextKey = "serviceContainer"
)

// ErrInvalidServiceContainer is returned when no service container
// could be found on the given context
var ErrInvalidServiceContainer = errors.New("invalid service container")

// GetServiceContainer retrieves the service container from the given context
func GetServiceContainer(ctx context.Context) (*service.Container, error) {
	container, ok := ctx.Value(KeyServiceContainer).(*service.Container)
	if !ok {
		return nil, ErrInvalidServiceContainer
	}
	return container, nil
}

// ServiceContainer expose the given service container as a context value
// on the HTTP requests
func ServiceContainer(container *service.Container) Middleware {
	return middleware.WithValue(KeyServiceContainer, container)
}