package live

import (
	"encoding/json"
	"errors"

	"cloud.o-forge.io/core/oc-lib/logs"
	"cloud.o-forge.io/core/oc-lib/models/utils"
	"cloud.o-forge.io/core/oc-lib/tools"
)

type computeUnitsMongoAccessor[T LiveInterface] struct {
	utils.AbstractAccessor[LiveInterface] // AbstractAccessor contains the basic fields of an accessor (model, caller)
}

// New creates a new instance of the computeUnitsMongoAccessor
func NewAccessor[T LiveInterface](t tools.DataType, request *tools.APIRequest) *computeUnitsMongoAccessor[T] {
	return &computeUnitsMongoAccessor[T]{
		AbstractAccessor: utils.AbstractAccessor[LiveInterface]{
			Logger:  logs.CreateLogger(t.String()), // Create a logger with the data type
			Request: request,
			Type:    t,
			New: func() LiveInterface {
				switch t {
				case tools.LIVE_DATACENTER:
					return &LiveDatacenter{}
				case tools.LIVE_STORAGE:
					return &LiveStorage{}
				}
				return &LiveDatacenter{}
			},
		},
	}
}

/*
* Nothing special here, just the basic CRUD operations
 */
func (a *computeUnitsMongoAccessor[T]) CopyOne(data utils.DBObject) (utils.DBObject, int, error) {
	// is a publisher... that become a resources.
	if data.IsDrafted() {
		return nil, 422, errors.New("can't publish a drafted compute units")
	}
	live := data.(T)
	if live.GetMonitorPath() == "" || live.GetID() != "" {
		return nil, 422, errors.New("publishing is only allowed is it can be monitored and be accessible")
	}
	if res, code, err := a.LoadOne(live.GetID()); err != nil {
		return nil, code, err
	} else {
		live = res.(T)
	}
	resAccess := live.GetResourceAccessor(a.Request)
	instance := live.GetResourceInstance()
	b, _ := json.Marshal(live)
	json.Unmarshal(b, instance)

	if len(live.GetResourcesID()) > 0 {
		for _, r := range live.GetResourcesID() {
			// TODO dependent of a existing resource
			res, code, err := resAccess.LoadOne(r)
			if err == nil {
				return nil, code, err
			}
			existingResource := live.GetResource()
			b, _ := json.Marshal(res)
			json.Unmarshal(b, existingResource)
			live.SetResourceInstance(existingResource, instance)
			resAccess.UpdateOne(existingResource, existingResource.GetID())
		}
		if live.GetID() != "" {
			return a.LoadOne(live.GetID())
		} else {
			return a.StoreOne(live)
		}
	} else {
		r := live.GetResource()
		b, _ := json.Marshal(live)
		json.Unmarshal(b, &r)
		live.SetResourceInstance(r, instance)
		res, code, err := resAccess.StoreOne(r)
		if err != nil {
			return nil, code, err
		}
		live.SetResourcesID(res.GetID())
		if live.GetID() != "" {
			return a.UpdateOne(live, live.GetID())
		} else {
			return a.StoreOne(live)
		}
	}
}