package acl

import (
	"fmt"

	v2 "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/acl/v2"
	aclSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/acl"
	policyengine "git.frostfs.info/TrueCloudLab/policy-engine"
)

type Request struct {
	operation  string
	resource   *resource
	properties map[string]string
}

var _ policyengine.Request = (*Request)(nil)

type resource struct {
	name       string
	properties map[string]string
}

var _ policyengine.Resource = (*resource)(nil)

func (r *resource) Name() string {
	return r.name
}

func (r *resource) Property(key string) string {
	return r.properties[key]
}

// TODO (aarifullin): these stringified verbs, properties and namespaces
// should be non-implementation-specific.
func getResource(reqInfo v2.RequestInfo) *resource {
	cid := reqInfo.ContainerID()
	oid := "*"
	if reqOID := reqInfo.ObjectID(); reqOID != nil {
		oid = reqOID.EncodeToString()
	}
	name := fmt.Sprintf("native:::object/%s/%s",
		cid,
		oid)

	return &resource{
		name:       name,
		properties: make(map[string]string),
	}
}

func getProperties(_ v2.RequestInfo) map[string]string {
	return map[string]string{
		"Actor": "",
	}
}

// TODO (aarifullin): these stringified verbs, properties and namespaces
// should be non-implementation-specific.
func getOperation(reqInfo v2.RequestInfo) string {
	var verb string
	switch op := reqInfo.Operation(); op {
	case aclSDK.OpObjectGet:
		verb = "GetObject"
	case aclSDK.OpObjectHead:
		verb = "HeadObject"
	case aclSDK.OpObjectPut:
		verb = "PutObject"
	case aclSDK.OpObjectDelete:
		verb = "DeleteObject"
	case aclSDK.OpObjectSearch:
		verb = "SearchObject"
	case aclSDK.OpObjectRange:
		verb = "RangeObject"
	case aclSDK.OpObjectHash:
		verb = "HashObject"
	}

	return "native:" + verb
}

func NewRequest() *Request {
	return &Request{
		resource:   new(resource),
		properties: map[string]string{},
	}
}

func (r *Request) FromRequestInfo(ri v2.RequestInfo) {
	r.operation = getOperation(ri)
	r.resource = getResource(ri)
	r.properties = getProperties(ri)
}

func (r *Request) Operation() string {
	return r.operation
}

func (r *Request) Property(key string) string {
	return r.properties[key]
}

func (r *Request) Resource() policyengine.Resource {
	return r.resource
}