package compute

import (
	"context"
	"encoding/json"
	"net/http"

	"repository.basistech.ru/BASIS/decort-golang-sdk/internal/constants"
	"repository.basistech.ru/BASIS/decort-golang-sdk/internal/validators"
)

// Target describes a target for migration
type Target struct {
	// SEP ID
	// Required: true
	SepID uint64 `url:"sep_id" json:"sep_id" validate:"required"`

	// Name of a pool
	// Required: true
	PoolName string `url:"pool_name" json:"pool_name" validate:"required"`

	// Storage policy ID
	// Required: false
	StoragePolicyID uint64 `url:"storage_policy_id,omitempty" json:"storage_policy_id,omitempty"`

	// Disk IDs
	// Required: false
	DiskIDs []uint64 `url:"disk_ids,omitempty" json:"disk_ids,omitempty"`
}

// Storage describes a destination for a disk
type Storage struct {
	// Target for migration
	// Required: false
	Targets []Target `url:"targets,omitempty" json:"targets,omitempty"`

	// Whether a separate source-disk cleanup job should be started after full success
	// Required: false
	AutoCleanup interface{} `url:"auto_cleanup,omitempty" json:"auto_cleanup,omitempty" validate:"omitempty,isBool"`
}

// MigrateV2Request to start a migration of a compute or a disk
type MigrateV2Request struct {
	// ID of compute to migrate
	// Required: true
	ComputeID uint64 `url:"compute_id" json:"compute_id" validate:"required"`

	// Stateless load balancers support only compute mode, including their local system disk.
	// Required: false
	Mode string `url:"mode,omitempty" json:"mode,omitempty" validate:"omitempty,migrateV2Mode"`

	// ID of node to migrate to
	// Required: false
	TargetNodeID uint64 `url:"target_node_id,omitempty" json:"target_node_id,omitempty"`

	// Destination for a disk
	// Required: false
	Storage Storage `url:"storage,omitempty" json:"storage,omitempty"`
}

// MigrateV2 starts a migration of a compute or a disk
func (c Compute) MigrateV2(ctx context.Context, req MigrateV2Request) (string, error) {
	err := validators.ValidateRequest(req)
	if err != nil {
		return "", validators.ValidationErrors(validators.GetErrors(err))
	}

	url := "/cloudbroker/compute/migrate_v2"

	res, err := c.client.DecortApiCallCtype(ctx, http.MethodPost, url, constants.MIMEJSON, req)
	if err != nil {
		return "", err
	}

	var resp string

	err = json.Unmarshal(res, &resp)
	if err != nil {
		return "", err
	}

	return resp, nil
}