package client

import (
	"context"
	"fmt"

	v2container "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/container"
	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
	rpcapi "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc"
	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/client"
	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
)

// PrmContainerList groups parameters of ContainerList operation.
type PrmContainerList struct {
	prmCommonMeta

	ownerSet bool
	ownerID  user.ID
}

// SetAccount sets identifier of the FrostFS account to list the containers.
// Required parameter.
func (x *PrmContainerList) SetAccount(id user.ID) {
	x.ownerID = id
	x.ownerSet = true
}

func (x *PrmContainerList) formRequest(_ *Client) (*v2container.ListRequest, error) {
	if !x.ownerSet {
		return nil, errorAccountNotSet
	}

	var ownerV2 refs.OwnerID
	x.ownerID.WriteToV2(&ownerV2)

	reqBody := new(v2container.ListRequestBody)
	reqBody.SetOwnerID(&ownerV2)

	var req v2container.ListRequest
	req.SetBody(reqBody)
	return &req, nil
}

// ResContainerList groups resulting values of ContainerList operation.
type ResContainerList struct {
	statusRes

	ids []cid.ID
}

// Containers returns list of identifiers of the account-owned containers.
//
// Client doesn't retain value so modification is safe.
func (x ResContainerList) Containers() []cid.ID {
	return x.ids
}

// ContainerList requests identifiers of the account-owned containers.
//
// Exactly one return value is non-nil. By default, server status is returned in res structure.
// Any client's internal or transport errors are returned as `error`.
// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
// FrostFS status codes are returned as `error`, otherwise, are included
// in the returned result structure.
//
// Returns an error if parameters are set incorrectly (see PrmContainerList docs).
// Context is required and must not be nil. It is used for network communication.
//
// Return statuses:
//   - global (see Client docs).
func (c *Client) ContainerList(ctx context.Context, prm PrmContainerList) (*ResContainerList, error) {
	req, err := prm.formRequest(c)
	if err != nil {
		return nil, err
	}

	// init call context

	var (
		cc  contextCall
		res ResContainerList
	)

	c.initCallContext(&cc)
	cc.meta = prm.prmCommonMeta
	cc.req = req
	cc.statusRes = &res
	cc.call = func() (responseV2, error) {
		return rpcapi.ListContainers(&c.c, req, client.WithContext(ctx))
	}
	cc.result = func(r responseV2) {
		resp := r.(*v2container.ListResponse)

		res.ids = make([]cid.ID, len(resp.GetBody().GetContainerIDs()))

		for i, cidV2 := range resp.GetBody().GetContainerIDs() {
			cc.err = res.ids[i].ReadFromV2(cidV2)
			if cc.err != nil {
				cc.err = fmt.Errorf("invalid ID in the response: %w", cc.err)
				return
			}
		}
	}

	// process call
	if !cc.processCall() {
		return nil, cc.err
	}

	return &res, nil
}