// SPDX-License-Identifier: Apache-2.0

package filesystem

import (
	"context"
	"fmt"
	"os"
	"path/filepath"

	"connectrpc.com/connect"

	"git.omukk.dev/wrenn/sandbox/envd/internal/permissions"
	rpc "git.omukk.dev/wrenn/sandbox/envd/internal/services/spec/filesystem"
)

func (s Service) Move(ctx context.Context, req *connect.Request[rpc.MoveRequest]) (*connect.Response[rpc.MoveResponse], error) {
	u, err := permissions.GetAuthUser(ctx, s.defaults.User)
	if err != nil {
		return nil, err
	}

	source, err := permissions.ExpandAndResolve(req.Msg.GetSource(), u, s.defaults.Workdir)
	if err != nil {
		return nil, connect.NewError(connect.CodeInvalidArgument, err)
	}

	destination, err := permissions.ExpandAndResolve(req.Msg.GetDestination(), u, s.defaults.Workdir)
	if err != nil {
		return nil, connect.NewError(connect.CodeInvalidArgument, err)
	}

	uid, gid, userErr := permissions.GetUserIdInts(u)
	if userErr != nil {
		return nil, connect.NewError(connect.CodeInternal, userErr)
	}

	userErr = permissions.EnsureDirs(filepath.Dir(destination), uid, gid)
	if userErr != nil {
		return nil, connect.NewError(connect.CodeInternal, userErr)
	}

	err = os.Rename(source, destination)
	if err != nil {
		if os.IsNotExist(err) {
			return nil, connect.NewError(connect.CodeNotFound, fmt.Errorf("source file not found: %w", err))
		}

		return nil, connect.NewError(connect.CodeInternal, fmt.Errorf("error renaming: %w", err))
	}

	entry, err := entryInfo(destination)
	if err != nil {
		return nil, err
	}

	return connect.NewResponse(&rpc.MoveResponse{
		Entry: entry,
	}), nil
}