package repository

import (
	"gitlab.com/gitlab-org/gitaly/v16/internal/gitaly/repoutil"
	"gitlab.com/gitlab-org/gitaly/v16/internal/structerr"
	"gitlab.com/gitlab-org/gitaly/v16/proto/go/gitalypb"
	"gitlab.com/gitlab-org/gitaly/v16/streamio"
)

// SetCustomHooks sets the git hooks for a repository. The hooks are sent in a
// tar archive containing a `custom_hooks` directory. This directory is
// ultimately extracted to the repository.
func (s *server) SetCustomHooks(stream gitalypb.RepositoryService_SetCustomHooksServer) error {
	ctx := stream.Context()

	firstRequest, err := stream.Recv()
	if err != nil {
		return structerr.NewInternal("getting first request: %w", err)
	}

	repo := firstRequest.GetRepository()
	if err := s.locator.ValidateRepository(repo); err != nil {
		return structerr.NewInvalidArgument("%w", err)
	}

	reader := streamio.NewReader(func() ([]byte, error) {
		if firstRequest != nil {
			data := firstRequest.GetData()
			firstRequest = nil
			return data, nil
		}

		request, err := stream.Recv()
		return request.GetData(), err
	})

	if err := repoutil.SetCustomHooks(ctx, s.locator, s.txManager, reader, repo); err != nil {
		return structerr.NewInternal("setting custom hooks: %w", err)
	}

	return stream.SendAndClose(&gitalypb.SetCustomHooksResponse{})
}

// RestoreCustomHooks sets the git hooks for a repository. The hooks are sent in
// a tar archive containing a `custom_hooks` directory. This directory is
// ultimately extracted to the repository.
func (s *server) RestoreCustomHooks(stream gitalypb.RepositoryService_RestoreCustomHooksServer) error {
	ctx := stream.Context()

	firstRequest, err := stream.Recv()
	if err != nil {
		return structerr.NewInternal("getting first request: %w", err)
	}

	repo := firstRequest.GetRepository()
	if err := s.locator.ValidateRepository(repo); err != nil {
		return structerr.NewInvalidArgument("%w", err)
	}

	reader := streamio.NewReader(func() ([]byte, error) {
		if firstRequest != nil {
			data := firstRequest.GetData()
			firstRequest = nil
			return data, nil
		}

		request, err := stream.Recv()
		return request.GetData(), err
	})

	if err := repoutil.SetCustomHooks(ctx, s.locator, s.txManager, reader, repo); err != nil {
		return structerr.NewInternal("setting custom hooks: %w", err)
	}

	return stream.SendAndClose(&gitalypb.RestoreCustomHooksResponse{})
}
