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// SPDX-FileCopyrightText: 2025 Shota FUJI <pockawoooh@gmail.com>
// SPDX-License-Identifier: AGPL-3.0-only

package workspace

import (
	"context"

	"connectrpc.com/connect"
	"google.golang.org/protobuf/proto"

	"pocka.jp/x/yamori/backend/core/event"
	"pocka.jp/x/yamori/backend/core/projection"
	errorV1 "pocka.jp/x/yamori/proto/go/error/v1"
	workspaceV2 "pocka.jp/x/yamori/proto/go/workspace/v2"
)

func (s *Service) Get(
	ctx context.Context,
	req *connect.Request[workspaceV2.GetRequest],
) (*connect.Response[workspaceV2.GetResponse], error) {
	logger := s.core.Logger.With(
		"service", "yamori.workspace.v2.WorkspaceService",
		"method", "Get",
	)

	header := req.Header()
	token, err := s.core.LoadTokenFromCookie(&header)
	if err != nil || token == nil {
		return connect.NewResponse(&workspaceV2.GetResponse{
			Result: &workspaceV2.GetResponse_AuthenticationError{
				AuthenticationError: &errorV1.AuthenticationError{},
			},
		}), nil
	}

	tx, err := s.core.DB.Begin()
	if err != nil {
		logger.Error("Failed to begin transaction", "error", err)
		return connect.NewResponse(&workspaceV2.GetResponse{
			Result: &workspaceV2.GetResponse_SystemError{
				SystemError: &errorV1.SystemError{
					Message: proto.String("Database error"),
				},
			},
		}), nil
	}
	defer tx.Rollback()

	secret, err := projection.GetLoginJwtSecret(tx)
	if err != nil {
		logger.Error("Failed to read login_jwt_secret projection", "error", err)
		return connect.NewResponse(&workspaceV2.GetResponse{
			Result: &workspaceV2.GetResponse_SystemError{
				SystemError: &errorV1.SystemError{
					Message: proto.String("Database error"),
				},
			},
		}), nil
	}

	workspace, err := projection.GetWorkspace(tx)
	if err != nil {
		logger.Error("Failed to read workspace projection", "error", err)
		return connect.NewResponse(&workspaceV2.GetResponse{
			Result: &workspaceV2.GetResponse_SystemError{
				SystemError: &errorV1.SystemError{
					Message: proto.String("Database error"),
				},
			},
		}), nil
	}

	users, err := projection.GetUsers(tx)
	if err != nil {
		logger.Error("Failed to read users projection", "error", err)
		return connect.NewResponse(&workspaceV2.GetResponse{
			Result: &workspaceV2.GetResponse_SystemError{
				SystemError: &errorV1.SystemError{
					Message: proto.String("Database error"),
				},
			},
		}), nil
	}

	if err := event.UpdateProjections(tx, workspace, secret, users); err != nil {
		logger.Error("Failed to update projections", "error", err)
		return connect.NewResponse(&workspaceV2.GetResponse{
			Result: &workspaceV2.GetResponse_SystemError{
				SystemError: &errorV1.SystemError{
					Message: proto.String("Database error"),
				},
			},
		}), nil
	}

	if err := token.Validate(secret); err != nil {
		logger.Warn("Invalid token found", "error", err)
		return connect.NewResponse(&workspaceV2.GetResponse{
			Result: &workspaceV2.GetResponse_AuthenticationError{
				AuthenticationError: &errorV1.AuthenticationError{},
			},
		}), nil
	}

	return connect.NewResponse(&workspaceV2.GetResponse{
		Result: &workspaceV2.GetResponse_Ok{
			Ok: projectionWorkspaceToMessage(workspace.Projection, users.Projection),
		},
	}), nil
}