package command

import (
	"context"
	"fmt"
	"os/signal"

	"github.com/opencloud-eu/reva/v2/pkg/events/stream"
	"github.com/opencloud-eu/reva/v2/pkg/store"
	"github.com/urfave/cli/v2"
	microstore "go-micro.dev/v4/store"

	"github.com/opencloud-eu/opencloud/pkg/config/configlog"
	"github.com/opencloud-eu/opencloud/pkg/generators"
	"github.com/opencloud-eu/opencloud/pkg/runner"
	ogrpc "github.com/opencloud-eu/opencloud/pkg/service/grpc"
	"github.com/opencloud-eu/opencloud/pkg/tracing"
	"github.com/opencloud-eu/opencloud/pkg/version"
	"github.com/opencloud-eu/opencloud/services/eventhistory/pkg/config"
	"github.com/opencloud-eu/opencloud/services/eventhistory/pkg/config/parser"
	"github.com/opencloud-eu/opencloud/services/eventhistory/pkg/logging"
	"github.com/opencloud-eu/opencloud/services/eventhistory/pkg/metrics"
	"github.com/opencloud-eu/opencloud/services/eventhistory/pkg/server/debug"
	"github.com/opencloud-eu/opencloud/services/eventhistory/pkg/server/grpc"
)

// Server is the entrypoint for the server command.
func Server(cfg *config.Config) *cli.Command {
	return &cli.Command{
		Name:     "server",
		Usage:    fmt.Sprintf("start the %s service without runtime (unsupervised mode)", cfg.Service.Name),
		Category: "server",
		Before: func(c *cli.Context) error {
			return configlog.ReturnFatal(parser.ParseConfig(cfg))
		},
		Action: func(c *cli.Context) error {
			logger := logging.Configure(cfg.Service.Name, cfg.Log)
			traceProvider, err := tracing.GetServiceTraceProvider(cfg.Tracing, cfg.Service.Name)
			if err != nil {
				return err
			}

			cfg.GrpcClient, err = ogrpc.NewClient(
				append(ogrpc.GetClientOptions(cfg.GRPCClientTLS), ogrpc.WithTraceProvider(traceProvider))...,
			)
			if err != nil {
				return err
			}

			var cancel context.CancelFunc
			if cfg.Context == nil {
				cfg.Context, cancel = signal.NotifyContext(context.Background(), runner.StopSignals...)
				defer cancel()
			}
			ctx := cfg.Context

			m := metrics.New()
			m.BuildInfo.WithLabelValues(version.GetString()).Set(1)

			gr := runner.NewGroup()

			connName := generators.GenerateConnectionName(cfg.Service.Name, generators.NTypeBus)
			consumer, err := stream.NatsFromConfig(connName, false, stream.NatsConfig(cfg.Events))
			if err != nil {
				return err
			}

			st := store.Create(
				store.Store(cfg.Store.Store),
				store.TTL(cfg.Store.TTL),
				microstore.Nodes(cfg.Store.Nodes...),
				microstore.Database(cfg.Store.Database),
				microstore.Table(cfg.Store.Table),
				store.Authentication(cfg.Store.AuthUsername, cfg.Store.AuthPassword),
			)

			service := grpc.NewService(
				grpc.Logger(logger),
				grpc.Context(ctx),
				grpc.Config(cfg),
				grpc.Name(cfg.Service.Name),
				grpc.Namespace(cfg.GRPC.Namespace),
				grpc.Address(cfg.GRPC.Addr),
				grpc.Metrics(m),
				grpc.Consumer(consumer),
				grpc.Persistence(st),
				grpc.TraceProvider(traceProvider),
			)

			gr.Add(runner.NewGoMicroGrpcServerRunner(cfg.Service.Name+".grpc", service))

			{
				debugServer, err := debug.Server(
					debug.Logger(logger),
					debug.Context(ctx),
					debug.Config(cfg),
				)
				if err != nil {
					logger.Info().Err(err).Str("server", "debug").Msg("Failed to initialize server")
					return err
				}

				gr.Add(runner.NewGolangHttpServerRunner(cfg.Service.Name+".debug", debugServer))
			}

			grResults := gr.Run(ctx)

			// return the first non-nil error found in the results
			for _, grResult := range grResults {
				if grResult.RunnerError != nil {
					return grResult.RunnerError
				}
			}
			return nil
		},
	}
}