package bootstrap

import (
	"context"
	"fmt"

	"go.uber.org/fx"
	"go.uber.org/zap"

	edgenode "iop/apps/edge/internal/node"
	"iop/apps/edge/internal/transport"
	"iop/packages/config"
	"iop/packages/observability"
)

func Module(cfg *config.EdgeConfig) fx.Option {
	return fx.Options(
		fx.Provide(
			func() *config.EdgeConfig { return cfg },

			func(cfg *config.EdgeConfig) (*zap.Logger, error) {
				return observability.NewLogger(cfg.Logging.Level, cfg.Logging.Pretty)
			},

			func() *edgenode.Registry {
				return edgenode.NewRegistry()
			},

			func() *edgenode.NodeStore {
				return edgenode.NewNodeStore()
			},

			func(cfg *config.EdgeConfig, reg *edgenode.Registry, ns *edgenode.NodeStore, logger *zap.Logger) (*transport.Server, error) {
				return transport.NewServer(cfg.Server.Listen, reg, ns, logger)
			},
		),

		fx.Invoke(func(lc fx.Lifecycle, srv *transport.Server, ns *edgenode.NodeStore, cfg *config.EdgeConfig, logger *zap.Logger) {
			lc.Append(fx.Hook{
				OnStart: func(ctx context.Context) error {
					seeded, err := edgenode.LoadFromConfig(cfg.Nodes)
					if err != nil {
						return fmt.Errorf("edge: seed node store: %w", err)
					}
					for _, rec := range seeded.All() {
						ns.Add(rec)
					}
					if err := srv.Start(ctx); err != nil {
						return err
					}
					go func() {
						if err := observability.ServeMetrics(cfg.Metrics.Port); err != nil {
							logger.Warn("metrics server exited", zap.Error(err))
						}
					}()
					return nil
				},
				OnStop: func(_ context.Context) error {
					return srv.Stop()
				},
			})
		}),
	)
}