package rest

import (
	"context"
	"fmt"
	"net/http"
	"sync"

	"github.com/go-chi/chi/v5"
	"github.com/go-chi/chi/v5/middleware"
	"github.com/waku-org/go-waku/waku/v2/node"
	"go.uber.org/zap"
)

type WakuRest struct {
	node   *node.WakuNode
	server *http.Server

	log *zap.Logger

	relayService  *RelayService
	filterService *FilterService
}

type RestConfig struct {
	Address             string
	Port                uint
	EnablePProf         bool
	EnableAdmin         bool
	RelayCacheCapacity  uint
	FilterCacheCapacity uint
}

func NewWakuRest(node *node.WakuNode, config RestConfig, log *zap.Logger) *WakuRest {
	wrpc := new(WakuRest)
	wrpc.log = log.Named("rest")

	mux := chi.NewRouter()
	mux.Use(middleware.Logger)
	mux.Use(middleware.NoCache)
	mux.Use(func(h http.Handler) http.Handler {
		fn := func(w http.ResponseWriter, r *http.Request) {
			w.Header().Set("Access-Control-Allow-Origin", "*")
			h.ServeHTTP(w, r)
		}
		return http.HandlerFunc(fn)
	})
	if config.EnablePProf {
		mux.Mount("/debug", middleware.Profiler())
	}

	_ = NewDebugService(node, mux)
	_ = NewHealthService(node, mux)
	_ = NewStoreQueryService(node, mux)
	_ = NewLegacyStoreService(node, mux)
	_ = NewLightpushService(node, mux, log)

	listenAddr := fmt.Sprintf("%s:%d", config.Address, config.Port)

	server := &http.Server{
		Addr:    listenAddr,
		Handler: mux,
	}

	wrpc.node = node
	wrpc.server = server

	if node.Relay() != nil {
		relayService := NewRelayService(node, mux, config.RelayCacheCapacity, log)
		wrpc.relayService = relayService
	}

	if config.EnableAdmin {
		_ = NewAdminService(node, mux, wrpc.log)
	}

	if node.FilterLightnode() != nil {
		filterService := NewFilterService(node, mux, int(config.FilterCacheCapacity), log)
		server.RegisterOnShutdown(func() {
			filterService.Stop()
		})
		wrpc.filterService = filterService
	}

	return wrpc
}

func (r *WakuRest) Start(ctx context.Context, wg *sync.WaitGroup) {
	defer wg.Done()

	if r.node.FilterLightnode() != nil {
		go r.filterService.Start(ctx)
	}

	go func() {
		_ = r.server.ListenAndServe()
	}()
	r.log.Info("server started", zap.String("addr", r.server.Addr))
}

func (r *WakuRest) Stop(ctx context.Context) error {
	r.log.Info("shutting down server")
	return r.server.Shutdown(ctx)
}