// statuspage-devserver stellt das OPS-02-Backend (internal/statuspage) fuer
// die Next.js-Statusseite bereit und startet den periodischen Poller.
// Getrennt von cmd/core aus demselben Grund wie die anderen *-devserver.
package main

import (
	"context"
	"log"
	"net/http"
	"os"
	"strconv"
	"time"

	"gitea.perlbach24.de/scripte/nexarch/internal/db"
	"gitea.perlbach24.de/scripte/nexarch/internal/statuspage"
)

func main() {
	dsn := os.Getenv("NEXARCH_REGISTRY_DSN")
	if dsn == "" {
		log.Fatal("NEXARCH_REGISTRY_DSN nicht gesetzt")
	}
	addr := os.Getenv("NEXARCH_STATUSPAGE_LISTEN_ADDR")
	if addr == "" {
		addr = ":8084"
	}
	intervalSeconds := 10
	if v := os.Getenv("NEXARCH_STATUSPAGE_POLL_INTERVAL_SECONDS"); v != "" {
		if parsed, err := strconv.Atoi(v); err == nil {
			intervalSeconds = parsed
		}
	}

	ctx := context.Background()
	pool, err := db.Connect(ctx, dsn)
	if err != nil {
		log.Fatalf("db: %v", err)
	}
	defer pool.Close()

	store := statuspage.NewStore(pool)
	checker := statuspage.NewHTTPChecker(2 * time.Second)
	poller := statuspage.NewPoller(store, checker)
	go poller.Run(ctx, time.Duration(intervalSeconds)*time.Second)

	mux := http.NewServeMux()
	mux.HandleFunc("/status/overview", withCORS(store.OverviewHandler))
	mux.HandleFunc("/status/history", withCORS(store.HistoryHandler))
	mux.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(http.StatusOK) })

	log.Printf("statuspage-devserver listening on %s (poll-intervall: %ds)", addr, intervalSeconds)
	log.Fatal(http.ListenAndServe(addr, mux))
}

func withCORS(next http.HandlerFunc) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Access-Control-Allow-Origin", "*")
		w.Header().Set("Access-Control-Allow-Methods", "GET, OPTIONS")
		w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
		if r.Method == http.MethodOptions {
			w.WriteHeader(http.StatusOK)
			return
		}
		next(w, r)
	}
}