// Package cli 命令行入口。
package cli

import (
	"context"
	"errors"
	"log"
	"net/http"
	"os"
	"os/signal"
	"strconv"
	"syscall"
	"time"

	"github.com/openteam/server/internal/api"
	"github.com/openteam/server/internal/app"
	"github.com/openteam/server/internal/config"
	"github.com/openteam/server/internal/proxy"
)

// serve 启动 HTTP 服务（默认子命令）。
func serve() error {
	cfg, err := config.Load()
	if err != nil {
		return err
	}

	a, err := app.New(cfg)
	if err != nil {
		return err
	}
	defer a.Shutdown(context.Background())

	gw := proxy.NewGateway(a.DB, a.Enc, a.Usage, a.Limit, cfg.RateLimit.UserRPS, cfg.Proxy.LogRaw)
	router := api.NewRouter(a, gw)

	srv := &http.Server{
		Addr:              ":" + strconv.Itoa(cfg.Port),
		Handler:           router,
		ReadHeaderTimeout: 10 * time.Second,
	}

	go func() {
		log.Printf("openteam listening on %s (env=%s)", srv.Addr, cfg.Env)
		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
			log.Fatalf("server: %v", err)
		}
	}()

	quit := make(chan os.Signal, 1)
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit

	log.Println("shutting down...")
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	if err := srv.Shutdown(ctx); err != nil {
		log.Printf("server shutdown: %v", err)
	}
	a.Usage.Close()
	return nil
}