package main

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

	"balance-server/internal/config"
	"balance-server/internal/database"
	"balance-server/internal/httpapi"
)

func main() {
	logger := slog.New(slog.NewJSONHandler(os.Stdout, nil))
	cfg, err := config.Load()
	if err != nil {
		logger.Error("configuration error", "error", err)
		os.Exit(1)
	}
	db, err := database.Open(cfg.DatabasePath)
	if err != nil {
		logger.Error("database error", "error", err)
		os.Exit(1)
	}
	defer db.Close()

	server := &http.Server{
		Addr:              cfg.Address,
		Handler:           httpapi.New(cfg, db, logger),
		ReadHeaderTimeout: 5 * time.Second,
		ReadTimeout:       15 * time.Second,
		WriteTimeout:      30 * time.Second,
		IdleTimeout:       60 * time.Second,
	}
	go func() {
		logger.Info("Balance server started", "address", cfg.Address, "database", cfg.DatabasePath)
		if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			logger.Error("server stopped", "error", err)
			os.Exit(1)
		}
	}()

	stop := make(chan os.Signal, 1)
	signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
	<-stop
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	if err := server.Shutdown(ctx); err != nil {
		logger.Error("graceful shutdown failed", "error", err)
	}
}