main.go

package main

import (
	"context"
	"database/sql"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/asifrahaman13/laughing-guide/src/config"
	"github.com/asifrahaman13/laughing-guide/src/core/service"
	"github.com/asifrahaman13/laughing-guide/src/database"
	"github.com/asifrahaman13/laughing-guide/src/handler"
	"github.com/asifrahaman13/laughing-guide/src/repository"
	"github.com/asifrahaman13/laughing-guide/src/routers"
	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/s3"
	"github.com/confluentinc/confluent-kafka-go/v2/kafka"
	"github.com/gin-contrib/cors"
	"github.com/gin-gonic/gin"
	_ "github.com/lib/pq"
)

func main() {
	database.InitDB()

	cfg, err := config.LoadConfig()
	if err != nil {
		log.Fatalf("Error loading config: %v", err)
	}

	if cfg.GinMode == "" {
		cfg.GinMode = "debug"
	}
	if cfg.GinMode == "release" {
		gin.SetMode(gin.ReleaseMode)
	} else {
		gin.SetMode(gin.DebugMode)
	}

	databaseURL := fmt.Sprintf("postgres://%s:%s@%s:%s/%s?sslmode=%s", cfg.DBUser, cfg.DBPassword, cfg.DBHost, cfg.DBPort, cfg.DBName, cfg.DBSSLMode)
	db, err := sql.Open("postgres", databaseURL)
	if err != nil {
		log.Fatal(err)
	}

	sess := session.Must(session.NewSession(&aws.Config{
		Region: aws.String(cfg.AwsRegion),
	}))
	s3Client := s3.New(sess)

	kafkaClient, err := kafka.NewProducer(&kafka.ConfigMap{"bootstrap.servers": "kafka:9092"})
	if err != nil {
		log.Fatalf("Error creating Kafka client: %v", err)
	}
	kafkaRepo := repository.NewKafkaRepository(kafkaClient)

	employeeRepo := repository.NewDatabaseRepository(db)
	organizationRepo := repository.NewDatabaseRepository(db)
	awsRepo := repository.NewAwsRepository(s3Client)

	employeeService := service.NewEmployeeService(employeeRepo)
	organizationService := service.NewOrganizationService(organizationRepo, kafkaRepo)
	fileService := service.NewFileService(employeeRepo, awsRepo)

	employeeHandler := handler.NewEmployeeHandler(employeeService)
	organizationHandler := handler.NewOrganizationHandler(organizationService)
	fileHandler := handler.NewFileHandler(fileService)

	r := gin.Default()
	r.Use(cors.New(cors.Config{
		AllowOrigins:     []string{"*"},
		AllowMethods:     []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
		AllowHeaders:     []string{"Origin", "Content-Type", "Authorization"},
		ExposeHeaders:    []string{"Content-Length"},
		AllowCredentials: true,
		MaxAge:           12 * time.Hour,
	}))

	routers.InitRoutes(employeeHandler, fileHandler, organizationHandler, r)

	go func() {
		kafkaRepo.ConsumeMessage("payroll")
	}()

	srv := &http.Server{
		Addr:    ":" + cfg.Port,
		Handler: r,
	}

	go func() {
		log.Println("Server started on :" + cfg.Port)
		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("Failed to start server: %v", err)
		}
	}()

	c := make(chan os.Signal, 1)
	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
	<-c
	log.Println("Shutting down server...")

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	if err := srv.Shutdown(ctx); err != nil {
		log.Fatalf("Server forced to shutdown: %v", err)
	}

	log.Println("Server exited successfully")
}