package main

import (
	"dal-license-server/internal/config"
	"dal-license-server/internal/handler"
	"dal-license-server/internal/repository"
	"dal-license-server/internal/router"
	"dal-license-server/internal/service"
	"database/sql"
	"fmt"
	"log"
	"net/http"
	"os"
	"strconv"

	_ "github.com/go-sql-driver/mysql"
)

func main() {
	cfg := config.Load()

	// Connect to MySQL
	db, err := sql.Open("mysql", cfg.DSN())
	if err != nil {
		log.Fatal("DB open: ", err)
	}
	defer db.Close()

	if err := db.Ping(); err != nil {
		log.Fatal("DB ping: ", err)
	}

	// Run migrations
	runMigrations(db)

	// Crypto service
	cryptoSvc, err := service.NewCryptoService(cfg.RSAPrivateKey)
	if err != nil {
		log.Fatal("Crypto: ", err)
	}

	// Repositories
	licenseRepo := repository.NewLicenseRepo(db)
	activationRepo := repository.NewActivationRepo(db)
	auditRepo := repository.NewAuditRepo(db)

	// Services
	licenseSvc := service.NewLicenseService(licenseRepo, auditRepo)
	activationSvc := service.NewActivationService(activationRepo, licenseRepo, auditRepo, cryptoSvc, licenseSvc)

	// Handlers
	clientHandler := handler.NewClientHandler(activationSvc)
	adminHandler := handler.NewAdminHandler(licenseSvc, activationSvc, auditRepo)
	dashboardHandler := handler.NewDashboardHandler(licenseSvc, activationSvc, auditRepo, "templates", cfg.AdminPassword)

	// Rate limits
	rlActivate, _ := strconv.Atoi(cfg.RateLimitActivate)
	if rlActivate == 0 {
		rlActivate = 10
	}
	rlValidate, _ := strconv.Atoi(cfg.RateLimitValidate)
	if rlValidate == 0 {
		rlValidate = 60
	}

	// Router
	mux := router.Setup(clientHandler, adminHandler, dashboardHandler, cfg.AdminAPIKey, rlActivate, rlValidate)

	addr := ":" + cfg.Port
	fmt.Printf("DAL License Server pokrenut na http://localhost%s\n", addr)
	if err := http.ListenAndServe(addr, mux); err != nil {
		log.Fatal(err)
	}
}

func runMigrations(db *sql.DB) {
	files := []string{"migrations/001_create_tables.sql", "migrations/002_seed_products.sql"}
	for _, f := range files {
		data, err := os.ReadFile(f)
		if err != nil {
			log.Printf("Migration %s: %v", f, err)
			continue
		}
		_, err = db.Exec(string(data))
		if err != nil {
			log.Printf("Migration %s: %v (may already exist)", f, err)
		}
	}
}