package main

import (
	"fmt"
	"github.com/eslider/superherohub/internal/router"
	"github.com/eslider/superherohub/pkg/deesee/storage"
	"github.com/eslider/superherohub/pkg/file"
	"log"
	"net/http"
	"os"
	"strconv"
	"time"
)

// main is the entry point of the application
func main() {
	var (
		dataPath = "data/heros.json" // Path to read superheros from JSON file
		port     = 8080              // Port to serve
		key      = 5                 // Json encryption key
		logger   = log.Default()     // Logger
		err      error               // Error
	)

	// Get port from environment variable
	if os.Getenv("PORT") != "" {
		port, err = strconv.Atoi(os.Getenv("PORT"))
		if err != nil {
			logger.Fatalf("Invalid port number: %s", err.Error())
		}
		if port < 1 || port > 65535 {
			logger.Print("Port number must be between 1 and 65535")
			logger.Fatalf("Invalid port number : %d", port)
		}
	}

	// Get key from environment variable
	if os.Getenv("KEY") != "" {
		key, err = strconv.Atoi(os.Getenv("KEY"))
		if err != nil {
			logger.Fatalf("Invalid key: %s", err.Error())
		}
	}

	// Get data path from environment variable
	if os.Getenv("DATA_PATH") != "" {
		dataPath = os.Getenv("DATA_PATH")
	}

	// Check if data path exists
	if !file.IsExist(dataPath) {
		logger.Fatalf("Invalid data path: %s", dataPath)
	}

	// Create Json storage
	s, err := storage.NewJson(dataPath)
	if err != nil {
		logger.Fatalf("Invalid data format: %s", dataPath)
	}

	// Create a new server
	srv := &http.Server{
		Addr:         fmt.Sprintf(":%d", port), // Define port and address to serve
		Handler:      router.New(s, key, logger).GetHandler(),
		ErrorLog:     logger,
		ReadTimeout:  240 * time.Second, // Good practice: enforcing timeouts for serving.
		WriteTimeout: 240 * time.Second, // Good practice: enforcing timeouts for serving.
	}

	// Log info
	logger.Printf("Serving on port %d", port)

	// Serve and handle error
	if err := srv.ListenAndServe(); err != nil {
		logger.Fatal(err)
	}
}