package main

import (
	"log"
	"os"
	"strconv"
	"strings"

	"AbstractWizard/audit"
	"AbstractWizard/server"
)

func main() {
	cfg := server.AppConfig{
		ConfigDir:   envOrDefault("CONFIG_DIR", "/config"),
		ListenAddr:  envOrDefault("LISTEN_ADDR", "127.0.0.1:8080"),
		MaxBackups:  envOrDefaultInt("MAX_BACKUPS", 10),
		CORSOrigins: parseCSV(os.Getenv("CORS_ORIGINS")),
	}

	if err := os.MkdirAll(cfg.ConfigDir, 0o755); err != nil {
		log.Fatalf("failed to create config directory %s: %v", cfg.ConfigDir, err)
	}

	auditLog := audit.NewLogger()
	srv := server.New(cfg, auditLog)

	log.Printf("config_dir=%s listen_addr=%s max_backups=%d cors_origins=%v",
		cfg.ConfigDir, cfg.ListenAddr, cfg.MaxBackups, cfg.CORSOrigins)

	if err := srv.ListenAndServe(); err != nil {
		log.Fatalf("server error: %v", err)
	}
}

func envOrDefault(key, defaultVal string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return defaultVal
}

func envOrDefaultInt(key string, defaultVal int) int {
	v := os.Getenv(key)
	if v == "" {
		return defaultVal
	}
	n, err := strconv.Atoi(v)
	if err != nil {
		log.Printf("warning: invalid %s=%q, using default %d", key, v, defaultVal)
		return defaultVal
	}
	return n
}

func parseCSV(s string) []string {
	if s == "" {
		return nil
	}
	parts := strings.Split(s, ",")
	result := make([]string, 0, len(parts))
	for _, p := range parts {
		p = strings.TrimSpace(p)
		if p != "" {
			result = append(result, p)
		}
	}
	return result
}