package main

import (
	"flag"
	"log"
	"net/http"
	"os"
	"path/filepath"

	"technical.kiwi/website/internal/gallery"
	"technical.kiwi/website/internal/handlers"
	"technical.kiwi/website/internal/mail"
	"technical.kiwi/website/internal/middleware"
)

func main() {
	thumbsOnly := flag.Bool("thumbs", false, "generate gallery thumbnails and exit")
	flag.Parse()

	root, err := os.Getwd()
	if err != nil {
		log.Fatal(err)
	}

	imagesDir := filepath.Join(root, "images")
	staticDir := filepath.Join(root, "static")

	if *thumbsOnly {
		if err := gallery.EnsureThumbnails(imagesDir); err != nil {
			log.Fatal(err)
		}
		log.Print("thumbnails generated")
		return
	}

	var mailCfg *mail.Config
	if mail.Enabled() {
		cfg, err := mail.Load()
		if err != nil {
			log.Fatalf("smtp config: %v", err)
		}
		mailCfg = &cfg
		log.Printf("contact form: smtp relay %s:%d → %s", cfg.Host, cfg.Port, cfg.To)
	} else {
		log.Print("contact form: disabled (set SMTP_HOST, SMTP_FROM, SMTP_TO to enable)")
	}

	srv, err := handlers.New(imagesDir, staticDir, mailCfg)
	if err != nil {
		log.Fatal(err)
	}

	mux := http.NewServeMux()
	srv.RegisterRoutes(mux)

	addr := envOr("ADDR", ":8080")
	log.Printf("Technical Kiwi website listening on %s", addr)
	if err := http.ListenAndServe(addr, middleware.Gzip(mux)); err != nil {
		log.Fatal(err)
	}
}

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