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package main
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import (
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	"log"
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	"net/http"
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	"os"
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	"time"
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	"github.com/go-chi/chi/v5"
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	"github.com/go-chi/chi/v5/middleware"
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)
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/* @gitian
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 * --group=core
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 * Entry point — sets up the chi router with middleware and
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 * starts the HTTP server. Port defaults to 8080 but can be
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 * overridden with the PORT environment variable.
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 */
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func main() {
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	r := chi.NewRouter()
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	// @gitian:note Middleware order matters — logger must wrap the recovery handler
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	r.Use(middleware.Logger)
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	r.Use(middleware.Recoverer)
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	r.Use(middleware.Timeout(30 * time.Second))
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	store := NewStore()
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	h := NewHandler(store)
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	/* @gitian
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	 * --group=api
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	 * Route table — RESTful CRUD for todos. All routes are
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	 * prefixed under /api/v1 for versioning.
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	 */
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	r.Route("/api/v1", func(r chi.Router) {
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		r.Get("/todos", h.List)
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		r.Post("/todos", h.Create)
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		r.Get("/todos/{id}", h.Get)
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		r.Put("/todos/{id}", h.Update)
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		r.Delete("/todos/{id}", h.Delete)
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	})
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	// @gitian:todo Add /health endpoint for container readiness probes
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	// @gitian:todo Add graceful shutdown with signal handling
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	port := os.Getenv("PORT")
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	if port == "" {
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		port = "8080"
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	}
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	log.Printf("listening on :%s", port)
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	log.Fatal(http.ListenAndServe(":"+port, r))
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}
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