package httpapi

import (
	"encoding/json"
	"net/http"
	"strings"
	"time"

	"github.com/go-chi/chi/v5"

	"github.com/benya/temporserv/internal/auth"
	"github.com/benya/temporserv/internal/config"
	"github.com/benya/temporserv/internal/library"
	"github.com/benya/temporserv/internal/subsonic"
)

func NewRouter(cfg config.Config) http.Handler {
	r := chi.NewRouter()
	r.Use(requestLogger)
	r.Use(recoverer)
	r.Use(cors(cfg.CORSOrigins))

	r.Get("/health", func(w http.ResponseWriter, r *http.Request) {
		writeJSON(w, http.StatusOK, map[string]any{
			"status": "ok",
			"time":   time.Now().UTC(),
			"env":    cfg.AppEnv,
		})
	})

	r.Route("/api", func(api chi.Router) {
		api.Get("/me", func(w http.ResponseWriter, r *http.Request) {
			writeJSON(w, http.StatusOK, auth.DemoUser())
		})
		api.Get("/home", func(w http.ResponseWriter, r *http.Request) {
			writeJSON(w, http.StatusOK, library.DemoHome())
		})
		api.Get("/tracks", func(w http.ResponseWriter, r *http.Request) {
			writeJSON(w, http.StatusOK, map[string]any{
				"items": library.DemoTracks(),
			})
		})
		api.Post("/auth/login", func(w http.ResponseWriter, r *http.Request) {
			writeJSON(w, http.StatusOK, map[string]any{
				"token": "dev-token",
				"user":  auth.DemoUser(),
			})
		})
	})

	r.Route("/rest", func(rest chi.Router) {
		rest.Get("/ping.view", func(w http.ResponseWriter, r *http.Request) {
			writeJSON(w, http.StatusOK, subsonic.PingResponse())
		})
		rest.Get("/getLicense.view", func(w http.ResponseWriter, r *http.Request) {
			writeJSON(w, http.StatusOK, subsonic.PingResponse())
		})
	})

	fs := http.FileServer(http.Dir("./web"))
	r.Handle("/*", spaFallback(fs))

	return r
}

func writeJSON(w http.ResponseWriter, status int, payload any) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(status)
	_ = json.NewEncoder(w).Encode(payload)
}

func spaFallback(next http.Handler) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		if strings.HasPrefix(r.URL.Path, "/api") || strings.HasPrefix(r.URL.Path, "/rest") || strings.HasPrefix(r.URL.Path, "/health") {
			http.NotFound(w, r)
			return
		}
		next.ServeHTTP(w, r)
	}
}