package main

import (
	"database/sql"
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"time"
)

type Handler struct {
	db   *sql.DB
	ntfy *Ntfy
}

func getStaticFile(relPath string, contentType string, w http.ResponseWriter) {
	file, err := os.ReadFile(relPath)
	if err != nil {
		w.WriteHeader(http.StatusInternalServerError)
		fmt.Fprintf(w, "%s", err.Error())
		return
	}

	w.Header().Add("Content-Type", contentType)
	w.WriteHeader(http.StatusOK)
	fmt.Printf("%s\n", w.Header().Get("Content-Type"))
	w.Write(file)
}

func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	fmt.Printf("%s - [%s] (%s) %s\n", time.Now().Format(time.RFC3339), r.RemoteAddr, r.Method, r.URL)

	switch true {
	case r.Method == "GET" && r.URL.Path == "/":
		getStaticFile("../client/index.html", "text/html", w)

	case r.Method == "GET" && r.URL.Path == "/rsvp":
		getStaticFile("../client/rsvp.html", "text/html", w)

	case r.Method == "GET" && r.URL.Path == "/index.js":
		getStaticFile("../client/index.js", "text/javascript", w)

	case r.Method == "GET" && r.URL.Path == "/style.css":
		getStaticFile("../client/style.css", "text/css", w)

	case r.Method == "GET" && r.URL.Path == "/api/rsvps":
		rsvps, err := GetRsvps(h.db)
		if err != nil {
			w.WriteHeader(http.StatusInternalServerError)
			fmt.Fprintf(w, "%s", err.Error())
			return
		}

		w.WriteHeader(http.StatusOK)
		fmt.Fprintf(w, "%#v", rsvps)

	case r.Method == "POST" && r.URL.Path == "/api/rsvps":
		var rsvp Rsvp

		err := json.NewDecoder(r.Body).Decode(&rsvp)

		if err != nil {
			fmt.Println(err)
			w.WriteHeader(http.StatusInternalServerError)
			return
		}

		_, err = rsvp.CreateRsvp(h.db)
		fmt.Printf("%#v\n", rsvp)

		if err != nil {
			fmt.Println(err)
			w.WriteHeader(http.StatusInternalServerError)
			return
		}

		if h.ntfy != nil {
			SendRsvpNotification(h.ntfy, &rsvp)
		}
		w.WriteHeader(http.StatusAccepted)
	default:
		w.WriteHeader(http.StatusNotFound)
	}
}