package main

import (
	"encoding/json"
	"fmt"
	"log"
	"net/http"
)

const (
	PORT = "8080"
)

func handleGetPing(w http.ResponseWriter, r *http.Request) {
	log.Printf("[*] Received request %v %v\n", r.Method, r.URL)
	fmt.Fprintf(w, "PONG\n")
}

func handlePostSubmit(w http.ResponseWriter, r *http.Request) {
	log.Printf("[*] Received request %v %v\n", r.Method, r.URL)
	log.Printf("[*] %v\n", r.Body)

	w.Header().Set("Access-Control-Allow-Origin", "*")
	w.Header().Set("Access-Control-Allow-Methods", "OPTIONS, GET, POST")
	w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Access-Control-Allow-Origin")

	var choices [][]bool

	err := json.NewDecoder(r.Body).Decode(&choices)
	if err != nil {
		log.Printf("[!] Error decoding request Body %v, error: %s\n", r.Body, err)
		w.WriteHeader(http.StatusBadRequest)
	}

	log.Printf("TODO: Persist to database %v\n", choices)

	w.WriteHeader(http.StatusOK)
}

func handleOptionsSubmit(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Access-Control-Allow-Origin", "*")
	w.Header().Set("Access-Control-Allow-Methods", "OPTIONS, GET, POST")
	w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Access-Control-Allow-Origin")
	w.WriteHeader(http.StatusNoContent)
}

func main() {
	http.HandleFunc(
		"GET /api/ping",
		handleGetPing,
	)

	http.HandleFunc(
		"POST /api/submit",
		handlePostSubmit,
	)

	http.HandleFunc(
		"OPTIONS /api/submit",
		handleOptionsSubmit,
	)

	log.Printf("[*] Datefinder server listening on :%s\n", PORT)
	if err := http.ListenAndServe(":8080", nil); err != nil {
		log.Fatalf("[!] Could not start server on %s, error: %s\n", PORT, err)
	}
}