package main

import (
	"encoding/json"
	"fmt"
	"io"
	"log/slog"
	"net"
	"net/http"
	"os"
	"text/template"

	"github.com/joho/godotenv"
)

type ipResponse struct {
	IP            string `json:"ip"`
	Asn           string `json:"asn"`
	AsName        string `json:"as_name"`
	AsDomain      string `json:"as_domain"`
	CountryCode   string `json:"country_code"`
	Country       string `json:"country"`
	ContinentCode string `json:"continent_code"`
	Continent     string `json:"continent"`
}

type IPInfo struct {
	Query       string  `json:"query"`
	Status      string  `json:"status"`
	Country     string  `json:"country"`
	CountryCode string  `json:"countryCode"`
	Region      string  `json:"region"`
	RegionName  string  `json:"regionName"`
	City        string  `json:"city"`
	Zip         string  `json:"zip"`
	Lat         float64 `json:"lat"`
	Lon         float64 `json:"lon"`
	Timezone    string  `json:"timezone"`
	ISP         string  `json:"isp"`
	Org         string  `json:"org"`
	AS          string  `json:"as"`
}

type TemolateData struct {
	Ip  ipResponse
	IP2 IPInfo
}

func main() {
	mux := http.NewServeMux()

	godotenv.Load()

	// routes
	mux.HandleFunc("/", handleRoot)
	mux.HandleFunc("/robots.txt", serveRobots)
	mux.HandleFunc("/*", handleRoot)

	mux.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("static"))))

	fmt.Println("listening on 8080")
	http.ListenAndServe(":8080", mux)
}

// Routes
func handleRoot(w http.ResponseWriter, r *http.Request) {
	templ, err := template.ParseFiles("templates/home.html")
	if err != nil {
		http.Error(w, "template not found", http.StatusInternalServerError)
		return
	}

	host := r.Header.Get("CF-Connecting-IP")
	if host == "" {
		host = r.Header.Get("X-Real-IP")
	}
	if host == "" {
		host = r.Header.Get("X-Forwarded-For")
	}
	if host == "" {
		host, _, _ = net.SplitHostPort(r.RemoteAddr)
	}

	dox := callApi(host)
	dox2 := secondApi(host)

	templ.Execute(w, TemolateData{Ip: dox, IP2: *dox2})
}

func serveRobots(w http.ResponseWriter, r *http.Request) {
	http.ServeFile(w, r, ("templates/robots.txt"))
}

// utils
func callApi(ip string) ipResponse {
	api := os.Getenv("IPAPI")

	slog.Info("client called", "ip", ip)

	var values ipResponse

	if api == " " {
		slog.Error("No api provided")
		return values
	}

	url := fmt.Sprintf("https://api.ipinfo.io/lite/%s?token=%s", ip, api)

	request, err := http.Get(url)
	if err != nil {
		slog.Error("callApi Error")
		return values
	}
	defer request.Body.Close()

	body, _ := io.ReadAll(request.Body)

	err = json.Unmarshal(body, &values)

	return values
}

func secondApi(ip string) *IPInfo {
	url := fmt.Sprintf("http://ip-api.com/json/%s", ip)

	var res IPInfo

	response, err := http.Get(url)
	if err != nil {
		slog.Error("secondApi err")
		return &res
	}
	defer response.Body.Close()

	body, _ := io.ReadAll(response.Body)

	json.Unmarshal(body, &res)

	slog.Debug("secondApi", "city", res.City, "lat", res.Lat, "lon", res.Lon, "status", res.Status)

	return &res
}