package main

import (
	"fmt"
	"log"
	"net/http"
	"runtime"

	viper "github.com/spf13/viper"
)

var (
	appID               = "gdq-vod-bot"
	appName             = "Icedream's GamesDoneQuick VoD Bot"
	appVersion          = "dev"
	redditOwnerUsername = "icedream2k9"
)

type config struct {
	ID  string
	URL string
}

func setUserAgent(inner http.RoundTripper, userAgent string) http.RoundTripper {
	return &addUGA{
		inner: inner,
		Agent: userAgent,
	}
}

type addUGA struct {
	inner http.RoundTripper
	Agent string
}

func (ug *addUGA) RoundTrip(r *http.Request) (*http.Response, error) {
	r.Header.Set("User-Agent", ug.Agent)
	return ug.inner.RoundTrip(r)
}

func main() {
	vodID := "agdq2020vods"

	viper.SetDefault("ID", vodID)
	viper.SetDefault("URL", "https://www.reddit.com/r/VODThread/wiki/"+vodID+".json")

	c := new(config)
	viper.Unmarshal(c)

	userAgent := fmt.Sprintf(
		"%s:%s:%s %s (by /u/%s)",
		runtime.GOOS,
		appID,
		appName,
		appVersion,
		redditOwnerUsername)
	redditHTTPClient := &http.Client{
		Transport: setUserAgent(http.DefaultTransport, userAgent),
	}

	videosJSONResponse, err := redditHTTPClient.Get("")
	if err != nil {
		log.Fatal(err)
	}
	defer videosJSONResponse.Body.Close()
	if videosJSONResponse.StatusCode != http.StatusOK {
		log.Fatal(videosJSONResponse.Status)
		return
	}
}