package tasks

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

type EpicLinkTask struct{}

func (t *EpicLinkTask) Run() error {
	jsonContent, err := http.Get("https://api.egdata.app/free-games?country=US")
	if err != nil {
		return fmt.Errorf("failed fetching link")
	}
	defer jsonContent.Body.Close()

	var parsedJson []struct {
		ID        string `json:"id"`
		Namespace string `json:"namespace"`
		Title     string `json:"title"`
		Tags      []struct {
			ID   string `json:"id"`
			Name string `json:"name"`
		} `json:"tags"`
		Giveaway struct {
			ID        string    `json:"id"`
			Namespace string    `json:"namespace"`
			StartDate time.Time `json:"startDate"`
			EndDate   time.Time `json:"endDate"`
			Title     string    `json:"title"`
		} `json:"giveaway"`
	}
	decoder := json.NewDecoder(jsonContent.Body)
	if err := decoder.Decode(&parsedJson); err != nil {
		return fmt.Errorf("failed decoding JSON: %w", err)
	}

	offers := []*EpicOffer{}
	for _, item := range parsedJson {
		if item.Giveaway.StartDate.Before(time.Now()) {
			offer := &EpicOffer{
				Title:     item.Title,
				Namespace: item.Namespace,
				OfferId:   item.ID,
			}
			for _, tag := range item.Tags {
				switch tag.Name {
				case "Windows":
					offer.System = "PC"
					offers = append(offers, offer)
				case "iOS":
					offer.System = "iOS"
					offers = append(offers, offer)
				case "Android":
					offer.System = "Android"
					offers = append(offers, offer)
				}
			}
		}
	}

	allOffers := ""
	for _, offer := range offers {
		fmt.Printf("%s (%s):\n%s\n\n", offer.Title, offer.System, t.toOfferUrl(offer.ToOffer()))
		allOffers += offer.ToOffer() + "&"
	}
	allOffers = strings.TrimSuffix(allOffers, "&")
	fmt.Printf("All Offers:\n%s\n", t.toOfferUrl(allOffers))

	return nil
}

func (t *EpicLinkTask) toOfferUrl(offerString string) string {
	return fmt.Sprintf("https://store.epicgames.com/purchase?%s#/purchase/payment-methods", offerString)
}

type EpicOffer struct {
	Title     string
	System    string
	Namespace string
	OfferId   string
}

func (o *EpicOffer) ToOffer() string {
	return fmt.Sprintf("offers=1-%s-%s", o.Namespace, o.OfferId)
}