package gosdk

import (
	"bytes"
	"encoding/json"
	"io"
	"net/http"
)

// ── Type Definitions ─────────────────────────────────────────────
type Configuration struct {
	BackendUrl    string
	Secret        string
	ServiceId     string
	BypassingUids []string
	UseStubs      bool
	StubsDefault  bool
}

type requestBody struct {
	Secret      string `json:"signingSecret"`
	ServiceId   string `json:"name"`
	Uid         string `json:"uid"`
	ProductId   string `json:"productID"`
	ProductType string `json:"type"`
}

// ── Globals ──────────────────────────────────────────────────────
var conf *Configuration
var usingStubs bool
var failCountSinceLastSuccess int

// ── Functions ────────────────────────────────────────────────────

// Initialize the SDK, specifying the configuration
func Init(config Configuration) {
	conf = &config
	usingStubs = false
	failCountSinceLastSuccess = 0
}

// Check if a given users owns a product. Make sure to always
func CheckOwned(uid string, productId string, productType string) bool {
	if conf == nil {
		panic("CheckOwned called prior to Store SDK initialization")
	}

	if usingStubs || conf.UseStubs {
		return conf.StubsDefault
	}

	// Bypass check
	for _, v := range conf.BypassingUids {
		if v == uid {
			return true
		}
	}

	// Create request
	data, err := json.Marshal(requestBody{
		Secret:      conf.Secret,
		ServiceId:   conf.ServiceId,
		Uid:         uid,
		ProductId:   productId,
		ProductType: productType,
	})
	if err != nil {
		return false
	}

	res, err := http.Post(conf.BackendUrl+"/sdk/api/check", "application/json", bytes.NewBuffer(data))
	if err != nil {
		if failCountSinceLastSuccess > 10 {
			usingStubs = true
		}
		failCountSinceLastSuccess += 1
		return false
	}
	failCountSinceLastSuccess = 0

	body, err := io.ReadAll(res.Body)
	if err != nil {
		return false
	}
	return string(body) == "true"
}