package main

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

func GetUpdate(controllerURL string, timeoutSec int) (int64, error) {
	client := &http.Client{Timeout: time.Duration(timeoutSec) * time.Second}
	resp, err := client.Get(controllerURL + "/update")
	if err != nil {
		return 0, err
	}
	defer resp.Body.Close()
	if resp.StatusCode != 200 {
		return 0, fmt.Errorf("unexpected status: %d", resp.StatusCode)
	}
	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return 0, err
	}
	var ts int64
	if err := json.Unmarshal(body, &ts); err != nil {
		return 0, err
	}
	return ts, nil
}

func GetSubnets(controllerURL string, timeoutSec int) ([]string, error) {
	client := &http.Client{Timeout: time.Duration(timeoutSec) * time.Second}
	resp, err := client.Get(controllerURL + "/subnets")
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	if resp.StatusCode != 200 {
		return nil, fmt.Errorf("unexpected status: %d", resp.StatusCode)
	}
	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, err
	}
	var subnets []string
	if err := json.Unmarshal(body, &subnets); err != nil {
		return nil, err
	}
	return subnets, nil
}