package utils

import (
	"encoding/json"
	"encoding/xml"
	"fmt"
	"io"
	"log"
	"net/http"
	"os"
	"reflect"
	"strings"
	"time"
)

func Ptr[T any](v T) *T { return &v }

func MakeUppercase(s string) string {
	if s != "" && reflect.TypeOf(s).Kind() == reflect.String && len(s) > 0 {
		return strings.ToUpper(string(s[0])) + s[1:]
	}
	return ""
}

func fetchXML(url string) ([]byte, error) {
	resp, err := http.Get(url)
	if err != nil {
		return []byte{}, fmt.Errorf("GET error: %v", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return []byte{}, fmt.Errorf("status error: %v", resp.StatusCode)
	}

	data, err := io.ReadAll(resp.Body)
	if err != nil {
		return []byte{}, fmt.Errorf("read body: %v", err)
	}

	return data, nil
}

func GetXMLFromFile[T any](filePath string) (T, error) {
	var result T
	xmlFile, err := os.Open(filePath)
	if err != nil {
		return result, fmt.Errorf("failed to open file: %w", err)
	}
	defer xmlFile.Close()

	byteValue, err := io.ReadAll(xmlFile)
	if err != nil {
		return result, fmt.Errorf("failed to read file: %w", err)
	}
	err = xml.Unmarshal(byteValue, &result)
	if err != nil {
		return result, fmt.Errorf("failed to unmarshal XML: %w", err)
	}
	return result, nil
}

func GetDataXML[T any](url string) (T, error) {
	var result T
	client := &http.Client{
		Timeout: 30 * time.Second,
	}

	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		return result, fmt.Errorf("failed to create request: %w", err)
	}

	// Add browser-like headers to avoid 403
	req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36")
	req.Header.Set("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8")
	req.Header.Set("Accept-Language", "en-US,en;q=0.9,it;q=0.8")
	req.Header.Set("Accept-Encoding", "gzip, deflate")
	req.Header.Set("Connection", "keep-alive")
	req.Header.Set("Referer", "https://www.miogest.com/")

	resp, err := client.Do(req)
	log.Printf("Response Status: %s", resp.Status)
	if jsonBytes, err := json.MarshalIndent(resp.Header, "", "  "); err == nil {
		log.Printf("Headers:\n%s", string(jsonBytes))
	}
	if err != nil {

		return result, fmt.Errorf("Failed to fetch url %s: %w", url, err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {

		log.Printf("Fetch XML error: status error: %d", resp.StatusCode)
		return result, fmt.Errorf("Failed to fetch url %s: status error: %d", url, resp.StatusCode)
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return result, fmt.Errorf("failed to read response: %w", err)
	}

	err = xml.Unmarshal(body, &result)
	if err != nil {
		return result, fmt.Errorf("failed to unmarshal XML: %w", err)
	}
	return result, nil
}

func SafeRemoveAll(path string) error {
	err := os.RemoveAll(path)
	if err != nil {
		if os.IsNotExist(err) {
			return nil
		}
		return err
	}
	return nil
}

func GetStringValue(strPtr *string) string {
	if strPtr != nil {
		return *strPtr
	}
	return ""
}
func RemoveWhitespace(str string) string {
	return strings.ReplaceAll(str, " ", "")
}

func CommaToDot(str *string) *string {
	if str != nil {
		result := strings.ReplaceAll(*str, ",", ".")
		return &result
	}
	return nil
}