package egressutil

import (
	"context"
	"fmt"
	"io"
	"net/http"
	"strings"
	"time"
)

func HTTPGetBody(client *http.Client, rawURL string, timeout time.Duration, userAgent string, maxBytes int64) (string, error) {
	if client == nil {
		return "", fmt.Errorf("http client is nil")
	}
	limit := maxBytes
	if limit <= 0 {
		limit = 8 * 1024
	}

	ctx, cancel := context.WithTimeout(context.Background(), timeout)
	defer cancel()

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, rawURL, nil)
	if err != nil {
		return "", err
	}
	if strings.TrimSpace(userAgent) != "" {
		req.Header.Set("User-Agent", strings.TrimSpace(userAgent))
	}
	req.Header.Set("Accept", "application/json, text/plain, */*")

	resp, err := client.Do(req)
	if err != nil {
		return "", err
	}
	defer resp.Body.Close()

	body, _ := io.ReadAll(io.LimitReader(resp.Body, limit))
	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		msg := strings.TrimSpace(string(body))
		if msg == "" {
			msg = resp.Status
		}
		return "", fmt.Errorf("%s -> %s", rawURL, msg)
	}
	return string(body), nil
}