package main

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"os"
	"strings"
)

// ================== Util ==================

func mustMkdirAll(dir string) error { return os.MkdirAll(dir, 0o755) }

func sanitize(s string) string {
	return strings.ReplaceAll(strings.ReplaceAll(s, "\n", " "), "\r", " ")
}

func httpGet(ctx context.Context, url string) ([]byte, error) {
	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
	if err != nil {
		return nil, err
	}
	req.Header.Set("User-Agent", "eth-btc-daemon/1.0")
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	if resp.StatusCode/100 != 2 {
		b, _ := io.ReadAll(resp.Body)
		return nil, fmt.Errorf("status %d dal server; body: %s", resp.StatusCode, string(b))
	}
	return io.ReadAll(resp.Body)
}

func httpGetJSON(ctx context.Context, url string, dst any) error {
	b, err := httpGet(ctx, url)
	if err != nil {
		return err
	}
	return json.Unmarshal(b, dst)
}