package sync

import (
	"bytes"
	"context"
	"fmt"
	"io"
	"net/http"
	"os"
	"time"
)

// Upload posts the raw playersDB.json bytes to endpoint with X-API-Key and Content-Type: application/json.
func Upload(ctx context.Context, client *http.Client, endpoint, apiKey string, body []byte) error {
	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint, bytes.NewReader(body))
	if err != nil {
		return err
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("X-API-Key", apiKey)

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

	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		snippet, _ := io.ReadAll(io.LimitReader(resp.Body, 2048))
		return fmt.Errorf("HTTP %d: %s", resp.StatusCode, bytes.TrimSpace(snippet))
	}
	_, _ = io.Copy(io.Discard, resp.Body)
	return nil
}

// ReadPlayersDB reads the file from disk.
func ReadPlayersDB(path string) ([]byte, error) {
	return os.ReadFile(path)
}

// NewHTTPClient returns a client suitable for large JSON uploads.
func NewHTTPClient() *http.Client {
	return &http.Client{
		Timeout: 90 * time.Second,
	}
}