package api

import (
	"fmt"
	"io"
	"net/http"

	"github.com/klauspost/compress/gzip"

	"openreplay/backend/pkg/logger"
)

func ReadBody(log logger.Logger, w http.ResponseWriter, r *http.Request, limit int64) ([]byte, error) {
	body := http.MaxBytesReader(w, r.Body, limit)
	bodyBytes, err := io.ReadAll(body)

	// Close body
	if closeErr := body.Close(); closeErr != nil {
		log.Warn(r.Context(), "error while closing request body: %s", closeErr)
	}
	if err != nil {
		return nil, err
	}
	return bodyBytes, nil
}

func ReadCompressedBody(log logger.Logger, w http.ResponseWriter, r *http.Request, limit int64) ([]byte, error) {
	body := http.MaxBytesReader(w, r.Body, limit)
	var (
		bodyBytes []byte
		err       error
	)

	// Check if body is gzipped and decompress it
	if r.Header.Get("Content-Encoding") == "gzip" {
		reader, err := gzip.NewReader(body)
		if err != nil {
			return nil, fmt.Errorf("can't create gzip reader: %s", err)
		}
		bodyBytes, err = io.ReadAll(reader)
		if err != nil {
			return nil, fmt.Errorf("can't read gzip body: %s", err)
		}
		if err := reader.Close(); err != nil {
			log.Warn(r.Context(), "can't close gzip reader: %s", err)
		}
	} else {
		bodyBytes, err = io.ReadAll(body)
	}

	// Close body
	if closeErr := body.Close(); closeErr != nil {
		log.Warn(r.Context(), "error while closing request body: %s", closeErr)
	}
	if err != nil {
		return nil, err
	}
	return bodyBytes, nil
}