package meteo

import (
	"context"
	"errors"
	"fmt"
	"log/slog"
	"net/http"
	"sync"
	"time"

	"github.com/cenkalti/backoff/v5"
)

type inMemory struct {
	data   any
	mu     *sync.RWMutex
	expiry time.Time
}
type Service struct {
	inMemory
}

func NewService() *Service {
	return &Service{}
}

func (s *Service) GetWeatherByCity(ctx context.Context, params GetMeteoData) ([]MeteoData, error) {
	fromDate, err := time.Parse("2006-01-02", params.Date)
	if err != nil {
		return nil, err
	}
	toDate := fromDate.AddDate(0, 0, params.Days-1)

	operation := func() (*http.Response, error) {
		url := fmt.Sprintf("http://localhost:8080/data?city=%s&from=%s&to=%s",
			params.Location, params.Date, toDate.Format("2006-01-02"))

		resp, err := http.Get(url)
		if err != nil {
			return nil, err
		}
		defer resp.Body.Close()

		if resp.StatusCode == http.StatusBadRequest {
			return nil, backoff.Permanent(errors.New("bad request"))
		}

		return resp, nil
	}

	result, err := backoff.Retry(ctx, operation, backoff.WithBackOff(backoff.NewExponentialBackOff()))
	if err != nil {
		slog.Error("somethin happened")
		return []MeteoData{}, err
	}
	// TODO add ristretto

	slog.Info("fetched data", "data", result)

	return []MeteoData{}, nil
}