package config

import (
	"os"
	"strconv"
	"time"
)

type Config struct {
	DatabaseURL          string
	Port                 string
	Env                  string
	OpenFIGIKey          string
	CoinGeckoKey         string
	PriceFetchInterval   time.Duration
	PriceCleanInterval   time.Duration
	SnapshotHorizonDays  int // nombre de jours dans le futur couverts par les snapshots
}

func Load() *Config {
	fetchInterval, err := time.ParseDuration(getenv("PRICE_FETCH_INTERVAL", "1h"))
	if err != nil {
		fetchInterval = time.Hour
	}

	horizonDays, err := strconv.Atoi(getenv("SNAPSHOT_HORIZON_DAYS", "30"))
	if err != nil || horizonDays < 0 {
		horizonDays = 30
	}

	return &Config{
		DatabaseURL:         getenv("DATABASE_URL", "postgres://account:account@localhost:5432/account?sslmode=disable"),
		Port:                getenv("PORT", "8080"),
		Env:                 getenv("ENV", "development"),
		OpenFIGIKey:         os.Getenv("OPENFIGI_API_KEY"),
		CoinGeckoKey:        os.Getenv("COINGECKO_API_KEY"),
		PriceFetchInterval:  fetchInterval,
		PriceCleanInterval:  24 * time.Hour,
		SnapshotHorizonDays: horizonDays,
	}
}

func getenv(key, fallback string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return fallback
}