package config

import (
	"time"

	"github.com/ilyakaznacheev/cleanenv"
)

type Config struct {
	App       App       `yaml:"app"`
	HTTP      HTTP      `yaml:"http"`
	Binance   Binance   `yaml:"binance"`
	Postgres  Postgres  `yaml:"postgres"`
	Collector Collector `yaml:"collector"`
}

type App struct {
	Name string `yaml:"name" env:"APP_NAME" env-default:"crypto-hermes-gateway"`
	Env  string `yaml:"env"  env:"APP_ENV"  env-default:"local"`
	Port int    `yaml:"port" env:"APP_PORT" env-default:"8080"`
}

type HTTP struct {
	ReadTimeout  time.Duration `yaml:"read_timeout"  env-default:"5s"`
	WriteTimeout time.Duration `yaml:"write_timeout" env-default:"10s"`
	IdleTimeout  time.Duration `yaml:"idle_timeout"  env-default:"60s"`
}

type Binance struct {
	BaseURL    string        `yaml:"base_url"    env:"BINANCE_BASE_URL" env-default:"https://fapi.binance.com"`
	Timeout    time.Duration `yaml:"timeout"     env-default:"10s"`
	RetryCount int           `yaml:"retry_count" env-default:"2"`
	RPS        float64       `yaml:"rps"         env-default:"20"`
	Burst      int           `yaml:"burst"       env-default:"40"`
}

type Postgres struct {
	DSN      string `yaml:"dsn"       env:"POSTGRES_DSN" env-required:"true"`
	MaxConns int32  `yaml:"max_conns" env-default:"10"`
	MinConns int32  `yaml:"min_conns" env-default:"2"`
}

type Collector struct {
	Enabled      bool     `yaml:"enabled"       env-default:"true"`
	Symbols      []string `yaml:"symbols"       env-default:"BTCUSDT,ETHUSDT,SOLUSDT,BNBUSDT,DOGEUSDT"`
	Intervals    []string `yaml:"intervals"     env-default:"15m,1h,4h,1d,1w"`
	DefaultLimit int      `yaml:"default_limit" env-default:"500"`
}

func Load(path string) (*Config, error) {
	var cfg Config
	if path != "" {
		if err := cleanenv.ReadConfig(path, &cfg); err != nil {
			return nil, err
		}
	} else {
		if err := cleanenv.ReadEnv(&cfg); err != nil {
			return nil, err
		}
	}
	return &cfg, nil
}