package tacitus

import (
	"github.com/shopspring/decimal"

	"strings"
	"time"
)

var PRODUCTS = [...]string{"BTC-USD", "ETH-USD"}

type Trade struct {
	Id        int             `json:"-"`
	TradeId   int             `json:"trade_id,"`
	Product   string          `json:"product,"`
	Price     decimal.Decimal `json:"price,"`
	Size      decimal.Decimal `json:"size,"`
	Buy       bool            `json:"buy,"`
	Sell      bool            `json:"sell,"`
	Timestamp time.Time       `json:"timestamp,"`
}

type TradeService interface {
	CreateTrade(t Trade) (Trade, error)
	DeleteTrade(id int)

	Trade(id int) (Trade, error)
	TradeByTradeId(id int, prod string) (Trade, error)
	TradesInDateRange(product string, start, end time.Time) ([]Trade, error)
	FirstTrades(product string, limit int) ([]Trade, error)
	LastTrades(product string, limit int) ([]Trade, error)
	TradesAfter(product string, id, limit int) ([]Trade, error)
	TradesBefore(product string, id, limit int) ([]Trade, error)

	TradesAfterAll(product string, id int) (Results, error)
	TradesWhereResults(sql string, params ...interface{}) (Results, error)
}

func ValidProduct(prod string) bool {
	prod = strings.ToUpper(prod)
	for _, p := range PRODUCTS {
		if p == prod {
			return true
		}
	}

	return false
}