{-# LANGUAGE DataKinds     #-}
{-# LANGUAGE TypeOperators #-}

module CoinbasePro.Unauthenticated.API
    ( products
    , aggregateOrderBook
    , fullOrderBook
    , trades
    , candles
    , stats
    , time
    ) where

import           Data.Proxy                                (Proxy (..))
import           Data.Time.Clock                           (UTCTime)
import           Servant.API                               ((:<|>) (..), (:>),
                                                            Capture, QueryParam,
                                                            QueryParam',
                                                            Required)
import           Servant.Client                            (client)

import           CoinbasePro.MarketData.AggregateOrderBook (AggregateOrderBook)
import           CoinbasePro.MarketData.FullOrderBook      (FullOrderBook)
import           CoinbasePro.MarketData.Types              (AggregateBookLevel (..),
                                                            CBTime,
                                                            FullBookLevel (..),
                                                            Product, Trade)
import           CoinbasePro.Request                       (CBGet, CBRequest)
import           CoinbasePro.Types                         (Candle,
                                                            CandleGranularity,
                                                            ProductId,
                                                            TwentyFourHourStats)


type Products = "products" :> CBGet [Product]

type ProductAggregateOrderBook = "products"
                               :> Capture "product" ProductId
                               :> "book"
                               :> QueryParam "level" AggregateBookLevel
                               :> CBGet AggregateOrderBook

type ProductFullOrderBook = "products"
                          :> Capture "product" ProductId
                          :> "book"
                          :> QueryParam "level" FullBookLevel
                          :> CBGet FullOrderBook

type Trades = "products"
            :> Capture "product" ProductId
            :> "trades"
            :> CBGet [Trade]

type Candles = "products"
             :> Capture "product" ProductId
             :> "candles"
             :> QueryParam "start" UTCTime
             :> QueryParam "end" UTCTime
             :> QueryParam' '[Required] "granularity" CandleGranularity
             :> CBGet [Candle]

type Stats = "products"
            :> Capture "product" ProductId
            :> "stats"
            :> CBGet TwentyFourHourStats

type Time = "time" :> CBGet CBTime

type API =    Products
         :<|> ProductAggregateOrderBook
         :<|> ProductFullOrderBook
         :<|> Trades
         :<|> Candles
         :<|> Stats
         :<|> Time


api :: Proxy API
api = Proxy


products :: CBRequest [Product]
aggregateOrderBook :: ProductId -> Maybe AggregateBookLevel -> CBRequest AggregateOrderBook
fullOrderBook :: ProductId -> Maybe FullBookLevel -> CBRequest FullOrderBook
trades :: ProductId -> CBRequest [Trade]
candles :: ProductId -> Maybe UTCTime -> Maybe UTCTime -> CandleGranularity -> CBRequest [Candle]
stats :: ProductId -> CBRequest TwentyFourHourStats
time :: CBRequest CBTime
products :<|> aggregateOrderBook :<|> fullOrderBook :<|> trades :<|> candles :<|> stats :<|> time = client api