{-# LANGUAGE OverloadedStrings #-}
module Operations.GroupBy where

import qualified DataFrame as D
import qualified DataFrame as DI
import qualified DataFrame as DE
import qualified Data.Text as T
import qualified Data.Vector as V
import qualified Data.Vector.Unboxed as VU

import Assertions
import Test.HUnit

values :: [(T.Text, DI.Column)]
values = [ ("test1", DI.fromList (concatMap (replicate 10) [1 :: Int, 2, 3, 4]))
         , ("test2", DI.fromList (take 40 $ cycle [1 :: Int,2]))
         , ("test3", DI.fromList [(1 :: Int)..40])
         , ("test4", DI.fromList (reverse [(1 :: Int)..40]))
         ]

testData :: D.DataFrame
testData = D.fromNamedColumns values

groupBySingleRowWAI :: Test
groupBySingleRowWAI = TestCase (assertEqual "Groups by single column"
                -- We don't yet compare offsets and indices
                (D.Grouped testData ["test1"] VU.empty VU.empty)
                (D.groupBy ["test1"] testData))

groupByMultipleRowsWAI :: Test
groupByMultipleRowsWAI = TestCase (assertEqual "Groups by single column"
                -- We don't yet compare offsets and indices
                (D.Grouped testData ["test1", "test2"] VU.empty VU.empty)
                (D.groupBy ["test1", "test2"] testData))

groupByColumnDoesNotExist :: Test
groupByColumnDoesNotExist = TestCase (assertExpectException "[Error Case]"
                                (DE.columnNotFound "[\"test0\"]" "groupBy" (D.columnNames testData))
                                (print $ D.groupBy ["test0"] testData))

tests :: [Test]
tests = [ TestLabel "groupBySingleRowWAI" groupBySingleRowWAI
        , TestLabel "groupByMultipleRowsWAI" groupByMultipleRowsWAI
        , TestLabel "groupByColumnDoesNotExist" groupByColumnDoesNotExist
        ]