{-# LANGUAGE OverloadedLists #-}
{-# LANGUAGE OverloadedStrings #-}

module Common.Unit where

import Hledger.Flow.BaseDir (relativeToBase')
import Hledger.Flow.Common
import qualified Data.List as List
import qualified Data.Map.Strict as Map
import Test.HUnit

testShowCmdArgs :: Test
testShowCmdArgs =
  TestCase
    ( do
        let opts = ["--number", "/tmp/file with spaces"]
        let expected = "--number '/tmp/file with spaces'"
        let actual = showCmdArgs opts
        assertEqual "Convert command-line arguments to text" expected actual
    )

testRelativeToBase :: Test
testRelativeToBase =
  TestCase
    ( do
        let expected = "file1.journal"
        let relativeWithTrailingSlash = relativeToBase' "./base/dir/" "./base/dir/file1.journal"
        assertEqual "relative base dir with trailing slash" expected relativeWithTrailingSlash

        let relativeNoTrailingSlash = relativeToBase' "./base/dir" "./base/dir/file1.journal"
        assertEqual "relative base dir without a trailing slash" expected relativeNoTrailingSlash

        let absoluteWithTrailingSlash = relativeToBase' "/base/dir/" "/base/dir/file1.journal"
        assertEqual "absolute base dir with trailing slash" expected absoluteWithTrailingSlash

        let absoluteNoTrailingSlash = relativeToBase' "/base/dir" "/base/dir/file1.journal"
        assertEqual "absolute base dir without a trailing slash" expected absoluteNoTrailingSlash

        let absoluteTwiceNoTrailingSlash = relativeToBase' "/base/dir" "/base/dir"
        assertEqual "absolute base dir without a trailing slash supplied twice" "./" absoluteTwiceNoTrailingSlash

        let absoluteTwiceWithTrailingSlash = relativeToBase' "/base/dir/" "/base/dir/"
        assertEqual "absolute base dir with a trailing slash supplied twice" "./" absoluteTwiceWithTrailingSlash

        let absoluteTwiceNoTrailingSlashOnSecondParam = relativeToBase' "/base/dir/" "/base/dir"
        assertEqual "absolute base dir supplied twice, but the second param has no slash" "./" absoluteTwiceNoTrailingSlashOnSecondParam

        let mismatch = relativeToBase' "/base/dir" "/unrelated/dir/file1.journal"
        assertEqual "A basedir with no shared prefix should return the supplied file unchanged" "/unrelated/dir/file1.journal" mismatch
    )

testExtractDigits :: Test
testExtractDigits =
  TestCase
    ( do
        let txt1 = "A number: 321\nAnother number is 42, so is 0"

        let expected1 = Right 321420
        let actual1 = extractDigits txt1
        assertEqual "Extract digits from text 1" expected1 actual1

        let txt2 = "No numbers in this line"

        let expected2 = Left "input does not start with a digit"
        let actual2 = extractDigits txt2
        assertEqual "Extract digits from text 2" expected2 actual2
    )

testChangePathAndExtension :: Test
testChangePathAndExtension =
  TestCase
    ( do
        let src1 = "import/john/bank/acc/1-in/2018/2018-06-30.csv"
        let expected1 = "import/john/bank/acc/3-journal/2018/2018-06-30.journal"
        let actual1 = changePathAndExtension "3-journal/" "journal" src1
        assertEqual "Change 1-in to 3-journal and extension" expected1 actual1

        let src2 = "import/john/bank/acc/2-preprocessed/2018/2018-06-30.csv"
        let expected2 = "import/john/bank/acc/3-journal/2018/2018-06-30.journal"
        let actual2 = changePathAndExtension "3-journal/" "journal" src2
        assertEqual "Change 2-preprocessed to 3-journal and extension" expected2 actual2

        let src3 = "import/john/bank/acc/3-journal/2018/2018-06-30.csv"
        let expected3 = "import/john/bank/acc/3-journal/2018/2018-06-30.journal"
        let actual3 = changePathAndExtension "3-journal/" "journal" src3
        assertEqual "Leave other directories intact, only change extension" expected3 actual3
    )

testGroupValuesBy :: Test
testGroupValuesBy =
  TestCase
    ( do
        let values = ["b2", "a1", "b1", "a2"]
        let grouped = groupValuesBy (take 1) values
        let normalize = Map.map List.sort
        let expected = Map.fromList [("a", ["a1", "a2"]), ("b", ["b1", "b2"])]
        assertEqual "Group values by key" (normalize expected) (normalize grouped)
    )

tests :: Test
tests = TestList [testShowCmdArgs, testRelativeToBase, testExtractDigits, testChangePathAndExtension, testGroupValuesBy]