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{-# OPTIONS_GHC -Wno-missing-signatures #-}
import Test.HUnit
import Control.Monad.Except
import qualified Data.Map as M
import qualified Data.List as L
import Builtins
import Tokenizer ( tokenize )
import Parser ( parse )
import Interpreter ( evaluate, runInlineScript )
import Utils
import TestUtils

tokenizeTests = testGroup "tokenize" [
     do (got, _) <- expectSuccessL M.empty $ tokenize "<test>" "(+ 1 (- 10 5))"
        let expected = ["(", "+", "1", "(", "-", "10", "5", ")", ")"]
        assertEqual "" (map tokenContent got) expected
    ]

parseTests = testGroup "parse" [
     do (got, _) <- expectSuccessL M.empty $ parse (map makeNonsenseToken ["(", "+", "1", "2", ")"])
        let expected = [astFunctionCall
                            [ astSymbol "+", astInteger 1, astInteger 2 ]]
        assertEqual "" expected got,

     do got <- expectErrorL M.empty $ parse (map makeNonsenseToken ["(", "+", "1", "2"])
        let expected = "unbalanced function call"
        assertEqual "" expected got,

     do (got, _) <- expectSuccessL M.empty $ parse (map makeNonsenseToken ["\"1000\n2000\n3000\""])
        let expected = [astString "1000\n2000\n3000"]
        assertEqual "" expected got
    ]

evaluateTests = testGroup "evaluate" [
     do let env = M.fromList [builtinAdd2] :: Env
        (gotAST, LState { stateEnv = gotEnv }) <- expectSuccessL env $
            evaluate (astFunctionCall [astSymbol "+", astInteger 1, astInteger 2])

        let expectedAST = astInteger 3
        assertEqual "" expectedAST gotAST
        assertEqual "" (M.keys env) (M.keys gotEnv)
    ]

e2eTests = testGroup "e2e" [
     do let env = M.fromList [builtinSubtract2] :: Env
        let script1 = "(let sub2 (\\[a b] (- a b)))\n(sub2 3 2)"
        (gotASTs, LState { stateEnv = gotEnv }) <- expectSuccessL env $
            runInlineScript "<test>" script1

        let expectedEnvKeys = ["-", "sub2"]
        assertEqual "" expectedEnvKeys (M.keys gotEnv)
        assertEqual "" (astInteger 1) (last gotASTs),

     do let env = M.empty :: Env
        let script1 = "(record A foo bar)"
        (gotASTs, LState { stateEnv = gotEnv }) <- expectSuccessL env $
            runInlineScript "<test>" script1

        let expectedEnvKeys = L.sort ["A/create", "A/get-foo", "A/set-foo", "A/get-bar", "A/set-bar"]
        assertEqual "" expectedEnvKeys (L.sort $ M.keys gotEnv)
        assertEqual "" astUnit (last gotASTs),

     do let env = M.empty :: Env
        let script1 = "(record A foo)\n(let a (A/create 123))\n(A/get-foo a)"
        (gotASTs, _) <- expectSuccessL env $
            runInlineScript "<test>" script1

        let expectedLastAST = ast $ ASTInteger 123
        assertEqual "" expectedLastAST (last gotASTs),

     do let env = M.fromList [builtinSortByFirst] :: Env
        let script1 = "(sort-by-first [[2 1] [3 2] [1 3]])"
        (gotASTs, _) <- expectSuccessL env $
            runInlineScript "<test>" script1

        let expectedLastAST = astVector $
                [astVector [astInteger 1, astInteger 3],
                 astVector [astInteger 2, astInteger 1],
                 astVector [astInteger 3, astInteger 2]]
        assertEqual "" expectedLastAST (last gotASTs),

     do let env = M.fromList [builtinAdd2, builtinMultiply2] :: Env
        let script1 = "(let f (\\[x] (let y (+ x 1)) (let z (+ 3 y)) (* 2 z)))\n(f 1)"
        (gotASTs, _) <- expectSuccessL env $
            runInlineScript "<test>" script1

        let expectedLastAST = astInteger 10
        assertEqual "" expectedLastAST (last gotASTs)
    ]

testGroup label xs = TestLabel label $ TestList $ map TestCase xs

tests = [
      tokenizeTests
    , parseTests
    , evaluateTests
    , e2eTests
    ]

main :: IO ()
main = void $ runTestTT $ test tests