-----------------------------------------------------------------------------
-- |
-- Module      :  Distribution.Configuration
-- Copyright   :  Thomas Schilling, 2007
-- 
-- Maintainer  :  Isaac Jones <ijones@syntaxpolice.org>
-- Stability   :  alpha
-- Portability :  portable
--
-- Configurations

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module UnitTest.Distribution.PackageDescription.Configuration where

import Distribution.PackageDescription.Configuration

import Distribution.Package (Package)
import Distribution.PackageDescription
         ( GenericPackageDescription(..), PackageDescription(..)
         , Library(..), Executable(..), BuildInfo(..)
         , Flag(..), CondTree(..), ConfVar(..), ConfFlag(..), Condition(..) )
import Distribution.Simple.PackageIndex (PackageIndex)
import qualified Distribution.Simple.PackageIndex as PackageIndex
import Distribution.Version
    ( Version(..), Dependency(..), VersionRange(..)
    , withinRange, parseVersionRange )
import Distribution.Compiler (CompilerFlavor, parseCompilerFlavor)
import Distribution.System
         ( OS, readOS, Arch, readArch )
import Distribution.Simple.Utils (currentDir)

import Distribution.Compat.ReadP as ReadP hiding ( char )
import qualified Distribution.Compat.ReadP as ReadP ( char )

import Data.Char ( isAlphaNum, toLower )
import Data.Maybe ( catMaybes, maybeToList )
import Data.List  ( nub )
import Data.Monoid

import Data.List ( (\\) )
import Distribution.ParseUtils

------------------------------------------------------------------------------
-- Testing

tstTree :: CondTree ConfVar [Int] String
tstTree = CondNode "A" [0] 
              [ (CNot (Var (Flag (ConfFlag "a"))), 
                 CondNode "B" [1] [],
                 Nothing)
              , (CAnd (Var (Flag (ConfFlag "b"))) (Var (Flag (ConfFlag "c"))),
                CondNode "C" [2] [],
                Just $ CondNode "D" [3] 
                         [ (Lit True,
                           CondNode "E" [4] [],
                           Just $ CondNode "F" [5] []) ])
                ]


test_simplify = simplifyWithSysParams i386 darwin ("ghc",Version [6,6] []) tstCond 
  where 
    tstCond = COr (CAnd (Var (Arch ppc)) (Var (OS darwin)))
                  (CAnd (Var (Flag (ConfFlag "debug"))) (Var (OS darwin)))
    [ppc,i386] = ["ppc","i386"]
    [darwin,windows] = ["darwin","windows"]



test_parseCondition = map (runP 1 "test" parseCondition) testConditions
  where
    testConditions = [ "os(darwin)"
                     , "arch(i386)"
                     , "!os(linux)"
                     , "! arch(ppc)"
                     , "os(windows) && arch(i386)"
                     , "os(windows) && arch(i386) && flag(debug)"
                     , "true && false || false && true"  -- should be same 
                     , "(true && false) || (false && true)"  -- as this
                     , "(os(darwin))"
                     , " ( os ( darwin ) ) "
                     , "true && !(false || os(plan9))"
                     , "flag( foo_bar )"
                     , "flag( foo_O_-_O_bar )"
                     , "impl ( ghc )"
                     , "impl( ghc >= 6.6.1 )"
                     ]

test_ppCondTree = render $ ppCondTree tstTree (text . show)
  

test_simpCondTree = simplifyCondTree env tstTree
  where
    env x = maybe (Left x) Right (lookup x flags)
    flags = [(mkFlag "a",False), (mkFlag "b",False), (mkFlag "c", True)] 
    mkFlag = Flag . ConfFlag

test_resolveWithFlags = resolveWithFlags dom "os" "arch" ("ghc",Version [6,6] []) [tstTree] check
  where
    dom = [("a", [False,True]), ("b", [True,False]), ("c", [True,False])]
    check ds = let missing = ds \\ avail in
               case missing of
                 [] -> DepOk
                 _ -> MissingDeps missing
    avail = [0,1,3,4]

test_ignoreConditions = ignoreConditions tstTree