{-# LANGUAGE CPP #-}

-- |
-- Module      :  Main
-- Copyright   :  (C) 2007  Bryan O'Sullivan
--                (C) 2012-2018  Jens Petersen
--
-- Maintainer  :  Jens Petersen <petersen@fedoraproject.org>
-- Stability   :  alpha
-- Portability :  portable
--
-- Explanation: Main entry point for building RPM packages.

-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.

module Main where

#if (defined(MIN_VERSION_base) && MIN_VERSION_base(4,13,0))
#else
import Control.Applicative ((<|>)
#if (defined(MIN_VERSION_base) && MIN_VERSION_base(4,8,0))
#else
                         , (<$>), (<*>)
#endif
                           )
#endif
import Distribution.Text (simpleParse)
import Distribution.Verbosity (normal, silent)
#if !MIN_VERSION_simple_cmd_args(0,1,7)
import Options.Applicative (maybeReader)
#endif
import System.IO (BufferMode(LineBuffering), hSetBuffering, stdout)

import Commands.BuildDep (builddep)
import Commands.Depends (depends, Depends (..))
import Commands.Diff (diff)
import Commands.Install (install)
import Commands.Refresh (refresh)
import Commands.RpmBuild (rpmBuild_)
import Commands.Spec (createSpecFile_)
import Commands.Update (update)

import PackageUtils (RpmStage (..))
import Paths_cabal_rpm (version)
import Types

import SimpleCabal (PackageIdentifier(..))
import SimpleCmdArgs

main :: IO ()
main = do
  hSetBuffering stdout LineBuffering
  simpleCmdArgs (Just version) "Cabal-rpm tool"
    "RPM package tool for Haskell Stackage/Hackage packages" $
    subcommands
    [ Subcommand "spec" "Generate a spec file" $
      createSpecFile_ <$> ignoreMissing <*> quietOpt <*> flags <*> testsuite <*> force <*> pkgtype <*> fmap toSubpkgStream subpackage <*> pkgVerSpecifier
    , Subcommand "srpm" "Generate an srpm" $
      rpmBuild_ Source <$> verboseRpmbuild <*> flags <*> pkgtype <*> subpackage <*> pkgVerSpecifier
    , Subcommand "prep" "Unpack source" $
      rpmBuild_ Prep <$> verboseRpmbuild <*> flags <*> pkgtype <*> subpackage <*> pkgVerSpecifier
    , Subcommand "local" "Build rpm package locally" $
      rpmBuild_ Binary <$> quietRpmbuild <*> flags <*> pkgtype <*> subpackage <*> pkgVerSpecifier
    , Subcommand "build" "Alias for 'local' - builds rpm locally" $
      rpmBuild_ Binary <$> quietRpmbuild <*> flags <*> pkgtype <*> subpackage <*> pkgVerSpecifier
    , Subcommand "builddep" "Install build dependencies with dnf" $
      builddep <$> flags <*> pkgVerSpecifier
    , Subcommand "install" "Build and install recursively" $
      install <$> flags <*> pkgtype <*> subpackage <*> pkgVerSpecifier
    -- should be (optional versionArg) not pkgid
    , Subcommand "diff" "Diff with pristine generated spec file" $
      diff <$> flags <*> pkgtype <*> pkgVerSpecifier
    , Subcommand "depends" "List Haskell dependencies" $
      depends Depends <$> flags <*> pkgVerSpecifier
    , Subcommand "requires" "List buildrequires for package" $
      depends Requires <$> flags <*> pkgVerSpecifier
    , Subcommand "missingdeps" "List dependencies not available" $
      depends Missing <$> flags <*> pkgVerSpecifier
    -- should be just Maybe PackageName
    , Subcommand "refresh" "Refresh spec file to latest packaging" $
      refresh <$> dryrun <*> pkgtype <*> pkgVerSpecifier
    , Subcommand "update" "Update package to latest version" $
      update <$> pkgVerSpecifier
    ]
  where
    pkgId :: Parser (Maybe PackageIdentifier)
    pkgId = optional (argumentWith (maybeReader simpleParse) "PKG[VER]")

    stream :: Parser (Maybe Stream)
    stream = optional (optionWith auto 's' "stream" "STREAM" "Stackage stream or Hackage")

    flags :: Parser Flags
    flags = optionalWith auto 'f' "flag" "[(String,Bool)]" "Set or disable Cabal flags" []

    quietRpmbuild = switchWith 'q' "quiet" "Quiet rpmbuild output"
    verboseRpmbuild = flagWith True False 'v' "verbose" "Verbose rpmbuild output"

    testsuite :: Parser Bool
    testsuite = switchWith 'T' "tests" "Force enabling the test-suite (even if deps missing)"

    force :: Parser Bool
    force = switchWith 'F' "force" "Force overwriting existing of any .spec file"

    dryrun = switchWith 'n' "dry-run" "Just show patch"

    ignoreMissing = switchWith 'm' "ignore-missing" "Don't check for deps of missing deps"

    -- quietOpt :: Parser Verbosity
    quietOpt = flagWith normal silent 'q' "quiet" "Silence Cabal"

    pkgtype :: Parser PackageType
    pkgtype =
      flagWith' StandalonePkg 't' "standalone" "Create a standalone package that uses cabal-install to build and install" <|>
      flagWith DefaultPkg BinaryPkg 'b' "binary" "Make the base package name to be the Haskell package name"

    subpackage :: Parser Bool
    subpackage = switchWith 'S' "subpackage" "Subpackage missing Haskell dependencies"

    pkgVerSpecifier :: Parser (Maybe PackageVersionSpecifier)
    pkgVerSpecifier = streamPkgToPVS <$> stream <*> pkgId

    toSubpkgStream :: Bool -> Maybe (Maybe Stream)
    toSubpkgStream False = Nothing
    toSubpkgStream True = Just Nothing