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# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

EAPI=4

inherit check-reqs eutils games unpacker

MY_PN="${PN//-/_}"
MY_REV="-2"
MY_ARCH="${ARCH/amd64/x86_64}"

DESCRIPTION="Amnesia: The Dark Descent is a first person survival horror. A game about immersion, discovery and living through a nightmare."
HOMEPAGE="http://www.amnesiagame.com/"
SRC_URI="${MY_PN}_${PV}${MY_REV}.sh"

RESTRICT="fetch strip"
LICENSE="Frictional_Games-EULA"

SLOT="0"
KEYWORDS="~amd64 ~x86"
IUSE="doc linguas_de linguas_es linguas_fr linguas_it linguas_ru"

DEPEND="app-arch/xz-utils"
RDEPEND="media-libs/freealut
        >=media-libs/glew-1.5
        media-libs/jpeg:62
        media-libs/libpng:1.2
        media-libs/libtheora
        media-libs/libvorbis
        media-libs/openal
        media-libs/sdl-image
        media-libs/sdl-ttf
        sys-libs/zlib
        x11-libs/libxcb
        x11-libs/libXext
        virtual/glu
        virtual/opengl"

CHECKREQS_DISK_BUILD="3500M"

S="${WORKDIR}/${PN}"

GAMEDIR="${GAMES_PREFIX_OPT}/${PN}"

pkg_nofetch() {
        einfo ""
        einfo "Please buy and download \"${SRC_URI}\" from:"
        einfo "  ${HOMEPAGE}"
        einfo "and move/link it to \"${DISTDIR}\""
        einfo ""
}

pkg_setup() {
        games_pkg_setup
}

src_unpack() {
        einfo "\nUnpacking files.  This will take several minutes.\n"
        mkdir "${S}" || die "mkdir "${S}" failed"
        cd "${S}" || die "cd '${S}' failed"

        unpack_makeself || die "unpack_makeself failed"

        mv "instarchive_all" "../${P}.tar.lzma" || die "move 'instarchive_all' failed"
        mv "instarchive_all_${MY_ARCH}" "../${P}-${MY_ARCH}.tar.lzma" || die "move 'instarchive_all_${MY_ARCH}' failed"

        cd "${WORKDIR}" || die "cd '${WORKDIR}' failed"

        echo ">>> Unpacking ./${P}.tar.lzma to ${WORKDIR}"
        #Standard unpack fails due to poor quality of archive
        xz -F lzma -d -c "./${P}.tar.lzma" 2>/dev/null | tar xf - || die "unpacking '${P}.tar.lzma' failed"
        rm "./${P}.tar.lzma"

        unpack "./${P}-${MY_ARCH}.tar.lzma" || die "unpack '${P}-${MY_ARCH}.tar.lzma' failed"
        rm "./${P}-${MY_ARCH}.tar.lzma"
}

src_prepare() {
        # libfltk.so.1.1 is needed because it's no longer in portage
        mv "${WORKDIR}"/Amnesia/libs*/all/libfltk* "${WORKDIR}"/Amnesia/libs*/ || die "libfltk extraction failed"

        #reset ${S} for outprocessing
        rm -rf "${S}"
        mv "${WORKDIR}/Amnesia" "${S}" || die "mv 'Amnesia' failed"
        cd ${S}

        # Files to remove.
        REMOVE="libs*/*
                *.pdf
                *.rtf
                *.sh"

        # Files to keep.
        # Bundled LibIL (media-libs/devil) isn't in portage as too old
        KEEP="libs*/libIL*
                libs*/libfltk*"

        # Collect infos about languages...
        LINGUAS_ARRAY=()                # Linguas - string: E.g.: "linguas_en"
        LANG_ARRAY=()                   # Lang - string: E.g.: "en"
        LANGUAGE_ARRAY=()               # Language - string: E.g.: "english"
        LANGUAGE_SHORT_ARRAY=()         # Language Short - string: E.g.: "eng"
        USE_ARRAY=()                    # Used - bool (0,1)

        local linguas_in_use="0"
        for use in ${IUSE}
        do
                if [[ "${use%%_*}" == "linguas" ]]
                then
                        local tmp="${use}"
                        LINGUAS_ARRAY=(${LINGUAS_ARRAY[@]} "${tmp}")

                        tmp="${tmp##linguas_}"
                        LANG_ARRAY=(${LANG_ARRAY[@]} "${tmp}")

                        case "${tmp}" in
                                "de") tmp="german";;
                                "es") tmp="spanish";;
                                "fr") tmp="french";;
                                "it") tmp="italian";;
                                "ru") tmp="russian";;
                                *) tmp="";;
                        esac
                        LANGUAGE_ARRAY=(${LANGUAGE_ARRAY[@]} "${tmp}")
                        LANGUAGE_SHORT_ARRAY=(${LANGUAGE_SHORT_ARRAY[@]} "${tmp:0:3}")

                        if use ${use}
                        then
                                USE_ARRAY=(${USE_ARRAY[@]} "1")
                                linguas_in_use="$(( ${linguas_in_use} + 1 ))"
                        else
                                USE_ARRAY=(${USE_ARRAY[@]} "0")
                        fi
                fi
        done

        # ...then process them.
        local n="0"
        local docs_eng="0"
        while [[ "${n}" -lt "${#LINGUAS_ARRAY[@]}" ]]
        do
                if [[ "${USE_ARRAY[${n}]}" -gt "0" ]]
                then
                        # If only one lang is selected, use it as default.
                        if [[ "${linguas_in_use}" == "1" ]]
                        then
                                sed -e "s#english.lang#${LANGUAGE_ARRAY[${n}]}.lang#g" \
                                    -i config/*main_init.cfg || die "sed \"config/*main_init.cfg\" failed"
                        fi
                else
                        REMOVE="${REMOVE} $(find config -type f -name "*${LANGUAGE_ARRAY[${n}]}.lang")"
                        if [[ -d "lang/${LANGUAGE_SHORT_ARRAY[${n}]}" ]]
                        then
                                REMOVE="${REMOVE} lang/${LANGUAGE_SHORT_ARRAY[${n}]}"
                        fi
                fi

                if use doc
                then
                        if [[ -f "EULA_${LANG_ARRAY[${n}]}.rtf" && -f "Manual_${LANG_ARRAY[${n}]}.pdf" ]]
                        then
                                KEEP="${KEEP} EULA_${LANG_ARRAY[${n}]}.rtf Manual_${LANG_ARRAY[${n}]}.pdf"
                        else
                                local docs_eng="1"
                        fi
                fi

                n="$(( ${n} + 1 ))"
        done

        if use doc && [[ ( "${linguas_in_use}" == "0" || "${docs_eng}" != "0" ) ]]
        then
                KEEP="${KEEP} EULA_en.rtf Manual_en.pdf Remember*.pdf"
        fi

        einfo " Removing useless files ..."
        for remove in ${REMOVE}
        do
                local removable="1"
                for keep in ${KEEP}
                do
                        if [[ "${remove}" == "${keep}" && "${removable}" == "1" ]]
                        then
                                local removable="0"
                        fi
                done

                if [[ "${removable}" == "1" ]]
                then
                        rm -r "${S}/"${remove} &> /dev/null
                fi
        done

        if use amd64
        then
                mv "Amnesia.bin64" "Amnesia.bin" || die "mv \"Amnesia.bin64\" failed"
                mv "Launcher.bin64" "Launcher.bin" || die "mv \"Launcher.bin64\" failed"
        fi
}

src_install() {
        # Install data
        insinto "${GAMEDIR}"

        einfo " Installing game data files ..."
        for directory in $(find * -maxdepth 0 -type d ! -name "libs*")
        do
                doins -r ${directory} || die "doins game data files failed"
        done

        # Other files
        find . -maxdepth 1 -type f ! -name "*.bin" \
                                   ! -name "*.pdf" \
                                   ! -name "*.png" \
                                   ! -name "*.rtf" \
                                   ! -name "*.sh" \
                                   -exec doins '{}' \; || die "doins other files failed"


        # Install libraries and executables
        einfo " Installing libraries and executables ..."

        if use amd64
        then
                local libsdir="${GAMEDIR}/libs64"
        else
                local libsdir="${GAMEDIR}/libs"
        fi

        exeinto "${libsdir}"
        doexe libs*/* || die "doexe \"libs\" failed"
        dosym "/usr/$(get_libdir)/libGLEW.so" "${libsdir}/libGLEW.so.1.5"

        exeinto "${GAMEDIR}"
        doexe *.bin || die "doexe \".bin\" binaries failed"

        # Make game wrapper
        local wrapper="${S}/${PN}"
        local ext="${PN}-justine"

        cat << EOF > "${wrapper}" || die "echo failed"
#!/bin/sh
if [[ "\$(basename "\${0}")" == "${ext}" ]]
then
        params="ptest \${@}"
fi

if [[ -w "\${HOME}/.frictionalgames/Amnesia/Main/main_settings.cfg" ]]
then
        exec ./Amnesia.bin \${params:-"\${@}"}
else
        exec ./Launcher.bin "\${@}"
fi
EOF

        # Install wrapper
        dogamesbin "${wrapper}" || die "dogamesbin ${wrapper} failed"
        dosym "${PN}" "${GAMES_BINDIR}/${ext}"

        # Install icon and desktop file
        newicon "Amnesia.png" "${PN}.png" || die "newicon failed"
        make_desktop_entry "${PN}" "Amnesia: The Dark Descent" "/usr/share/pixmaps/${PN}.png" || die "make_desktop_entry failed"
        make_desktop_entry "${ext}" "Amnesia: The Dark Descent - Justine" "/usr/share/pixmaps/${PN}.png" || die "make_desktop_entry failed"

        # Install documentation
        if use doc
        then
                dodoc *.rtf *.pdf || die "dodoc failed"
        fi

        # Setting permissions.
        einfo " Setting permissions ..."
        prepgamesdirs
}

pkg_postinst() {
        ewarn ""
        ewarn "Amnesia: The Dark Descent needs video drivers that provide a complete".
        ewarn "GLSL 1.20 implementation.  For more information, please visit:"
        ewarn "http://www.frictionalgames.com/forum/thread-3760.html"
        ewarn ""
        ewarn "--------------------------------------------------------------------"
        ewarn ""
        ewarn "Saved games from previous versions may not be fully compatible."
        ewarn ""
}