#!/bin/bash

# variables
GITHUB_REPO=swaywm/sway
VERSION=${VERSION:-"latest"}
BUILD=15

TAG=gwh
OUTPUT=/tmp
TMP=/tmp/$TAG
CWD=$(pwd)

PRGNAM=$(basename "$CWD")
PKG=$TMP/pkg-$PRGNAM

ARCH=$(uname -m)

REPOSITORY=/home/installs/SlackBuilds/_repositories/$PRGNAM

PREFIX=/usr
MESONFLAGS=""

# nettoyage préalable
rm -fr "$PKG" "${TMP:?}/$PRGNAM"

mkdir -p "$PKG"

# mise en place
[ ! -e "$REPOSITORY" ] && git clone https://github.com/${GITHUB_REPO} "$REPOSITORY"
cd "$REPOSITORY" || exit 1
git reset --hard HEAD
git pull --all

cp -R "$REPOSITORY" $TMP/

cd "$TMP/$PRGNAM/" || exit 1
case $VERSION in
    trunk)
        # PKGVERSION="git_r$(git log -1 --format=%h_%ad --date=format:%Y.%m.%d)"
        PKGVERSION="r$(git rev-list --count HEAD)_$(git log -1 --format=%h)"
        ;;
    latest)
        PKGVERSION=$(git tag --sort=-taggerdate | head -n1)
        git checkout "$PKGVERSION"
        ;;
    *)
        PKGVERSION=$VERSION
        MESONFLAGS="-Dc_args=\"-Wno-error=switch\""
        git checkout "$PKGVERSION"
        ;;
esac
PKGNAM=${PRGNAM}

###########
# PATCHES #
###########

# Tray-menu patch
PATCH=${PATCH:-"yes"}
if [ "$PATCH" = "yes" ]; then
    for p in "$CWD"/patches/*.patch; do
        patch -p1 < "$p"
    done
    PKGVERSION="${PKGVERSION}_patched"
fi

######################
# EMBED DEPENDENCIES #
######################
# wlroots
EMBED_WLROOTS=${EMBED_WLROOTS:-"yes"}
if [ "$EMBED_WLROOTS" = "yes" ]; then
    WLROOTS_VERSION=${WLROOTS_VERSION:-$VERSION}
    WLROOTS_REPOSITORY=/home/installs/SlackBuilds/_repositories/wlroots
    [ ! -e "$WLROOTS_REPOSITORY" ] && git clone https://gitlab.freedesktop.org/wlroots/wlroots.git "$WLROOTS_REPOSITORY"
    cd "$WLROOTS_REPOSITORY" || exit 1
    git reset --hard HEAD
    git pull --all

    mkdir -p "$TMP/$PRGNAM"/subprojects/
    cp -a "$WLROOTS_REPOSITORY" "$TMP/$PRGNAM"/subprojects/wlroots
    cd "$TMP/$PRGNAM"/subprojects/wlroots || exit 1
    case $WLROOTS_VERSION in
        trunk)
            # WLROOTS_VERSION="git_r$(git log -1 --format=%h_%ad --date=format:%Y.%m.%d)"
            WLROOTS_VERSION="r$(git rev-list --count HEAD)_$(git log -1 --format=%h)"
            ;;
        latest)
            WLROOTS_VERSION=$(git tag --sort=-taggerdate | head -n1)
            git checkout "$WLROOTS_VERSION"
            ;;
        *)
            git checkout "$WLROOTS_VERSION"
            ;;
    esac
    PKGNAM="${PKGNAM}+wlroots"
    PKGVERSION="${PKGVERSION}+${WLROOTS_VERSION}"
fi

# libliftoff
EMBED_LIBLIFTOFF=${EMBED_LIBLIFTOFF:-"yes"}
if [ "$EMBED_LIBLIFTOFF" = "yes" ]; then
    LIBLIFTOFF_VERSION=${LIBLIFTOFF_VERSION:-$VERSION}
    LIBLIFTOFF_REPOSITORY=/home/installs/SlackBuilds/_repositories/libliftoff
    [ ! -e "$LIBLIFTOFF_REPOSITORY" ] && git clone https://gitlab.freedesktop.org/emersion/libliftoff.git "$LIBLIFTOFF_REPOSITORY"
    cd "$LIBLIFTOFF_REPOSITORY" || exit 1
    git reset --hard HEAD
    git pull --all

    mkdir -p "$TMP/$PRGNAM"/subprojects/
    cp -a "$LIBLIFTOFF_REPOSITORY" "$TMP/$PRGNAM"/subprojects/libliftoff
    cd "$TMP/$PRGNAM"/subprojects/libliftoff || exit 1
    case $LIBLIFTOFF_VERSION in
        trunk)
            # LIBLIFTOFF_VERSION="git_r$(git log -1 --format=%h_%ad --date=format:%Y.%m.%d)"
            LIBLIFTOFF_VERSION="r$(git rev-list --count HEAD)_$(git log -1 --format=%h)"
            ;;
        latest)
            LIBLIFTOFF_VERSION=$(git tag --sort=-taggerdate | head -n1)
            git checkout "$LIBLIFTOFF_VERSION"
            ;;
        *)
            git checkout "$LIBLIFTOFF_VERSION"
            ;;
    esac
    PKGNAM="${PKGNAM}+libliftoff"
    PKGVERSION="${PKGVERSION}+${LIBLIFTOFF_VERSION}"
fi

# libdisplay-info
EMBED_LIBDISPLAYINFO=${EMBED_LIBDISPLAYINFO:-"yes"}
if [ "$EMBED_LIBDISPLAYINFO" = "yes" ]; then
    LIBDISPLAYINFO_VERSION=${LIBDISPLAYINFO_VERSION:-$VERSION}
    LIBDISPLAYINFO_REPOSITORY=/home/installs/SlackBuilds/_repositories/libdisplay-info
    [ ! -e "$LIBDISPLAYINFO_REPOSITORY" ] && git clone https://gitlab.freedesktop.org/emersion/libdisplay-info.git "$LIBDISPLAYINFO_REPOSITORY"
    cd "$LIBDISPLAYINFO_REPOSITORY" || exit 1
    git reset --hard HEAD
    git pull --all

    mkdir -p "$TMP/$PRGNAM"/subprojects/
    cp -a "$LIBDISPLAYINFO_REPOSITORY" "$TMP/$PRGNAM"/subprojects/libdisplay-info
    cd "$TMP/$PRGNAM"/subprojects/libdisplay-info || exit 1
    case $LIBDISPLAYINFO_VERSION in
        trunk)
            # LIBDISPLAYINFO_VERSION="git_r$(git log -1 --format=%h_%ad --date=format:%Y.%m.%d)"
            LIBDISPLAYINFO_VERSION="r$(git rev-list --count HEAD)_$(git log -1 --format=%h)"
            ;;
        latest)
            LIBDISPLAYINFO_VERSION=$(git tag --sort=-taggerdate | head -n1)
            git checkout "$LIBDISPLAYINFO_VERSION"
            ;;
        *)
            git checkout "$LIBDISPLAYINFO_VERSION"
            ;;
    esac
    PKGNAM="${PKGNAM}+libdisplay_info"
    PKGVERSION="${PKGVERSION}+${LIBDISPLAYINFO_VERSION}"
fi


# Back to compiling sway…
cd "$TMP/$PRGNAM/" || exit 1

meson setup \
      --prefix /usr \
      --mandir /usr/man/ \
      -Dsd-bus-provider=libelogind \
      -Dstrip=true \
      -Ddefault-wallpaper=true \
      -Dswaybar=true \
      -Dxwayland=enabled \
      -Dtray=enabled \
      -Dgdk-pixbuf=enabled \
      -Dswaynag=true \
      -Dbash-completions=true \
      -Dzsh-completions=true \
      -Dfish-completions=true \
      "$MESONFLAGS" \
      build/

ninja -C build/
cd build/ || exit 1
meson install --destdir="$PKG"
cd ../

mkdir -p "$PKG$PREFIX/doc/$PRGNAM"
cp LICENSE ./*.md "$PKG$PREFIX/doc/$PRGNAM/"

cat <<EOF > "$PKG$PREFIX/bin/start_sway.sh"
#!/bin/bash

#set -e

# LOGFILE=~/.wsession-errors
# true > \$LOGFILE
# exec &> \$LOGFILE

set -x
echo "sway Starting: \$( date )"

# Uncomment if mouse pointer is invisible
#export WLR_NO_HARDWARE_CURSORS=1

unset QT_QPA_PLATFORM


# vulklan seems buggy with Intel IGP
if \$(lsmod | grep -q "^i915.*$"); then
   export WLR_RENDERER=gles2
else
   export WLR_RENDERER=vulkan
fi

export CLUTTER_BACKEND=wayland
export SDL_VIDEODRIVER=wayland
export XDG_SESSION_DESKTOP=sway
export XDG_SESSION_TYPE=wayland
export QT_PLATFORMTHEME=qt5ct
export QT_PLATFORM_PLUGIN=qt5ct

export QT_QPA_PLATFORMTHEME=qt5ct
export MOZ_ENABLE_WAYLAND=1
export XDG_CURRENT_DESKTOP=sway
export XDG_PICTURES_DIR=~/.wallpapers

export SWAYSOCK=/run/user/\$(id -u)/sway-ipc.\$(id -u).\$(pgrep -x sway).sock
export XDG_RUNTIME_DIR=/tmp/xdg-runtime-\$(id -u)

mkdir -p \$XDG_RUNTIME_DIR
chmod 0700 \$XDG_RUNTIME_DIR

# avoid wlr error
unset DISPLAY

killall daemon

exec dbus-run-session /usr/bin/sway
#dbus-launch --sh-syntax --exit-with-session /usr/bin/sway
#exec /usr/bin/sway
EOF
chmod +x "$PKG$PREFIX/bin/start_sway.sh"
sed -i 's|Exec=sway|Exec=/usr/bin/start_sway.sh|' "$PKG$PREFIX/share/wayland-sessions/sway.desktop"

###############
# corrections #
###############
cd "$PKG" || exit 1
chown -R root:root ./*
[ -d "$PKG$PREFIX/man" ] && find "$PKG$PREFIX/man" -name "*.?" -type f -exec gzip -9 {} \;

# Don't package wlroots includes or .so link as we don't want to interfere with SBo's wlroots
find "$PKG$PREFIX/lib$(uname -m | grep -o 64)/" -type l -exec rm {} \;
rm -r "$PKG$PREFIX/lib$(uname -m | grep -o 64)/pkgconfig/"
rm -r "$PKG$PREFIX/include/"

####################
# Actual packaging #
####################
mkdir -p "$PKG/install"

cat <<EOF > "$PKG/install/slack-desc"
# HOW TO EDIT THIS FILE:
# The "handy ruler" below makes it easier to edit a package description.  Line
# up the first '|' above the ':' following the base package name, and the '|'
# on the right side marks the last column you can put a character in.  You must
# make exactly 11 lines for the formatting to be correct.  It's also
# customary to leave one space after the ':'.

     |-----handy-ruler------------------------------------------------------|
$PRGNAM: $PRGNAM (i3-compatible Wayland compositor)
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM:
$PRGNAM: https://github.com/${GITHUB_REPO}
EOF

# empaquetage
rm -f "$PKG/{,usr/}lib$(uname -m | grep -o 64)/*.la"
/sbin/makepkg --linkadd y --chown n --prepend "$OUTPUT/${PKGNAM}-$(echo "$PKGVERSION" | tr - _)-$ARCH-$BUILD$TAG.txz"