#!/bin/bash

# Slackware build script for coppwr

# Ioannis Anagnostakis 2025
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

cd $(dirname $0) ; CWD=$(pwd)

PRGNAM=coppwr
VERSION=${VERSION:-1.7.0}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "aarch64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  LIBDIRSUFFIX=""
fi

if [ -d /opt/rust ]; then
  export PATH="/opt/rust/bin:$PATH"
  if [ -z "$LD_LIBRARY_PATH" ]; then
    export LD_LIBRARY_PATH="/opt/rust/lib$LIBDIRSUFFIX"
  else
    export LD_LIBRARY_PATH="/opt/rust/lib$LIBDIRSUFFIX:$LD_LIBRARY_PATH"
  fi
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
cd $PRGNAM-$VERSION

tar xvf $CWD/pipewire-rs-605d15996f3258b3e1cc34e445dfbdf16a366c7e.tar.gz -C $TMP
tar xvf $CWD/egui-snarl-0d51e7a24e1849114c8806dc6351cebc58dbabcc.tar.gz -C $TMP

chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

mkdir -p vendor
pushd $CWD
mkdir -p crates
mv *.crate crates 2>/dev/null || true
for crate in ./crates/*.crate; do
  [ -f "$crate" ] && tar xf "$crate" -C $TMP/$PRGNAM-$VERSION/vendor
done
popd

PIPEWIRE_RS_DIR=$TMP/pipewire-rs-605d15996f3258b3e1cc34e445dfbdf16a366c7e

for crate_dir in $PIPEWIRE_RS_DIR/*/; do
  [ ! -f "$crate_dir/Cargo.toml" ] && continue

  crate_name=$(grep "^name = " "$crate_dir/Cargo.toml" | head -1 | cut -d'"' -f2)
  crate_ver=$(grep "^version = " "$crate_dir/Cargo.toml" | head -1 | cut -d'"' -f2)

  [ -z "$crate_name" ] || [ -z "$crate_ver" ] && continue

  echo "Vendoring $crate_name-$crate_ver from pipewire-rs workspace"
  mkdir -p vendor/${crate_name}-${crate_ver}
  cp -r "$crate_dir"/* vendor/${crate_name}-${crate_ver}/
done

SNARL_VER=$(grep "^version = " $TMP/egui-snarl-0d51e7a24e1849114c8806dc6351cebc58dbabcc/Cargo.toml | head -1 | cut -d'"' -f2)
mkdir -p vendor/egui-snarl-${SNARL_VER}
cp -r $TMP/egui-snarl-0d51e7a24e1849114c8806dc6351cebc58dbabcc/* \
      vendor/egui-snarl-${SNARL_VER}/

for cratedir in vendor/*/; do
  touch "${cratedir}/.cargo-ok"
  cratename=$(basename "$cratedir")

  # For git dependencies checksum file
  if [[ "$cratename" =~ ^(pipewire|pipewire-sys|libspa|libspa-sys)-[0-9] ]] || \
     [[ "$cratename" =~ ^egui-snarl-[0-9] ]]; then
    echo '{"files":{},"package":null}' > "${cratedir}/.cargo-checksum.json"
    continue
  fi

  python3 -c "
import json
import os
from hashlib import sha256
from pathlib import Path

crate_dir = Path('${cratedir}')
crate_file = Path('$CWD/crates/${cratename}.crate')

if not crate_file.exists():
    exit(0)

# Calculate file checksums
files = {}
for file in crate_dir.rglob('*'):
    if file.is_file() and file.name not in ['.cargo-ok', '.cargo-checksum.json']:
        rel_path = str(file.relative_to(crate_dir))
        with open(file, 'rb') as f:
            files[rel_path] = sha256(f.read()).hexdigest()

# Calculate package checksum
with open(crate_file, 'rb') as f:
    package_hash = sha256(f.read()).hexdigest()

# Write checksum file
with open(crate_dir / '.cargo-checksum.json', 'w') as f:
    json.dump({'files': files, 'package': package_hash}, f)
"
done

# Create Cargo config for vendored sources
mkdir -p .cargo
cat > .cargo/config.toml << EOF
[source.crates-io]
replace-with = 'vendored-sources'

[source.vendored-sources]
directory = 'vendor'
EOF

# Patch Cargo.toml to use vendored versions
PIPEWIRE_VER=$(grep "^version = " $TMP/pipewire-rs-605d15996f3258b3e1cc34e445dfbdf16a366c7e/pipewire/Cargo.toml | head -1 | cut -d'"' -f2)

sed -i "s|pipewire = {version = \"\*\", git = \"https://gitlab.freedesktop.org/dimtpap/pipewire-rs.git\", rev = \"605d15996f3258b3e1cc34e445dfbdf16a366c7e\"}|pipewire = \"${PIPEWIRE_VER}\"|" Cargo.toml

sed -i "s|egui-snarl = {version = \"\*\", git = \"https://github.com/dimtpap/egui-snarl.git\", rev = \"0d51e7a24e1849114c8806dc6351cebc58dbabcc\"}|egui-snarl = \"${SNARL_VER}\"|" Cargo.toml

# Detect Slackware version to continue patching for slackware-15.0...
VERSION_CODENAME=$(grep "VERSION_CODENAME=" /etc/os-release 2>/dev/null | cut -d'=' -f2)

if [ "$VERSION_CODENAME" = "stable" ]; then
# Patch libspa for compatibility with older PipeWire (Slackware 15.0)
  echo "Patching libspa for older PipeWire compatibility"

# Note: We use grep -v to exclude libspa-sys because the file we need to patch
  # (src/param/video/raw.rs) exists in libspa, not libspa-sys. The find command
  # can return directories in different orders depending on filesystem/environment,
  # so we explicitly filter to get the correct crate.
# Following echo debug outputs to verify we found the correct directory structure in github sbo-bot container.
# (can be removed once confirmed building in all environments or in first pkg update)
# https://github.com/SlackBuildsOrg/slackbuilds/pull/12831
  LIBSPA_DIR=$(find vendor -maxdepth 1 -name "libspa-[0-9]*" -type d | grep -v "libspa-sys" | head -1)
  echo "DEBUG: LIBSPA_DIR (without sys) = $LIBSPA_DIR"

  if [ -n "$LIBSPA_DIR" ]; then
    echo "DEBUG: Checking for raw.rs in libspa:"
    ls -la "$LIBSPA_DIR/src/param/video/raw.rs" 2>/dev/null || echo "Not found in libspa"

    LIBSPA_RAW="$LIBSPA_DIR/src/param/video/raw.rs"

    if [ -f "$LIBSPA_RAW" ]; then
      echo "DEBUG: Found! Patching $LIBSPA_RAW"

      sed -i '/^[[:space:]]*flags: 0,$/d' "$LIBSPA_RAW"

      sed -i 's/self\.0\.flags = flags\.bits();/\/\/ self.0.flags = flags.bits(); \/\/ removed for older PipeWire/' "$LIBSPA_RAW"

      sed -i 's/VideoFlags::from_bits_retain(self\.0\.flags)/VideoFlags::empty() \/\/ flags removed for older PipeWire/' "$LIBSPA_RAW"

      sed -i 's/self\.0\.modifier = modifier;/self.0.modifier = modifier as i64;/' "$LIBSPA_RAW"

      sed -i 's/^\([[:space:]]*\)self\.0\.modifier$/\1self.0.modifier as u64/' "$LIBSPA_RAW"
    else
      echo "ERROR: Could not find raw.rs file to patch!"
    fi
  fi
else
  echo ""
fi


export RUSTUP_TOOLCHAIN=stable
export CARGO_TARGET_DIR=target

# We must remove old Cargo.lock and regenerate it offline
rm -f Cargo.lock

# We must generate new Cargo.lock using vendored dependencies (no network)
CARGO_HOME=.cargo \
    cargo generate-lockfile --offline

CARGO_HOME=.cargo \
    cargo build --release --frozen --offline

mkdir -p $PKG/usr/bin
install -m 0755 target/release/"$PRGNAM" $PKG/usr/bin/$PRGNAM
install -Dm644 "assets/io.github.dimtpap.coppwr.desktop" "$PKG/usr/share/applications/io.github.dimtpap.coppwr.desktop"
install -Dm644 "assets/io.github.dimtpap.coppwr.metainfo.xml" "$PKG/usr/share/metainfo/io.github.dimtpap.coppwr.metainfo.xml"
install -Dm644 "assets/icon/scalable.svg" "$PKG/usr/share/icons/hicolor/scalable/apps/io.github.dimtpap.coppwr.svg"
install -Dm644 "assets/icon/512.png" "$PKG/usr/share/icons/hicolor/512x512/apps/io.github.dimtpap.coppwr.png"
install -Dm644 "assets/icon/256.png" "$PKG/usr/share/icons/hicolor/256x256/apps/io.github.dimtpap.coppwr.png"
install -Dm644 "assets/icon/128.png" "$PKG/usr/share/icons/hicolor/128x128/apps/io.github.dimtpap.coppwr.png"
install -Dm644 "assets/icon/64.png" "$PKG/usr/share/icons/hicolor/64x64/apps/io.github.dimtpap.coppwr.png"
install -Dm644 "assets/icon/48.png" "$PKG/usr/share/icons/hicolor/48x48/apps/io.github.dimtpap.coppwr.png"
install -Dm644 "assets/icon/32.png" "$PKG/usr/share/icons/hicolor/32x32/apps/io.github.dimtpap.coppwr.png"

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a LICENSE* *.md $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE