#!/usr/bin/env zsh

SCRIPT_PATH="${0:A:h}"
source $SCRIPT_PATH/apikeys.sh

if (( $+commands[gsed] )); then
        alias sed=gsed
fi

if [ $# -lt 2  ]; then
	echo "please give me target and architecture(s) plss..."
	exit
fi

target=${1:l}
shift
NAME_CAPS=${(C)target}
config_path=$SCRIPT_PATH/config/$target.config.sh
if [ ! -f $config_path ]; then
	echo "Config for $NAME_CAPS not found:"
	echo "Expected config at $config_path"
	exit 1
fi
source $config_path
export VERSION=$(jq -r '.name' <<<$JSON)
echo "Building $NAME_CAPS v$VERSION for architectures: $@"

control_file="Source: $target
Section: $SECTION
Priority: optional
Maintainer: alex

Package: $target
Depends: $DEPENDS
Version: $VERSION
Architecture: REPLACE_ARCHITECTURE
Description: $target"

package_control_file="Package: $target
Maintainer: alex
Depends: $DEPENDS
Version: $VERSION
Architecture: REPLACE_ARCHITECTURE
Description: $target"

package_info="PackageAuthor=alex
UpdateMethod=External
UpdateMethodMessage=rebuild apt packages
Branch=$BRANCH"

service_file="# Be sure to use \`systemctl edit $target\` to modify this service with an override.conf because
# direct changes will be overwritten by package updates.

[Unit]
Description=$NAME_CAPS Service
Wants=network-online.target
After=network-online.target

[Service]
User=$target
Group=$target
SyslogIdentifier=$target
ExecStart=/usr/lib/$target/bin/$NAME_CAPS -nobrowser -data=/var/lib/$target
Type=simple

[Install]
WantedBy=multi-user.target"

sysusers_file="u $target - \"$target daemon\" /var/lib/$target"

tmpfiles_file="# Override this file with a modified version in /etc/tmpfiles.d/
d /var/lib/$target 0755 $target $target
Z /var/lib/$target - $target $target
Z /usr/lib/$target - $target $target
L /var/log/$target - - - - /var/lib/$target/logs/"

postinst_file="#!/bin/sh

SERVER_GROUP=$target

if ! getent group | grep -q \"^$target:\" ; then
	echo -n \"Adding group $target..\"
	addgroup --quiet --system $target 2>/dev/null ||true
	echo \"..done\"
fi

adduser $target \
	--system \
	--home /var/lib/$target \
	--ingroup $target \
	--disabled-password"

rel_info=$(jq '.assets[] | select(.name | contains("linux")) | select(.name | contains("musl") | not)' <<<$JSON)
declare -a tarballs=($(jq '"\(.browser_download_url) /\(.name)"' <<<$rel_info | tr -d '"' | tr "\n" " "))

for ((i = 1; i < ${#tarballs[@]}; i += 2)); do
	url="${tarballs[i]}"
	filename="${tarballs[i + 1]#/}"
	arch=$(sed -E "s/^.+?linux-(.+?).tar.gz$/\1/g" <<<"${tarballs[i + 1]}")
	if [[ "$arch" == "x64" ]] || [[ "$arch" == "core-x64" ]]; then
		arch="amd64"
	fi
	if [[ "$arch" == "core-x86" ]]; then
		arch="i386"
	fi
	if [[ "$arch" == "arm" ]] || [[ "$arch" == "core-arm" ]]; then
		arch="armhf"
	fi
	if [[ "$arch" == "core-arm64" ]]; then
		arch="arm64"
	fi
	if (( $@[(Ie)$arch])); then
		echo "Building for $arch..."
		dir=$(mktemp -d)
		deb_dir=$dir/debian
		mkdir -p $deb_dir
		echo $control_file > $deb_dir/control
		pkgdir=$dir/$target

		mkdir -p $pkgdir/usr/lib/systemd/system
		echo $service_file > $pkgdir/usr/lib/systemd/system/$target.service

		mkdir -p $pkgdir/usr/lib/tmpfiles.d
		echo $tmpfiles_file > $pkgdir/usr/lib/tmpfiles.d/$target.conf

		mkdir -p $pkgdir/usr/lib/$target
		echo "$package_info\nPackageVersion=$VERSION" >$pkgdir/usr/lib/$target/package_info

		curl -Ls $url | tar xz -C $pkgdir/
		rm -rf $pkgdir/$NAME_CAPS/$NAME_CAPS.Update
		mv $pkgdir/$NAME_CAPS $pkgdir/usr/lib/$target/bin
		chmod -R a=,a+rX,u+w $pkgdir/usr/lib/$target/bin
		chmod +x $pkgdir/usr/lib/$target/bin/$NAME_CAPS

		deb_pkg_dir=$pkgdir/DEBIAN
		mkdir -p $deb_pkg_dir
		echo $package_control_file | sed -E "s/REPLACE_ARCHITECTURE/$arch/g" > $deb_pkg_dir/control
		echo $sysusers_file > $deb_pkg_dir/sysusers

		cd $dir
		dpkg-deb --build $target
		mkdir -p $SCRIPT_PATH/debs
		deb_file=$SCRIPT_PATH/debs/$target-$VERSION-$arch.deb
		rm -f $deb_file
		cp $target.deb $deb_file
		rm -rf $dir
	else
		echo "Skipping arch $arch"
	fi
done