#!/bin/sh

die() {
	echo $* 1>&2
	exit 1
}

dryrun=0
verbose=0
runscripts=1
runconfigure=1
absorb=0
overwrite=0
syncopts=''

# zpm-install [-SCn] [ -d localdb ] [ -f pkgfile ] [ -R installroot ] pkgstr ...
while getopts f:d:R:nSCvAO opt; do
	case $opt in
		f) pkgfile="$OPTARG" ;;
		d) localdb="$OPTARG" ;;
		R) rootdir="$OPTARG" ;;
		S) runscripts=0 ;;
		C) runconfigure=0 ;;
		A) absorb=1; syncopts="${syncopts} -A" ;;
		O) overwrite=1; syncopts="${syncopts} -O" ;;
		n) dryrun=1 ;;
		v) verbose=1 ;;
		*) die "usage ..." ;;
	esac
done
shift $(( OPTIND - 1))

pkgid=$1

if [ -z "$pkgid" ]; then
	die "must specify pkgid"
fi

eval "$(zpm parse -E $pkgid)"

if [ -z "$pkgfile" ]; then
	pkgfile=$ZPM_PACKAGE_FILE
fi

# cases R = full package id, F = specified package file

# immediate error
# -- 00 error, must specify something
if [ -z "$release" ] && [ -z "$pkgfile" ]; then
	die must specify package file or complete package id
fi

# TODO look in package file
# -F 01 error, wouldn't know which pkgid to create, could derive from file?
if [ -z "$release" ]; then
	# must have package file, or would have died above
	pkgid=$(zpm findpkg -f $pkgfile $pkgid)
	if [ -n "$pkgid" ]; then
		eval "$(zpm parse -E $pkgid)"
	fi
fi

if [ -z "$pkgid" ]; then
	die "$0 can't figure out a package id"
fi

# set file from pkgid
# R- 10 set file from pkgid, create in file, error if no file
if [ -z "$pkgfile" ]; then
	pkgfile="$pkgid.zpm"
fi

# will now be one of these
# RF 11 create package in file, error if file doesn't exist
if [ ! -f "$pkgfile" ]; then
	die $pkgfile does not exist
fi

if [ "$idempotent" = 1 ]; then
	idempotent='or ignore'
fi

package=$(zpm quote "$name")
pkgver=$(zpm quote "$version")
pkgrel=$(zpm quote "$release")

if [ -z "$rootdir" ]; then
	: rootdir=${rootdir%%/}
fi

if [ -z "$localdb" ]; then
	localdb=${rootdir}/var/lib/zpm/local.db
fi

if [ ! -f "$localdb" ]; then
	for d in /var /var/lib /var/lib/zpm; do
		test -d $rootdir/$d || mkdir $rootdir/$d || die "can't create $rootdir/$d/: $!"
	done
	zpm init "$localdb"
	if [ $? -ne 0 ]; then
		die "aborting install"
	fi
fi

ZPMDB=$localdb
export ZPMDB

if [ -z "$ZPMDB" ]; then
	die "no local db"
else
	#echo "localdb = $ZPMDB"
	true
fi

zpm test -v "$ZPMDB" || die "$ZPMDB is not a zpm database"

# check if we're installing something already
var=$(zpm list -f $localdb -s installing | wc -l)
if [ $var -gt 0 ]; then
	zpm list -v -f $localdb -s installing 
	die "already ($localdb) installing $var package(s)"
fi
# check if we're installing something already
var=$(zpm list -f $localdb -s removing | wc -l)
if [ $var -gt 0 ]; then
	zpm list -v -f $localdb -s removing 
	die "already ($localdb) removing $var package(s)"
fi
var=$(zpm list -f $localdb -s updating | wc -l)
if [ $var -gt 0 ]; then
	zpm list -v -f $localdb -s updating 
	die "already ($localdb) updating $var package(s)"
fi

if [ -n "$rootdir" ]; then
	ZPM_ROOT_DIR="$rootdir"
	export ZPM_ROOT_DIR
fi

# TODO mark already installed packages as updating?
for pkgstr in "$@"; do
	pkgid=$(zpm findpkg -f $pkgfile $pkgstr)
	if [ $? -ne 0 ]; then
		# TODO log
		die "can't find package $pkgstr in $pkgfile"
	fi

	curstatus=$(zpm pkg $pkgid status)
	if [ "$curstatus" = 'installed' ]; then
		die "$pkgid already installed"
	fi

	eval $(zpm parse -E $pkgid)

	#zpm list -v
	current=$(zpm list -s installed "$package")
	
	if [ $runscripts -gt 0 ]; then
		zpm runscript -f $pkgfile -p pre-install $pkgid $current
		if [ $? -ne 0 ]; then
			# TODO log
			die "pre-install script for $pkgid failed"
		fi
	fi

	# only merge if localdb and pkgfile are different
	if [ "$pkgfile" != "$ZPMDB" ]; then
		zpm merge -f $pkgfile -s installing $pkgid
		if [ $? -ne 0 ]; then
			# TODO log
			die "merging $pkgid failed"
		fi
	fi
	# TODO but need to mark as installing if not merged

	#zpm shell $ZPMDB 'select * from install_status' 1>&2
	if [ $dryrun -gt 0 ]; then
		#zpm list -v
		#zpm shell $ZPMDB 'select * from install_status'
		zpm syncfs $syncopts -nv -f $pkgfile
		zpm pkg $pkgid status=dryrun
		continue
	fi

	if [ $verbose -gt 0 ]; then
		syncopts="${syncopts} -v"
	fi

	zpm syncfs $syncopts -f $pkgfile

	if [ $? -ne 0 ]; then
		die 'zpm-syncfs failed';
	fi

	if [ $runscripts -gt 0 ]; then
		zpm runscript -f $pkgfile -p post-install $pkgid $current
	fi

	if [ -n "$current" ]; then
		zpm pkg $pkgid status=installed :$current status=updated
	else
		zpm pkg $pkgid status=installed
	fi

	if [ $(id -u) -eq 0 ]; then
		if [ -f $rootdir/sbin/ldconfig ]; then
			$rootdir/sbin/ldconfig -r ${rootdir:-/}
		elif [ -f /sbin/ldconfig ]; then
			/sbin/ldconfig -r ${rootdir:-/}
		else
			true
		fi
	fi

	# TODO skip configure if not on a terminal, regardless of settings
	# TODO will need force option
	if [ $runconfigure -gt 0 ]; then
		zpm runscript -f $pkgfile -p configure $pkgid $current
	fi
done