#!/bin/sh

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

dryrun=0
runscripts=1
runconfigure=1
localdb=/var/lib/zpm/local.db

# zpm-install [-SCn] [ -d localdb ] [ -f pkgfile ] [ -R installroot ] pkgstr ...
while getopts :f:d:R:nSC opt; do
	case $opt in
		f) pkgfile="$OPTARG" ;;
		d) localdb="$OPTARG" ;;
		R) rootdir="$OPTARG" ;;
		S) runscripts=0 ;;
		C) runconfigure=0 ;;
		n) dryrun=1
	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 C = create ok, R = full package id, F = specified package file

# immediate error
# C-- 100 error, must specify something
# --- 000 error, must specify something
if [ -z "$release" ] && [ -z "$pkgfile" ]; then
	die must specify package file or complete package id
fi

# --F 001 error, wouldn't know which pkgid to create, could derive from file?
# C-F 101 error, since package wouldn't exist in file to find
if [ -z "$release" ]; then
	die must specify complete package id
fi

# set file from pkgid
# CR- 110 set file from pkgid, create if needed
# -R- 010 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
# CRF 111 create package in file given, create file if needed
# -RF 011 create package in file, error if file doesn't exist
if [ ! -f "$pkgfile" ]; then
	if [ $create -eq 1 ]; then
		zpm init $pkgfile
	else
		die $pkgfile does not exist
	fi
fi

set -e

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

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

ZPMDB=$localdb
export ZPMDB

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

if [ -n "$rootdir" ];
	ZPM_ROOT_DIR="$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)

	current=$(zpm list -s installed "$package")
	
	if [ $runscripts -gt 0 ]; then
		zpm runscript -f $packagefile -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

	zpm pkgfiles -f $pkgfile $pkgid
	if [ $runscripts -gt 0 ]; then
		zpm runscript -f $pkgfile -p post-install $pkgid $current
	fi
	# need a way to update multiple statuses all in one
	# zpm pkgstatus $pkgid installed $pkgid updated
	zpm pkg $pkgid status installed
	if [ $runconfigure -gt 0 ]; then
		zpm runscript -f $pkgfile -p configure $pkgid $current
	fi
done