#!/bin/sh
set -e

# Go to root directory
cd "$(dirname $0)"
# Include utilities
. utils/echo

REQ_OPS=

while [ $# -gt 0 ]; do
	case "$1" in
		-h|--help)
			# TODO
			;;
		--verbose|-v)
			echo_verbose + 1
			;;
		--quiet|-q)
			echo_verbose - 1
			;;
		--operation|-o)
			shift
			REQ_OPS="$REQ_OPS $1"
			;;
		--key)
			KEY_FILE=""
			;;
	esac
	shift
done

# Load host configuration
[ -f hosts/"$(hostname)" ] || echo_die "No configuration for host $(hostname) found."
. hosts/"$(hostname)"

# Run system sanity checks
. utils/syscheck
# Identify some variables from system
. utils/identify

# Include enabled operations
for OPT in $OPERATIONS; do
	if [ -f ops/"$OPT" ]; then
		. ops/"$OPT"
	else
		echo_die "No operation $OPT."
	fi
done

# TODO do we want to have some explicit sorting?

# Check if operations need some update
if [ -z "$REQ_OPS" ]; then
	for OPT in $OPERATIONS; do
		if ! "$OPT"_check; then
			echo_info "Scheduled: $OPT"
			REQ_OPS="$REQ_OPS $OPT"
		fi
	done
fi
if [ -z "$REQ_OPS" ]; then
	echo_info "All operations are in check."
	exit
fi

# Run preparations
for OPT in $REQ_OPS; do
	if "$OPT"_prepare; then
		PREP_OPS="$PREP_OPS $OPT"
	else
		echo_error "Preparation failed for $OPT. Skipping."
	fi
done

# Now apply operations
for OPT in $PREP_OPS; do
	if ! "$OPT"_apply; then
		echo_error "Operation $OPT application failed! Please check what happened."
		break
	fi
done

# And at the end run cleanups on all operations we ever executed
for OPT in $REQ_OPS; do
	"$OPT"_clean || echo_warn "Cleanup of operation $OPT failed."
done