#!/bin/bash

. "$rootdir/include/JSON.sh"

# $1 = list of tickets without prefix
# $2 = prefix to prepend
prepend_prefix()
{
	echo "$1" | $SED -e "s/\(^\|[[:space:]]\+\)\([0-9]\+\)/\1$2-\2/g"
}

# $1 = message
# $2 = ticket prefix
extract_tickets()
{
	local msg="$(echo "$1" | tr '\n' ' ')"
	local prefix="$2"
	local tickets=
	while true
	do
		echo "$msg" | grep -q "\<$prefix-[0-9]\+\>" || break
		tickets+="$(echo "$msg" | $SED -e "s/.*\<\($prefix-[0-9]\+\)\>.*$/\1/") "
		msg=$(echo "$msg" | $SED -e "s/^\(.*\)\<$prefix-[0-9]\+\>.*$/\1/")
	done
	echo $tickets
}

# $1 = list of tickets
# $2 = ticket to remove
remove_ticket()
{
	echo "$1" | $SED -e "s/^\(.*\)\<$2\>[[:space:]]*\(.*\)$/\1 \2/;s/^[[:space:]]*//"
}

# $1 = ticket (with project prefix)
get_ticket_title()
{
	eval echo "$(wget -q -O - $JIRA_URL/rest/api/2/issue/$1 | tokenize | parse |
		sed -n 's/^\["fields","summary"\][[:space:]]*\(.*\)/\1/p')"
}

# analyses conflicts
# $1 = source branch
# $2 = target branch with conflicts
# $3 = list of conflicts
# $4 = list of revisions not merged yet
# $5 = list of revisions merged
# $6 = function to use for determining limiting revision
# $7 = operator to use for comparing with limit
# $8 = ticket prefix
# $9 = non-empty if conflicts should be resolved
analyse_conflicts()
{
(
	src="$1"
	tgt="$2"
	limit=$($6 "$5")
	revs="$(subtract_list "$4" "$5")"
	cmpop="$7"
	prefix="$8"
	resolve="$9"

	OLDIFS="$IFS"
	IFS=""
	while read -r line
	do
		IFS="$OLDIFS"
		fqfile="$(echo "$line" | $SED 's/^....... *//')"
		file="${fqfile#$local_root/$tgt/}"

		reason=
		if echo "$line" | grep -q "^C...... "
		then
			do_message "Text conflict in " -n red
		elif echo "$line" | grep -q "^.C..... "
		then
			do_message "Property conflict in " -n red
		elif echo "$line" | grep -q "^......C "
		then
			if ! read -r reason
			then
				break
			fi
			reason="$(echo "$reason" | $SED 's/^[^>]*> *//')"
			do_message "Tree conflict in " -n red
		else
			do_message "Unknown conflict in " -n red
		fi
		do_message "$file" -n standout
		if [ -n "$reason" ]
		then
			do_message ": " -n red
			do_message "$reason" yellow
		else
			do_message ":" red
		fi

		tickets=
		for rev in $revs
		do
			[ $rev $cmpop $limit ] && break
			if [ -n "$(do_svn log -q -v -r $rev "$local_root/$src" | $SED -n "0,/^Changed paths:/d;/^.... $(echo "/$src/$file" | $SED 's/\//\\\//g')/p")" ]
			then
				for ticket in $(extract_tickets "$(get_log_message "$src" $rev)" "$prefix")
				do
					echo "$tickets" | grep -q "\<$ticket\>" ||
						tickets+="$ticket "
				done
			fi
		done
		for ticket in $tickets
		do
			do_message "  possible conflict with $ticket: " -n
			do_message "$(get_ticket_title "$ticket")" yellow
		done

		if [ -n "$resolve" ]
		then
			resolve_conflict "$fqfile" <&3 || exit 1
		fi

		IFS=""
	done 3<&0 <<< "$3"
)
}

resolve_conflict()
{
	local answer=
	while [ "$answer" != d -a "$answer" != a -a "$answer" != r ]
	do
		do_message "(d)elete, (r)esolve interactively or (a)bort? " -n standout
		read answer
	done
	case $answer in
	d)
		svn rm --force "$1"
		svn resolve --accept working "$1"
		return 0
		;;
	r)
		svn resolve "$1" || return 1
		;;
	*)
		return 1
		;;
	esac
}