#!/bin/bash -e

# Source debconf library.
. /usr/share/debconf/confmodule

# Establish the preliminaries.
db_version 2.0
db_capb backup

# Use a state machine to allow jumping back to previous questions.
STATE=10

while [ "$STATE" != 0 -a "$STATE" != 90 ]; do
	case "$STATE" in
	10)
		# First ask user which installation way he wants
		# if the mysql default file doesn't exists, only Manual install is available.
		if [ ! -f /etc/mysql/debian.cnf ]; then
			db_input high bugzilla/bugzilla_installation_way_single || true
			db_go || true
			db_get bugzilla/bugzilla_installation_way_single || true
		else 
			db_input high bugzilla/bugzilla_installation_way || true
			db_go || true
			db_get bugzilla/bugzilla_installation_way || true
		fi
		case "$RET" in
			"Automatic")
				# as bugzilla/bugzilla_installation_way  
				# is set to Automatic, postinst will try 
				# to do the stuff, but first we have to ask
				# for bugziall admin name and so on :
				STATE=60
				
			;;
			
			"Manual")
				# Let's do all what we did before.
				STATE=20
			;;
			
			"Later")
				# Here we just stop the process and postinst won't do 
				# anything. User will have to run dpkg-reconfigure
				# when he is ready.
				exit 0
			;;
		esac
	;;

	20)
		#will we need an admin access to the database
		db_input high bugzilla/mysql_need_root || true
		if db_go; then
			db_get bugzilla/mysql_need_root || true

			NEED_ADMIN=$RET
			
			if [ "$NEED_ADMIN" = "true" ]; then
				STATE=30
			else
				STATE=40
			fi
		else
			STATE=10
		fi
	;;

	30)
		#pass this state if admin access in not needed

		if [ "$NEED_ADMIN" = "false" ]; then
			#the only way to be here is by back since in
			#foward mode you pass directly from 1 to 3
			STATE=20
			continue
		fi
		
		#get the admin user name and passord
		db_beginblock
		db_input high bugzilla/mysql_root_name  || true
		db_input high bugzilla/mysql_root_pwd || true
		db_endblock

		if db_go; then
			db_get bugzilla/mysql_root_name || true
			if [ "$RET" = "" ]; then
				#mysql admin user could not be empty
				#TODO have an explicative note of the error
				db_reset bugzilla/mysql_root_name || true
				continue
			fi
			
			STATE=40
		else
			STATE=20
		fi	
	;;

	40)
		db_beginblock
		db_input high bugzilla/mysql_host || true
		db_input high bugzilla/mysql_port || true
		db_input high bugzilla/mysql_name || true
		db_endblock

		if db_go; then
			for FIELD in mysql_host mysql_port mysql_name; do
				db_get bugzilla/$FIELD || true
				if [ "$RET" = "" ]; then
					#none of theres field should be empty
					db_reset bugzilla/$FIELD 
					continue 2 
				fi
			done
			STATE=50
		else
			STATE=30
		fi
	;;

	50)
		db_fget bugzilla/mysql_user_pwd seen
		if [ "$RET" = "true" ]; then
			db_get bugzilla/mysql_user_pwd || true
			db_set bugzilla/pwd_check "$RET"
		else
			db_set bugzilla/pwd_check ""
		fi
		db_beginblock
		db_input high bugzilla/mysql_user || true
		#### If the password question is skipped we do not check it
		if db_input high bugzilla/mysql_user_pwd || [ ! "$?" = "30" ] ; then  
			#### If we haven't admin access there will be no user creation
		   	if [ "$NEED_ADMIN" = "true" ] ; then
				db_input high bugzilla/pwd_check || true
			fi

		fi	
		db_endblock
			
		if db_go; then
			db_get bugzilla/mysql_user || true
			if [ "$RET" = "" ]; then
				#mysql admin user could not be empty
				#TODO have an explicative note of the error
				db_reset bugzilla/mysql_user
				continue				
			fi
			
			db_get bugzilla/mysql_user_pwd || true
			#### If we haven't admin access there will be no user creation
		   	if [ "$NEED_ADMIN" = "true" ] ; then
				PWD=$RET
				db_get bugzilla/pwd_check || true
				if [ "$RET" != "$PWD" ]; then
					#TODO have an explicative note of the error
					db_reset bugzilla/pwd_check
					db_reset bugzilla/mysql_user_pwd
					continue
				fi
			fi
			STATE=60
		else
			STATE=40
		fi
	;;

	60)
		db_fget bugzilla/bugzilla_admin_pwd seen
		if [ "$RET" = "true" ]; then
			db_get bugzilla/bugzilla_admin_pwd || true
			db_set bugzilla/pwd_check "$RET"
		else
			db_set bugzilla/pwd_check ""
		fi
		db_beginblock
		db_input high bugzilla/bugzilla_admin_name || true
		db_input high bugzilla/bugzilla_admin_real_name || true
		#### If the password question is skipped we do not check it
		if db_input high bugzilla/bugzilla_admin_pwd || [ ! "$?" = "30" ] ; then  
			db_input high bugzilla/pwd_check || true
		fi	
		db_endblock

		if db_go; then
			for FIELD in bugzilla_admin_name bugzilla_admin_real_name; do
				db_get bugzilla/$FIELD || true
				if [ "$RET" = "" ]; then
					#none of theres field should be empty
					db_reset bugzilla/$FIELD
					continue 2 
				fi
			done
			
			db_get bugzilla/bugzilla_admin_pwd || true
			PWD=$RET
			db_get bugzilla/pwd_check || true
			if [ "$RET" != "$PWD" ]; then
				db_reset bugzilla/bugzilla_admin_pwd
				db_reset bugzilla/pwd_check
				continue
			fi
			STATE=70
		else
			STATE=50
		fi
	;;
	70)
		# As cgi as been moved from /usr/lib/cgi-bin to
		# /usr/lib/cgi-bin/bugzilla, if /var/lib/bugzilla/web/index.html
		# have been changed this version will be keep back with wrong links
		# so I warm user if md5sum doesn't match old index.html version 
		# (this is in case of a preconfigure script) nor the current version
		# (in case of configure)

		if dpkg --compare-versions "$2" le-nl "2.13+cvs20010709-4"; then
			if echo '3d7df628e56b3b76a57cb7a6f7c91934  /var/lib/bugzilla/web/index.html' | md5sum -c 2>&- \
			|| echo 'b195bf3871949f2e123741320e8d06e7  /var/lib/bugzilla/web/index.html' | md5sum -c 2>&-;then
		   		STATE=80
			else
				db_input high bugzilla/index_upgrade1 || true
				if db_go; then 
					STATE=80
				else
					STATE=60
				fi
			fi
		else
		   	STATE=80
		fi
	;;
	80)
		#Since 2.16rc1 bugzilla use html template even for index so now index.htm only
		#refesh to /cgi-bin/bugzilla/index.cgi. As administrator may have make some change
		#on it, it is nice to inform him that his change will be lost and he had to make
		#them again in a copy of /usr/share/bugzilla/template/en/default/index.html.tmpl
		#that should go in /var/lib/bugzilla/template/en/custom.
		if dpkg --compare-versions "$2" lt-nl "2.16rc1-2"; then
			if echo 'b195bf3871949f2e123741320e8d06e7  /var/lib/bugzilla/web/index.html' | md5sum -c 2>&- \
			|| echo 'dd5dfdb92fe5013a80e3c645d0610e00  /var/lib/bugzilla/web/index.html' | md5sum -c 2>&-;then
		   		STATE=90
			else
				db_input high bugzilla/index_upgrade2 || true
				if db_go; then 
					STATE=90
				else
					STATE=70
				fi
			fi
		else
		   	STATE=90
		fi
	;;
	esac

done

db_reset bugzilla/pwd_check