#!/bin/sh
#
# TODO: only for english - change this!
#

set -ue

# root directory of the cryptobox development environment
ROOT_DIR="$(dirname $(dirname $0))"

# retrieve these pages from the wiki
PAGES="CryptoBox CryptoBoxDev CryptoBoxKonzept CryptoBox CryptoBoxDevPreparation CryptoBoxDevCustomBuild CryptoBoxDevWorkFlow CryptoBoxDevValidation CryptoBoxDevCustomConfigure CryptoBoxDevBackground CryptoBoxDevKnownProblems"

# base URL
WIKI_HOST="https://systemausfall.org"
# the trailing slash is important
WIKI_URL=/toolforge/

CBOX_CGI="/cryptobox?action=doc\&page="

LANGUAGES="en de"

DEST_DIR="$ROOT_DIR/cbox-tree.d/usr/share/doc/cryptobox/html"
OFFLINE_DIR="$ROOT_DIR/cbox-tree.d/_offline/doc"
IMAGE_DIR="$ROOT_DIR/cbox-tree.d/var/www/cryptobox-img"
TMP_DIR=/tmp/$(basename $0)-$$.d

HEADER_FILE=doc_header.inc
FOOTER_FILE=doc_footer.inc

[ ! -e "$DEST_DIR" ] && echo "$DEST_DIR does not exist" && exit 1

for LANG in $LANGUAGES; do
	for PAGE in $PAGES; do
		PAGE_SRC="$WIKI_HOST$WIKI_URL$PAGE/$LANG"
		echo "Importing $PAGE/$LANG:"

		# replace sub-page-style '/' like moin does it (by '_2f')
		TMP_FILE=$TMP_DIR/${PAGE}.html
		mkdir -p "$TMP_DIR"

		echo "	downloading the page ..."
		wget --quiet --output-document="$TMP_FILE" "$PAGE_SRC" || { echo "Downloading ($PAGE_SRC) failed!"; exit 1; }

		# check if this moin page exists (by looking for the template selection)
		if grep -q "$WIKI_URL$PAGE/$LANG.action=edit&template=" "$TMP_FILE"
		  then	rm "$TMP_FILE"
				PAGE_SRC=$(dirname $PAGE_SRC)
				echo "	trying to download default language page instead"
				wget --quiet --output-document="$TMP_FILE" "$PAGE_SRC" || { echo "Downloading ($PAGE_SRC) failed!" >&2; exit 1; }
				# check, if there is even no default page
				grep -q "$WIKI_URL$PAGE/$LANG.action=edit&template=" "$TMP_FILE" && echo "This page ($PAGE_SRC) was not found!" >&2 && exit 1
		  fi

		echo "	removing header and footer ..."
		# break lines before start of content
		sed -i 's#<div [^>]* id="content" [^>]*>#_END_OF_HEADER_\n#' "$TMP_FILE"
		sed -i 's#<div id="footer">#\n_START_OF_FOOTER_#' "$TMP_FILE"
		# remove all lines before and after "body"
		sed -i '1,/_END_OF_HEADER_/d; /_START_OF_FOOTER_/,$d' "$TMP_FILE"

		echo "	removing link images (moin specific) ..."
		# remove inter-wiki images
		sed -i 's#<[^<]*moin-inter.png[^>]*>##g' "$TMP_FILE"
		# remove moin-www images
		sed -i 's#<[^<]*moin-www.png[^>]*> ##g' "$TMP_FILE"

		echo "	downloading requisites ..."
		wget --quiet --ignore-tags=a --no-clobber --page-requisites --convert-links --no-parent --no-directories --base="$WIKI_HOST$WIKI_URL" --directory-prefix="$TMP_DIR" --html-extension --force-html --input-file="$TMP_FILE" || { echo "Downloading requisites for ($PAGE_SRC) failed!"; exit 1; }

		echo "	adjusting links for requisites ..."
		find "$TMP_DIR" -type f | grep -v '\.html$' | while read a
		  do	fname=$(basename "$a")
			sed -i "s#=\"[^\"]*/$fname\"#=\"/cryptobox-img/$fname\"#g" "$TMP_FILE"
		 done

		echo "	adjusting wiki links ..."
		# redirect wiki links to cryptobox cgi
		sed -i "s#=\"$WIKI_URL\([^\.]*\)\"#=\"$CBOX_CGI\1\"#g" "$TMP_FILE"
		# do it twice - somehow, the "g" flag does not work (it should replace multiple occurrences on a line)
		sed -i "s#=\"$WIKI_URL\([^\.]*\)\"#=\"$CBOX_CGI\1\"#g" "$TMP_FILE"
		# remove language specific part of moin link
		for TLANG in $LANGUAGES
			do	sed -i "s#=\"$CBOX_CGI\(.*\)_2f$TLANG\"#=\"$CBOX_CGI\1\"#g" "$TMP_FILE"
		  done

		echo "	building static doc page"
		offline_file=$OFFLINE_DIR/$LANG/$(basename $TMP_FILE)
		mkdir -p "$OFFLINE_DIR/$LANG"
		cat "$OFFLINE_DIR/$HEADER_FILE" "$OFFLINE_DIR/$LANG/$HEADER_FILE" "$TMP_FILE" "$OFFLINE_DIR/$LANG/$FOOTER_FILE" "$OFFLINE_DIR/$FOOTER_FILE" >"$offline_file"
		sed -i "s#=\"$CBOX_CGI\([^\"]*\)\"#=\"\1.html\"#g" "$offline_file"
		# do it twice - this should not be necessary
		sed -i "s#=\"$CBOX_CGI\([^\"]*\)\"#=\"\1.html\"#g" "$offline_file"
		sed -i "s#=\"/cryptobox-img#=\"../../../var/www/cryptobox-img#g" "$offline_file"

		# split language specific part of moin link
		for TLANG in $LANGUAGES
			do	sed -i "s#=\"\([^/]*\)_2f${TLANG}.html\"#=\"../$TLANG/\1.html\"#g" "$TMP_FILE"
		  done

		# move cgi-doc
		mv "$TMP_FILE" "$DEST_DIR/$LANG"

		echo "	finished!"
	  done
  done

mv "$TMP_DIR"/* "$IMAGE_DIR"
rmdir "$TMP_DIR"