#!/bin/sh

# makros binary
MAKROS=./makros/makros

if ! find $MAKROS 2>/dev/null >/dev/null; then
    echo "couldn't find the makros binary"
    exit 1
fi

# Strip the CSS file of whitespace to reduce file size
echo "Generating CSS"
$MAKROS resources/style-formatted.css | tr -d " \t\n\r" > resources/style.css

# Generate HTML pages from Writan sources
echo "Generating pages"
for file in site-src/*; do
    bn=$(basename $file .wtn)

    incoming=$(grep -i "{$bn}\|{$bn " site-src/* \
        | sed "s/\..*$//g" \
        | sed "s/^.*\///g" \
        | sed "s/^/{/g" \
        | sed "s/$/}/g" \
        | tr '\n' ' ' \
        | sed "s/$/\n\n/g")

    if [ -z "$incoming" ]; then
        printf "(o)"
    fi
    echo "\t$file -> site/$bn.html"

    tmp=$(mktemp)
    # if the file has macros, expand them
    if grep "#makro" $file >/dev/null; then
        $MAKROS $file > $tmp
    else
        cp $file $tmp
    fi

    # last changed section
    if git log | grep "\w*\[$bn\]" > /dev/null; then
        git log --grep="\[$bn\]" --format="%as:%s" \
            | sed "s/\[.*\]//g" \
            | sed "s/^/> /g" \
            | head -n 5 \
            | sed "s/$/\n/g" >> $tmp
    fi

    # backlinks
    if [ ! -z "$incoming" ]; then
        printf "\n_Incoming:_ $incoming\n" >> $tmp
    fi

    ./format $tmp site/$bn.html
    rm $tmp
done

# Generate the site index
indexfile=site/site-index.html
cat resources/header.html > $indexfile
echo "Generating full site index"
echo "<h1>Site index</h1>" >> $indexfile
for file in site/*; do
    bn=$(basename $file .html)
    echo "<p><a href=\"$bn.html\">$bn</a>" >> $indexfile
done
cat resources/footer.html >> $indexfile

# Generate list of last changed files
lastchanged=site/last-changed.html
cat resources/header.html > $lastchanged
echo "Generating last changed page"
echo "<h1>Last changed pages</h1>" >> $lastchanged
echo "<p>Times are relative to the date the site was last generated, $(date -I)." >> $lastchanged
sorted=$(mktemp)
for file in site-src/*; do
    printf "%s %s\n" $(git log -n 1 --pretty=format:%ct $file) $file
done | sort -r > $sorted

while read line; do
    file=$(echo $line | awk '{print $2}')
    relative=$(git log -n 1 --pretty=format:%cr $file)
    # instead of showing "x hours/minutes/seconds ago", show "today"
    if echo $relative | grep "hour" >/dev/null \
       || echo $relative | grep "minute" >/dev/null \
       || echo $relative | grep "second" >/dev/null; then
        relative="today"
    fi
    bn=$(basename $file .wtn)
    echo "<p><a href=\"$bn.html\">$bn</a> - $relative"
done < $sorted >> $lastchanged

rm $sorted
cat resources/footer.html >> $lastchanged