#!/bin/sh

base_template () {
    body_file=$(mktemp)
    cat > "$body_file"
    sed '/<!-- BODY -->/r '"$body_file" base.template.html
}

base_template_link () {
    link_href="$1"
    case $link_href in
        *.css)
            link_rel="stylesheet"
            link_type="text/css"
            ;;
        *.png)
            link_rel="icon"
            link_type="image/png"
            ;;
        *)
            echo Invalid link file
            exit 1
            ;;
    esac
    sed "/<!-- HEAD -->/i\
        <link rel=\"$link_rel\" type=\"$link_type\" href=\"$link_href\"/>"
}

# Setup
blog_path=blog
mkdir -p "$blog_path"
base_template < index.template.html |
    base_template_link 'static/img/favicon.png' |
    base_template_link 'static/css/index.css' |
    base_template_link 'static/css/style.css' > index.html
base_template < school.template.html |
    base_template_link 'static/img/favicon.png' |
    base_template_link 'static/css/style.css' > school.html
base_template < about.template.html |
    base_template_link 'static/img/favicon.png' |
    base_template_link 'static/css/style.css' > about.html

cp rss.template.xml rss.xml

# Generate blog posts
for post_path in "$blog_path"/*.md
do
    post_dst_path=$(echo "$post_path" | sed 's_.md_.html_')

    pandoc -f markdown -t html < "$post_path" |
        sed -e '1i<div class="article">' -e '$a</div>' |
        base_template |
        base_template_link '../static/img/favicon.png' |
        base_template_link '../static/css/blog.css' |
        base_template_link '../static/css/style.css' > "$post_dst_path"

    # Add blog artcle link to the index.html
    title=$(grep '^# .*$' -m 1 "$post_path" | cut -c 2-)
    [ -z "$title" ] && echo "post $post_path doesn't have a title" && title=$post_path

    sed -i "/<!-- BLOGINDEX -->/ a\
        <li><a href=\"$post_dst_path\">$title</a></li>" index.html

    post_date=$(date '+%a, %d %b %Y %H:%M:%S %z' -d "$(stat -c '%w' "$post_path")")
    sed -i "/<!-- ITEM -->/ a\
        <item> \
            <title>$title</title> \
            <pubDate>$post_date</pubDate> \
            <guid>https://cacharle.xyz/$post_dst_path</guid> \
            <link>https://cacharle.xyz/$post_dst_path</link> \
            <description>Open this entry in your browser to see the content</description> \
        </item>" rss.xml

    echo "Generated post at $post_dst_path"
done


# Generate utilities
for util_path in utils/*
do
    title=$(basename "$util_path" | tr '_' ' ')
    sed '$ a <script type="text/javascript" src="script.js"></script>' < "$util_path/index.template.html" |
        base_template |
        base_template_link '../../static/img/favicon.png' |
        base_template_link '../../static/css/style.css' |
        base_template_link 'style.css' > "$util_path/index.html"
    sed -i'' "/<!-- UTILSINDEX -->/ a\
        <li><a href=\"$util_path/\">$title</a></li>" index.html

    echo "Generated utility at $util_path/index.html"
done


base_template < walks/index.template.html |
    base_template_link '/static/img/favicon.png' |
    base_template_link '../static/css/style.css' |
    base_template_link 'https://unpkg.com/leaflet@1.7.1/dist/leaflet.css' |
    base_template_link 'style.css' > walks/index.html

[ ! -d walks/maps ] && mkdir walks/maps

for gpx_path in walks/gpx/*
do
    [ ! -f "$gpx_path" ] && continue
    map_dst=$(basename "$gpx_path" | cut -d . -f 1 | tr ' ' '-')
    map_dst_path="walks/maps/$map_dst.html"

    base_template < walks/map.template.html |
        base_template_link '/static/img/favicon.png' |
        base_template_link '/static/css/style.css' |
        base_template_link '/walks/style.css' |
        base_template_link 'https://unpkg.com/leaflet@1.7.1/dist/leaflet.css' |
        sed "/<!-- GPXLINK -->/ a <a href=\"/$gpx_path\">$(basename "$gpx_path")</a>" > $map_dst_path

    sed -i'' "/<!-- MAPINDEX -->/ a\
        <li> \
          <a href=\"/$map_dst_path\" class=\"view-on-map\">view on map</a> \
          <a href=\"/$gpx_path\">$(basename "$gpx_path")</a> \
        </li>" walks/index.html
    echo "Generated walk at $gpx_path"
done

for notebook_path in notebooks/*.ipynb
do
    notebook_dst_path=$(echo "$notebook_path" | sed 's_.ipynb_.html_')
    jupyter-nbconvert --to html "$notebook_path"

    sed -i'' "/<!-- NOTEBOOKINDEX -->/ a\
        <li> \
        <a href=\"$notebook_dst_path\">$(basename $notebook_path | cut -d . -f 1 | tr '-' ' ')</a> \
        <a href=\"$notebook_path\">   ($(basename $notebook_path))</a> \
        </li>" index.html
done