#!/bin/sh

. "${_EXEC:-${0%/*}}/cgilite/cgilite.sh"
. "${_EXEC}/cgilite/session.sh"
. "${_EXEC}/cgilite/file.sh"
. "${_EXEC}/cgilite/users.sh"

. "${_EXEC}/themes/default.sh"

CACHE_AGE=${CACHE_AGE:-1800}
export MD_MACROS="$_EXEC/macros"
export MD_HTML="${MD_HTML:-false}"

if [ "$(which awk)" ]; then
  md() { awk -f "$_EXEC/md_macros.awk" -f "$_EXEC/cgilite/markdown.awk"; }
elif [ "$(which busybox)" ]; then
  md() { busybox awk -f "$_EXEC/md_macros.awk" -f "$_EXEC/cgilite/markdown.awk"; }
else
  md() { cat; }
fi

wiki_text() {
  # Print source text of a wiki page
  # Get page from data or underlay dir
  local page="$(PATH "$1")"

  if [ -f "$_DATA/pages/$page/#page.md" ]; then
    cat -- "$_DATA/pages/$page/#page.md"
  elif [ -f "$_EXEC/pages/$page/#page.md" ]; then
    cat -- "$_EXEC/pages/$page/#page.md"
  else
    return 1
  fi
}

wiki() {
  # Print content of a wiki page
  # Get page from data or underlay dir, handle caching
  local page="$(PATH "$1")" md cache cachetime

  cache="$_DATA/pages/$page/#page.cache"
  if [ -f "$_DATA/pages/$page/#page.md" ]; then
    md="$_DATA/pages/$page/#page.md"
  elif [ -f "$_EXEC/pages/$page/#page.md" ]; then
    md="$_EXEC/pages/$page/#page.md"
  else
    return 1
  fi

  cachetime="$(stat -c %Y -- "$md" "$cache" 2>/dev/null)"

  if [ "${cachetime#*${BR}}" -gt "${cachetime%${BR}*}" \
    -a "${cachetime#*${BR}}" -gt "$((_DATE - CACHE_AGE))" ]; then
    cat "${cache}"
  else
    mkdir -p -- "$_DATA/pages/$page/"
    # Macros expect to find page directory as working dir
    ( cd -- "$_DATA/pages/$page/";
      md <"$md" |tee -- "${cache}.$$"
    )
    mv -- "${cache}.$$" "${cache}"
  fi
}

attachment() {
  local file="$(PATH "$1")"

  # TODO: deliver downscaled images, etc.
  if [ -f "$_DATA/pages/${file%/*}/#attachments/${file#*/}" ]; then
    FILE "$_DATA/pages/${file%/*}/#attachments/${file#*/}"
  elif [ -f "$_EXEC/pages/${file%/*}/#attachments/${file#*/}" ]; then
    FILE "$_EXEC/pages/${file%/*}/#attachments/${file#*/}"
  elif [ -d "$_DATA/pages/${file}/" -o -d "$_EXEC/pages/${file}" ]; then
    # path looks like a rogue page name (without trailing slash), so redirect
    REDIRECT "$_BASE/${file}/"
  else
    return 1
  fi
}

case "${PATH_INFO}" in
  /"[.]"/*)
    FILE "${_EXEC}/${PATH_INFO#/\[.\]}"
    ;;
  */)
    if [ -f "$_DATA/pages/$PATH_INFO/#page.md" \
      -o -f "$_EXEC/pages/$PATH_INFO/#page.md" ]; then
      theme_page "${PATH_INFO}"
    else
      theme_404
    fi
    ;;
  */"[login]")
    [ "$USER_NAME" ] \
    && REDIRECT "./" \
    || theme_login
    ;;
  */"[register]")
    theme_register
    ;;
  */"#"*)
    :  # TODO: Invalid page name
    ;;
esac

. "$_EXEC/page_edit.sh"
. "$_EXEC/attachment.sh"