#! /usr/bin/env bash

himalaya_opts="--color=always"
w3m_opts=("-T" "text/html" "-o" "display_link_number=1" "-dump")

function accounts() {
  himalaya ${himalaya_opts[@]} accounts | \
    awk '/imap/ { print $1 }' | \
    sort | \
    fzf --exit-0 --select-1 --ansi --layout=reverse \
        --header="Accounts" \
        --preview="himalaya $himalaya_opts -a {} list -s 10" \
        --preview-window=right,80%
}

function emails() {
  if [ "$#" != "0" ]; then
    local acc=$1
    local size=${2-50}
    local w3m_cmd="w3m ${w3m_opts[@]}"

    local HIM_CMD="himalaya $himalaya_opts -a $acc list -s $size -w 150"
    local selected=$(
      FZF_DEFAULT_COMMAND="$HIM_CMD | grep '│'" \
      fzf --exit-0 --ansi --layout=reverse \
          --header-lines=1 \
          --header="Account: ${acc}" \
          --preview="
res=\$(himalaya $himalaya_opts -a $acc read -t html {1});
echo \$res | head -n 2;
echo -e "\\\\n\===============================================================================\\\\n";
echo \$res | tail -n +3 | ${w3m_cmd}
" \
          --preview-window=down,70% \
          --bind='ctrl-r:reload(eval $FZF_DEFAULT_COMMAND)'
    )
    echo $selected | awk '{ print $1 }'
  fi
}

while :
do
  acc=$(accounts)
  if [ "$acc" == "" ]; then
    break
  fi

  eid=$(emails $acc $@)
  if [ "$eid" != "" ]; then
    IFS= 
    res=$(himalaya $himalaya_opts -a $acc read -t html $eid)
    echo $res | head -n 2
    echo -e "\n===============================================================================\n"
    echo $res | tail -n +3 | w3m ${w3m_opts[@]}
    break
  fi
done