#!/usr/bin/env bash
#===============================================================================
#   Author: Wenxuan
#    Email: wenxuangm@gmail.com
#  Created: 2018-04-06 12:12
#===============================================================================
get_fzf_options()
{
  local fzf_options
  local fzf_default_options='-w 100% -h 50% --multi -0 --no-preview'
  fzf_options="$(tmux show -gqv '@fzf-url-fzf-options')"
  [ -n "$fzf_options" ] && echo "$fzf_options" || echo "$fzf_default_options"
}

fzf_filter()
{
  eval "fzf-tmux $(get_fzf_options)"
}

custom_open=$3
open_url()
{
  if [[ -n $custom_open ]]; then
    $custom_open "$@"
  elif hash xdg-open &> /dev/null; then
    nohup xdg-open "$@"
  elif hash open &> /dev/null; then
    nohup open "$@"
  elif [[ -n $BROWSER ]]; then
    nohup "$BROWSER" "$@"
  fi
}

limit='screen'
[[ $# -ge 2 ]] && limit=$2

if [[ $limit == 'screen' ]]; then
  content="$(tmux capture-pane -J -p -e | sed -r 's/\x1B\[[0-9;]*[mK]//g'))"
else
  content="$(tmux capture-pane -J -p -e -S -"$limit" | sed -r 's/\x1B\[[0-9;]*[mK]//g'))"
fi

urls=$(echo "$content" | grep -oE '(https?|ftp|file):/?//[-A-Za-z0-9+&@#/%?=~_|!:,.;]*[-A-Za-z0-9+&@#/%=~_|]')
wwws=$(echo "$content" | grep -oE '(http?s://)?www\.[a-zA-Z](-?[a-zA-Z0-9])+\.[a-zA-Z]{2,}(/\S+)*' | grep -vE '^https?://' | sed 's/^\(.*\)$/http:\/\/\1/')
ips=$(echo "$content" | grep -oE '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}(:[0-9]{1,5})?(/\S+)*' | sed 's/^\(.*\)$/http:\/\/\1/')
gits=$(echo "$content" | grep -oE '(ssh://)?git@\S*' | sed 's/:/\//g' | sed 's/^\(ssh\/\/\/\)\{0,1\}git@\(.*\)$/https:\/\/\2/')
gh=$(echo "$content" | grep -oE "['\"]([_A-Za-z0-9-]*/[_.A-Za-z0-9-]*)['\"]" | sed "s/['\"]//g" | sed 's#.#https://github.com/&#')

if [[ $# -ge 1 && $1 != '' ]]; then
  extras=$(echo "$content" | eval "$1")
fi

items=$(
  printf '%s\n' "${urls[@]}" "${wwws[@]}" "${gh[@]}" "${ips[@]}" "${gits[@]}" "${extras[@]}" \
    | grep -v '^$' \
    | sort -u \
    | nl -w3 -s '  '
)
[ -z "$items" ] && tmux display 'tmux-fzf-url: no URLs found' && exit

fzf_filter <<< "$items" | awk '{print $2}' \
  | while read -r chosen; do
    open_url "$chosen" &> "/tmp/tmux-$(id -u)-fzf-url.log"
  done