#!/bin/bash
#
# Check the overall status of your work.
#

# Parameters
BASENAME="`basename $0`"

# Usage
function status_usage {
  echo "usage: $BASENAME [-l|--long] [-d|--delay N] [project]"

  if [ -z "$1" ]; then
    exit 1
  else
    exit $1
  fi
}

# See https://stackoverflow.com/questions/2721946/cross-platform-getopt-for-a-shell-script#4300224
function status_options {
  getopt -T > /dev/null
  if [ $? -eq 4 ]; then
    # GNU enhanced getopt is available
    ARGS=`getopt --name "$BASENAME" --long loop,delay: --options ld: -- "$@"`
  else
    # Original getopt is available (no long option names, no whitespace, no sorting)
    ARGS=`getopt ld: "$@"`
  fi

  if [ $? -ne 0 ]; then
    echo "$BASENAME: usage error" >&2
    status_usage 2
  fi

  eval set -- $ARGS

  while [ $# -gt 0 ]; do
    case "$1" in
      l|--loop)
        LOOP="yes";;
      d|--delay)
        DELAY="$2"
        shift;;
      --)
        shift
        break;;
      *)
        status_usage
        ;;
    esac
    shift
  done

  if [ $# -gt 0 ]; then
    PROJECT="$1"
    shift
  fi
}

# Calculate timestamp delta from a file
function status_file_changed_delta {
  local file="$1"

  if [ -z "$file" ] || [ ! -e "$file" ]; then
    echo 0
  fi

  local file_timestamp="`stat -c '%Z' $file`"
  local timestamp="`date +%s`"

  echo $(( timestamp - file_timestamp ))
}

# Run command if a file is older than a given number of seconds
function status_run_if_file_older_than {
  local file="$1"
  local interval="$2"
  local run="0"

  shift 2

  # Run command if there's still no file to test
  if [ ! -e "$file" ]; then
    run="1"
  else
    local age="`status_file_changed_delta $file`"
    local interval="3600"

    # Run command only when file is older or equal the interval
    if (( $age >= $interval )); then
      run="1"
    fi
  fi

  # Run if criteria matches
  if [ "$run" == "1" ]; then
    $*
  fi
}

# Run status
function status_run {
  if [ ! -z "$PROJECT" ]; then
    # Check the status of the given project
    cd $PROJECT &> /dev/null && git status
  elif git status &> /dev/null; then
    # Check the status of the current project
    mr status
  else
    # Ensure we are in the home folder
    cd

    # Check your reminders
    if which remind &> /dev/null && [ -e "$HOME/.reminders" ]; then
      remind ~/.reminders | grep -iv '^no reminders.$' # | tr '[:upper:]' '[:lower:]'
    fi

    # Update your mrconfig and check all registered repositories
    if which mr &> /dev/null; then
      local mrconfig="$HOME/.custom/mrconfig-automatic"

      status_run_if_file_older_than $mrconfig 3600 mrconfig-updater

      # Pipe through cat so we don't have to deal with mr's dynamic output weirdness
      #mr -m status | cat

      # Replace eventual "/mnt/crypt/home/$USER" with "~/" from output
      # Piping through sed also handles mr's dynamic output weirdness
      mr -m status | sed -e "s|/mnt/crypt/home/$USER/|~/|" -e "s|$HOME|~|"
    fi

    # Use this as an opportunity to save our configs
    if which git-config-save &> /dev/null; then
      git config-save --sometimes &> /dev/null
    fi

    # Check your TODO lists, filtering only important tasks
    # Convention here is to use uppercase "IMPORTANT", to be explicit and avoid false positives
    todo list IMPORTANT

    # Collected items that need to be moved somewhere else
    #collector count
    collector list

    # Check if you have mails to send
    postponed

    # Check unread mails
    unread-mails

    # Alarms set
    #xalarm list

    # Check for spool files
    if [ -e "$HOME/temp/log/spool.md" ] && [ "`wc -l $HOME/temp/log/spool.md | cut -d ' ' -f 1`" != "0" ]; then
      echo "Spool file not empty: $HOME/temp/log/spool.md"
    fi

    # Check if are dangling downloaded files
    if [ -e "$HOME/load" ] && [ ! -z "`ls -1 ~/load/`" ]; then
      # Print a newline if needed depending of the output of the previous commands
      if [ ! -z "`postponed`" ] || [ ! -z "`unread-mails`" ] || [ ! -z "`collector list`" ]; then
        echo ""
      fi

      echo "Dangling files at ~/load:"
      echo ""
      ls -lh ~/load/
    fi
  fi
}

# Options
status_options $@

# Dispatch
if [ "$LOOP" == "yes" ]; then
  PROJECT=""

  if [ -z "$DELAY" ]; then
    DELAY="60"
  fi

  while true; do
    clear
    status_run
    sleep $DELAY
  done
else
  status_run
fi