#!/bin/bash
readonly EXPLORER_PATH=$(dirname $(dirname $(readlink -f "$0")))
NODE_PATH=""
MODE=""
# Check if parameters were passed into the script
if [ -n "${1}" ]; then
  # At least one parameter has been passed in
  case ${1} in
    "update")
      # Index update
      MODE="index update"
      ;;
    "check")
      # Index check
      MODE="index check"

      # Check if the next parameter exists
      if [ -n "${2}" ]; then
        # Add onto the check cmd
        MODE="${MODE} ${2}"
      fi
      ;;
    "reindex")
      # Index reindex
      MODE="index reindex"
      ;;
    "reindex-rich")
      # Index reindex-rich
      MODE="index reindex-rich"
      ;;
    "reindex-txcount")
      # Index reindex-txcount
      MODE="index reindex-txcount"
      ;;
    "reindex-last")
      # Index reindex-last
      MODE="index reindex-last"
      ;;
    "market")
      # Market update
      MODE="market"
      ;;
    "peers")
      # Peers update
      MODE="peers"
      ;;
    "masternodes")
      # Masternodes update
      MODE="masternodes"
      ;;
    *)
      # Check if this is a file that exists on the filesystem
      if [ -f ${1} ]; then
        # The file exists. Assume this is the path to node
        NODE_PATH="${1}"
      fi
      ;;
  esac
  # Check if the mode is already set
  if [ -z "${MODE}" ]; then
    # Mode is not set so check if the next parameter exists
    if [ -n "${2}" ]; then
      # Determine which mode this last parameter is
      case ${2} in
        "update")
          # Index update
          MODE="index update"
          ;;
        "check")
          # Index check
          MODE="index check"

          # Check if the next parameter exists
          if [ -n "${3}" ]; then
            # Add onto the check cmd
            MODE="${MODE} ${3}"
          fi
          ;;
        "reindex")
          # Index reindex
          MODE="index reindex"
          ;;
        "reindex-rich")
          # Index reindex-rich
          MODE="index reindex-rich"
          ;;
        "reindex-txcount")
          # Index reindex-txcount
          MODE="index reindex-txcount"
          ;;
        "reindex-last")
          # Index reindex-last
          MODE="index reindex-last"
          ;;
        "market")
          # Market update
          MODE="market"
          ;;
        "peers")
          # Peers update
          MODE="peers"
          ;;
        "masternodes")
          # Masternodes update
          MODE="masternodes"
          ;;
      esac
    elif [ -n "${NODE_PATH}" ]; then
      # Node path was specified but no mode, so default to 'index update' mode 
      MODE="index update"
    fi
  fi
else
  # No parameters specified so default to 'index update' mode
  MODE="index update"
fi
# Check if the mode is set
if [ -n "${MODE}" ]; then
  # Mode is set
  # Check if the desired mode requires a lock
  if [ "${MODE}" != "peers" ] && [ "${MODE}" != "masternodes" ]; then
    # A lock is required
    # Check if this is a reindex
    if [ "${MODE}" = "index reindex" ]; then
      # Prompt for the reindex
      echo "You are about to delete all blockchain data (transactions and addresses)"
      echo "and resync from the genesis block."
      echo "Are you sure you want to do this? [y/n]: ";
      read -p "" REINDEX_ANSWER
      # Determine if the reindex should proceed
      case "$REINDEX_ANSWER" in
        y|Y|yes|Yes|YES) ;;
        *) echo "Process aborted. Nothing was deleted." && exit ;;
      esac
    fi
    # Check if the script is already running (tmp/index.pid file already exists)
    if [ -f "${EXPLORER_PATH}/tmp/index.pid" ]; then
      # The tmp/index.pid file exists. Check if the process is actually still running
      ps -p `cat ${EXPLORER_PATH}/tmp/index.pid` > /dev/null
      if [ $? -eq 0 ]; then
        # Script is running so the data is locked and we must exit now and try again later
        echo "Script already running.."
        exit 1
      else
        # Script is not actually running so we can delete the lock file
        rm "${EXPLORER_PATH}/tmp/index.pid"
      fi
    fi
  fi
  # Check if the node path was specified
  if [ -z "${NODE_PATH}" ]; then
    # Node path not specified so lookup using the 'which' cmd
    eval "cd ${EXPLORER_PATH} && $(which node) scripts/sync.js ${MODE}"
  else
    # Node path specified
    eval "cd ${EXPLORER_PATH} && ${NODE_PATH} scripts/sync.js ${MODE}"
  fi
else
  # Mode not set so load the sync script without specifying the mode to return the usage options 
  eval "cd ${EXPLORER_PATH} && $(which node) scripts/sync.js"
fi