#!/usr/bin/env bash
[[ " logs help logs:help " == *" $1 "* ]] || exit "$DOKKU_NOT_IMPLEMENTED_EXIT"
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
source "$(dirname "$0")/functions"
source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
source "$PLUGIN_AVAILABLE_PATH/config/functions"

case "$1" in
  logs)
    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
    APP="$2"; verify_app_name "$2"
    APP_ROOT="$DOKKU_ROOT/$APP"
    COLORS=(36 33 32 35 31)

    if ! (is_deployed "$APP"); then
      echo "Application's container not found"
      exit 1
    fi

    shift 2;
    TEMP=$(getopt -o htqn:p: --long help,tail,quiet,num:,ps: -n 'dokku logs' -- "$@")
    if [[ $? != 0 ]]; then usage >&2 ; exit 1 ; fi
    eval set -- "$TEMP"

    DOKKU_LOGS_LINE_NUMBERS="100"
    while true; do
        case "$1" in
            -t|--tail) DOKKU_LOGS_ARGS+="--follow "; shift ;;
            -n|--num) DOKKU_LOGS_LINE_NUMBERS="$2"; shift 2 ;;
            -p|--ps) DOKKU_LOGS_ONLY_PROCESS="$2"; shift 2 ;;
            -q|--quiet) DOKKU_LOGS_NO_PRETTY_PRINT="true"; shift ;;
            --) shift; break ;;
            *) echo "Internal error"; exit 1;;
        esac
    done

    if [[ -n $DOKKU_LOGS_ONLY_PROCESS ]]; then
      CONTAINERS=("$APP_ROOT/CONTAINER.$DOKKU_LOGS_ONLY_PROCESS".*)
    else
      CONTAINERS=("$APP_ROOT"/CONTAINER.*)
    fi
    [[ -z $(stat -t "${CONTAINERS[0]}" 2>/dev/null) ]] && exit 0

    DOKKU_LOGS_ARGS+="--tail $DOKKU_LOGS_LINE_NUMBERS"
    ((MAX_INDEX=${#CONTAINERS[*]} - 1)) || true
    for i in ${!CONTAINERS[*]}; do
      DYNO=$(echo "${CONTAINERS[i]}" | sed -r 's/.*CONTAINER\.(.*)/\1/')
      CID=$(< "${CONTAINERS[i]}")
      COLOR=${COLORS[i % ${#COLORS[*]}]}
      if [[ $DOKKU_LOGS_NO_PRETTY_PRINT == "true" ]]; then
        DOKKU_LOGS_CMD+="(docker logs $DOKKU_LOGS_ARGS $CID 2>&1)"
      else
        DOKKU_LOGS_PRETTY_PRINT_CMD="sed -r 's/^([^Z]+Z )/\x1b[${COLOR}m\1app[$DYNO]:\x1b[0m /gm'"
        DOKKU_LOGS_CMD+="(docker logs -t $DOKKU_LOGS_ARGS $CID 2>&1 | $DOKKU_LOGS_PRETTY_PRINT_CMD)"
      fi
      if [[ $i != "$MAX_INDEX" ]]; then
        DOKKU_LOGS_CMD+="& "
      else
        DOKKU_LOGS_CMD+="; "
      fi
    done
    bash -c "($DOKKU_LOGS_CMD)"
    ;;

  logs:help)
    usage
    ;;

  help)
    cat<<EOF
    logs <app> [-h] [-t] [-n num] [-q] [-p process], Show the last logs for an application
EOF
    ;;

  *)
    exit "$DOKKU_NOT_IMPLEMENTED_EXIT"
    ;;

esac