#!/usr/bin/env bash

###
### *nuxr-nuxsh* is wrapped bash interpreter for *nux-env* enhanced bash scripts
### and provides out of the box support for command-style scripts (similar in
### usage such as apt, git) with following features out of the box:
###
###   task selection::
###        Automaticly selects correct tasks, displays help if
###        task does not exists.
###   logging::
###        Using *nux.log* function and changing output using
###       *debug*, *trace* prefixes
###   help display::
###        Automated help display when no arguments are provided.
###        Uses source comments as source for help.
###
###
### # Writing nux-runner scripts
###
### *nux-runner* scripts are basicly bash scripts with some additional conventions.
###
###
###
###
###
### 1. Shebang::
###    Shebang (*#!*) at the start of file is *#!/usr/bin/env nuxr-nuxsh*
### 2. Tasks::
###    Script usually does only defines functions in form task {taskname}
###    where taskname
### ## Defining a task
###
###
###
###


readonly NUX_RUNNER_BIN_DIR=$(dirname $(realpath  ${BASH_SOURCE[0]}))
source $NUX_RUNNER_BIN_DIR/../inc/nux.inc.sh
readonly NUX_RUNNER=$NUX_RUNNER_BIN_DIR/nuxr-nuxsh;

nux.use nuxr
nux.use nux.cfg

##
## Additional commands provided by *nux-runner*:
### *nux-runner* automaticly provides following tasks to any script it executes:

##



##    debug:: <task> [<task arguments>]
##      Runs specified task with debug messages enabled.
task.debug() {
  nux.log.level debug
  nuxr.run "$@"
}

##    trace:: <task> [<task arguments>]
##      Runs specified task with debug & trace enabled.
task.trace() {
  nux.log.level trace
  nuxr.run "$@"
}

##    help:: [command]
##      Display help for command or topic if specified. Otherwise displays
##      documentation.
task.help() {
  nuxr.task.help "$@"
}

##    config:: [type] name [value]
##      Reads or writes application specific configuration option.
###
###     There are 3 *types* of configuration:
###       dist::
###         Distribution provided configuration. Read-only configuration.
###       global::
###         Global (user-specific) provided configuration. This configuration is
###         usually stored in *~/.config/{app-name}/config.yml*
###       local::
###         Local configuration.
###
###     The resulting application configuration is merger of these three (if available)
###     with following preference (most-specific one):
###         local, global, dist
###
task.config() {
  nux.log trace "global is" $(nux.cfg.dir.global)
  nux.log trace "dist is" $(nux.cfg.dir.dist)
  nux.log trace "local is" $(nux.cfg.dir.local)

  if [ "$#" -ge 3 ] ; then
    nux.cfg.write "$@"
  else
    nux.cfg.read "$@";
  fi
}

task.() {
  task.help
}


##    interactive::
##      Executes interactive application shell.
task.interactive() {
  nuxr.task.interactive "$@"
}
###
###

if [ "$NUX_RUNNER" = "$(realpath "$0")" ]
then
	NUX_SCRIPT=$1;
	shift;
else
	NUX_SCRIPT=$0;
	NUX_NO_INCLUDE="no include";
fi

if [ -n  "$NUX_SCRIPT" ]; then
  # Determines script
  NUX_SCRIPT_DIR=$(dirname "$NUX_SCRIPT")
  NUXR_APP_BIN=$(realpath "$NUX_SCRIPT")
  NUXR_APP_BIN_DIR=$(dirname "$NUXR_APP_BIN")
  NUXR_APP_DIR=$(dirname "$NUXR_APP_BIN_DIR")
  NUXR_APP_NAME=$(basename "$NUX_SCRIPT")

  NUX_SCRIPTNAME=$(basename "$NUX_SCRIPT")

  NUX_APP_NAME="${NUX_APP_NAME:=$NUXR_APP_NAME}"
  NUX_APP_DIR="${NUX_APP_DIR:=$NUXR_APP_DIR}"

  nux.log trace "NUX_SCRIPT env: " $(set | grep NUX_SCRIPT)
  if [ -z "$NUX_NO_INCLUDE" ]
  then
  	nux.log debug  "Including script: $NUX_SCRIPT"
    nux.log trace "NUX_SCRIPT env: " $(set | grep NUX_SCRIPT)

    compiledir=${TMPDIR:=/tmp}
    compilefile=$(realpath "$NUX_SCRIPT" | md5sum | cut -d" " -f1)
    #FIXME: If App in NUX-ENV, use global cache and not generated naming.
    if [ "$NUX_ENV_DIR" = "$NUXR_APP_DIR" ]; then
      compiledir="$NUX_CACHE_DIR/bin"
      compilefile="$NUXR_APP_NAME"
    fi
    compilefile="$compiledir/$compilefile.nuxr.nuxsh"
    nux.log debug "Compiled script:" $compilefile
    nux.nuxsh.use "$NUX_SCRIPT" "$compilefile";
    NUX_NO_INCLUDE="no-include"
  fi



  nuxr.main "$@"
else

  echo  Usage: nux-runner [script] [task] [options]
  echo
  grep "^\#\#" "$NUX_RUNNER" | sed -re "s/^#+ ?(.*)/\1/gi"  | nux.help.shelldoc
  echo
fi