#!/bin/bash

# Setup main configuration and load preferences
function hydra_config_load {
  if [ -f "$HOME/.$NAME" ]; then
    echo "Converting legacy configuration scheme..."
    mv $HOME/.$NAME $HOME/.$NAME.tmp
    mkdir $HOME/.$NAME
    mv $HOME/.$NAME.tmp $CONFIG
  fi

  if [ ! -e "$CONFIG" ]; then
    echo "Creating $CONFIG..."
    mkdir `dirname $CONFIG`
    touch $CONFIG
    chmod 600 $CONFIG
    echo "# Hydra config file." > $CONFIG
    echo "" >> $CONFIG
  fi

  hydra_config_load_preferences
}

# Load config preferences
function hydra_config_load_preferences {
  # Load custom keyring preferences
  if [ ! -z "$PREFERENCES" ] && [ -f "$PREFERENCES" ]; then
    source $PREFERENCES
  fi
}

# Load a parameter from config
function hydra_config {
  if [ -z "$CONFIG" ]; then
    echo "Your have to set CONFIG variable in the code"
    exit 1
  elif [ -e "$CONFIG" ]; then
    grep -e "^$1=" $CONFIG | tail -n 1 | cut -d = -f 2 | sed -e 's/"//g' -e "s/'//g" | sed -e 's/ *#.*$//'
  else
    echo "Config file not found: $CONFIG"
    exit 1
  fi
}

# Check if there is a given action
function hydra_has_action {
 if [ -z "$ACTIONS" ]; then
   echo "Your have to set ACTIONS variable in the code"
   exit 1
 fi

 if [ -e "$ACTIONS/$1" ]; then
   true
 else
   false
 fi
}

# Execute an action
function hydra_exec {
  # Setup
  action="$1"
  basedir="$2"
  shift 2
  
  # Dispatch
  if hydra_has_action $action; then
    $ACTIONS/$action $basedir $*
  fi
}

# Set needed environment variables and do basic checks.
function hydra_set_env {
  if [ -z "$1" ]; then
    echo "Error: missing arguments for hydra_set_env"
    exit 1    
  fi
}

# Get a command argument
function hydra_get_command {
  # Aditional parameters
  COMMAND="$1"
  
  if [ -z "$COMMAND" ]; then
    hydra_action_usage command
    exit 1
  fi
}

# Run the action usage
function hydra_action_usage {
  if [ "`type -t "hydra_usage_$BASENAME"`" == "function" ]; then
    # Use custom action usage
    hydra_usage_$BASENAME
  else
    # Default usage
    echo "Usage: hydra|hydractl <command> [arguments]"
  fi
}

function hydra_dispatch {
  BASEDIR="`hydra_config $KEYRING`"

  # Dispatch
  if [ ! -z "$BASEDIR" ]; then
    shift 2
    hydra_exec $ACTION $BASEDIR $*
    exit $?
  else
    echo "No keydir configured for $KEYRING"
    exit 1
  fi
}