#!/bin/bash

# Script to configure apostol web service.
#
# Script options:
# --help                   Display usage, overriding script execution.
#

# Initialize the build environment.
#==============================================================================
# Exit this script on the first build error.
#------------------------------------------------------------------------------
set -e

PROJECT_NAME=apostol-dm
BUILD_TYPE=Release
PULL_SELF=yes
PULL_GITHUB=yes

pop_directory()
{
    popd >/dev/null
}

push_directory()
{
    local DIRECTORY="$1"

    pushd "$DIRECTORY" >/dev/null
}

create_directory()
{
    local DIRECTORY="$1"

    rm -rf "$DIRECTORY"
    mkdir "$DIRECTORY"
}

display_heading_message()
{
    echo
    echo "********************** $@ **********************"
    echo
}

display_message()
{
    echo "$@"
}

display_error()
{
    >&2 echo "$@"
}

display_help()
{
    display_message "Usage: ./configure [OPTION]..."
    display_message "Manage the configure."
    display_message "Script options:"
    display_message "  --build-dir=<path>       Location of build files (default: $BUILD_DIR)."
    display_message "  --release                Release build (default)."
    display_message "  --debug                  Debug build."
    display_message "  --update                 Update build."
    display_message "  --not-pull-self          Not pull self."
    display_message "  --not-pull-github        Not pull from GitHub."
    display_message "  --help                   Display usage, overriding script execution."
    display_message ""
}

display_configuration()
{
    display_message "Configuration."
    display_message "--------------------------------------------------------------------"
    display_message "PROJECT_NAME         : $PROJECT_NAME"
    display_message "BUILD_TYPE           : $BUILD_TYPE"
    display_message "BUILD_DIR            : $BUILD_DIR"
    display_message "--------------------------------------------------------------------"
}

# Download from github.
download_from_github()
{
    local DIRECTORY=$1
    local ACCOUNT=$2
    local REPO=$3
    local BRANCH=$4
    local DIR=$5
    shift 5

    push_directory "$DIRECTORY"

    FORK="$ACCOUNT/$REPO"

    if ! [ -d $DIR ]; then
      # Clone the repository locally.
      display_heading_message "Download: $FORK/$BRANCH"
      git clone --depth 1 --branch $BRANCH --single-branch "https://github.com/$FORK" $DIR
    else
      push_directory "$DIR"
      display_heading_message "Updating: $FORK/$BRANCH"
      git pull
      pop_directory
    fi

    pop_directory
}

github()
{
    display_heading_message "Updating the current project"

    if [[ $PULL_SELF == yes ]]; then
      git pull
    fi

    download_from_github src/lib ufocomp libdelphi master delphi
    download_from_github src apostoldevel apostol-core master core
}

Success()
{
    display_message ""
    echo -e "********************** \e[32;1mSUCCESS\e[0m **********************"
    echo -e "\e[32m-- To build the $PROJECT_NAME run:\e[0m"
    display_message "--------------------------------------------------------------------"
    echo -e "\e[1m$ cd $BUILD_DIR \e[0m"
    echo -e "\e[1m$ make \e[0m"
    display_message "--------------------------------------------------------------------"
    echo -e "\e[32m-- To install the $PROJECT_NAME run:\e[0m"
    display_message "--------------------------------------------------------------------"
    echo -e "\e[1m$ sudo make install\e[0m"
    display_message "--------------------------------------------------------------------"
}

make_configuration()
{
    if ! [[ $BUILD_UPDATE ]]; then
        create_directory $BUILD_DIR
    fi

    echo '#define AUTO_VERSION _T("1.0.e00000-b0")' > version.h

    if [[ $PULL_GITHUB == yes ]]; then
      github
    fi

    display_heading_message "Make: $PROJECT_NAME"

    cmake -DCMAKE_BUILD_TYPE=$BUILD_TYPE . -B $BUILD_DIR

    Success
}

# Parse command line options that are handled by this script.
#------------------------------------------------------------------------------
for OPTION in "$@"; do
    case $OPTION in
        # Standard script options.
        (--help)                DISPLAY_HELP="yes";;

        (--release)             BUILD_TYPE="Release";;
        (--debug)               BUILD_TYPE="Debug";;

        (--update)              BUILD_UPDATE="yes";;
        (--not-pull-self)       PULL_SELF="no";;
        (--not-pull-github)     PULL_GITHUB="no";;

        # Unique script options.
        (--build-dir=*)         BUILD_DIR="${OPTION#*=}";;
    esac
done

if ! [[ $BUILD_DIR ]]; then
  if [[ $BUILD_TYPE == Debug ]]; then
    BUILD_DIR=cmake-build-debug
  else
    BUILD_DIR=cmake-build-release
  fi
fi

# Configure.
#==============================================================================
if [[ $DISPLAY_HELP ]]; then
    display_help
else
    display_configuration
    make_configuration
fi