#!/bin/bash

# root

ROOT_DIR=`realpath "$0"`

ROOT_DIR=`dirname "$ROOT_DIR"`

ROOT_DIR=`dirname "$ROOT_DIR"`

ROOT_DIR=`dirname "$ROOT_DIR"`

# dirs

SCRIPT_DIR=$ROOT_DIR/script

COMMON_SCRIPT_DIR=$SCRIPT_DIR/common

PACKET_SCRIPT_DIR=$SCRIPT_DIR/packet

PACKET_DIR=$ROOT_DIR/packet

ENV_DIR=$ROOT_DIR/env

ENVFLAGS_DIR=$ROOT_DIR/envflags

# vars

INITIAL_LD_LIBRARY_PATH=$LD_LIBRARY_PATH

INITIAL_PATH=$PATH

INITIAL_LDFLAGS=$LDFLAGS

INITIAL_CPPFLAGS=$CPPFLAGS

clean_packet_directory() {

    if [ ! -z "$DRY_RUN" ]; then

        return 0

    fi

    rm -f -r "$PACKET_DIR/$1/$2" || true

    rm -f "$PACKET_DIR/$1/$2.done" || true

}

check_packet_function() {

    if [ ! -f "$PACKET_DIR/$1/$2.done" ]; then

        return 1

    fi

}

prepare_build() {

    if ! cp -r $2/* "$1/"; then

        return 1

    fi

}

call_packet_function() {

    local NAME=$1

    local FUNC=$2

    local PREV_FUNC=$3

    local NEXT_FUNC=$4

    local PREPARE_FUNC=$5

    local FINALIZE_FUNC=$6

    local FUNC_NAME=pk$FUNC

    local CURRENT_PACKET_DIR=$PACKET_DIR/$NAME

    local DONE_FILE=$CURRENT_PACKET_DIR/$FUNC.done

    local FUNC_CURRENT_PACKET_DIR=$CURRENT_PACKET_DIR/$FUNC

    local PREV_FUNC_CURRENT_PACKET_DIR=$CURRENT_PACKET_DIR/$PREV_FUNC

    local NEXT_FUNC_CURRENT_PACKET_DIR=$CURRENT_PACKET_DIR/$NEXT_FUNC

    echo "$FUNC $NAME"

    if [ ! -z "$DRY_RUN" ]; then

        return 0

    fi

    rm -f "$DONE_FILE" || true

    mkdir -p $FUNC_CURRENT_PACKET_DIR

    cd $FUNC_CURRENT_PACKET_DIR

    source "$PACKET_SCRIPT_DIR/$NAME.sh"

    if [ ! -z "$PREPARE_FUNC" ]; then

        if ! "$PREPARE_FUNC" "$FUNC_CURRENT_PACKET_DIR" "$PREV_FUNC_CURRENT_PACKET_DIR" "$NEXT_FUNC_CURRENT_PACKET_DIR"; then

            return 1

        fi

    fi

    if ! "$FUNC_NAME" "$FUNC_CURRENT_PACKET_DIR" "$PREV_FUNC_CURRENT_PACKET_DIR" "$NEXT_FUNC_CURRENT_PACKET_DIR"; then

        return 1

    fi

    if [ ! -z "$FINALIZE_FUNC" ]; then

        if ! "$FINALIZE_FUNC" "$FUNC_CURRENT_PACKET_DIR" "$PREV_FUNC_CURRENT_PACKET_DIR" "$NEXT_FUNC_CURRENT_PACKET_DIR"; then

            return 1

        fi

    fi

    echo 1 > "$DONE_FILE"

}

clean_download() {

    clean_packet_directory $1 download

}

clean_unpack() {

    clean_packet_directory $1 download

}

clean_build() {

    clean_packet_directory $1 build

}

clean_install() {

    clean_packet_directory $1 install

}

clean() {

    clean_download $1

    clean_unpack $1

    clean_build $1

    clean_install $1

}

download() {

    if ! (check_packet_function $1 download || call_packet_function $1 download "" unpack); then

        return 1

    fi

}

unpack() {

    if ! (check_packet_function $1 unpack || (download $1 && call_packet_function $1 unpack download build)); then

        return 1

    fi

}

build() {

    if check_packet_function $1 build; then

        return 0

    fi

    if ! unpack $1; then

        return 1

    fi

    set_environment_deps $1

    if [ ! "$?" -eq "0" ]; then

        return 1

    fi

    if ! call_packet_function $1 build unpack install prepare_build; then

        return 1

    fi

}

install() {

    if ! (install_deps $1 && (check_packet_function $1 install || (build $1 && call_packet_function $1 install build))); then

        return 1

    fi

}

download_with_deps() {

    source $PACKET_SCRIPT_DIR/$1.sh

    local CURRENT_DEPS=$DEPS

    for DEP in $CURRENT_DEPS; do

        if [ ! -z "$DEP"]; then

            if ! download $DEP; then

                return 1

            fi

        fi

    done

    if ! download $1; then

        return 1

    fi

}

unpack_with_deps() {

    source $PACKET_SCRIPT_DIR/$1.sh

    local CURRENT_DEPS=$DEPS

    for DEP in $CURRENT_DEPS; do

        if [ ! -z "$DEP"]; then

            if ! unpack $DEP; then

                return 1

            fi

        fi

    done

    if ! unpack $1; then

        return 1

    fi

}

install_deps() {

    source $PACKET_SCRIPT_DIR/$1.sh

    local CURRENT_DEPS=$DEPS

    for DEP in $CURRENT_DEPS; do

        if [ ! -z "$DEP"]; then

            if ! install $DEP; then

                return 1

            fi

        fi

    done

}

clear_environment() {

    if [ ! -z "$DRY_RUN" ]; then

        return 0

    fi

    rm -r -f "$ENVFLAGS_DIR"

    rm -r -f "$ENV_DIR"

}

add_environment_deps() {

    if ! install_deps $1; then

        return 1

    fi

    export LD_LIBRARY_PATH="$ENV_DIR/lib:$INITIAL_LD_LIBRARY_PATH"

    export PATH="$ENV_DIR/bin:$INITIAL_PATH"

    export LDFLAGS="-L$ENV_DIR/lib $INITIAL_LDFLAGS"

    export CPPFLAGS="-I$ENV_DIR/include $INITIAL_CPPFLAGS -fpermissive" 

    source $PACKET_SCRIPT_DIR/$1.sh

    local CURRENT_DEPS=$DEPS

    for DEP in $CURRENT_DEPS; do

        if [ ! -z "$DEP"]; then

            if ! add_environment $DEP; then

                return 1

            fi

        fi

    done

}

add_environment() {

    local NAME=$1

    local DONE_FILE=$ENVFLAGS_DIR/$NAME.done

    if [ -f "$DONE_FILE" ]; then

        return 0

    fi

    if ! install $NAME; then

        return 1

    fi

    add_environment_deps $NAME

    if [ ! "$?" -eq "0" ]; then

        return 1

    fi

    if [ ! -z "$DRY_RUN" ]; then

        return 0

    fi

    mkdir -p $ENV_DIR

    if ! cp -r "$PACKET_DIR/$NAME/install/*" "$WORK_ENV_DIR/"; then

        return 1

    fi

    mkdir -p "$ENVFLAGS_DIR"

    echo 1 > "$DONE_FILE"

}

set_environment_deps() {

    clear_environment

    add_environment_deps $1

    if [ ! "$?" -eq "0" ]; then

        return 1

    fi

    if [ "$2" = "shell" ]; then

        cd $PACKET_DIR/$1/build

        /bin/bash -i

    fi

}

set_environment() {

    clear_environment

    add_environment $1

    if [ ! "$?" -eq "0" ]; then

        return 1

    fi

    if [ "$2" = "shell" ]; then

        cd $PACKET_DIR/$1/build

        /bin/bash -i

    fi

}

dry_run() {

    DRY_RUN=1

    "$@"

}

"$@"