#!/bin/bash

set -e

MIRROR="https://packages.0xinfinity.dev"

if [ -z "${FS_ROOT}" ]
then
	FS_ROOT="/"
fi

if [[ "${FS_ROOT}" == "/" ]]; then

    if [[ "$(whoami)" != "root" ]]; then
	echo -e "You must run '${0}' as root."
	exit 1
    fi
fi

if [ -z "${TMP_DIR}" ]
then
	TMP_DIR="/tmp"
fi
mkdir -p "${TMP_DIR}/downloads"

if [ -z "${IBPS_DB}" ]
then
	IBPS_DB="${FS_ROOT}/var/ibps/"	
fi
mkdir -p "${IBPS_DB}"

function download_from_mirror {
    file="$1"
    version="$2"
    build_no="$3"
    curl --output-dir="$TMP_DIR/downloads" "${MIRROR}/${file}/${file}-${version}-${build_no}.ibps" -O
    echo "Downloaded ${file}:${version}:${build_no}"
}

function extract {
	file="$1"
	currdir="$(pwd)"
	
	mkdir -p "${TMP_DIR}/${file}"
	cp "${TMP_DIR}/downloads/${file}.ibps" "${TMP_DIR}/${file}"
	cd "${TMP_DIR}/${file}"

	tar -xf "${file}.ibps"

	rm "${file}.ibps"

	cd "${currdir}"
}

## Temporarily broken for testing purposes
function get_latest_version {
    local file="$1"
    
    echo -e "$resp"
    echo -e "VERSION SPEC:"
    echo -e "$version"
    echo -e "BUILD SPEC:"
    echo -e "$build_no"
}

if [ $# -eq 0 ]
then
	echo -e "You must supply a package name!"
	echo -e "Example:"
	echo -e "	$0 vim"
fi

PKG_NAME=$1

resp=$(curl "${MIRROR}/${PKG_NAME}/" -o -)

if [[ "$(echo "$resp" | grep "^<head><title>404 Not Found</title></head>")" == "<head><title>404 Not Found</title></head>" ]]; then
    echo -e "Package '${PKG_NAME}' does not exist on mirror!"
    exit 1
fi

VERSION=$(echo "$resp" | grep "^<a href=\"${PKG_NAME}" | cut -d\" -f2 | cut -d- -f2)
BUILD_NO=$(echo "$resp" | grep "^<a href=\"${PKG_NAME}" | cut -d\" -f2 | cut -d- -f3 | cut -d. -f1)

echo "version: ${VERSION}, build no: ${BUILD_NO}"

download_from_mirror "$PKG_NAME" "$VERSION" "$BUILD_NO"

DWNLD_PKG_NAME="${PKG_NAME}-${VERSION}-${BUILD_NO}"

extract "${DWNLD_PKG_NAME}"

source "${TMP_DIR}/${DWNLD_PKG_NAME}/${DWNLD_PKG_NAME}/.desc"

mkdir -p "${IBPS_DB}/${PKG_NAME}/"

echo "name=${name}" > "${IBPS_DB}/${PKG_NAME}/desc"
echo "version=${version}" >> "${IBPS_DB}/${PKG_NAME}/desc"
echo "build_no=${build_no}" >> "${IBPS_DB}/${PKG_NAME}/desc"
echo "depends=${depends}" >> "${IBPS_DB}/${PKG_NAME}/desc"

for i in $(ls "${TMP_DIR}/${DWNLD_PKG_NAME}/${DWNLD_PKG_NAME}/");
do
    cp -r "${TMP_DIR}/${DWNLD_PKG_NAME}/${DWNLD_PKG_NAME}/${i}" "${FS_ROOT}/"
    echo "Copying ${i} to ${FS_ROOT}"
done

if [ "$(type -t post_install)" = "function" ]; then
    post_install
fi

echo "Installed ${PKG_NAME} with version ${VERSION}."