#!/bin/bash

# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2020-present Team LibreELEC (https://libreelec.tv)

. config/options "${1}"

command -v quilt >/dev/null 2>&1 || die "please install quilt"

if [ -z "${1}" ]; then
  die "usage: ${0} package_name"
fi

if [ -z "${PKG_NAME}" ]; then
  die "$(print_color CLR_ERROR "${1}: no package.mk file found")"
fi

${SCRIPTS}/get "${PKG_NAME}"

mkdir -p ${BUILD}/build

build_msg "CLR_UNPACK" "REFRESH" "${PKG_NAME}"

PKG_UNPACK_DIR="${BUILD}/.unpack/${PKG_NAME}"
rm -rf "${PKG_UNPACK_DIR}"
mkdir -p "${PKG_UNPACK_DIR}"

PKG_BUILD="${PKG_UNPACK_DIR}/refresh-${PKG_NAME}-${PKG_VERSION}"

pkg_call_exists_opt pre_unpack && pkg_call

if pkg_call_exists unpack; then
  pkg_call
else
  if [ -n "${PKG_URL}" ]; then
    ${SCRIPTS}/extract "${PKG_NAME}" "${PKG_UNPACK_DIR}"
  fi
  pkg_call_finish
fi

if [ -z "${PKG_SOURCE_DIR}" -a -d "${PKG_UNPACK_DIR}/${PKG_NAME}-${PKG_VERSION}"* ]; then
  mv "${PKG_UNPACK_DIR}/${PKG_NAME}-${PKG_VERSION}"* "${PKG_UNPACK_DIR}/.intermediate"
fi

if [ ! -d "${PKG_UNPACK_DIR}/.intermediate" ]; then
  if [ -n "${PKG_SOURCE_DIR}" ]; then
    if [ -d "${PKG_UNPACK_DIR}"/${PKG_SOURCE_DIR} ]; then
      mv "${PKG_UNPACK_DIR}"/${PKG_SOURCE_DIR} "${PKG_UNPACK_DIR}/.intermediate"
    else
      # fallback
      mv "${BUILD}"/${PKG_SOURCE_DIR} "${PKG_UNPACK_DIR}/.intermediate"
    fi
  fi
fi

[ ! -d "${PKG_UNPACK_DIR}/.intermediate" ] && mkdir -p "${PKG_UNPACK_DIR}/.intermediate"

if [ -d "${PKG_DIR}/sources" ]; then
  cp -PRf "${PKG_DIR}/sources/"* "${PKG_UNPACK_DIR}/.intermediate"
fi

mv "${PKG_UNPACK_DIR}/.intermediate" "${PKG_BUILD}"

pkg_call_exists_opt post_unpack && pkg_call

pkg_call_exists_opt pre_patch && pkg_call

if [ "${TARGET_ARCH}" = "x86_64" ]; then
  PATCH_ARCH="x86"
elif  [ "${PKG_IS_KERNEL_PKG}" = "yes" ]; then
  PATCH_ARCH="${TARGET_KERNEL_PATCH_ARCH:-${TARGET_ARCH}}"
else
  PATCH_ARCH="${TARGET_PATCH_ARCH:-${TARGET_ARCH}}"
fi

PATCH_DIRS_PKG=""
PATCH_DIRS_PRJ=""
if [ -n "${PKG_PATCH_DIRS}" ]; then
  for patch_dir in ${PKG_PATCH_DIRS}; do
    if [[ ${patch_dir} =~ ^/ ]]; then
      [ -f ${patch_dir} ] && PATCH_DIRS_PKG+=" ${patch_dir}"
      [ -d ${patch_dir} ] && PATCH_DIRS_PKG+=" ${patch_dir}/*.patch"
    else
      [ -d ${PKG_DIR}/patches/${patch_dir} ] && PATCH_DIRS_PKG+=" ${PKG_DIR}/patches/${patch_dir}/*.patch"
      [ -d ${PROJECT_DIR}/${PROJECT}/patches/${PKG_NAME}/${patch_dir} ] && PATCH_DIRS_PRJ+=" ${PROJECT_DIR}/${PROJECT}/patches/${PKG_NAME}/${patch_dir}/*.patch"
      [ -d ${PROJECT_DIR}/${PROJECT}/devices/${DEVICE}/patches/${PKG_NAME}/${patch_dir} ] && PATCH_DIRS_PRJ+=" ${PROJECT_DIR}/${PROJECT}/devices/${DEVICE}/patches/${PKG_NAME}/${patch_dir}/*.patch"
    fi
  done
fi

rm -rf "${PKG_BUILD}/patches"
mkdir -p "${PKG_BUILD}/patches"

for i in ${PKG_DIR}/patches/*.patch \
         ${PKG_DIR}/patches/${PATCH_ARCH}/*.patch \
         ${PATCH_DIRS_PKG} \
         ${PKG_DIR}/patches/${PKG_VERSION}/*.patch \
         ${PKG_DIR}/patches/${PKG_VERSION}/${PATCH_ARCH}/*.patch \
         ${PROJECT_DIR}/${PROJECT}/patches/${PKG_NAME}/*.patch \
         ${PROJECT_DIR}/${PROJECT}/patches/${PKG_NAME}/${PATCH_ARCH}/*.patch \
         ${PATCH_DIRS_PRJ} \
         ${PROJECT_DIR}/${PROJECT}/patches/${PKG_NAME}/${PKG_VERSION}/*.patch \
         ${PROJECT_DIR}/${PROJECT}/devices/${DEVICE}/patches/${PKG_NAME}/*.patch; do
  if [ -f "${i}" ]; then
    PATCH="${i#${ROOT}/}"
    mkdir -p "$(dirname ${PKG_BUILD}/patches/${PATCH})"
    ln -s "${i}" "${PKG_BUILD}/patches/${PATCH}"
    echo "${PATCH}" >> "${PKG_BUILD}/patches/series"
  fi
done

quilt_cmd() {
  quilt --quiltrc=- $*
}

cd "${PKG_BUILD}"
while quilt_cmd next >/dev/null 2>&1; do
  if ! quilt_cmd push; then
    PATCH="$(quilt_cmd next)"
    if patch -R -f --dry-run -p1 -i "patches/${PATCH}" >/dev/null 2>&1; then
      build_msg "CLR_UNPACK" "REFRESH" "${PKG_NAME} Removing already applied patch ${PATCH}\n"
      rm -f $(readlink "patches/${PATCH}")
      quilt_cmd delete -n -r
      continue
    else
      exit 1
    fi
  fi

  QUILT_DIFF_OPTS="-p" quilt_cmd refresh -p ab --no-index --no-timestamps
done

# cleanup
rm -rf "${PKG_UNPACK_DIR}"