#!/bin/bash

 # Copyright (C) 2022 Giovanni Cascione <ing.cascione@gmail.com>
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.

set -e

function get_firmware_entry(){
	echo "
firmware$1_desc = \"$2\"
firmware$1_path = \"$3/$2\"
firmware$1_opt = \"true\"
"
}

function process_group(){
	local dirname="$1"
	shift
	local target="$1"
	shift
	local arr=("$@")
	for item in "${arr[@]}"; do
		[ $target = "bundle" ] && cp $item "${TMP_PATH}/${dirname}/"
		fragment=$(get_firmware_entry $count $(echo "$item" | sed "s|^.*/||g") "$dirname")
		CORE_INFO_DATS="${CORE_INFO_DATS}${fragment}"
		count=$(expr $count + 1)
	done
}

# Externally passed variables shall be:
# $1 [REQ] BUILD_PATH
# $2 [REQ] SCUMMVM_PATH
# $3 [REQ] target build ("bundle" to build scummvm.zip, any other string to build core info file)
# $4 [OPT] target name (prefix for core info file)
# $5 [OPT] displayed core name (shown in frontend)
# $6 [OPT] allowed extensions - backup if ScummVM.dat is not available
# $7 [OPT] target scummvm folder name in frontend system folder
# $8 [OPT] target extra folder name in scummvm system folder
# $9 [OPT] target theme folder name in scummvm system folder

# Exit if in parameters are not provided
if [ -z $1 ] || [ -z $2 ] || [ -z $3 ] ; then
	exit 1
fi

[ -z $4 ] && INFO_FILE_PRE=scummvm || INFO_FILE_PRE=$4
[ -z $5 ] && NICE_NAME=ScummVM || NICE_NAME=$5
[ -z $6 ] && ALLOWED_EXT=scummvm || ALLOWED_EXT=$6
[ -z $7 ] && BUNDLE_DIR=scummvm || BUNDLE_DIR="$7"
[ -z $8 ] && BUNDLE_DATAFILES_DIR="${BUNDLE_DIR}/extra" || BUNDLE_DATAFILES_DIR="${BUNDLE_DIR}/$8"
[ -z $9 ] && BUNDLE_THEME_DIR="${BUNDLE_DIR}/theme" || BUNDLE_THEME_DIR="${BUNDLE_DIR}/$9"

# Set variables
BUILD_PATH="$1"
SCUMMVM_PATH="$2"
TMP_PATH="${BUILD_PATH}/tmp_data"
TARGET_PATH="${BUILD_PATH}"
BUNDLE_ZIP_FILE="${BUNDLE_DIR}.zip"
BUNDLE_LOCAL_DATAFILES_DIR="${BUILD_PATH}/dist"

# Retrieve data file info from ScummVM source
THEMES_LIST=$(cat "${SCUMMVM_PATH}/dists/scummvm.rc" 2>/dev/null | grep FILE.*gui/themes.*\* | sed "s|.*\"\(.*\)\"|${SCUMMVM_PATH}/\1|g")
DATAFILES_LIST_DATA=$(cat "${SCUMMVM_PATH}/dists/engine-data/engine_data.mk" 2>/dev/null| grep DIST_FILES_LIST | sed "s|DIST_FILES_LIST += \(.*\)|${SCUMMVM_PATH}/\1|g")
DATAFILES_LIST_DATA_BIG=$(cat "${SCUMMVM_PATH}/dists/engine-data/engine_data_big.mk" 2>/dev/null| grep DIST_FILES_LIST | sed "s|DIST_FILES_LIST += \(.*\)|${SCUMMVM_PATH}/\1|g")
DATAFILES_LIST_DATA_CORE=$(cat "${SCUMMVM_PATH}/dists/engine-data/engine_data_core.mk" 2>/dev/null| grep DIST_FILES_LIST | sed "s|DIST_FILES_LIST += \(.*\)|${SCUMMVM_PATH}/\1|g")
SOUNDFONTS_LIST=$(cat "${SCUMMVM_PATH}/dists/scummvm.rc" 2>/dev/null| grep FILE.*dists/soundfonts | sed "s|.*\"\(.*\)\"|${SCUMMVM_PATH}/\1|g")

# Put retrieved data into arrays
set +e
read -a THEME_ARRAY -d '' -r <<< "${THEMES_LIST}"
read -a DATAFILES_ARRAY -d '' -r <<< "$DATAFILES_LIST_DATA $DATAFILES_LIST_DATA_BIG $DATAFILES_LIST_DATA_CORE"
read -a SOUNDFONTS_ARRAY -d '' -r <<< "$SOUNDFONTS_LIST"
set -e

# Add specific data files
DATAFILES_ARRAY[${#DATAFILES_ARRAY[@]}]="${SCUMMVM_PATH}"/backends/vkeybd/packs/vkeybd_default.zip

# Make sure target folders exist
[ $3 = "bundle" ] && mkdir -p "${TMP_PATH}/${BUNDLE_THEME_DIR}/"
[ $3 = "bundle" ] && mkdir -p "${TMP_PATH}/${BUNDLE_DATAFILES_DIR}/"

count=0
# Process themes
	process_group "$BUNDLE_THEME_DIR" $3 ${THEME_ARRAY[@]}

# Process datafiles
	process_group "$BUNDLE_DATAFILES_DIR" $3 ${DATAFILES_ARRAY[@]}
	process_group "$BUNDLE_DATAFILES_DIR" $3 ${SOUNDFONTS_ARRAY[@]}

# Process additional local bundle files
if [ -d "$BUNDLE_LOCAL_DATAFILES_DIR" -a ! -z "$(ls -A ${BUNDLE_LOCAL_DATAFILES_DIR} 2>/dev/null)" ] ; then
	for item in $BUNDLE_LOCAL_DATAFILES_DIR/*; do
		[ ! $(echo "$item" | sed "s|^.*/||g") = "README.md" ] && LOCAL_EXTRA_ARRAY+=("$item")
	done
	process_group "$BUNDLE_DATAFILES_DIR" $3 ${LOCAL_EXTRA_ARRAY[@]}
fi

if [ ! $3 = "bundle" ]; then
	# Create core.info file
	set +e
	read -d '' CORE_INFO_CONTENT <<EOF
# Software Information
display_name = "$NICE_NAME"
authors = "ScummVM Team"
supported_extensions = "$ALLOWED_EXT"
corename = "$NICE_NAME"
categories = "Game"
license = "GPLv3"
permissions = ""
display_version = $(cat $SCUMMVM_PATH/base/internal_version.h 2>/dev/null | grep SCUMMVM_VERSION | sed "s|^.*SCUMMVM_VERSION *||g")

# Hardware Information
manufacturer = "Various"
systemname = "Game engine"
systemid = "scummvm"

# Libretro Features
database = "ScummVM"
supports_no_game = "true"
savestate = "false"
savestate_features = "null"
cheats = "false"
input_descriptors = "true"
memory_descriptors = "false"
libretro_saves = "false"
core_options = "true"
core_options_version = "1.3"
load_subsystem = "false"
hw_render = "false"
needs_fullpath = "true"
disk_control = "false"
is_experimental = "false"

# Firmware / BIOS
firmware_count = $count
EOF
	set -e

	CORE_INFO_CONTENT="${CORE_INFO_CONTENT}${CORE_INFO_DATS}
description = \"The ScummVM official port to libretro core.\""
	echo "$CORE_INFO_CONTENT" > "${TARGET_PATH}/${INFO_FILE_PRE}_libretro.info"
	echo "${INFO_FILE_PRE}_libretro.info created successfully"
else

	# Create archive
	rm -f "${TARGET_PATH}/$BUNDLE_ZIP_FILE"
	cd "${TMP_PATH}"
	zip -rq "${TARGET_PATH}/$BUNDLE_ZIP_FILE" "${BUNDLE_DIR}" > /dev/null 2>&1
	cd - > /dev/null

	# Remove temporary directories
	rm -rf "$TMP_PATH"
	echo "$BUNDLE_ZIP_FILE created successfully"
fi