#!/bin/sh
# RPCD backend for CyberFeed LuCI App

. /lib/functions.sh

CYBERFEED_BIN="/usr/bin/cyberfeed"
RSSBRIDGE_BIN="/usr/bin/rss-bridge-setup"
OUTPUT_DIR="/tmp/cyberfeed/output"
CONFIG_FILE="/etc/cyberfeed/feeds.conf"

json_init() {
	JSON_OUTPUT=""
}

json_add_string() {
	local key="$1" val="$2"
	val=$(echo "$val" | sed 's/"/\\"/g; s/\\/\\\\/g')
	[ -n "$JSON_OUTPUT" ] && JSON_OUTPUT="$JSON_OUTPUT,"
	JSON_OUTPUT="$JSON_OUTPUT\"$key\":\"$val\""
}

json_add_int() {
	local key="$1" val="$2"
	[ -n "$JSON_OUTPUT" ] && JSON_OUTPUT="$JSON_OUTPUT,"
	JSON_OUTPUT="$JSON_OUTPUT\"$key\":$val"
}

json_add_bool() {
	local key="$1" val="$2"
	[ -n "$JSON_OUTPUT" ] && JSON_OUTPUT="$JSON_OUTPUT,"
	if [ "$val" = "1" ] || [ "$val" = "true" ]; then
		JSON_OUTPUT="$JSON_OUTPUT\"$key\":true"
	else
		JSON_OUTPUT="$JSON_OUTPUT\"$key\":false"
	fi
}

json_dump() {
	echo "{$JSON_OUTPUT}"
}

# Get service status
get_status() {
	local enabled=$(uci -q get cyberfeed.main.enabled || echo 0)
	local feed_count=0
	local item_count=0
	local last_sync=0
	local rssbridge_enabled=$(uci -q get cyberfeed.rssbridge.enabled || echo 0)
	local rssbridge_running="false"

	if [ -f "${OUTPUT_DIR}/feeds.json" ]; then
		item_count=$(grep -o '"title"' "${OUTPUT_DIR}/feeds.json" 2>/dev/null | wc -l)
		item_count=${item_count:-0}
		last_sync=$(stat -c %Y "${OUTPUT_DIR}/feeds.json" 2>/dev/null || echo 0)
	fi

	if [ -f "$CONFIG_FILE" ]; then
		feed_count=$(grep -v "^#" "$CONFIG_FILE" 2>/dev/null | grep -c "|" || echo 0)
	fi

	if [ "$rssbridge_enabled" = "1" ]; then
		if pgrep -f "rss-bridge\|php.*3000" >/dev/null 2>&1; then
			rssbridge_running="true"
		fi
	fi

	cat << EOF
{
	"enabled": $enabled,
	"feed_count": $feed_count,
	"item_count": $item_count,
	"last_sync": $last_sync,
	"rssbridge_enabled": $rssbridge_enabled,
	"rssbridge_running": $rssbridge_running
}
EOF
}

# Get feeds list
get_feeds() {
	local feeds="[]"
	if [ -x "$CYBERFEED_BIN" ]; then
		feeds=$($CYBERFEED_BIN list)
	fi
	echo "{\"feeds\":$feeds}"
}

# Get feed items
get_items() {
	local items="[]"
	if [ -f "${OUTPUT_DIR}/feeds.json" ]; then
		items=$(cat "${OUTPUT_DIR}/feeds.json")
	fi
	echo "{\"items\":$items}"
}

# Add a feed
add_feed() {
	local name="$1"
	local url="$2"
	local type="${3:-rss}"
	local category="${4:-custom}"

	if [ -z "$name" ] || [ -z "$url" ]; then
		echo '{"success":false,"error":"Name and URL are required"}'
		return
	fi

	# Validate name (alphanumeric and underscore only)
	if ! echo "$name" | grep -qE '^[a-zA-Z0-9_-]+$'; then
		echo '{"success":false,"error":"Invalid name format"}'
		return
	fi

	# Check for duplicates
	if grep -q "^${name}|" "$CONFIG_FILE" 2>/dev/null; then
		echo '{"success":false,"error":"Feed already exists"}'
		return
	fi

	echo "${name}|${url}|${type}|${category}" >> "$CONFIG_FILE"
	echo '{"success":true}'
}

# Delete a feed
delete_feed() {
	local name="$1"

	if [ -z "$name" ]; then
		echo '{"success":false,"error":"Name is required"}'
		return
	fi

	if grep -q "^${name}|" "$CONFIG_FILE" 2>/dev/null; then
		sed -i "/^${name}|/d" "$CONFIG_FILE"
		rm -f "/tmp/cyberfeed/cache/${name}.xml"
		echo '{"success":true}'
	else
		echo '{"success":false,"error":"Feed not found"}'
	fi
}

# Sync feeds
sync_feeds() {
	if [ -x "$CYBERFEED_BIN" ]; then
		$CYBERFEED_BIN sync >/dev/null 2>&1 &
		echo '{"success":true,"message":"Sync started"}'
	else
		echo '{"success":false,"error":"CyberFeed not installed"}'
	fi
}

# Get config
get_config() {
	local enabled=$(uci -q get cyberfeed.main.enabled || echo 0)
	local refresh=$(uci -q get cyberfeed.main.refresh_interval || echo 5)
	local max_items=$(uci -q get cyberfeed.main.max_items || echo 20)
	local cache_ttl=$(uci -q get cyberfeed.main.cache_ttl || echo 300)
	local rssbridge_enabled=$(uci -q get cyberfeed.rssbridge.enabled || echo 0)
	local rssbridge_port=$(uci -q get cyberfeed.rssbridge.port || echo 3000)

	cat << EOF
{
	"enabled": $enabled,
	"refresh_interval": $refresh,
	"max_items": $max_items,
	"cache_ttl": $cache_ttl,
	"rssbridge_enabled": $rssbridge_enabled,
	"rssbridge_port": $rssbridge_port
}
EOF
}

# Save config
save_config() {
	local enabled="$1"
	local refresh="$2"
	local max_items="$3"
	local cache_ttl="$4"
	local rssbridge_enabled="$5"
	local rssbridge_port="$6"

	[ -n "$enabled" ] && uci set cyberfeed.main.enabled="$enabled"
	[ -n "$refresh" ] && uci set cyberfeed.main.refresh_interval="$refresh"
	[ -n "$max_items" ] && uci set cyberfeed.main.max_items="$max_items"
	[ -n "$cache_ttl" ] && uci set cyberfeed.main.cache_ttl="$cache_ttl"
	[ -n "$rssbridge_enabled" ] && uci set cyberfeed.rssbridge.enabled="$rssbridge_enabled"
	[ -n "$rssbridge_port" ] && uci set cyberfeed.rssbridge.port="$rssbridge_port"

	uci commit cyberfeed

	# Restart service if needed
	/etc/init.d/cyberfeed reload 2>/dev/null

	echo '{"success":true}'
}

# RSS-Bridge status
rssbridge_status() {
	if [ -x "$RSSBRIDGE_BIN" ]; then
		$RSSBRIDGE_BIN status
	else
		echo '{"installed":false,"enabled":false,"running":false}'
	fi
}

# RSS-Bridge install
rssbridge_install() {
	if [ -x "$RSSBRIDGE_BIN" ]; then
		$RSSBRIDGE_BIN install >/dev/null 2>&1 &
		echo '{"success":true,"message":"Installation started"}'
	else
		echo '{"success":false,"error":"Setup script not found"}'
	fi
}

# RSS-Bridge start/stop
rssbridge_control() {
	local action="$1"

	if [ -x "$RSSBRIDGE_BIN" ]; then
		$RSSBRIDGE_BIN "$action" >/dev/null 2>&1
		echo '{"success":true}'
	else
		echo '{"success":false,"error":"Setup script not found"}'
	fi
}

# RPCD interface
case "$1" in
	list)
		cat << 'EOF'
{
	"get_status": {},
	"get_feeds": {},
	"get_items": {},
	"add_feed": {"name":"str","url":"str","type":"str","category":"str"},
	"delete_feed": {"name":"str"},
	"sync_feeds": {},
	"get_config": {},
	"save_config": {"enabled":"int","refresh_interval":"int","max_items":"int","cache_ttl":"int","rssbridge_enabled":"int","rssbridge_port":"int"},
	"rssbridge_status": {},
	"rssbridge_install": {},
	"rssbridge_control": {"action":"str"}
}
EOF
		;;
	call)
		case "$2" in
			get_status)
				get_status
				;;
			get_feeds)
				get_feeds
				;;
			get_items)
				get_items
				;;
			add_feed)
				read -r input
				name=$(echo "$input" | jsonfilter -e '@.name' 2>/dev/null)
				url=$(echo "$input" | jsonfilter -e '@.url' 2>/dev/null)
				type=$(echo "$input" | jsonfilter -e '@.type' 2>/dev/null)
				category=$(echo "$input" | jsonfilter -e '@.category' 2>/dev/null)
				add_feed "$name" "$url" "$type" "$category"
				;;
			delete_feed)
				read -r input
				name=$(echo "$input" | jsonfilter -e '@.name' 2>/dev/null)
				delete_feed "$name"
				;;
			sync_feeds)
				sync_feeds
				;;
			get_config)
				get_config
				;;
			save_config)
				read -r input
				enabled=$(echo "$input" | jsonfilter -e '@.enabled' 2>/dev/null)
				refresh=$(echo "$input" | jsonfilter -e '@.refresh_interval' 2>/dev/null)
				max_items=$(echo "$input" | jsonfilter -e '@.max_items' 2>/dev/null)
				cache_ttl=$(echo "$input" | jsonfilter -e '@.cache_ttl' 2>/dev/null)
				rssbridge_enabled=$(echo "$input" | jsonfilter -e '@.rssbridge_enabled' 2>/dev/null)
				rssbridge_port=$(echo "$input" | jsonfilter -e '@.rssbridge_port' 2>/dev/null)
				save_config "$enabled" "$refresh" "$max_items" "$cache_ttl" "$rssbridge_enabled" "$rssbridge_port"
				;;
			rssbridge_status)
				rssbridge_status
				;;
			rssbridge_install)
				rssbridge_install
				;;
			rssbridge_control)
				read -r input
				action=$(echo "$input" | jsonfilter -e '@.action' 2>/dev/null)
				rssbridge_control "$action"
				;;
			*)
				echo '{"error":"Unknown method"}'
				;;
		esac
		;;
esac