#!/bin/sh
# RezApp Forge - Docker to LXC Converter
# Copyright (C) 2026 SecuBox

. /lib/functions.sh

CONFIG="rezapp"
CACHE_DIR=""
OUTPUT_DIR=""
APPS_DIR=""
LXC_DIR=""
DEFAULT_MEMORY=""
DEFAULT_NETWORK=""
TEMPLATES_DIR="/usr/share/rezapp/templates"

# Logging
log_info() { echo "[INFO] $*"; }
log_warn() { echo "[WARN] $*" >&2; }
log_error() { echo "[ERROR] $*" >&2; }

# Load configuration
load_config() {
	config_load "$CONFIG"
	config_get CACHE_DIR main cache_dir "/srv/rezapp/cache"
	config_get OUTPUT_DIR main output_dir "/srv/rezapp/generated"
	config_get APPS_DIR main apps_dir "/srv/rezapp/apps"
	config_get LXC_DIR main lxc_dir "/srv/lxc"
	config_get DEFAULT_MEMORY main default_memory "512M"
	config_get DEFAULT_NETWORK main default_network "host"
}

# Ensure directories exist
ensure_dirs() {
	mkdir -p "$CACHE_DIR" "$OUTPUT_DIR" "$APPS_DIR"
}

# ==========================================
# Catalog Commands
# ==========================================

cmd_catalog_list() {
	echo "Enabled Catalogs:"
	echo "================="

	_print_catalog() {
		local section="$1"
		local name enabled type namespace

		config_get name "$section" name "$section"
		config_get enabled "$section" enabled "0"
		config_get type "$section" type "dockerhub"
		config_get namespace "$section" namespace ""

		[ "$enabled" = "1" ] || return

		if [ -n "$namespace" ]; then
			printf "  %-15s %-12s %s\n" "$section" "$type" "$namespace/*"
		else
			printf "  %-15s %-12s (all)\n" "$section" "$type"
		fi
	}

	config_load "$CONFIG"
	config_foreach _print_catalog catalog
}

cmd_catalog_add() {
	local name="$1"
	local namespace="$2"

	[ -z "$name" ] && { log_error "Catalog name required"; return 1; }

	uci set rezapp.$name=catalog
	uci set rezapp.$name.name="$name"
	uci set rezapp.$name.type="dockerhub"
	[ -n "$namespace" ] && uci set rezapp.$name.namespace="$namespace"
	uci set rezapp.$name.enabled="1"
	uci commit rezapp

	log_info "Catalog added: $name"
}

cmd_catalog_remove() {
	local name="$1"

	[ -z "$name" ] && { log_error "Catalog name required"; return 1; }

	uci delete rezapp.$name 2>/dev/null
	uci commit rezapp

	log_info "Catalog removed: $name"
}

# ==========================================
# Search Commands
# ==========================================

cmd_search() {
	local query="$1"
	local catalog="$2"

	[ -z "$query" ] && { log_error "Search query required"; return 1; }

	log_info "Searching Docker Hub for: $query"

	local url="https://hub.docker.com/v2/search/repositories/?query=${query}&page_size=25"
	local result=$(curl -s "$url")

	if [ -z "$result" ]; then
		log_error "Search failed"
		return 1
	fi

	echo ""
	echo "Search Results:"
	echo "==============="

	echo "$result" | jsonfilter -e '@.results[*]' | while read -r item; do
		local name=$(echo "$item" | jsonfilter -e '@.repo_name')
		local desc=$(echo "$item" | jsonfilter -e '@.short_description' | head -c 60)
		local stars=$(echo "$item" | jsonfilter -e '@.star_count')
		local official=$(echo "$item" | jsonfilter -e '@.is_official')

		local badge=""
		[ "$official" = "true" ] && badge="[official]"

		printf "  %-35s %5s* %s %s\n" "$name" "$stars" "$badge" "$desc"
	done
}

cmd_info() {
	local image="$1"

	[ -z "$image" ] && { log_error "Image name required"; return 1; }

	# Parse image name
	local namespace="${image%%/*}"
	local repo="${image#*/}"

	if [ "$namespace" = "$image" ]; then
		namespace="library"
		repo="$image"
	fi

	log_info "Fetching info for: $image"

	# Get tags
	local tags_url="https://hub.docker.com/v2/repositories/${namespace}/${repo}/tags?page_size=10"
	local tags=$(curl -s "$tags_url")

	echo ""
	echo "Image: $image"
	echo "========================================"
	echo ""
	echo "Available Tags:"
	echo "$tags" | jsonfilter -e '@.results[*].name' | head -10 | while read tag; do
		echo "  - $tag"
	done

	# Try to get config for latest
	echo ""
	echo "To convert: rezappctl convert $image --name <app-name>"
}

# ==========================================
# Convert Command
# ==========================================

cmd_convert() {
	local image=""
	local name=""
	local tag="latest"
	local memory=""
	local network=""
	local ports=""
	local mounts=""

	# Parse arguments
	while [ $# -gt 0 ]; do
		case "$1" in
			--name) name="$2"; shift 2 ;;
			--tag) tag="$2"; shift 2 ;;
			--memory) memory="$2"; shift 2 ;;
			--network) network="$2"; shift 2 ;;
			--port) ports="$ports $2"; shift 2 ;;
			--mount) mounts="$mounts $2"; shift 2 ;;
			-*) log_error "Unknown option: $1"; return 1 ;;
			*) image="$1"; shift ;;
		esac
	done

	[ -z "$image" ] && { log_error "Image name required"; return 1; }

	# Default name from image
	if [ -z "$name" ]; then
		name="${image##*/}"
		name="${name%%:*}"
	fi

	[ -z "$memory" ] && memory="$DEFAULT_MEMORY"
	[ -z "$network" ] && network="$DEFAULT_NETWORK"

	local full_image="${image}:${tag}"
	local app_dir="$APPS_DIR/$name"
	local lxc_path="$LXC_DIR/$name"
	local tarball="$CACHE_DIR/${name}.tar"

	log_info "Converting $full_image -> $name"

	# Step 1: Ensure Docker is running
	if ! docker info >/dev/null 2>&1; then
		log_info "Starting Docker daemon..."
		/etc/init.d/dockerd start 2>/dev/null
		sleep 5
		if ! docker info >/dev/null 2>&1; then
			log_error "Docker is not available"
			return 1
		fi
	fi

	# Step 2: Pull image
	log_info "Pulling Docker image..."
	docker pull "$full_image" || { log_error "Failed to pull image"; return 1; }

	# Step 3: Inspect image
	log_info "Inspecting image metadata..."
	mkdir -p "$app_dir"
	docker inspect "$full_image" > "$app_dir/docker-inspect.json"

	# Extract metadata
	local entrypoint=$(jsonfilter -i "$app_dir/docker-inspect.json" -e '@[0].Config.Entrypoint[*]' 2>/dev/null | tr '\n' ' ')
	local cmd=$(jsonfilter -i "$app_dir/docker-inspect.json" -e '@[0].Config.Cmd[*]' 2>/dev/null | tr '\n' ' ')
	local workdir=$(jsonfilter -i "$app_dir/docker-inspect.json" -e '@[0].Config.WorkingDir' 2>/dev/null)
	local user=$(jsonfilter -i "$app_dir/docker-inspect.json" -e '@[0].Config.User' 2>/dev/null)
	local exposed=$(jsonfilter -i "$app_dir/docker-inspect.json" -e '@[0].Config.ExposedPorts' 2>/dev/null)

	# Step 4: Export filesystem
	log_info "Exporting container filesystem..."
	docker create --name rezapp-export-$$ "$full_image" >/dev/null 2>&1
	docker export rezapp-export-$$ > "$tarball"
	docker rm rezapp-export-$$ >/dev/null 2>&1

	# Step 5: Create LXC rootfs
	log_info "Creating LXC container..."
	rm -rf "$lxc_path"
	mkdir -p "$lxc_path/rootfs"
	tar xf "$tarball" -C "$lxc_path/rootfs"

	# Step 6: Generate start script
	log_info "Generating start script..."
	local start_script="$lxc_path/rootfs/start-lxc.sh"

	cat > "$start_script" << STARTEOF
#!/bin/sh
# Auto-generated by RezApp Forge

cd ${workdir:-/}

# Run entrypoint/cmd
exec ${entrypoint:-${cmd:-/bin/sh}}
STARTEOF
	chmod +x "$start_script"

	# Step 7: Generate LXC config
	log_info "Generating LXC config..."

	# Parse user for UID/GID
	local uid="0"
	local gid="0"
	if [ -n "$user" ] && [ "$user" != "root" ]; then
		uid="${user%%:*}"
		gid="${user#*:}"
		[ "$gid" = "$user" ] && gid="$uid"
	fi

	# Convert memory to bytes
	local mem_bytes
	case "$memory" in
		*G) mem_bytes=$(( ${memory%G} * 1073741824 )) ;;
		*M) mem_bytes=$(( ${memory%M} * 1048576 )) ;;
		*) mem_bytes="$memory" ;;
	esac

	cat > "$lxc_path/config" << LXCEOF
# LXC config for $name (auto-generated by RezApp Forge)
lxc.uts.name = $name
lxc.rootfs.path = dir:$lxc_path/rootfs
lxc.net.0.type = none
lxc.mount.auto = proc:mixed sys:ro
lxc.mount.entry = /srv/$name config none bind,create=dir 0 0
lxc.cap.drop = sys_admin sys_module mac_admin mac_override
lxc.cgroup2.memory.max = $mem_bytes
lxc.init.uid = $uid
lxc.init.gid = $gid
lxc.init.cmd = /start-lxc.sh
lxc.console.size = 1024
lxc.pty.max = 1024
lxc.cgroup2.devices.allow = c 1:* rwm
lxc.cgroup2.devices.allow = c 5:* rwm
lxc.cgroup2.devices.allow = c 136:* rwm
lxc.seccomp.profile =
lxc.start.auto = 0
LXCEOF

	# Step 8: Create data directory
	mkdir -p "/srv/$name"
	[ "$uid" != "0" ] && chown "$uid:$gid" "/srv/$name"

	# Step 9: Save metadata
	cat > "$app_dir/metadata.json" << METAEOF
{
  "name": "$name",
  "source_image": "$full_image",
  "converted_at": "$(date -Iseconds)",
  "entrypoint": "$entrypoint",
  "cmd": "$cmd",
  "workdir": "$workdir",
  "user": "$user",
  "uid": "$uid",
  "gid": "$gid",
  "memory": "$memory",
  "network": "$network",
  "lxc_path": "$lxc_path",
  "data_path": "/srv/$name"
}
METAEOF

	log_info "Conversion complete!"
	echo ""
	echo "Container: $name"
	echo "  LXC Path: $lxc_path"
	echo "  Data Path: /srv/$name"
	echo ""
	echo "To test: lxc-start -n $name -F"
	echo "To package: rezappctl package $name"
}

# ==========================================
# Package Command
# ==========================================

cmd_package() {
	local name="$1"
	local install_after=""

	[ "$name" = "--install" ] && { install_after="1"; name="$2"; }
	[ -z "$name" ] && { log_error "App name required"; return 1; }

	local app_dir="$APPS_DIR/$name"
	local meta_file="$app_dir/metadata.json"
	local pkg_dir="$OUTPUT_DIR/secubox-app-$name"

	[ ! -f "$meta_file" ] && { log_error "App not found: $name (run convert first)"; return 1; }

	# Load metadata
	local source_image=$(jsonfilter -i "$meta_file" -e '@.source_image')
	local memory=$(jsonfilter -i "$meta_file" -e '@.memory')
	local uid=$(jsonfilter -i "$meta_file" -e '@.uid')
	local gid=$(jsonfilter -i "$meta_file" -e '@.gid')

	log_info "Generating package for: $name"

	# Create package structure
	rm -rf "$pkg_dir"
	mkdir -p "$pkg_dir/files/etc/config"
	mkdir -p "$pkg_dir/files/etc/init.d"
	mkdir -p "$pkg_dir/files/usr/sbin"

	# Generate Makefile
	cat > "$pkg_dir/Makefile" << MAKEEOF
include \$(TOPDIR)/rules.mk

PKG_NAME:=secubox-app-$name
PKG_VERSION:=1.0.0
PKG_RELEASE:=1

include \$(INCLUDE_DIR)/package.mk

define Package/secubox-app-$name
  SECTION:=secubox
  CATEGORY:=SecuBox
  SUBMENU:=Apps
  TITLE:=$name (via RezApp Forge)
  DEPENDS:=+lxc +lxc-common
  PKGARCH:=all
endef

define Package/secubox-app-$name/description
  $name - converted from Docker image $source_image
  Generated by RezApp Forge.
endef

define Package/secubox-app-$name/conffiles
/etc/config/$name
endef

define Build/Compile
endef

define Package/secubox-app-$name/install
	\$(INSTALL_DIR) \$(1)/etc/config
	\$(INSTALL_CONF) ./files/etc/config/$name \$(1)/etc/config/

	\$(INSTALL_DIR) \$(1)/etc/init.d
	\$(INSTALL_BIN) ./files/etc/init.d/$name \$(1)/etc/init.d/

	\$(INSTALL_DIR) \$(1)/usr/sbin
	\$(INSTALL_BIN) ./files/usr/sbin/${name}ctl \$(1)/usr/sbin/
endef

\$(eval \$(call BuildPackage,secubox-app-$name))
MAKEEOF

	# Generate UCI config
	cat > "$pkg_dir/files/etc/config/$name" << UCIEOF
config main 'main'
	option enabled '0'
	option container '$name'
	option memory '$memory'
	option data_path '/srv/$name'
UCIEOF

	# Generate init script
	cat > "$pkg_dir/files/etc/init.d/$name" << 'INITEOF'
#!/bin/sh /etc/rc.common

START=95
STOP=10
EXTRA_COMMANDS="status"
EXTRA_HELP="	status	Show container status"

CONF="APPNAME"

load_config() {
	. /lib/functions.sh
	config_load "$CONF"
	config_get ENABLED main enabled "0"
	config_get CONTAINER main container "APPNAME"
}

start() {
	load_config
	[ "$ENABLED" != "1" ] && { echo "APPNAME disabled"; return 0; }

	if lxc-info -n "$CONTAINER" 2>/dev/null | grep -q "RUNNING"; then
		echo "APPNAME already running"
	else
		echo "Starting APPNAME..."
		lxc-start -n "$CONTAINER" -d
		sleep 3
		lxc-info -n "$CONTAINER" | grep State
	fi
}

stop() {
	load_config
	if lxc-info -n "$CONTAINER" 2>/dev/null | grep -q "RUNNING"; then
		echo "Stopping APPNAME..."
		lxc-stop -n "$CONTAINER"
	else
		echo "APPNAME not running"
	fi
}

restart() {
	stop
	sleep 2
	start
}

status() {
	load_config
	lxc-info -n "$CONTAINER" 2>/dev/null || echo "Container not found"
}
INITEOF
	sed -i "s/APPNAME/$name/g" "$pkg_dir/files/etc/init.d/$name"
	chmod +x "$pkg_dir/files/etc/init.d/$name"

	# Generate CLI tool
	cat > "$pkg_dir/files/usr/sbin/${name}ctl" << 'CTLEOF'
#!/bin/sh
# Generated by RezApp Forge

CONF="APPNAME"
CONTAINER="APPNAME"

. /lib/functions.sh

load_config() {
	config_load "$CONF"
	config_get CONTAINER main container "APPNAME"
}

usage() {
	cat << EOF
Usage: APPNAMEctl <command>

Commands:
  start       Start container
  stop        Stop container
  restart     Restart container
  status      Show status
  logs        Show logs
  shell       Open shell
  enable      Enable autostart
  disable     Disable autostart
EOF
}

case "$1" in
	start)   /etc/init.d/APPNAME start ;;
	stop)    /etc/init.d/APPNAME stop ;;
	restart) /etc/init.d/APPNAME restart ;;
	status)  /etc/init.d/APPNAME status ;;
	logs)    load_config; lxc-attach -n "$CONTAINER" -- tail -100 /var/log/*.log 2>/dev/null ;;
	shell)   load_config; lxc-attach -n "$CONTAINER" -- /bin/sh ;;
	enable)  uci set APPNAME.main.enabled=1; uci commit APPNAME; echo "Enabled" ;;
	disable) uci set APPNAME.main.enabled=0; uci commit APPNAME; echo "Disabled" ;;
	*) usage ;;
esac
CTLEOF
	sed -i "s/APPNAME/$name/g" "$pkg_dir/files/usr/sbin/${name}ctl"
	chmod +x "$pkg_dir/files/usr/sbin/${name}ctl"

	log_info "Package generated: $pkg_dir"
	echo ""
	echo "To build:"
	echo "  1. rsync -av $pkg_dir/ secubox-tools/local-feed/secubox-app-$name/"
	echo "  2. ./secubox-tools/local-build.sh build secubox-app-$name"
}

# ==========================================
# Publish Command
# ==========================================

cmd_publish() {
	local name="$1"

	[ -z "$name" ] && { log_error "App name required"; return 1; }

	local app_dir="$APPS_DIR/$name"
	local meta_file="$app_dir/metadata.json"
	local catalog_dir="/usr/share/secubox/plugins/catalog"

	[ ! -f "$meta_file" ] && { log_error "App not found: $name"; return 1; }

	# Load metadata
	local source_image=$(jsonfilter -i "$meta_file" -e '@.source_image')

	log_info "Publishing $name to catalog..."

	mkdir -p "$catalog_dir"

	cat > "$catalog_dir/$name.json" << CATEOF
{
  "id": "$name",
  "name": "$name",
  "category": "utilities",
  "runtime": "lxc",
  "maturity": "community",
  "description": "Converted from $source_image via RezApp Forge",
  "source": {
    "docker_image": "$source_image"
  },
  "packages": ["secubox-app-$name"],
  "capabilities": ["lxc-container"],
  "requirements": {
    "arch": ["aarch64"],
    "min_ram_mb": 256,
    "min_storage_mb": 500
  },
  "actions": {
    "install": "${name}ctl enable",
    "status": "${name}ctl status"
  }
}
CATEOF

	log_info "Published to: $catalog_dir/$name.json"
}

# ==========================================
# List Command
# ==========================================

cmd_list() {
	echo "Converted Apps:"
	echo "==============="

	if [ -d "$APPS_DIR" ]; then
		for app in "$APPS_DIR"/*/metadata.json; do
			[ -f "$app" ] || continue
			local name=$(dirname "$app")
			name="${name##*/}"
			local image=$(jsonfilter -i "$app" -e '@.source_image')
			printf "  %-20s %s\n" "$name" "$image"
		done
	else
		echo "  (none)"
	fi
}

# ==========================================
# Help
# ==========================================

usage() {
	cat << EOF
RezApp Forge - Docker to SecuBox Converter

Usage: rezappctl <command> [options]

Catalog Commands:
  catalog list              List enabled catalogs
  catalog add <name> [ns]   Add catalog (optional namespace)
  catalog remove <name>     Remove catalog

Search:
  search <query>            Search Docker Hub
  info <image>              Show image details

Convert:
  convert <image> [opts]    Convert Docker image to LXC
    --name <name>           App name (default: from image)
    --tag <tag>             Image tag (default: latest)
    --memory <limit>        Memory limit (default: 512M)
    --network <type>        Network type (default: host)

Package:
  package <name>            Generate SecuBox package
  publish <name>            Add to app catalog

List:
  list                      Show converted apps

Examples:
  rezappctl search heimdall
  rezappctl convert linuxserver/heimdall --name heimdall
  rezappctl package heimdall
  rezappctl publish heimdall

EOF
}

# ==========================================
# Main
# ==========================================

load_config
ensure_dirs

case "$1" in
	catalog)
		case "$2" in
			list) cmd_catalog_list ;;
			add) shift 2; cmd_catalog_add "$@" ;;
			remove) shift 2; cmd_catalog_remove "$@" ;;
			*) usage ;;
		esac
		;;
	search) shift; cmd_search "$@" ;;
	info) shift; cmd_info "$@" ;;
	convert) shift; cmd_convert "$@" ;;
	package) shift; cmd_package "$@" ;;
	publish) shift; cmd_publish "$@" ;;
	list) cmd_list ;;
	help|--help|-h) usage ;;
	*) usage ;;
esac