#!/bin/bash

# CFG↔docker subnet adoption: if the docker network already exists with a
# different subnet than CFG, treat docker's value as the truth and update CFG.
# This realigns CFG ONLY — it does NOT touch already-allocated per-app IPs.
# Because IPs are pinned to the first three octets of the old subnet
# (ipFindAvailable), adopting a different /24 base strands every existing app
# IP outside docker's real subnet. Those apps need re-IPing from the corrected
# subnet: automatically via the network-drift detector + `libreportal system
# network heal`, or manually per app via `libreportal app install <name>
# --reset-network` (fresh compose + fresh IPs through the idempotent install).
adoptDockerSubnet()
{
	local current_subnet="$1"
	[[ -z "$current_subnet" ]] && return 0
	updateConfigOption "CFG_NETWORK_SUBNET" "$current_subnet"
	CFG_NETWORK_SUBNET="$current_subnet"
	isSuccessful "Adopted docker's subnet into CFG: $current_subnet"
}

checkDockerNetworkRequirement()
{
	if [[ $CFG_REQUIREMENT_DOCKER_NETWORK == "true" ]]; then
		if [[ $CFG_DOCKER_INSTALL_TYPE == "rootless" ]]; then
			if dockerCommandRun "docker network inspect $CFG_NETWORK_NAME > /dev/null 2>&1"; then
				local current_subnet=$(dockerCommandRun "docker network inspect $CFG_NETWORK_NAME --format '{{range .IPAM.Config}}{{.Subnet}}{{end}}' 2>/dev/null")

				if [[ "$current_subnet" == "$CFG_NETWORK_SUBNET" ]]; then
					isSuccessful "Docker Network $CFG_NETWORK_NAME exists with matching subnet"
				else
					adoptDockerSubnet "$current_subnet"
				fi
			else
				isNotice "Docker Network $CFG_NETWORK_NAME not found."
				DOCKER_NETWORK_SETUP_NEEDED="true"
				((preinstallneeded++))
			fi
		elif [[ $CFG_DOCKER_INSTALL_TYPE == "rooted" ]]; then
			if runFileOp docker network inspect $CFG_NETWORK_NAME > /dev/null 2>&1; then
				local current_subnet=$(runFileOp docker network inspect $CFG_NETWORK_NAME --format '{{range .IPAM.Config}}{{.Subnet}}{{end}}' 2>/dev/null)

				if [[ "$current_subnet" == "$CFG_NETWORK_SUBNET" ]]; then
					isSuccessful "Docker Network $CFG_NETWORK_NAME exists with matching subnet"
				else
					adoptDockerSubnet "$current_subnet"
				fi
			else
				isNotice "Docker Network $CFG_NETWORK_NAME not found."
				DOCKER_NETWORK_SETUP_NEEDED="true"
				((preinstallneeded++))
			fi
		fi
	fi
}