#!/opt/lnxall_app/bin/lua

local invoker = require "invoker"
local cjson = require "cjson"
local module = {}

local FRPC_API_URL = "http://127.0.0.1:7400/api/status"
local FRPC_API_AUTH = "dywl:dywlfrp123"

function module.checkplat()
	return true
end

function module.category()
	return "网络设置"
end

function module.description()
	return "检查 FRPC 状态"
end

function module.detailed()
	return "获取 frpc 版本信息, 并检查 frpc 进程是否正在运行."
end

function module.suggestion()
	return "1. '域名已被使用': /etc/frpc.toml 修改为: subdomain = \"\", 然后执行: systemctl restart frpc"
end

local function parse_proxy_errors(api_status)
	if type(api_status) ~= "string" then
		return nil
	end

	local ok, status_doc = pcall(cjson.decode, api_status)
	if not ok or type(status_doc) ~= "table" then
		return nil
	end

	local errors = {}
	for _, proxies in pairs(status_doc) do
		if type(proxies) == "table" then
			for _, item in ipairs(proxies) do
				local name = type(item) == "table" and item.name or nil
				local status = type(item) == "table" and item.status or nil
				local err = type(item) == "table" and item.err or nil
				if status and status ~= "running" and type(err) == "string" and
					#err > 0 then
					errors[#errors + 1] = {
						name = name,
						status = status,
						err = err,
					}
				end
			end
		end
	end

	if #errors > 0 then
		return errors
	end

	return nil
end

function module.step()
	local _, version = invoker.invoke(invoker.OUTPUT + invoker.TRIMEND,
		"frpc", "--version")
	if type(version) ~= "string" then
		version = ""
	end

	local _, pidof_out = invoker.invoke(invoker.OUTPUT + invoker.TRIMEND,
		"pidof", "frpc")
	if type(pidof_out) ~= "string" then
		pidof_out = ""
	end

	local running = #pidof_out > 0
	local proxy_errors = nil

	if running then
		local _, api_out = invoker.invoke(invoker.OUTPUT, "curl", "-fsS",
			"--max-time", "3", "-u", FRPC_API_AUTH, FRPC_API_URL)
		if type(api_out) == "string" then
			proxy_errors = parse_proxy_errors(api_out)
		end
	end

	local has_error = not running or proxy_errors ~= nil

	return {
		frpc_version = version,
		frpc_running = running,
		proxy_errors = proxy_errors,
	}, has_error
end

return module