local util = require("modules/util")

-- RAM amount in GB
local function get_ram_gb()
    local free, total, avail

    util.for_line_in_file("/proc/meminfo", function(line)
        local total_match  = line:match("^MemTotal%s*:%s*(.+)%s*[kK][bB]")
        local avail_match = line:match("^MemAvailable%s*:%s*(.+)%s*[kK][bB]")

        if total_match then
            total = tonumber(total_match)
        end

        if avail_match then
            avail = tonumber(avail_match)
        end

        if total and avail then
            free = string.format("%.1f GB", (total - avail) / 1000000)
        end

        return free ~= nil
    end)

    return free
end

return { name = "ram", cmd = get_ram_gb }