local M = {}

local logLines = {}
local maxLines = 5

function M.log(msg)
    local time = textutils.formatTime(os.time(), true)
    local entry = string.format("[%s] %s", time, msg)

    table.insert(logLines, entry)
    if #logLines > maxLines then
        table.remove(logLines, 1)
    end

    M.draw()
end

function M.draw()
    local w, h = term.getSize()
    for i = 1, maxLines do
        term.setCursorPos(1, h - maxLines + i)
        term.clearLine()
        if logLines[i] then
            term.write(logLines[i])
        end
    end
end

return M