--[[
    the main user interface for memoire
]]

--[[
    check action based on first command-line argument;
    if nothing valid given, default to help
]]
local action = nil
if arg[1] then
    local fc = arg[1]:sub(1, 1)
    if fc == "a" or fc == "h" or fc == "r" or fc == "s" then
        action = fc
    else
        action = "h"
    end
else
    action = "h"
end

--[[
    repository file is hardcoded for now;
    TODO: should be controllable by user in the future
]]
local deckfname = "example.rec"

--[[
    do requested action
]]
-- Add card(s)
if action == "a" then
    -- TODO
-- Help
elseif action == "h" then
    io.write(string.format(
        "Usage: %s ACTION\n\nACTION may be one of\n    (a)dd card\n    (h)elp\n    (r)eview session\n    (s)tatistics\n",
        arg[0]
    ))
-- Review session
elseif action == "r" then
    -- TODO
-- Statistics
elseif action == "s" then
    -- TODO
else
    io.write "unreachable"
end