local args = { ... }
local ccpi = require("ccpi")
local bigterm = require("bigterm")

local conf_path = "/bigterm.json"
if args[1] == "-c" then
    table.remove(args, 1)
    conf_path = table.remove(args, 1)
end
local screen = bigterm.fromFile(conf_path)

local time = 10
if args[1] == "-t" then
    table.remove(args, 1)
    time = tonumber(table.remove(args, 1))
end

local files = fs.list(args[1])

while true do
    local img, err = ccpi.load(fs.combine(args[1], files[math.random(1, #files)]))
    if not img then
        printError(err)
        return
    else
        local ys = {}
        for y = 1, img.h do table.insert(ys, y) end

        for i = 1, math.floor((#ys) / 2), 2 do
            local a, b = i, (#ys - 1) - i + 1
            ys[a], ys[b] = ys[b], ys[a]
        end

        for i, y in ipairs(ys) do
            screen.setCursorPos(1, y)
            screen.blit(img.lines[y].s, img.lines[y].fg, img.lines[y].bg)
            if (i % 10) == 0 then
                os.sleep(0)
            end
        end

        for i = 1, 16 do
            screen.setPaletteColor(bit.blshift(1, i - 1), img.palette[i])
        end
    end
    os.sleep(time)
end