-- print("Text to draw : ")
-- text = read()
speed = 0.1
marge = 3


screen = peripheral.wrap("left")
debug = peripheral.wrap("bottom")
width, height = screen.getSize()

function debug_write(text,line)
    debug.setCursorPos(1,line)
    debug.write(text)
end


start_char = {"/", "|", "\\"}
end_char = {"\\", "|", "/"}

function generate_center_text(text, pos_y, dir)
    return {
        content=text,
        pos={x=-#text, y=pos_y or height/2},
        direction = dir or "none",
        borne={min=4,max=30}
    }
end

function draw_cadre(text_pos, text_w)
    start_height = text_pos.y - 1
    for h=0,2,1 do
        new_line = ""
        new_line = start_char[h+1]..new_line
        for w=1,text_w,1 do
            new_line = new_line.."-"
        end
        new_line = new_line..end_char[h+1]
        screen.setCursorPos(text_pos.x-1, start_height+h)
        screen.write(new_line)
    end
end

function update_text_pos(text)
    -- debug_write(text.borne.min.."/"..text.borne.max, 1)
    debug_write(text.pos.x < text.borne.max and text.direction == "right",1)
    debug_write(text.direction, 2)
    debug_write(text.pos.x,3)
    debug_write(text.borne.max,4)
    if text.direction ~= "none" then
        if text.direction == "right" then
            if text.pos.x < text.borne.max then
                text.pos.x = text.pos.x + 1
            else
                text.direction = "left"
            end
        elseif text.direction == "left" then
            if text.pos.x > text.borne.min then
                text.pos.x = text.pos.x - 1
            else
                text.direction = "right"
            end
        end
    else
        print(text.content.."ne bouge pas")
    end
end

function draw_text(text_obj)
    f_pos = {
        x=text_obj.pos.x - #text_obj.content/2,
        y=text_obj.pos.y - 1
    }

    draw_cadre(f_pos, #text_obj.content)
    screen.setCursorPos(f_pos.x, f_pos.y)
    screen.write(text_obj.content)
end

-- list = {"Salut", "Les", "P'tits", "Amis"}
-- text_list = {}
-- for i=1,#list,1 do
--     table.insert(text_list, generate_center_text(list[i], i*marge, "right", 40))
-- end

text = generate_center_text("Salut", 3, "right")

while true do
    screen.clear()
    update_text_pos(text)
    draw_text(text)
    sleep(speed)
end