-- Lesson 29:  Shipping It.  The finished script, exactly as the lesson ends.

dofile("Singe/Framework.singe")

local GAME_NAME    = "Rock Dodger"
local GAME_VERSION = "1.0.2"

local CREDITS = {
    "Written and drawn by   <your name here>",
    "",
    "Music                  \"Night Drive\" by A. Composer",
    "                       Creative Commons BY 4.0",
    "                       example.org/night-drive",
    "",
    "Explosion              freesound.org user \"thud\"",
    "                       Creative Commons CC0",
    "",
    "Font                   FreeSansBold",
    "                       GPL with the font exception",
    "",
    "Engine                 Singe " .. SINGE_VERSION_STRING,
    "                       GPL version 3",
    "                       See Singe/LICENSES for the",
    "                       libraries Singe is built on.",
    "",
    "Thank you for playing.",
}

local FIRST_ROW = 4
local ROWS      = 10

local scroll = 0


local function scrollBy(lines)
    local most = #CREDITS - ROWS

    if most < 0 then
        most = 0
    end
    scroll = scroll + lines
    if scroll < 0 then
        scroll = 0
    end
    if scroll > most then
        scroll = most
    end
end


function onInputPressed(what)
    if what == SWITCH_UP then
        scrollBy(-1)
    elseif what == SWITCH_DOWN then
        scrollBy(1)
    elseif what == SWITCH_BUTTON1 then
        scroll = 0
    end
end


function onOverlayUpdate()
    local line = nil

    overlayClear()
    overlayPrint(2, 0, GAME_NAME .. "  version " .. GAME_VERSION)
    overlayPrint(2, 1, "Singe " .. SINGE_VERSION_STRING .. "   id " .. (singeGetGameId() or "none"))

    for row = 0, ROWS - 1 do
        line = CREDITS[scroll + row + 1]
        if line then
            overlayPrint(2, FIRST_ROW + row, line)
        end
    end

    overlayPrint(2, FIRST_ROW + ROWS + 1, "Saves go to:")
    overlayPrint(2, FIRST_ROW + ROWS + 2, singeGetDataPath())
    overlayPrint(2, 17, "Up and down scroll.  Button 1 goes back to the top.")

    return OVERLAY_UPDATED
end