-- Lesson 30:  In A Cabinet.  The finished script, exactly as the lesson ends.

dofile("Singe/Framework.singe")

local ROUND_MS  = 15000
local MENU      = { "Coins per credit", "Difficulty", "Free play", "Clear high score", "Exit service" }
local HARDNESS  = { "Easy", "Normal", "Hard" }

local coinsPerCredit = saveGet("coinsPerCredit", 1)
local difficulty     = saveGet("difficulty", 2)
local freePlay       = saveGet("freePlay", false)
local best           = saveGet("best", 0)

local state    = "attract"
local goBackTo = "attract"
local coins    = 0
local credits  = 0
local score    = 0
local endsAt   = 0
local item     = 1
local saying   = ""
local hasBezel = false


local function wrap(value, low, high)
    if value < low then
        return high
    end
    if value > high then
        return low
    end
    return value
end


local function canStart()
    return freePlay or credits > 0
end


local function insertCoin()
    coins = coins + 1
    while coins >= coinsPerCredit do
        coins   = coins - coinsPerCredit
        credits = credits + 1
    end
end


local function startGame()
    if not freePlay then
        credits = credits - 1
    end
    score  = 0
    endsAt = singeGetTicks() + ROUND_MS
    state  = "play"
end


local function endGame()
    if score > best then
        best = score
        saveSet("best", best)
    end
    saveFlush()
    endsAt = singeGetTicks() + 5000
    state  = "over"
end


local function settingOf(which)
    if which == 1 then
        return tostring(coinsPerCredit)
    elseif which == 2 then
        return HARDNESS[difficulty]
    elseif which == 3 then
        if freePlay then
            return "on"
        end
        return "off"
    elseif which == 4 then
        return tostring(best)
    end
    return ""
end


local function adjust(step)
    if item == 1 then
        coinsPerCredit = wrap(coinsPerCredit + step, 1, 4)
        saveSet("coinsPerCredit", coinsPerCredit)
    elseif item == 2 then
        difficulty = wrap(difficulty + step, 1, #HARDNESS)
        saveSet("difficulty", difficulty)
    elseif item == 3 then
        freePlay = not freePlay
        saveSet("freePlay", freePlay)
    end
    saveFlush()
end


local function serviceInput(what)
    if what == SWITCH_UP then
        item = wrap(item - 1, 1, #MENU)
    elseif what == SWITCH_DOWN then
        item = wrap(item + 1, 1, #MENU)
    elseif what == SWITCH_LEFT then
        adjust(-1)
    elseif what == SWITCH_RIGHT then
        adjust(1)
    elseif what == SWITCH_BUTTON1 then
        if item == 4 then
            best = 0
            saveSet("best", 0)
            saveFlush()
            saying = "High score cleared."
        elseif item == 5 then
            state = goBackTo
        end
    elseif what == SWITCH_BUTTON2 or what == SWITCH_SERVICE then
        state = goBackTo
    end
end


function onInputPressed(what)
    if what == SWITCH_QUIT then
        if state == "confirm" then
            singeQuit()
        else
            goBackTo = state
            state    = "confirm"
        end
        return
    end

    if state == "confirm" then
        if what == SWITCH_BUTTON2 then
            state = goBackTo
        end
        return
    end

    if state == "service" then
        serviceInput(what)
        return
    end

    if what == SWITCH_SERVICE then
        goBackTo = state
        saying   = ""
        state    = "service"
        return
    end

    if what == SWITCH_COIN1 then
        insertCoin()
        return
    end

    if state == "play" then
        if what == SWITCH_BUTTON1 then
            score = score + 10 * difficulty
        end
        return
    end

    if what == SWITCH_START1 and canStart() then
        startGame()
    end
end


local function drawAttract()
    overlayPrint(2, 2, "ROCK DODGER")
    if canStart() then
        overlayPrint(2, 4, "PRESS START")
    elseif (singeGetTicks() // 400) % 2 == 0 then
        overlayPrint(2, 4, "INSERT COIN")
    end
    overlayPrint(2, 6, "High score  " .. best)
end


local function drawService()
    overlayPrint(2, 0, "SERVICE MENU")
    for row, name in ipairs(MENU) do
        if row == item then
            overlayPrint(1, row + 1, ">")
        end
        overlayPrint(3, row + 1, name)
        overlayPrint(24, row + 1, settingOf(row))
    end
    overlayPrint(2, 8, saying)
    overlayPrint(2, 10, "Singe " .. SINGE_VERSION_STRING .. "   rotation " .. vldpGetRotate())
    if hasBezel then
        overlayPrint(2, 11, "Bezel artwork loaded.")
    else
        overlayPrint(2, 11, "No bezel artwork.")
    end
    overlayPrint(2, 12, singeGetDataPath())
    overlayPrint(2, 16, "Up/Down choose.  Left/Right change.  Button 1 does it.")
    overlayPrint(2, 17, "Button 2 or the service switch leaves.")
end


function onOverlayUpdate()
    overlayClear()

    if state == "play" and singeGetTicks() >= endsAt then
        endGame()
    elseif state == "over" and singeGetTicks() >= endsAt then
        state = "attract"
    end

    if state == "service" then
        drawService()
    elseif state == "confirm" then
        overlayPrint(2, 2, "QUIT THIS GAME?")
        overlayPrint(2, 4, "Quit again to quit.  Button 2 stays.")
    elseif state == "play" then
        overlayPrint(2, 2, "SCORE  " .. score)
        overlayPrint(2, 3, "TIME   " .. ((endsAt - singeGetTicks()) // 1000))
        overlayPrint(2, 5, "Button 1 scores.  " .. HARDNESS[difficulty] .. ".")
    elseif state == "over" then
        overlayPrint(2, 2, "GAME OVER")
        overlayPrint(2, 4, "You scored " .. score .. ".")
        overlayPrint(2, 6, "High score  " .. best)
    else
        drawAttract()
    end

    if state ~= "service" then
        overlayPrint(2, 17, "CREDITS " .. credits .. "   COINS " .. coins .. "/" .. coinsPerCredit)
    end

    return OVERLAY_UPDATED
end


singeSetQuitKeyEnabled(false)
hasBezel = mainBezelLoaded()
if hasBezel then
    setOverlayOnTop(true)
end