-- Forge tutorial 2, "A platformer":  types from the kit, entities dragged into place, rules on
-- the enter event, and a second room reached through a door.  Continues from tutorial 1.
TUTORIAL = { number = 2, name = "02-platformer", tag = "TUTORIAL2" }
dofile("testScripts/tutorialDrive.singe")

local frames = 0
local stage  = 0
local game   = nil

tutorialBegin("01-tenMinutes")


-- Lights a type in the types panel with the arrow keys, as a reader would.
local function lightType(name)
	local names = {}
	local from, to = 1, 1

	for typeName in pairs(FORGE.game.types) do
		names[#names + 1] = typeName
	end
	table.sort(names)
	for at, typeName in ipairs(names) do
		if typeName == FORGE.typeName then
			from = at
		end
		if typeName == name then
			to = at
		end
	end
	for _ = 1, math.abs(to - from) do
		key((to > from) and SCANCODE.DOWN or SCANCODE.UP)
	end
end


-- A type from the kit:  A adds one, and the form names it, gives it a sprite from the kit, and
-- makes it a trigger.
local function kitType(name, file, anchor)
	key(SCANCODE.MAIN_2)
	key(SCANCODE.A)
	form("name", name)
	form("look", "sprite")
	form("look.file", file)
	if anchor then
		form("look.anchor", anchor)
	end
	form("behaviours", "trigger")
end


-- An entity of the lit type, added and dragged to a spot.
local function place(x, y)
	key(SCANCODE.MAIN_1)
	key(SCANCODE.A)
	local entry = forgeRoom().entities[FORGE.selected]

	forgePress(entry.x, entry.y)
	forgeDrag(x, y)
	forgeRelease()
	debugPrint(string.format("%s placed %s at %d, %d (held was %s)", TUTORIAL.tag, entry.id, entry.x, entry.y, tostring(FORGE.selected)))
end


local function step()
	if stage == 1 then
		kitType("coin", "coin.png")
		tutorialShot("coinType")

	elseif stage == 2 then
		place(300, 392)
		key(SCANCODE.D)
		forgePress(320, 412)
		forgeDrag(420, 392)
		forgeRelease()
		key(SCANCODE.D)
		forgePress(440, 412)
		forgeDrag(560, 300)
		forgeRelease()
		tutorialShot("coins")

	elseif stage == 3 then
		kitType("spike", "spike.png", "feet")
		place(640, 420)
		kitType("door", "door.png", "feet")
		place(700, 420)
		tutorialShot("placed")

	elseif stage == 4 then
		-- The first rule:  a coin is taken.
		key(SCANCODE.MAIN_3)
		key(SCANCODE.N)
		form("note", "Take a coin")
		key(SCANCODE.E)
		pick("enter")
		form("a", "coin")
		form("b", "hero")
		key(SCANCODE.T)
		pick("addScore")
		form("amount", 10)
		key(SCANCODE.T)
		pick("destroy")
		key(SCANCODE.T)
		pick("playSound")
		form("file", "coin.wav")
		tutorialShot("rule")

	elseif stage == 5 then
		key(SCANCODE.N)
		form("note", "Spikes hurt")
		key(SCANCODE.E)
		pick("enter")
		form("a", "spike")
		form("b", "hero")
		key(SCANCODE.T)
		pick("moveTo")
		form("entity", "hero")
		form("x", 200)
		form("y", 380)
		key(SCANCODE.T)
		pick("playSound")
		form("file", "hit.wav")
		key(SCANCODE.N)
		form("note", "Through the door")
		key(SCANCODE.E)
		pick("enter")
		form("a", "door")
		form("b", "hero")
		key(SCANCODE.T)
		pick("goTo")
		form("room", "cave")
		form("entity", "hero")
		form("x", 60)
		form("y", 380)
		tutorialShot("rules")

	elseif stage == 6 then
		-- The second room:  ground, a coin, and the readout.
		key(SCANCODE.MAIN_1)
		key(SCANCODE.N)
		form("name", "cave")
		key(SCANCODE.MAIN_2)
		lightType("ground")
		place(360, 440)
		key(SCANCODE.MAIN_2)
		lightType("readout")
		place(12, 12)
		key(SCANCODE.MAIN_2)
		lightType("coin")
		place(400, 392)
		tutorialShot("cave")

	elseif stage == 7 then
		key(SCANCODE.S)
		local built = tutorialEnd()
		local mine  = onOverlayUpdate

		dofile(built)
		game            = onOverlayUpdate
		onOverlayUpdate = mine
		authorKeyDown(0, SCANCODE.RIGHT.value)

	elseif stage == 10 then
		tutorialShot("playing")
	elseif stage == 12 then
		local coins = authorCount and authorCount("coin") or -1

		debugPrint(TUTORIAL.tag .. " after running right the score is " .. tostring(AUTHOR_VARS and AUTHOR_VARS.score) .. " and " .. tostring(coins) .. " coins remain")
		debugPrint(TUTORIAL.tag .. " RESULT done")
		singeQuit()
	end
end


function onOverlayUpdate()
	frames = frames + 1
	if frames % 12 == 0 and stage < 12 then
		stage = stage + 1
		step()
	end
	if game ~= nil then
		return game()
	end
	forgeDraw(nil, nil)

	return OVERLAY_UPDATED
end