--[[

	Flying Saucer Training

	This is a training mission which teaches many basic (and not-so-basic) moves

	with the flying saucer.

	Lesson plan:

	- Taking off

	- Basic flight

	- Landing safely

	- Managing fuel

	- Changing saucers in mid-flight

	- Diving

	- Dropping weapons from flying saucer

	- Firing from flying saucer with [Precise] + [Attack]

	- Aiming in flying saucer with [Precise] + [Up]/[Down]

	- Underwater attack

	- Free flight with inf. fuel and some weapons at end of training

	FIXME:

	- Bad respawn animation ("explosion" just happens randomly because of the way the resurrection effect works)

	- Hide fuel if infinite (probably needs engine support)

]]

HedgewarsScriptLoad("/Scripts/Locale.lua")

HedgewarsScriptLoad("/Scripts/Tracker.lua")

local Player = nil -- Pointer to hog created in: onGameInit

local Target = nil -- Pointer to target hog

local Objective = false -- Get to the target

local TargetNumber = 0 -- The current target number

local GrenadeThrown = false -- Used for the Boom Target

local BazookasLeft = 0 -- Used by the Launch Target and the Unterwater Attack Target

local InfFuel = false -- If true, flying saucer has infinite fuel

local SaucerGear = nil -- Store flying saucer gear here (if one exists)

local TargetGears = {} -- List of remaining gears to collect or destroy in the current round

local TargetsRemaining = 0

local Barrels = {} -- Table contraining the explosive barrel gears

local CheckTimer = 500 -- Time to wait at least before checking safe landing

local Check = false -- The last target has recently been collected/destroyed and the CheckTimer is running

local GrenadeTimer = 0 -- Time after a grenade has been thrown

local TargetPos = {} -- Table of targets

local StartPos = { X = 742, Y = 290 }

--[[

List of all targets (or "objectives"). The player has to complete them one-by-one and must always land safely afterwards.

Some target numbers have names for easier reference.

]]

-- Intro

TargetPos[1] =  {

	Targets = {{ X = 1027, Y = 217 }},

	Ammo = { },

	Message = loc("Here you will learn how to fly the flying saucer|and get so learn some cool tricks.") .. "|" ..

	loc("Collect the first crate to begin!"),

	MessageIcon = -amJetpack, }

-- First flight, infinite fuel

TargetPos[2] = {

	Targets = {{ X = 1369, Y = 265 }},

	Ammo = { [amJetpack] = 100 },

	InfFuel = true,

	MessageTime = 10000,

	Message = loc("Get to the crate using your flying saucer!") .. "|" ..

	loc("Press [Attack] (space bar by default) to start,|repeatedly tap the up, left and right movement keys to accelerate.") .. "|" ..

	loc("Try to land softly, as you can still take fall damage!"), }

-- First flight, limited fuel

TargetPos[3] = {

	Targets = {{ X = 689, Y = 58 }},

	Ammo = { [amJetpack] = 100 },

	MessageTime = 5000,

	Message = loc("Now collect the next crate!") .. "|" .. loc("Be careful, your fuel is limited from now on!") .."|" ..

	loc("Tip: If you get stuck in this training, use \"Skip turn\" to restart the current objective.") }

-- The Double Target

TargetPos[4] = {

	Targets = { { X = 178, Y = -20 }, { X = 1962 , Y = -20 } },

	Ammo = { [amJetpack] = 2 },

	CratesContainAmmo = true,

	MessageTime = 9000,

	Message = loc("Now collect the 2 crates to the far left and right.") .. "|" ..

	loc("You only have 2 flying saucers this time.") .. "|" ..

	loc("Tip: You can change your flying saucer|in mid-flight by hitting the [Attack] key twice."), }

-- Intermission

TargetPos[5] = {

	Targets = {{ X = 47, Y = 804 }},

	Ammo = { [amJetpack] = 100 },

	MessageTime = 5000,

	Message = loc("Time for a more interesting stunt, but first just collect the next crate!"), }

-- First Dive

TargetPos[6] = {

	Targets = {{ X = 604, Y = 871}},

	MessageTime = 15000,

	Message = loc("You can dive with your flying saucer!") .. "|" ..

	loc("Try it now and dive here to collect the crate on the right girder.") .. "|" ..

	loc("You only have one flying saucer this time.") .. "|" ..

	loc("Beware, though, you will only be able to move slowly through the water.") .. "|" ..

	loc("Warning: Never ever leave the flying saucer while in water!"),

	Ammo = { [amJetpack] = 1 },

	Respawn = { X = 758, Y = 847, FaceLeft = false }, }

-- Second Dive

TargetPos[7] = { 

	Targets = {{ X = 1884, Y = 704 }},

	MessageTime = 6500,

	Message = loc("Now dive just one more time and collect the next crate.") .. "|" ..

		loc("Tip: Don't remain for too long in the water, or you won't make it."),

	Ammo = { [amJetpack] = 2 }, }

-- The Grenade Drop Target

local BoomTarget = 8

TargetPos[8] = {

	Modifier = true, Func = function()

		Info(loc("Instructions"),

		loc("Now let's try to drop weapons while flying!") .. "|" ..

		loc("You have to destroy the target above by dropping a grenade on it from your flying saucer.") .. "|" ..

		loc("It's not that easy, so listen carefully:") .. "|" ..

		loc("Step 1: Activate your flying saucer but do NOT move yet!") .. "|" ..

		loc("Step 2: Select your grenade.") .. "|" ..

		loc("Step 3: Start flying and get yourself right above the target.") .. "|" ..

		loc("Step 4: Drop your grenade by pressing the [Long jump] key.") .. "|" ..

		loc("Step 5: Get away quickly and land safely anywhere.") .. "| |" ..

		loc("Note: We only give you grenades if you stay in your flying saucer."), nil, 20000)

		SpawnBoomTarget()

		if SaucerGear ~= nil then

			AddAmmo(Player, amGrenade, 1)

		else

			AddAmmo(Player, amGrenade, 0)

		end

		GrenadeThrown = false

	end,

	Ammo = { [amJetpack] = 100 },

	Respawn = { X = 2000, Y = 742, FaceLeft = true }, }

-- The Launch Target

local LaunchTarget = 9

TargetPos[9] = {

	Targets = {{ X = 1700, Y = 640, Type = gtTarget }, { X = 1460, Y = 775, Type = gtTarget }},

	MessageTime = 20000,

	Message = loc("Only the best pilots can master the following stunts.") .. "|" ..

		loc("As you've seen, the dropped grenade roughly fell into your flying direction.") .. "|" ..

		loc("You have to destroy two targets, but the previous technique would be very difficult or dangerous to use.") .. "|" ..

		loc("So you are able to launch projectiles into your aiming direction, always at full power.") .."|"..

		loc("To launch a projectile in mid-flight, hold [Precise] and press [Long jump].") .. "|" ..

		loc("You can even change your aiming direction in mid-flight if you first hold [Precise] and then press [Up] or [Down].") .. "|" ..

		loc("Tip: Changing your aim while flying is very difficult, so adjust it before you take off."),

	Ammo = { [amJetpack] = 1, },

	Respawn = { X = 1760, Y = 754, FaceLeft = true },

	ExtraFunc = function()

		if SaucerGear ~= nil then

			AddAmmo(Player, amBazooka, 2)

		else

			AddAmmo(Player, amBazooka, 0)

		end

		BazookasLeft = 2

	end }

-- The Underwater Attack Target

local UnderwaterAttackTarget = 10

TargetPos[10] = {

	MessageTime = 17000,

	Message = loc("Now for the supreme discipline of saucer flying, the underwater attack.") .. "|" ..

	loc("Basically this is a combination of diving and launching.") .. "|" ..

	loc("Dropping a weapon while in water would just drown it, but launching one would work.") .."|" ..

	loc("Based on what you've learned, destroy the target on the girder and as always, land safely!"), 

	Targets = {{ X = 1200, Y = 930, Type = gtTarget }},

	Ammo = { [amJetpack] = 1, },

	Respawn = { X = 1027, Y = 217, FaceLeft = true },

	ExtraFunc = function()

		if SaucerGear ~= nil then

			AddAmmo(Player, amBazooka, 1)

		else

			AddAmmo(Player, amBazooka, 0)

		end

		BazookasLeft = 1

	end }

-- Final target / Sandbox

TargetPos[11] = {

	Targets = {{ X = 742, Y = 290 }},

	MessageTime = 5000,

	Message = loc("This almost concludes our tutorial.") .. "|" ..

	loc("You now have infinite fuel, grenades and bazookas for fun.") .. "|" ..

	loc("Collect or destroy the final crate to finish the training."),

	Ammo = { [amJetpack] = 100, [amGrenade] = 100, [amBazooka] = 100 },

	InfFuel = true, }

-- Outro

TargetPos[12] = { Modifier = true, Func = function()

	Objective = true

	AddCaption(loc("Training complete!"), capcolDefault, capgrpGameState)

	Info(loc("Training complete!"), loc("Good bye!"), 4, 5000)

	if SaucerGear ~= nil then

		DeleteGear(SaucerGear)

	end

	SetState(Player, band(GetState(Player), bnot(gstHHDriven)))

	SetState(Player, bor(GetState(Player), gstWinner))

	PlaySound(sndVictory, Player)

	SaveMissionVar("Won", "true")

	SendStat(siGameResult, loc("You have finished the Flying Saucer Training!"))

	SendStat(siCustomAchievement, loc("Good job!"))

	SendStat(siPlayerKills, "0", GetHogTeamName(Player))

	EndTurn(true)

	EndGame()

end,

}

-- Just a wrapper for ShowMission

function Info(Title, Text, Icon, Time)

	if Time == nil then Time = 0 end

	if Icon == nil then Icon = 2 end

	ShowMission(loc("Flying Saucer Training"), Title, Text, Icon, Time)

end

-- Spawn all the gears for the Boom Target

function SpawnBoomTarget()

	if TargetsRemaining < 1 then

		TargetGears[1] = AddGear(1602, 507, gtTarget, 0, 0, 0, 0)

		TargetsRemaining = TargetsRemaining + 1

	end

	if Barrels[1] == nil then

		Barrels[1] = AddGear(1563, 532, gtExplosives, 0, 0, 0, 0)

	end

	if Barrels[2] == nil then

		Barrels[2] = AddGear(1648, 463, gtExplosives, 0, 0, 0, 0)

	end

	for i=1,#Barrels do

		SetHealth(Barrels[i], 1)

	end

end

-- Generic target spawning for the current target

function SpawnTargets()

	for i=1,#TargetPos[TargetNumber].Targets do

		if TargetGears[i] == nil then

			SpawnTarget(TargetPos[TargetNumber].Targets[i].X, TargetPos[TargetNumber].Targets[i].Y,

				TargetPos[TargetNumber].Targets[i].Type, i, TargetPos[TargetNumber].CratesContainAmmo )

		end

	end

end

function SpawnTarget( PosX, PosY, Type, ID, ContainsAmmo )

	if Type ~= nil and Type ~= gtCase then

		if Type == gtTarget then

			TargetGears[ID] = AddGear(PosX, PosY, gtTarget, 0, 0, 0, 0)

		end

	else

		if ContainsAmmo == true then

			TargetGears[ID] = SpawnSupplyCrate(PosX, PosY, amJetpack)

		else

			TargetGears[ID] = SpawnFakeUtilityCrate(PosX, PosY, false, false)

		end

	end

	TargetsRemaining = TargetsRemaining + 1

end

function AutoSpawn() -- Auto-spawn the next target after you've obtained the current target!

	TargetNumber = TargetNumber + 1

	TargetsRemaining = 0

	if TargetPos[TargetNumber].Ammo then

		for ammoType, count in pairs(TargetPos[TargetNumber].Ammo) do

			AddAmmo(Player, ammoType, count)

		end

		if GetCurAmmoType() ~= amJetpack then

			SetWeapon(amJetpack)

		end

	end

	if TargetPos[TargetNumber].InfFuel then

		InfFuel = true

	else

		InfFuel = false

	end

	UpdateInfFuel()

	-- Func (if present) will be run instead of the ordinary spawning handling

	if TargetPos[TargetNumber].Modifier then -- If there is a modifier, run the function

		TargetPos[TargetNumber].Func()

		return true

	end

	-- ExtraFunc is for additional events for a target

	if TargetPos[TargetNumber].ExtraFunc ~= nil then

		TargetPos[TargetNumber].ExtraFunc()

	end

	local subcap

	if TargetNumber == 1 then

		subcap = loc("Training")

	else

		subcap = loc("Instructions")

	end

	Info(subcap, TargetPos[TargetNumber].Message, TargetPos[TargetNumber].MessageIcon, TargetPos[TargetNumber].MessageTime)

	-- Spawn targets on the next position

	SpawnTargets()

	if TargetNumber > 1 then

		AddCaption(loc("Next target is ready!"), capcolDefault, capgrpMessage2)

	end

end

-- Returns true if the hedgehog has safely "landed" (alive, no flying saucer gear and not moving)

-- This is to ensure the training only continues when the player didn't screw up and to restart the current target

function HasHedgehogLandedYet()

	if band(GetState(Player), gstMoving) == 0 and SaucerGear == nil and GetHealth(Player) > 0 then

		return true

	else

		return false

	end

end

-- Clean up the gear mess left behind when the player failed to get a clean state after restarting

function CleanUpGears()

	-- (We track flames, grenades, bazooka shells)

	runOnGears(DeleteGear)

end

-- Completely restarts the current target/objective; the hedgehog is spawned at the last "checkpoint"

-- Called when hedgeghog is resurrected or skips turn

function ResetCurrentTarget()

	GrenadeThrown = false

	GrenadeTimer = 0

	if TargetNumber == LaunchTarget then

		BazookasLeft = 2

	elseif TargetNumber == UnderwaterAttackTarget then

		BazookasLeft = 1

	else

		BazookasLeft = 0

	end

	Check = false

	CleanUpGears()

	local X, Y, FaceLeft

	if TargetNumber == 1 then

		X, Y = StartPos.X, StartPos.Y

	else

		if TargetPos[TargetNumber-1].Modifier or TargetPos[TargetNumber-1].Respawn ~= nil then

			X, Y = TargetPos[TargetNumber-1].Respawn.X, TargetPos[TargetNumber-1].Respawn.Y

			FaceLeft = TargetPos[TargetNumber-1].Respawn.FaceLeft

		else

			X, Y = TargetPos[TargetNumber-1].Targets[1].X, TargetPos[TargetNumber-1].Targets[1].Y

		end

	end

	if TargetNumber == BoomTarget then

		SpawnBoomTarget()

	end

	if TargetPos[TargetNumber].Modifier ~= true then

		SpawnTargets()

	end

	if TargetPos[TargetNumber].Ammo then

		for ammoType, count in pairs(TargetPos[TargetNumber].Ammo) do

			AddAmmo(Player, ammoType, count)

		end

		if GetCurAmmoType() ~= amJetpack then

			SetWeapon(amJetpack)

		end

	end

	if TargetPos[TargetNumber].InfFuel then

		InfFuel = true

	else

		InfFuel = false

	end

	UpdateInfFuel()

	SetGearPosition(Player, X, Y)

	if FaceLeft ~= nil then

		HogTurnLeft(Player, FaceLeft)

	end

end

function onGameInit()

	Seed = 1

	GameFlags = gfInfAttack + gfOneClanMode + gfSolidLand + gfDisableWind

	TurnTime = MAX_TURN_TIME --[[ This effectively hides the turn time; a turn time above 1000s is not displayed.

			   	     We will also ensure this timer always stays above 999s later ]]

	CaseFreq = 0

	MinesNum = 0

	Explosives = 0

	Map = "Eyes"

	Theme = "EarthRise"

	SuddenDeathTurns = 50

	WaterRise = 0

	HealthDecrease = 0

	AddMissionTeam(-9)

	Player = AddMissionHog(1)

	SetGearPosition( Player, StartPos.X, StartPos.Y)

	SetEffect( Player, heResurrectable, 1 )

end

function onGameStart()

	SendHealthStatsOff()

	-- Girder near first crate

	PlaceGirder(1257, 204, 6)

	-- The upper girders

	PlaceGirder(84, 16, 4)

	PlaceGirder(243, 16, 4)

	PlaceGirder(1967, 16, 4)

	-- The lower girder platform at the water pit

	PlaceGirder(509, 896, 4)

	PlaceGirder(668, 896, 4)

	PlaceGirder(421, 896, 2)

	PlaceGirder(758, 896, 2)

	-- Girders for the Launch Target and the Underwater Attack Target

	PlaceGirder(1191, 960, 4)

	PlaceGirder(1311, 960, 0)

	PlaceGirder(1460, 827, 3)

	PlaceGirder(1509, 763, 2)

	PlaceGirder(1605, 672, 4)

	PlaceGirder(1764, 672, 4)

	PlaceGirder(1803, 577, 6)

	-- Spawn our 1st target using the wrapper function

	AutoSpawn()

end

function onAmmoStoreInit()

	SetAmmo(amJetpack, 0, 0, 0, 1)

	SetAmmo(amGrenade, 0, 0, 0, 1)

	SetAmmo(amBazooka, 0, 0, 0, 1)

	-- Added for resetting current target/objective when player is stuck somehow

	SetAmmo(amSkip, 9, 0, 0, 0)

end

function onGearAdd(Gear)

	if GetGearType(Gear) == gtJetpack then

		SaucerGear = Gear

		if TargetNumber == BoomTarget and GrenadeThrown == false then

			AddAmmo(Player, amGrenade, 1)

		end

		if (TargetNumber == LaunchTarget or TargetNumber == UnderwaterAttackTarget) and BazookasLeft > 0 then

			AddAmmo(Player, amBazooka, BazookasLeft)

		end

		UpdateInfFuel()

		-- If player starts using saucer, the player probably finished reading and the mission panel

		-- would just get in the way. So we hide it!

		HideMission()

	end

	if GetGearType(Gear) == gtGrenade then

		GrenadeThrown = true

		GrenadeTimer = 0

	end

	if GetGearType(Gear) == gtShell then

		BazookasLeft = BazookasLeft - 1

	end

	if GetGearType(Gear) == gtFlame or GetGearType(Gear) == gtGrenade or GetGearType(Gear) == gtShell then

		trackGear(Gear)

	end

end

function onGearDelete(Gear)

	if GetGearType(Player) ~= nil and (GetGearType(Gear) == gtTarget or GetGearType(Gear) == gtCase) then

		for i=1, #TargetGears do

			if Gear == TargetGears[i] then

				TargetGears[i] = nil

				TargetsRemaining = TargetsRemaining - 1

			end

		end

		if TargetsRemaining <= 0 then

			if TargetNumber == BoomTarget or not HasHedgehogLandedYet() then

				if SaucerGear then

					AddCaption(loc("Objective completed! Now land safely."), capcolDefault, capgrpMessage2)

				end

				Check = true

				CheckTimer = 500

			else

				AutoSpawn()

			end

		end

	end

	if GetGearType(Gear) == gtGrenade then

		GrenadeTimer = 0

		GrenadeExploded = true

	end

	if GetGearType(Gear) == gtJetpack then

		SaucerGear = nil

		if TargetNumber == BoomTarget then

			AddAmmo(Player, amGrenade, 0)

		end

		if TargetNumber == LaunchTarget or TargetNumber == UnderwaterAttackTarget then

			AddAmmo(Player, amBazooka, 0)

		end

	end

	-- Fake crate collected

	if GetGearType(Gear) == gtCase and band(GetGearMessage(Gear), gmDestroy) ~= 0 and band(GetGearPos(Gear), 0x8) ~= 0 then

		PlaySound(sndShotgunReload)

	end

	if Gear == Barrels[1] then

		Barrels[1] = nil

	end

	if Gear == Barrels[2] then

		Barrels[2] = nil

		AddCaption(loc("Kaboom!"), capcolDefault, capgrpMessage)

	end

end