extends Node2D

const PLAYER := preload("res://scenes/game/player_ship.tscn")
const ENEMY := preload("res://scenes/game/enemy_ship.tscn")
const GENERATOR := preload("res://scripts/items/item_generator.gd")
const IDS := ["teleport", "cloak", "mine_layer", "flares", "solar_shield_charge"]
var ship: CharacterBody2D
var inventory: ShipInventory

func equip(id: String, slot: int) -> void:
	var item := GENERATOR.generate_for_definition(load("res://resources/items/%s.tres" % id), 1)
	assert(item.additional_modifiers.is_empty())
	assert(item.definition.icon != null)
	assert(inventory.add_item(item))
	assert(inventory.move_item("cargo", inventory.cargo.find(item), "extension", slot))

func _ready() -> void:
	GameState.start_new_run()
	ship = PLAYER.instantiate() as CharacterBody2D
	ship.name = "PlayerShip"
	add_child(ship)
	ship.set_physics_process(false)
	ship.get_node("WeaponController").set_physics_process(false)
	var systems := ship.get_node("ExtensionSystems")
	systems.set_physics_process(false)
	inventory = ship.get_node("ShipInventory") as ShipInventory
	inventory.unlocked_extension_slots = ShipInventory.EXTENSION_SLOT_COUNT # Full-loadout ability fixture.
	inventory.unlocked_weapon_slots = ShipInventory.WEAPON_SLOT_COUNT
	for index in IDS.size():
		equip(IDS[index], index)
	var enemy := ENEMY.instantiate() as CharacterBody2D
	enemy.position = Vector2(300, 0)
	add_child(enemy)
	enemy.set("_player", ship)
	enemy.set_physics_process(false)
	await get_tree().physics_frame
	await get_tree().process_frame
	# Teleport: partial energy is fully consumed; landing stays inside the playable area.
	var origin := ship.position
	ship.set("energy", 37.0)
	assert(ship.call("activate_ability", 0))
	assert(ship.position.distance_to(origin) >= 400.0)
	assert(absf(ship.position.x) <= 2440 and absf(ship.position.y) <= 1640)
	assert(ship.get("energy") == 0.0)
	assert(ship.call("get_ability_cooldown", 0) == 60.0)
	assert(not ship.call("activate_ability", 0))
	# Moving a module or equipping a duplicate cannot bypass its cooldown.
	assert(inventory.move_item("extension", 0, "extension", 1))
	assert(ship.call("get_ability_cooldown", 1) == 60.0)
	equip("teleport", 4)
	assert(ship.call("get_ability_cooldown", 4) == 60.0)
	assert(not ship.call("activate_ability", 4))
	equip("solar_shield_charge", 4)
	assert(inventory.move_item("extension", 1, "extension", 0))
	ship.position = origin
	enemy.position = origin + Vector2(300, 0)
	assert(enemy.call("select_combat_target") == ship)
	# Cloak removes targeting, lasts ten seconds and restores the original artwork.
	var original_material: Material = ship.get_node("Sprite2D").material
	assert(ship.call("activate_ability", 1))
	assert(ship.call("is_cloaked"))
	assert(enemy.call("select_combat_target") == null)
	assert(ship.get_node("Sprite2D").material != original_material)
	assert(not ship.call("activate_ability", 1))
	# Flares attract enemies even while the player is invisible, and expire in ten seconds.
	assert(ship.call("activate_ability", 3))
	assert(ship.call("get_ability_cooldown", 3) == 30.0)
	var flares := get_tree().get_nodes_in_group("player_flares")
	assert(flares.size() == 3)
	assert(flares.has(enemy.call("select_combat_target")))
	assert(not ship.call("activate_ability", 3))
	for flare in flares:
		flare.set_physics_process(false)
		flare.call("_physics_process", 10.0)
		assert(flare.is_queued_for_deletion())
	assert(enemy.call("select_combat_target") == null)
	systems.call("_physics_process", 9.9)
	assert(ship.call("is_cloaked"))
	systems.call("_physics_process", 0.11)
	assert(not ship.call("is_cloaked"))
	assert(ship.get_node("Sprite2D").material == original_material)
	assert(enemy.call("select_combat_target") == ship)
	assert(not ship.call("activate_ability", 1))
	# Mine: 5% maximum hull damage despite armor; slow lasts five seconds; one hit only.
	var weapons := ship.get_node("WeaponController")
	for weapon_id in ["plasma_cannon", "machine_gun", "gamma_cannon", "missile_launcher", "beam_laser"]:
		systems.get("cooldowns").clear()
		assert(ship.call("activate_ability", 1))
		var weapon := GENERATOR.generate_for_definition(load("res://resources/items/%s.tres" % weapon_id), 1)
		if weapon_id == "beam_laser":
			ship.set("energy", 0.0)
			weapons.call("_fire_laser", 0, weapon)
			assert(ship.call("is_cloaked"), "Failed shot must preserve cloak")
			ship.set("energy", ship.get("max_energy"))
			weapons.call("_fire_laser", 0, weapon)
		elif weapon_id == "missile_launcher":
			inventory.weapon_slots[2] = weapon
			inventory.missile_ammunition = 0
			assert(not weapons.call("try_fire_missile", 2))
			assert(ship.call("is_cloaked"), "Empty launcher must preserve cloak")
			inventory.missile_ammunition = 1
			assert(weapons.call("try_fire_missile", 2))
		else:
			weapons.call("_fire_projectile", weapon)
		assert(not ship.call("is_cloaked"), "Every fired weapon must break cloak")
		assert(ship.get_node("Sprite2D").material == original_material)
		assert(ship.call("get_ability_cooldown", 1) == 60.0)
		assert(enemy.call("select_combat_target") == ship)
	assert(ship.call("activate_ability", 2))
	var mine: Node2D = get_tree().get_nodes_in_group("player_mines")[0]
	mine.set_physics_process(false)
	enemy.position = mine.position
	enemy.set("shields", 0.0)
	enemy.set("absorption", Vector3(75, 0, 0))
	var maximum := float(enemy.get("max_hull"))
	mine.call("_physics_process", 0.8)
	assert(mine.is_queued_for_deletion())
	assert(is_equal_approx(float(enemy.get("hull")), maximum * 0.95))
	mine.call("_physics_process", 0.1)
	assert(is_equal_approx(float(enemy.get("hull")), maximum * 0.95))
	assert(enemy.call("get_slow_multiplier") == 0.5)
	enemy.set("_player", null)
	enemy.call("_physics_process", 5.1)
	assert(enemy.call("get_slow_multiplier") == 1.0)
	# Solar shields: blocked away from stars and at full shields; fills in five seconds.
	ship.set("shields", 0.0)
	assert(not ship.call("activate_ability", 4))
	var star := Node2D.new()
	star.position = ship.position
	add_child(star)
	ship.set("charging_star", star)
	assert(ship.call("activate_ability", 4))
	assert(ship.call("get_ability_cooldown", 4) == 30.0)
	systems.call("_physics_process", 2.5)
	assert(is_equal_approx(float(ship.get("shields")), float(ship.get("max_shields")) * 0.5))
	systems.call("_physics_process", 2.5)
	assert(is_equal_approx(float(ship.get("shields")), float(ship.get("max_shields"))))
	systems.get("cooldowns").clear()
	assert(not ship.call("activate_ability", 4))
	ship.set("shields", 0.0)
	assert(ship.call("activate_ability", 4))
	ship.position += Vector2(1000, 0)
	systems.call("_physics_process", 1.0)
	assert(ship.get("shields") == 0.0 and systems.get("solar_remaining") == 0.0)
	# Docking, defeat and pause prevent activation; expired cooldowns allow reuse.
	systems.call("_physics_process", 61.0)
	ship.set("is_docked", true)
	assert(not ship.call("activate_ability", 3))
	ship.set("is_docked", false)
	get_tree().paused = true
	assert(not ship.call("activate_ability", 3))
	get_tree().paused = false
	ship.set("_is_destroyed", true)
	assert(not ship.call("activate_ability", 3))
	ship.set("_is_destroyed", false)
	assert(ship.call("activate_ability", 3))
	inventory.preserve_for_restart()
	assert(not GameState.restart_inventory.has("extension_cooldowns"))
	var restored := PLAYER.instantiate() as CharacterBody2D
	add_child(restored)
	restored.set_physics_process(false)
	restored.get_node("WeaponController").set_physics_process(false)
	assert(restored.call("get_ability_cooldown", 3) == 0.0)
	assert(restored.call("activate_ability", 3))
	print("TACTICAL_EXTENSIONS_TEST: PASS (five modules, icons, loot, teleport safety/energy, cloak duration/AI/restoration, flares targeting/lifetime, mine damage/slow/single hit, solar recharge/range, shared cooldowns, pause/dock/defeat, cooldown reset on reload)")
	get_tree().quit()