extends Resource
const EQUIPMENT := preload("res://scripts/planets/captain_equipment.gd")
const PROFILES := preload("res://scripts/planets/planet_profiles.gd")
@export var lander_hp := 100.0
@export var visits: Dictionary = {}
@export var scans: Dictionary = {}
@export var delivered_modules: Array[Resource] = []
@export var research_records: Dictionary = {}
var active := false
var cargo: Dictionary = {}
var cargo_modules: Array[Resource] = []
var cargo_records: Dictionary = {}
var active_profile: Dictionary = {}
var visit_seed := 0
var last_result: Dictionary = {}

func repair_cost() -> int:
	return maxi(0, ceili(100.0 - lander_hp - 0.00001))

func repair(captain: Resource) -> bool:
	var cost := repair_cost()
	if active or captain.parts < cost:
		return false
	captain.parts -= cost
	lander_hp = 100
	captain.emit_changed()
	return true

func scan(profile: Dictionary) -> void:
	scans[str(profile.id)] = profile.duplicate(true)
	emit_changed()

func begin_visit(profile: Dictionary) -> bool:
	if active or repair_cost() > 0:
		return false
	active_profile = profile.duplicate(true)
	var count := int(visits.get(profile.id, 0)) + 1
	visits[profile.id] = count
	visit_seed = int(profile.seed) ^ (count * 7919)
	cargo.clear()
	cargo_modules.clear()
	cargo_records.clear()
	active = true
	lander_hp = maxf(0, lander_hp - float(profile.landing_damage))
	last_result.clear()
	return true

func damage(amount: float) -> void:
	if active:
		lander_hp = clampf(lander_hp - maxf(0, amount), 0, 100)
		emit_changed()

func add_material(key: String, amount: int) -> void:
	if active and amount > 0:
		cargo[key] = int(cargo.get(key, 0)) + amount
		emit_changed()

func resolve_poi(captain: Resource, poi: Dictionary, rng: RandomNumberGenerator) -> Dictionary:
	if not active or bool(poi.get("complete", false)):
		return {}
	var stage := int(poi.get("stage", 0))
	var chance := PROFILES.success_chance(active_profile, captain, stage)
	var success := rng.randf() < chance
	var result := {"success": success, "chance": chance, "damage": 0, "materials": {}, "module": null}
	if success:
		var difficulty := float(active_profile.difficulty)
		var multiplier := (1.0 + difficulty * 2.0) * (1.0 + stage * 0.65)
		var ordinary: Array = ["iron", "titanium", "aluminium", "uranium", "sulfur"]
		var pool: Array = PROFILES.MATERIALS if rng.randf() < 0.55 else ordinary
		var key: String = pool[rng.randi_range(0, pool.size() - 1)]
		var amount := maxi(1, roundi(rng.randi_range(5, 12) * multiplier))
		add_material(key, amount)
		result.materials[key] = amount
		if rng.randf() < 0.15 + difficulty * 0.25:
			var generator := preload("res://scripts/items/item_generator.gd")
			var definitions: Array = generator.DEFINITIONS.filter(func(d): return d.category != ItemDefinition.Category.WEAPON)
			var level := mini(1000, GameState.system_level + roundi(difficulty * 6.0) + stage)
			var item: ItemInstance = generator.generate_loot(level, 1 if difficulty > 0.5 or stage >= 2 else 0, definitions[rng.randi_range(0, definitions.size() - 1)])
			cargo_modules.append(item)
			result.module = item
		if str(poi.kind) == "ruins":
			var record := "Archiwum %s" % str(active_profile.name)
			cargo_records[record] = int(cargo_records.get(record, 0)) + 1
		poi.stage = stage + 1
		if int(poi.stage) >= 3:
			poi.complete = true
	else:
		var loss := rng.randi_range(8, 15) + stage * 5 + roundi(float(active_profile.difficulty) * 10)
		damage(loss)
		result.damage = loss
		# Failure closes this location; previously collected loot stays until return.
		poi.complete = true
	emit_changed()
	return result

func finish_visit(captain: Resource, success: bool) -> Dictionary:
	if not active:
		return last_result
	success = success and lander_hp > 0
	var result := {"success": success, "materials": cargo.duplicate(), "modules": cargo_modules.size(), "hp": lander_hp}
	if success:
		for key in cargo:
			captain.minerals[key] = int(captain.minerals.get(key, 0)) + int(cargo[key])
		delivered_modules.append_array(cargo_modules)
		for key in cargo_records:
			research_records[key] = int(research_records.get(key, 0)) + int(cargo_records[key])
	active = false
	cargo.clear()
	cargo_modules.clear()
	cargo_records.clear()
	active_profile.clear()
	last_result = result
	captain.emit_changed()
	emit_changed()
	return result

func deliver_modules(inventory: Node) -> int:
	var delivered := 0
	for index in range(delivered_modules.size() - 1, -1, -1):
		if inventory.add_item(delivered_modules[index]):
			delivered_modules.remove_at(index)
			delivered += 1
	emit_changed()
	return delivered

const ENGINEER_PRICE := 100
const ENGINEER_LEVEL_RATIO := 0.75

static func roll_engineer_bonus(rng: RandomNumberGenerator) -> int:
	var total := 0.0
	for bonus in 21:
		total += pow(ENGINEER_LEVEL_RATIO,bonus)
	var roll := rng.randf()*total
	for bonus in 21:
		roll -= pow(ENGINEER_LEVEL_RATIO,bonus)
		if roll < 0:
			return bonus
	return 20

func buy_engineer_offer(captain: Resource, event: Dictionary, rng: RandomNumberGenerator) -> Dictionary:
	if not active or lander_hp <= 0 or str(event.get("kind","")) != "engineer" or bool(event.get("complete",false)):
		return {"success":false,"reason":"Oferta jest już niedostępna."}
	if captain.credits < ENGINEER_PRICE:
		return {"success":false,"reason":"Potrzebujesz 100 kredytów."}
	var generator := preload("res://scripts/items/item_generator.gd")
	var categories := [ItemDefinition.Category.SHIELD,ItemDefinition.Category.ARMOR,ItemDefinition.Category.ENGINE,ItemDefinition.Category.REACTOR,ItemDefinition.Category.COMPUTER]
	var definitions: Array = generator.DEFINITIONS.filter(func(definition): return definition.category in categories)
	var level := mini(1000,GameState.system_level+roll_engineer_bonus(rng))
	# Generate the exact offered level; captain luck must not bypass the +20 limit.
	var item: ItemInstance = generator.generate_for_definition(definitions[rng.randi_range(0,definitions.size()-1)],level,0)
	captain.credits -= ENGINEER_PRICE
	cargo_modules.append(item)
	event.complete = true
	captain.emit_changed()
	emit_changed()
	return {"success":true,"item":item}