extends Node

const CAPTAIN_PROGRESS := preload("res://scripts/captain/captain_progress.gd")
var captain: CaptainProgress = CAPTAIN_PROGRESS.new()

var selected_ship_path: String = ""
var restart_inventory: Dictionary = {}
var system_level: int = 1
var system_seed: int = 0
var active_distant_map: Dictionary = {}
var distant_home: Dictionary = {}
var return_to_freighter := false
var distant_warp_arrival := false
var hull_bastion_used := false
var highest_system := 1
var system_seeds: Dictionary = {}
var cleared_systems: Dictionary = {}
var _production_signal_time := 0.0
var explored_pois: Dictionary = {}
var asteroid_retry_seeds: Dictionary = {}
var exploration_wreck_bonuses: Dictionary = {}
var hud_panel_state: Dictionary = {}
const SAVES := preload("res://scripts/game/save_service.gd")
var _autosave_time := 0.0
var last_save_error: Error = OK

func save_game() -> Error:
	last_save_error = SAVES.write(self, get_tree().current_scene)
	return last_save_error

func has_save() -> bool:
	return SAVES.available()

func continue_game() -> bool:
	return SAVES.restore_state(self)

func save_named_game(save_name: String, slot_id: String = "") -> Error:
	if save_name.strip_edges().is_empty(): return ERR_INVALID_PARAMETER
	last_save_error = SAVES.write(self, get_tree().current_scene, save_name, slot_id)
	return last_save_error

func load_game(slot_id: String) -> bool:
	return SAVES.restore_state(self, slot_id)

func depart_distant(map_id: String) -> bool:
	if not active_distant_map.is_empty() or not captain.expedition.distant_maps.has(map_id): return false
	var map: Dictionary = captain.expedition.distant_maps[map_id]
	var cost: int = preload("res://scripts/planets/distant_expeditions.gd").fuel_cost(map)
	if captain.expedition.deuter < cost: return false
	distant_home = {"level":system_level,"seed":system_seed,"hull_bastion_used":hull_bastion_used}
	hull_bastion_used = false
	active_distant_map = map.duplicate(true)
	captain.expedition.distant_maps.erase(map_id)
	captain.expedition.deuter -= cost
	system_level = int(map.level)
	system_seed = int(map.seed)
	captain.expedition.emit_changed()
	return true

func restore_distant_home() -> void:
	if distant_home.is_empty(): return
	system_level = int(distant_home.level)
	system_seed = int(distant_home.seed)
	hull_bastion_used = bool(distant_home.get("hull_bastion_used",false))
	active_distant_map.clear()
	distant_home.clear()
	distant_warp_arrival = false

func create_system_seed() -> int:
	var rng := RandomNumberGenerator.new()
	rng.randomize()
	return maxi(1, rng.randi())

func reset_current_system_exploration() -> void:
	# Keep the system and rewards, but regenerate asteroid placement and minerals.
	var previous: int = asteroid_retry_seeds.get(system_seed, system_seed)
	var next_seed := create_system_seed()
	while next_seed == previous:
		next_seed = create_system_seed()
	asteroid_retry_seeds[system_seed] = next_seed
	var prefix := "%d:" % system_seed
	for id in explored_pois.keys():
		if str(id).begins_with(prefix):
			explored_pois.erase(id)

func start_new_run() -> void:
	_autosave_time = 0.0
	hull_bastion_used = false
	captain = CAPTAIN_PROGRESS.new()
	system_level = 1
	highest_system = 1
	active_distant_map.clear()
	distant_home.clear()
	return_to_freighter = false
	distant_warp_arrival = false
	system_seeds.clear()
	cleared_systems.clear()
	_production_signal_time = 0
	system_seed = create_system_seed()
	restart_inventory.clear()
	explored_pois.clear()
	asteroid_retry_seeds.clear()
	exploration_wreck_bonuses.clear()
	hud_panel_state.clear()

func _ready() -> void:
	process_mode = Node.PROCESS_MODE_ALWAYS
	var game_window := get_tree().root
	game_window.content_scale_size = Vector2i(1280, 720)
	game_window.content_scale_mode = Window.CONTENT_SCALE_MODE_CANVAS_ITEMS
	game_window.content_scale_aspect = Window.CONTENT_SCALE_ASPECT_EXPAND

func remember_system() -> void:
	highest_system = maxi(highest_system, system_level)
	system_seeds[system_level] = system_seed

func can_visit_system(level: int) -> bool:
	return level >= 1 and level <= highest_system and level <= 120

func seed_for_system(level: int) -> int:
	if not system_seeds.has(level): system_seeds[level] = create_system_seed()
	return int(system_seeds[level])

func _process(delta: float) -> void:
	advance_play_time(delta, get_tree().current_scene)
	var scene := get_tree().current_scene
	if scene == null or not scene.has_node("PlayerShip"): return
	_autosave_time += delta
	if _autosave_time >= 60.0 and not captain.expedition.active:
		_autosave_time = 0.0
		save_game()

func advance_play_time(delta: float, scene: Node) -> void:
	if scene == null or not scene.has_node("PlayerShip"): return
	if bool(scene.get_node("PlayerShip").get("_is_destroyed")): return
	var expedition := scene.get_node_or_null("PlanetExpeditions")
	var location_open := expedition != null and is_instance_valid(expedition.screen)
	if get_tree().paused and not location_open: return
	var researching := preload("res://scripts/planets/laboratory.gd").advance(captain.expedition,delta)
	var alien_was_active: bool = not captain.expedition.alien_project.is_empty()
	researching = preload("res://scripts/planets/alien_research.gd").advance(captain.expedition,delta) or researching
	if alien_was_active and captain.expedition.alien_project.is_empty():
		captain.emit_changed()
		var inventory := scene.get_node_or_null("PlayerShip/ShipInventory")
		if inventory != null: inventory._recalculate_ship_stats()
	var network := preload("res://scripts/planets/mining_network.gd")
	if network.advance(captain.expedition, delta) <= 0 and not researching: return
	_production_signal_time += delta
	if _production_signal_time >= 1.0:
		_production_signal_time = fmod(_production_signal_time, 1.0)
		captain.expedition.emit_changed()