extends Node

# GoalsCycleManager - Handles 60-second goal cycles, scoring, and goal regeneration

const CYCLE_DURATION: float = 60.0
const BASE_SCORE: int = 100
const TIME_BONUS_MULTIPLIER: float = 2.0

# Timer state
var current_cycle_timer: float = 0.0
var is_cycle_active: bool = false

# Score tracking: peer_id -> score
var player_scores: Dictionary = {}

# Reference to main scene
var main_scene: Node = null

signal cycle_started()
signal cycle_ended()
signal timer_updated(time_remaining: float)
signal score_updated(peer_id: int, new_score: int)
signal leaderboard_updated(sorted_scores: Array)

func _ready():
	set_process(false)

func initialize(main: Node):
	main_scene = main

func _process(delta):
	if not is_cycle_active:
		return
	
	current_cycle_timer -= delta
	
	if current_cycle_timer <= 0:
		current_cycle_timer = 0
		_on_cycle_end()
	else:
		emit_signal("timer_updated", current_cycle_timer)
		
		# Server broadcasts timer sync every second
		if multiplayer.is_server() and int(current_cycle_timer) != int(current_cycle_timer + delta):
			rpc("sync_timer", current_cycle_timer)

# =============================================================================
# Cycle Control
# =============================================================================

func start_cycle():
	current_cycle_timer = CYCLE_DURATION
	is_cycle_active = true
	set_process(true)
	emit_signal("cycle_started")
	
	if multiplayer.is_server():
		rpc("sync_cycle_start")

@rpc("authority", "call_local", "reliable")
func sync_cycle_start():
	current_cycle_timer = CYCLE_DURATION
	is_cycle_active = true
	set_process(true)
	emit_signal("cycle_started")

@rpc("authority", "call_local", "unreliable")
func sync_timer(time_remaining: float):
	current_cycle_timer = time_remaining
	emit_signal("timer_updated", current_cycle_timer)

func _on_cycle_end():
	is_cycle_active = false
	set_process(false)
	emit_signal("cycle_ended")
	
	if multiplayer.is_server():
		# Clear all playerboards and convert matches to score
		_process_cycle_end_for_all_players()
		rpc("sync_cycle_end")
		
		# Start new cycle after a brief delay
		await get_tree().create_timer(2.0).timeout
		start_cycle()

@rpc("authority", "call_local", "reliable")
func sync_cycle_end():
	is_cycle_active = false
	set_process(false)
	emit_signal("cycle_ended")

# =============================================================================
# Goal Completion & Scoring
# =============================================================================

func on_goal_completed(player: Node, time_remaining: float):
	"""Called when a player completes their goal pattern."""
	if not multiplayer.is_server():
		return
	
	var peer_id = player.get_multiplayer_authority()
	
	# Calculate score: base + time bonus
	var time_bonus = int(time_remaining * TIME_BONUS_MULTIPLIER)
	var score_earned = BASE_SCORE + time_bonus
	
	# Update player score
	if not player_scores.has(peer_id):
		player_scores[peer_id] = 0
	player_scores[peer_id] += score_earned
	
	emit_signal("score_updated", peer_id, player_scores[peer_id])
	_update_leaderboard()
	
	# Sync score to all clients
	rpc("sync_player_score", peer_id, player_scores[peer_id])
	
	# Regenerate goals for this player
	regenerate_goals_for_player(player)
	
	# Randomize 9 tiles around player
	_randomize_tiles_around_player(player)
	
	print("[GoalsCycle] Player %d completed goal! +%d points (base: %d, time bonus: %d)" % [peer_id, score_earned, BASE_SCORE, time_bonus])

@rpc("authority", "call_local", "reliable")
func sync_player_score(peer_id: int, total_score: int):
	player_scores[peer_id] = total_score
	emit_signal("score_updated", peer_id, total_score)
	_update_leaderboard()

func _update_leaderboard():
	# Sort players by score (descending)
	var sorted_scores = []
	for peer_id in player_scores.keys():
		sorted_scores.append({"peer_id": peer_id, "score": player_scores[peer_id]})
	
	sorted_scores.sort_custom(func(a, b): return a.score > b.score)
	emit_signal("leaderboard_updated", sorted_scores)

# =============================================================================
# Cycle End Processing
# =============================================================================

func _process_cycle_end_for_all_players():
	"""Server-side: Clear playerboards and convert matching tiles to score."""
	var all_players = get_tree().get_nodes_in_group("Players")
	
	for player in all_players:
		var peer_id = player.get_multiplayer_authority()
		var match_score = _calculate_match_score(player)
		
		if match_score > 0:
			if not player_scores.has(peer_id):
				player_scores[peer_id] = 0
			player_scores[peer_id] += match_score
			rpc("sync_player_score", peer_id, player_scores[peer_id])
		
		# Clear playerboard
		player.playerboard.fill(-1)
		player.rpc("sync_playerboard", player.playerboard)
		
		# Generate new goals
		regenerate_goals_for_player(player)
	
	_update_leaderboard()

func _calculate_match_score(player: Node) -> int:
	"""Calculate score from matching tiles in playerboard to goals."""
	var matching_tiles = 0
	var goals = player.goals
	var playerboard = player.playerboard
	
	# Check center 3x3 of playerboard against goals
	for i in range(3):
		for j in range(3):
			var goal_idx = i * 3 + j
			var board_idx = (i + 1) * 5 + (j + 1) # Center 3x3 in 5x5 board
			
			if goal_idx < goals.size() and board_idx < playerboard.size():
				if goals[goal_idx] != -1 and playerboard[board_idx] == goals[goal_idx]:
					matching_tiles += 1
	
	# 10 points per matching tile
	return matching_tiles * 10

# =============================================================================
# Goal Regeneration
# =============================================================================

func regenerate_goals_for_player(player: Node):
	"""Generate new random goals for a player."""
	if not multiplayer.is_server():
		return
	
	var new_goals = GoalManager.initialize_random_goals(9, 7, 10, 1.0)
	var int_goals: Array[int] = []
	for g in new_goals:
		int_goals.append(g)
	
	player.goals = int_goals
	player.rpc("sync_goals", int_goals)

# =============================================================================
# Tile Randomization
# =============================================================================

func _randomize_tiles_around_player(player: Node):
	"""Randomize 9 tiles in 3x3 area around player position."""
	if not main_scene:
		return
	
	var enhanced_gridmap = main_scene.get_node_or_null("EnhancedGridMap")
	if not enhanced_gridmap:
		return
	
	var center = player.current_position
	var rng = RandomNumberGenerator.new()
	rng.randomize()
	
	# 3x3 area around player
	for dx in range(-1, 2):
		for dz in range(-1, 2):
			var pos = Vector2i(center.x + dx, center.y + dz)
			var cell = Vector3i(pos.x, 1, pos.y)
			
			# Check if position is valid
			if not enhanced_gridmap.is_position_valid(pos):
				continue
			
			# Check if there are tiles nearby or if empty
			var current_item = enhanced_gridmap.get_cell_item(cell)
			
			# Decide: delete, spawn, or randomize
			var action = rng.randi() % 3
			
			match action:
				0: # Delete tile
					if current_item != -1:
						main_scene.rpc("sync_grid_item", cell.x, cell.y, cell.z, -1)
				1: # Spawn new tile
					if current_item == -1:
						var new_tile = rng.randi_range(7, 10)
						main_scene.rpc("sync_grid_item", cell.x, cell.y, cell.z, new_tile)
				2: # Randomize existing
					if current_item != -1:
						var new_tile = rng.randi_range(7, 10)
						while new_tile == current_item:
							new_tile = rng.randi_range(7, 10)
						main_scene.rpc("sync_grid_item", cell.x, cell.y, cell.z, new_tile)

# =============================================================================
# Score Getters
# =============================================================================

func get_player_score(peer_id: int) -> int:
	return player_scores.get(peer_id, 0)

func get_leaderboard() -> Array:
	var sorted_scores = []
	for peer_id in player_scores.keys():
		sorted_scores.append({"peer_id": peer_id, "score": player_scores[peer_id]})
	sorted_scores.sort_custom(func(a, b): return a.score > b.score)
	return sorted_scores

func get_time_remaining() -> float:
	return current_cycle_timer

func reset_scores():
	player_scores.clear()
	_update_leaderboard()