extends Node2D

# word stuff
var word_set
var word_set_file_path
var word_set_file
var word_set_content
var word_set_array

# init random
var alphabet = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N",
"O","P","Q","R","S","T","U","V","W","X","Y","Z"]
var comets = []
var active

# display
var viewport_size
var scale_factor_x
var scale_factor_y

# difficulty
var max_delay = 2
var min_delay = .5
var delay = max_delay
var comet_speed = 250

# numbers
var spawn_timer = 0
var max_character_count = 0

# stats
var health = 100
var hit_count = 0.0
var miss_count = 0.0
var comets_processed = 0.0
var total_comets = 0.0

# ui init
var on_top
var hp_label
var acc_label
var miss_label
var damage_overlay

# objects
var comet_source = preload("res://scenes/objects/game/comet.tscn")
var fade
var pause_menu

# Runs on start
func _ready() -> void:
	# ready ui
	viewport_size = get_viewport_rect().size
	on_top = self.get_node("OnTop")

	hp_label = on_top.get_node("HUD").get_node("Stack").get_node("Health")
	acc_label = on_top.get_node("HUD").get_node("Stack").get_node("Accuracy")
	miss_label = on_top.get_node("HUD").get_node("Stack").get_node("MissCount")
	damage_overlay = on_top.get_node("Damage")
	
	active = true
	
	pause_menu = on_top.get_node("Pause")
	fade = on_top.get_node("Fade")
	fade.visible = true
	var tween := create_tween()
	tween.parallel().tween_property(fade, "modulate:a", 0, 1).set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_OUT)
	
	# Load Corresponding Text File
	word_set_file_path = "res://gameplay/word_sets/" + word_set + ".txt"
	word_set_file = FileAccess.open(word_set_file_path, FileAccess.READ)
	
	# Gets file contents as text
	word_set_content = word_set_file.get_as_text()
	
	# Splits text file contents by line and removes the first entry (its just the name)
	word_set_array = word_set_content.split("\n", true)
	word_set_array.remove_at(0)
	
	if word_set_array[len(word_set_array)-1] == "":
		word_set_array.remove_at(len(word_set_array)-1)
		
	for word in word_set_array:
		if len(word) > max_character_count:
			print("new longest word: " + str(word) + " " + str(len(word)))
			max_character_count = len(word)
	
	#print(word_set_array)

# Runs every frame
func _process(delta: float) -> void:
	if active:

		if health <= 0:
			game_over()

		spawn_timer += delta
		
		hp_label.text = "HP: " + str(health)
		miss_label.text = "X: " + str(miss_count)
		
		if spawn_timer >= delay:
			spawn_timer = 0
			spawn_word()

func calculate_accuracy():
	var accper = (hit_count)/(comets_processed)*100
	acc_label.text = "ACC: " + str(snapped(accper, .02)) + "%"

func spawn_word():
	var scan_commet = comet_source.instantiate()
	var comet_width = scan_commet.get_node("Sprite").sprite_frames.get_frame_texture("comet",0).get_width()
	var new_word = word_set_array[randi_range(0,len(word_set_array)-1)]
	var dist = (viewport_size.x - (2*comet_width))/(max_character_count-1)
	var offset = comet_width
	scan_commet.queue_free()
	
	for chara in new_word:
		if chara != " ":
			var new_commet = comet_source.instantiate()
			total_comets += 1
			new_commet.position = Vector2(offset,-128)
			new_commet.get_node("Sprite").get_node("Label").text = chara
			new_commet.speed = comet_speed
			add_child(new_commet)
			comets.append(new_commet)
		offset += dist
		
	delay = randf_range(min_delay,max_delay)
	
func miss(comet):
	$Miss.play()
	health -= comet.damage
	comets_processed += 1
	miss_count += 1.0
	calculate_accuracy()
	comets.erase(comet)
	comet.queue_free()

	var tween1 := create_tween()
	tween1.parallel().tween_property(damage_overlay, "modulate:a", .5, .125).set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_OUT)

	await tween1.finished

	var tween2 := create_tween()
	tween2.parallel().tween_property(damage_overlay, "modulate:a", 0, .125).set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_OUT)
	
func game_over():
	active = false
	$BackgroundMusic.stop()
	on_top.get_node("GameOver").visible = true
	$Lose.play()
	await $Lose.finished
	$Sad.play()

func _input(event):
	if event is InputEventKey and event.pressed:
		if event.as_text() in alphabet:
			if active:
				if len(comets) > 0:
					var comet = comets[0]
					if event.as_text() == comet.get_node("Sprite").get_node("Label").text:
						comets.erase(comet)
						comets_processed += 1
						hit_count += 1
						calculate_accuracy()
						comet.self_active = false
						var laser = Line2D.new()
						laser.default_color = Color.RED
						laser.points = PackedVector2Array([$Tux.position,comet.position])
						add_child(laser)
						comet.get_node("Sprite").play("cometbreak")
						$CometBreakSound.play()
						await comet.get_node("Sprite").animation_finished
						laser.queue_free()
						comet.queue_free()
		elif event.keycode == KEY_ESCAPE:
			if pause_menu.visible:
				pause_menu.resume()
				$BackgroundMusic.play()
			else:
				$Back.play()
				active = false
				pause_menu.visible = true
				$BackgroundMusic.stop()