extends Control

@onready var net: Node = get_node_or_null("/root/NetAPI")

var status_label: Label
var list_box: VBoxContainer

func _ready() -> void:
	_build_ui()
	_load_scores()

func _build_ui() -> void:
	# background
	anchor_left = 0
	anchor_top = 0
	anchor_right = 1
	anchor_bottom = 1
	offset_left = 0
	offset_top = 0
	offset_right = 0
	offset_bottom = 0

	# Margin
	var margin := MarginContainer.new()
	margin.anchor_right = 1
	margin.anchor_bottom = 1
	margin.offset_left = 32
	margin.offset_top = 32
	margin.offset_right = -32
	margin.offset_bottom = -32
	add_child(margin)

	# Panel
	var panel := PanelContainer.new()
	panel.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	panel.size_flags_vertical = Control.SIZE_EXPAND_FILL
	margin.add_child(panel)

	# Root VBox
	var root := VBoxContainer.new()
	root.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	root.size_flags_vertical = Control.SIZE_EXPAND_FILL
	root.add_theme_constant_override("separation", 14)
	panel.add_child(root)

	# Title
	var title := Label.new()
	title.text = "Leaderboard"
	title.add_theme_font_size_override("font_size", 44)
	title.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	root.add_child(title)

	# Status
	status_label = Label.new()
	status_label.text = "Loading..."
	status_label.add_theme_font_size_override("font_size", 18)
	status_label.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	root.add_child(status_label)

	# Scroll
	var scroll := ScrollContainer.new()
	scroll.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	scroll.size_flags_vertical = Control.SIZE_EXPAND_FILL
	root.add_child(scroll)

	# List VBox inside scroll
	list_box = VBoxContainer.new()
	list_box.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	list_box.size_flags_vertical = Control.SIZE_EXPAND_FILL
	list_box.add_theme_constant_override("separation", 6)
	scroll.add_child(list_box)

	# Footer with back button
	var footer := HBoxContainer.new()
	footer.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	root.add_child(footer)

	footer.add_spacer(true)

	var back := Button.new()
	back.text = "Back"
	back.pressed.connect(func(): get_tree().change_scene_to_file("res://scenes/MainMenu.tscn"))
	footer.add_child(back)

	footer.add_spacer(true)

func _clear_list() -> void:
	for c in list_box.get_children():
		c.queue_free()

func _load_scores() -> void:
	if net == null:
		status_label.text = "NetAPI nav atrasts (/root/NetAPI)."
		return

	# get_scores ir async (atgriež GDScriptFunctionState), tāpēc obligāti await
	_fetch_scores()

func _fetch_scores() -> void:
	# palaid asynchroni bez bloķēšanas
	call_deferred("_fetch_scores_deferred")

func _fetch_scores_deferred() -> void:
	var resp = await net.call("get_scores", 50)

	if resp == null:
		status_label.text = "No response."
		return
	if resp is Dictionary and resp.get("ok", false) == false:
		status_label.text = str(resp.get("error", "Failed"))
		return

	var arr: Array = []
	if resp is Dictionary:
		arr = resp.get("scores", [])

	if arr.is_empty():
		status_label.text = "No scores yet."
		_clear_list()
		return

	status_label.text = ""
	_render_table(arr)

func _render_table(arr: Array) -> void:
	_clear_list()

	# Header row
	list_box.add_child(_make_row("#", "USERNAME", "LVL", "SCORE", "TIME", "RESULT", true))

	var idx := 1
	for r in arr:
		if typeof(r) != TYPE_DICTIONARY:
			continue

		var username := str(r.get("username", "guest"))
		var level := str(int(r.get("level", 1)))
		var score := str(int(r.get("score", 0)))
		var time_sec := str(int(r.get("match_time_sec", r.get("match_time", 0))))
		var result := str(r.get("result", ""))

		list_box.add_child(_make_row(str(idx), username, level, score, time_sec + "s", result, false))
		idx += 1

func _make_row(a: String, b: String, c: String, d: String, e: String, f: String, header: bool) -> Control:
	var row := HBoxContainer.new()
	row.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	row.add_theme_constant_override("separation", 10)

	# "table" columns with fixed-ish widths
	row.add_child(_cell(a, 40, header))
	row.add_child(_cell(b, 260, header))
	row.add_child(_cell(c, 60, header))
	row.add_child(_cell(d, 90, header))
	row.add_child(_cell(e, 70, header))
	row.add_child(_cell(f, 90, header))

	return row

func _cell(text: String, width: int, header: bool) -> Control:
	var l := Label.new()
	l.text = text
	l.clip_text = true
	l.custom_minimum_size = Vector2(width, 0)
	l.size_flags_horizontal = Control.SIZE_FILL
	l.size_flags_vertical = Control.SIZE_FILL
	l.vertical_alignment = VERTICAL_ALIGNMENT_CENTER

	if header:
		l.add_theme_font_size_override("font_size", 18)
	else:
		l.add_theme_font_size_override("font_size", 16)

	return l