extends VBoxContainer

const Style := preload("res://scripts/ui/ui_style.gd")

var main: Control
var zone_list: GridContainer

func _ready() -> void:
	set_anchors_preset(Control.PRESET_FULL_RECT)
	add_theme_constant_override("separation", 14)

	var title := Label.new()
	title.text = "Study Map"
	Style.set_label(title, 34, Style.TEXT)
	add_child(title)

	var help := Label.new()
	help.text = "Choose a system zone. Strong scores unlock momentum badges and level progress."
	help.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
	Style.set_label(help, 16, Style.MUTED)
	add_child(help)

	zone_list = GridContainer.new()
	zone_list.columns = 3
	zone_list.size_flags_vertical = Control.SIZE_EXPAND_FILL
	add_child(zone_list)


func on_show(_payload: Variant = null) -> void:
	for child in zone_list.get_children():
		child.queue_free()

	var systems: Array[String] = ["All Systems"]
	systems.append_array(QuestionBankService.get_systems())
	var stats: Dictionary = ProfileService.get_profile().get("system_stats", {})

	for system_name in systems:
		var button := Button.new()
		button.custom_minimum_size = Vector2(260, 110)
		button.text = _zone_text(system_name, stats)
		Style.style_chip(button, Style.CYAN if system_name == "All Systems" else Style.MAGENTA)
		button.pressed.connect(func(zone_name: String = system_name): main.show_screen("setup", zone_name))
		zone_list.add_child(button)


func _zone_text(system_name: String, stats: Dictionary) -> String:
	if system_name == "All Systems" or not stats.has(system_name):
		return "%s\nStart block" % system_name
	var seen := int(stats[system_name].get("seen", 0))
	var correct := int(stats[system_name].get("correct", 0))
	var accuracy := 0
	if seen > 0:
		accuracy = int(round(float(correct) / float(seen) * 100.0))
	return "%s\n%d seen | %d%%" % [system_name, seen, accuracy]