extends Panel
class_name CardSlot

signal card_selected(card_slot, card)

var current_card = null
var dragging = false
var drag_offset = Vector2()

@onready var card_name_label = $CardNameLabel
@onready var card_rank_label = $RankLabel
@onready var card_border = $CardBorder
@onready var card_bg = $CardBackground

# Card rank colors
var rank_colors = {
    Card.Rank.RANK_0: Color(0.9, 0.1, 0.1, 1.0),  # Red
    Card.Rank.RANK_1: Color(0.9, 0.6, 0.1, 1.0),  # Orange
    Card.Rank.RANK_2: Color(0.1, 0.7, 0.1, 1.0),  # Green
    Card.Rank.RANK_3: Color(0.1, 0.7, 0.9, 1.0)   # Blue
}

func _ready():
    # Set up card appearance
    update_appearance()
    
    # Connect signals for interaction
    mouse_filter = Control.MOUSE_FILTER_STOP
    gui_input.connect(_on_gui_input)

func set_card(card):
    current_card = card
    update_appearance()

func clear():
    current_card = null
    update_appearance()

func has_card():
    return current_card != null

func update_appearance():
    if current_card:
        # Show card details
        card_name_label.text = current_card.cardName
        card_name_label.visible = true
        
        # Set rank display
        card_rank_label.text = str(current_card.rank)
        card_rank_label.visible = true
        
        # Set color based on rank
        if current_card.rank in rank_colors:
            card_rank_label.add_theme_color_override("font_color", rank_colors[current_card.rank])
            card_border.modulate = rank_colors[current_card.rank]
        
        # Show card background
        card_bg.modulate = Color(0.2, 0.2, 0.25, 1.0)
    else:
        # Empty slot
        card_name_label.visible = false
        card_rank_label.visible = false
        card_border.modulate = Color(0.4, 0.4, 0.4, 0.5)
        card_bg.modulate = Color(0.15, 0.15, 0.15, 0.8)

func _on_gui_input(event):
    if event is InputEventMouseButton:
        if event.button_index == MOUSE_BUTTON_LEFT:
            if event.pressed:
                # Start drag
                if current_card:
                    dragging = true
                    drag_offset = get_global_mouse_position() - global_position
            else:
                # End drag
                if dragging:
                    dragging = false
                    emit_signal("card_selected", self, current_card)
                elif current_card:
                    # Just a click, still select the card
                    emit_signal("card_selected", self, current_card)

func _process(delta):
    if dragging:
        # Update position while dragging
        global_position = get_global_mouse_position() - drag_offset