extends PanelContainer

#var area_dict = {
#    "dropzone_content": [],
#    "cards": [],
#    "post_its_in_list": [],
#    "post_it_panels": []
#}
enum {DROPZONE, POST_IT_LIST, DRAGGING, ASSIGN_POST_IT}

var has_stage = false:
    set(focus):
        if focus:
            has_stage = true
            self.mouse_filter = Control.MOUSE_FILTER_PASS
            get_tree().call_group("interactables", "collapse")
        else:
            has_stage = false
            self.mouse_filter = Control.MOUSE_FILTER_IGNORE
        if is_node_ready():
            if focus:
                process_mode = Node.PROCESS_MODE_INHERIT
            else:
                process_mode = Node.PROCESS_MODE_DISABLED
        visible = has_stage

@onready var dropzone = $HBoxContainer/dropzone
var dropzone_size: Vector2
@export var dropzone_padding = 100
@onready var postit_container = $HBoxContainer/ScrollContainer/VBoxContainer
@onready var board_of_devs = $"board of devs"
var base_postit_panel: Panel
@onready var current_context:int = DROPZONE:
    set(context):
        match context:
            DROPZONE:
                pass
            POST_IT_LIST:
                pass
            DRAGGING:
                pass
            ASSIGN_POST_IT:
                pass
@onready var instructions = $instructions_panel/HBoxContainer/cards_remaining

var mementos_collected: int = 0:
    set(mementos):
        mementos_collected = mementos
        match mementos:
            1:
                instructions.text = "There are three Mementos left to find."
            2:
                instructions.text = "You have collected half of the mementos."
            3:
                instructions.text = "Find the last Memento to complete the Board."
            4:
                instructions.text = "Combine cards to order your thoughts."

var currently_active_node: Area2D = null

@onready var current_dropzone_id: int = 0:
    set(new_id):
        if new_id > dropzone.get_child_count() - 1: current_dropzone_id = 0
        elif new_id < 0: current_dropzone_id = dropzone.get_child_count() - 1
        else: current_dropzone_id = new_id
        
var current_postIt_id: int = 0:
    set(new_id):
        if new_id > postit_container.get_child_count() - 1: current_postIt_id = 0
        elif new_id < 0: current_postIt_id = postit_container.get_child_count() - 1
        else: current_postIt_id = new_id

var cache: Array = []

signal board_completed

# Called when the node enters the scene tree for the first time.
func _ready():
    base_postit_panel = $HBoxContainer/ScrollContainer/VBoxContainer/Panel    
    postit_container.remove_child(base_postit_panel)
    
    dropzone_size = get_viewport_rect().size - Vector2(dropzone_padding + base_postit_panel.custom_minimum_size.x, dropzone_padding)
    
    if get_parent() == get_tree().root:
        populate_board(["c_void", 'c_joy', "p_wet", "p_thomas"])
        populate_board(["c_fighting", 'c_hit', "p_girly", "p_vent"])

    has_stage = has_stage

func _process(delta):
    # drops dragged area when Mouse is no longer pressed.
    if has_stage and !Input.is_mouse_button_pressed(MOUSE_BUTTON_LEFT) and current_context == DRAGGING:
        currently_active_node.is_dragged = false

# Will be used later to spawn Cards and Post-Its and remember them in the dictionary 
func populate_board(card_names: Array):
    mementos_collected += 1
    
    var all_new:Dictionary = board_of_devs.get_cards_by_name_array(card_names)
    
    var new_cards:Array = all_new["cards"]
    var new_postits:Array = all_new["postIts"]
    
    # spawning the cards and adding them to the dictionary
    for new_card in all_new["cards"]:
        new_card.position = Vector2(randi_range(dropzone_padding, dropzone_size.x), randi_range(dropzone_padding, dropzone_size.y))
        insert_area(dropzone, new_card)
        new_card.set_owner(self)
        new_card.is_dragable = true
    for new_postit in all_new["postIts"]:   # spawning a post-it
        var new_panel = base_postit_panel.duplicate()
        postit_container.add_child(new_panel)
        new_panel.set_owner(self)
        new_panel.add_child(new_postit)
        new_postit.set_owner(self)
        new_postit.position = new_panel.get_child(0).position
        new_postit.is_dragable = true
    
    #currently_active_node = area_dict["dropzone_content"][0]  # set first Card as currently selected node by default
    currently_active_node = dropzone.get_child(0)
    
# Checks if a Node is currently inside the dropzone
func is_in_dropzone(to_check: Node) -> bool:
    return dropzone.get_rect().has_point(to_check.global_position)

# called if a mouse button is pressed
func handle_mouse_button(to_handle: Area2D, input: InputEvent):
    
    # No two areas can be dragged at the same time.
    # Make sure that only the same area is dragged.
    # Otherwise overlapping areas are dragged at the same time. 
    if current_context == DRAGGING:
        return
    
    currently_active_node = to_handle  # update currently selected
    to_handle.is_dragged = input.pressed
    if input.pressed:
        current_context = DRAGGING
    
    # Check what is being dragged
    if to_handle is Card:
        current_context = DROPZONE
        if !input.is_pressed():
            insert_area(dropzone, to_handle)
            current_context = DROPZONE
    elif to_handle is PostIt:
        if input.is_action_pressed("mouse_left"):
            to_handle.reparent(dropzone)
            to_handle.on_board = true
            to_handle.set_owner(self)   # needs to be here otherwise the owner disappears
            if input.is_action_pressed("mouse_right"):
                _return_postits_to_panels()
        else:
            if is_in_dropzone(to_handle):
                if to_handle.has_overlapping_areas():
                    for area in to_handle.get_overlapping_areas():
                        if area is Card:
                            if area.has_postit_attached():
                                area.exchange_postIt_with(to_handle).reparent(dropzone)
                else:
                    to_handle.rotation = to_handle.base_rotation
                    to_handle.scale = to_handle.base_scale
            else:
                current_context = POST_IT_LIST
                _return_postits_to_panels()

func _return_postits_to_panels():
    for panel in postit_container.get_children():
        panel.reclaim_postit()
    
func is_board_complete() -> bool:
    if mementos_collected == 4:
        for card in dropzone.get_children():
            if card is Card:
                if not card.has_postit_attached():
                    return false
        return true
    return false

func is_board_lore() -> bool:
    for card in dropzone.get_children():
        if card.has_postit_attached():
            if not card.current_post_it.is_in_group(card.name): return false
    return true
        
# Mark area that was hovered over as currently selected
func handle_hover(to_handle: Area2D):
    if to_handle != currently_active_node:
        currently_active_node.highlighted = false
    currently_active_node = to_handle
    
    if is_in_dropzone(to_handle):
        if to_handle is Card or (to_handle is PostIt and to_handle.on_board):
            current_dropzone_id = dropzone.get_children().find(to_handle)
        current_context = DROPZONE
    else:
        current_postIt_id = postit_container.get_children().find(to_handle.attatched_to)
        current_context = POST_IT_LIST
        
# Adds a child at the correct child indext in an area
func insert_area(parent: Control, node: Area2D):
    var children = parent.get_children()    
    var i = 0
    
    if children != []: while children[i].global_position.y > node.global_position.y: i+=1
    
    if not node in get_children(): node.reparent(parent)
    parent.move_child(node, i)
    
# Takes the inputs for control inputs
func _input(event):
    
    if event.is_action_pressed("ui_cancel"):
        State.leave_stage(self)
    
    # Return, if the input is a mouse event (mouse events are handled separately)
    if event is InputEventMouse or !has_stage or not is_instance_valid(currently_active_node): return
    
    if event.is_action_pressed("ui_up"):            # up to select an element above
        if current_context == POST_IT_LIST:
            current_postIt_id -= 1
        else:
            current_dropzone_id -= 1
                
    elif event.is_action_pressed("ui_down"):       # down to select an element beneath
        if current_context == POST_IT_LIST:
            current_postIt_id += 1
        else:
            current_dropzone_id += 1
                
    elif event.is_action_pressed("ui_left"):        # left to switch context to the left
        if current_context == POST_IT_LIST:
            current_context = DROPZONE
            
    elif event.is_action_pressed("ui_right"):       # right to switch context to the right
        current_context = POST_IT_LIST
            
    elif event.is_action_pressed("ui_accept"):              # select the selected post it
        var card:Card = dropzone.get_child(current_dropzone_id)
        if current_context == ASSIGN_POST_IT:     # to assign it to a card
            if card.has_postit_attached():
                currently_active_node = card.exchange_postIt_with(currently_active_node)
            else:
                card.attach_postit(currently_active_node)     
                current_context = DROPZONE
        else:
            if card.has_postit_attached():
                currently_active_node = card.remove_postIt()
                current_context == ASSIGN_POST_IT

# move the post it so it floats next to the card where it should be attached
func _select_card_for_assigning(post_it: Area2D, card: Area2D):
    post_it.tween_transform_to(card.get_child(3).global_position)

func on_scene_skipped(i: int):
    mementos_collected += i

func claim_focus():
    State.pass_stage_to(self)