I hate my code, but buy/sell is done

scripts/Base/Menu/buy_sell.gd

@@ -45,6 +45,7 @@ func get_buy_sell_list(buy: bool) -> String:
 		total += item_description(buy, item) + "\n"
 	return total
 
+## Returns amount of items in buy/sell list
 func get_buy_sell_len(buy: bool) -> int:
 	var list = items_on_buy if buy else items_on_sell
 	return len(list)

scripts/Base/Menu/buy_sell_button.gd

@@ -0,0 +1,41 @@
+extends MessageSenderAction
+
+## How many items will be bought/sold
+var amount: int
+## How much money will be received/spent
+var total_cost: float
+## Item name which will be added to cargo
+var item_name: String
+
+var buy: bool
+
+@onready var player_ship: PlayerShip = get_tree().current_scene.player_ship
+
+func _ready():
+	amount = format["amount"]
+	total_cost = format["total_cost"]
+	item_name = format["item_name"]
+	buy = format["buy"]
+	if amount < 1:
+		disabled = true
+	elif !buy and player_ship.money < total_cost:
+		disabled = true
+	elif buy and item_name in player_ship.cargo:
+		if player_ship.cargo[item_name] < amount:
+			disabled = true
+	elif buy and !(item_name in player_ship.cargo):
+		disabled = true
+	super._ready()
+
+func action():
+	get_parent().buy_sell_amount = amount
+	if !buy and player_ship.money >= total_cost:
+		player_ship.money -= total_cost
+		if item_name in player_ship.cargo:
+			player_ship.cargo[item_name] += amount
+		else:
+			player_ship.cargo[item_name] = amount
+	elif buy and player_ship.cargo[item_name] >= amount:
+			player_ship.cargo[item_name] -= amount
+			player_ship.money += total_cost
+	super.action()

scripts/Base/Menu/dialogue.gd

@@ -4,6 +4,10 @@ extends NinePatchRect
 const BUY_FETCH = "BASE_FETCH_BUY"
 ## This message will trigger buy/sell node to fetch sell prices
 const SELL_FETCH = "BASE_FETCH_SELL"
+## This message will trigger dialogue to get selected item data
+const BUY_ITEM = "BASE_BUY_ITEM"
+## This message will trigger dialogue to get selected item data
+const SELL_ITEM = "BASE_SELL_ITEM"
 
 @onready var dialogue = $DialogueView
 @onready var buy_sell = $"../../BuySell"
@@ -24,7 +28,18 @@ func send_message(msg: Message):
 			format["buy_list"] = buy_sell.get_buy_sell_list(true)
 			actions_menu.buy = true
 			actions_menu.buy_sell_options = buy_sell.get_buy_sell_len(true)
-	
+		BUY_ITEM:
+			var list = buy_sell.items_on_sell
+			var id = actions_menu.buy_sell_selected_item
+			var item_name = list[id].name
+			format["amount"] = actions_menu.buy_sell_amount
+			format["item_name"] = item_name
+		SELL_ITEM:
+			var list = buy_sell.items_on_buy
+			var id = actions_menu.buy_sell_selected_item
+			var item_name = list[id].name
+			format["amount"] = actions_menu.buy_sell_amount
+			format["item_name"] = item_name
 	var new_msg = tr(msg.fact + "_RECEIVED").format(format)
 	var old_len = len(dialogue.get_parsed_text())
 	dialogue.append_text(new_msg)

scripts/Base/Menu/set_buy_sell_selected_item.gd

@@ -0,0 +1,7 @@
+extends MenuAction
+
+@onready var menu = get_parent()
+
+func action():
+	menu.buy_sell_selected_item = id - 1 + menu.buy_sell_tab * 6
+	get_parent().transit_menu(id)

scripts/Base/actions_menu.gd

@@ -14,12 +14,18 @@ extends Node
 
 var base
 
+var player_ship
+
 ## Script attached to transit buttons
 const TRANSIT_BUTTON_SCRIPT = preload("res://scripts/Classes/Menu/transit_button.gd")
 ## Buy/Sell item trigger
 const BUY_SELL_ITEM = "BUY_SELL_ITEM"
 ## Buy/Sell button placeholder
 const BASE_BUY_SELL = "BASE_BUY_SELL"
+## Button to buy amount of item
+const BASE_BUY_ITEM = "BASE_BUY_ITEM"
+## Button to sell amount of item
+const BASE_SELL_ITEM = "BASE_SELL_ITEM"
 ## Null button ID
 const NULL = "NULL"
 
@@ -32,6 +38,10 @@ var buy: bool = false
 var buy_sell_options: int = -1
 ## Which buy/sell tab should be opened (tab holds 6 items)
 var buy_sell_tab: int = 0
+## Which item is selected to buy/sell
+var buy_sell_selected_item: int = -1
+## How many items will be bought/sold
+var buy_sell_amount = 0
 
 func _ready():
 	load_menu()
@@ -39,6 +49,7 @@ func _ready():
 
 func post_ready():
 	base = get_parent().get_parent().get_parent().base
+	player_ship = base.player_ship
 
 ## Called when menu is changed
 func load_menu():
@@ -52,6 +63,11 @@ func load_menu():
 					format["item_id"] = i + buy_sell_tab * 6
 					format["item_name"] = tr(list[i - 1 + buy_sell_tab * 6].name)
 					menu.item_ids[i] = BUY_SELL_ITEM
+			BASE_BUY_ITEM:
+				format = get_buy_sell_button_format(buy_sell_selected_item, i)
+			BASE_SELL_ITEM:
+				format = get_buy_sell_button_format(buy_sell_selected_item, i)
+		actions[i].disabled = false
 		# disconnect previous action
 		if actions[i] is TransitButton:
 			actions[i].button_up.disconnect(transit_menu)
@@ -81,3 +97,40 @@ func transit_menu(id: int):
 	var new_menu = menu.item_data[id].load_menu().duplicate()
 	menu = new_menu
 	load_menu()
+
+func get_buy_sell_button_format(item_id: int, button_id: int) -> Dictionary:
+	var amount = 0
+	var prices = base.buy_prices if buy else base.sell_prices
+	var items = base.items_on_buy if buy else base.items_on_sell
+	var item_name = items[item_id].name
+	var price = prices[item_id]
+	match button_id:
+		1:
+			amount = 1
+		2:
+			amount = 5
+		3:
+			amount = 10
+		4:
+			amount = 50
+		5:
+			amount = 100
+		6:
+			if buy:
+				amount = roundi(player_ship.money / price)
+			elif item_name in player_ship.cargo:
+				amount = player_ship.cargo[item_name]
+		7:
+			if buy:
+				amount = roundi(player_ship.money / (price * 2))
+			elif item_name in player_ship.cargo:
+				amount = roundi(player_ship.cargo[item_name] / 2)
+	var total_cost = price * amount
+	var format = {
+		"amount": amount,
+		"total_cost": total_cost,
+		"item": item_name,
+		"item_name": tr(item_name),
+		"buy": buy
+	}
+	return format

scripts/Base/base.gd

@@ -123,16 +123,18 @@ func generate_prices():
 	# gen prices for buyable items
 	for i in range(len(items_on_buy)):
 		var item = items_on_buy[i]
+		var avg = (item.max_price + item.min_price) * 50
 		if item in items_on_sell:
 			# buy not higher than avg price
-			buy_prices.append(randi_range(item.min_price * 100, (item.max_price + item.min_price) * 50) / 100.0)
+			buy_prices.append(randi_range(item.min_price * 100, avg) / 100.0)
 		else:
 			buy_prices.append(randi_range(item.min_price * 100, item.max_price * 100) / 100.0)
 	# gen prices for items in sell
 	for i in range(len(items_on_sell)):
 		var item = items_on_sell[i]
+		var avg = (item.max_price + item.min_price) * 50
 		if item in items_on_buy:
 			# sell not lower than avg price
-			sell_prices.append(randi_range((item.min_price + item.max_price) * 50, item.max_price * 100) / 100.0)
+			sell_prices.append(randi_range(avg, item.max_price * 100) / 100.0)
 		else:
 			sell_prices.append(randi_range(item.min_price * 100, item.max_price * 100) / 100.0)