--
-- Formspecs
--

function forestry_bees.get_apiary_active_formspec(queen_percent)
	return "size[8,8.5]"..
		"list[context;monarch;2.75,0.5;1,1;]"..
		"list[context;drone;2.75,2.5;1,1;]"..
		"image[3.75,1.5;1,1;gui_furnace_arrow_bg.png^[lowpart:"..
		(queen_percent)..":gui_furnace_arrow_fg.png^[transformR270]"..
		"list[context;dst;4.75,0.96;3,3;]"..
		"list[current_player;main;0,4.25;8,1;]"..
		"list[current_player;main;0,5.5;8,3;8]"..
		"listring[context;dst]"..
		"listring[current_player;main]"..
		"listring[context;src]"..
		"listring[current_player;main]"..
		"listring[context;fuel]"..
		"listring[current_player;main]"..
		default.get_hotbar_bg(0, 4.25)
end

function forestry_bees.get_apiary_inactive_formspec()
	return "size[8,8.5]"..
		"list[context;monarch;2.75,0.5;1,1;]"..
		"list[context;drone;2.75,2.5;1,1;]"..
		"image[3.75,1.5;1,1;gui_furnace_arrow_bg.png^[transformR270]"..
		"list[context;dst;4.75,0.96;3,3;]"..
		"list[current_player;main;0,4.25;8,1;]"..
		"list[current_player;main;0,5.5;8,3;8]"..
		"listring[context;dst]"..
		"listring[current_player;main]"..
		"listring[context;src]"..
		"listring[current_player;main]"..
		"listring[context;fuel]"..
		"listring[current_player;main]"..
		default.get_hotbar_bg(0, 4.25)
end

--
-- Node callback functions that are the same for active and inactive furnace
--

local function can_dig(pos, player)
	local meta = minetest.get_meta(pos);
	local inv = meta:get_inventory()
	return inv:is_empty("monarch") and inv:is_empty("drone") and inv:is_empty("dst")
end

local function allow_metadata_inventory_put(pos, listname, index, stack, player)
	if minetest.is_protected(pos, player:get_player_name()) then
		return 0
	end
	local meta = minetest.get_meta(pos)
	local inv = meta:get_inventory()
	if listname == "drone" then
    if minetest.get_item_group(stack:get_name(),"bee_drone") == 1 then
      return stack:get_count()
    else
			return 0
		end
	elseif listname == "monarch" then
    if minetest.get_item_group(stack:get_name(),"bee_monarch") == 1 then
      return stack:get_count()
    else
			return 0
		end
	elseif listname == "dst" then
		return 0
	end
end

local function allow_metadata_inventory_move(pos, from_list, from_index, to_list, to_index, count, player)
	local meta = minetest.get_meta(pos)
	local inv = meta:get_inventory()
	local stack = inv:get_stack(from_list, from_index)
	return allow_metadata_inventory_put(pos, to_list, to_index, stack, player)
end

local function allow_metadata_inventory_take(pos, listname, index, stack, player)
	if minetest.is_protected(pos, player:get_player_name()) then
		return 0
	end
	return stack:get_count()
end

local function swap_node(pos, name)
	local node = minetest.get_node(pos)
	if node.name == name then
		return
	end
	node.name = name
	minetest.swap_node(pos, node)
end

local function breed_princess_drone(princess,drone)
  local princess_meta = princess:get_meta()
  local drone_meta = drone:get_meta()
	local queen = forestry_bees.Bee("queen",
                                  princess_meta:get_string("active_gene"),
                                  princess_meta:get_string("inactive_gene"))
  local queen_meta = queen:get_meta()
  queen_meta:set_string("drone_active_gene",drone_meta:get_string("active_gene"))
  queen_meta:set_string("drone_inactive_gene",drone_meta:get_string("inactive_gene"))
  return queen
end

local function apiary_result(queen)
	--given a queen calculates the correct princess + drone output
	--atm easy just returns the same princess and the same drone
	local meta = queen:get_meta()
	--the "meta" of the queen is the princess meta and the drone_"meta" is the drone meta
	local princess = forestry_bees.Bee("princess",meta:get_string("active_gene"),meta:get_string("inactive_gene"))
	local drone = forestry_bees.Bee("drone",meta:get_string("drone_active_gene"),meta:get_string("drone_inactive_gene"))
	drone:set_count(2)
	return princess, drone
end

local function apiary_node_timer(pos,elapsed)
    local meta = minetest.get_meta(pos)
    local src_time = meta:get_float("src_time") or 0  --how much time has passed since src started actioning
    local inv = meta:get_inventory()
    local monarchlist, dronelist
    local timer_elapsed = meta:get_int("timer_elapsed") or 0
    meta:set_int("timer_elapsed", timer_elapsed + 1)
    local update = true
    local is_queen, is_princess, is_drone
    local can_breed, can_live
    local actionable
    
    local breedtime = 5 --hardcoded for now
    
    while elapsed > 0 and update do
        update = false
        monarchlist = inv:get_list("monarch")
        dronelist = inv:get_list("drone")
        is_queen = minetest.get_item_group(monarchlist[1]:get_name(),"bee_queen") == 1
        is_princess = minetest.get_item_group(monarchlist[1]:get_name(),"bee_princess") == 1
        is_drone = minetest.get_item_group(dronelist[1]:get_name(),"bee_drone") == 1
        
        can_breed = is_princess and is_drone
        can_live = is_queen
        actionable = can_breed or can_live
        
		local el = elapsed
		if actionable then -- adjust el to action duration
			el = math.min(el, breedtime - src_time)
		end
		
		--if actionable check if things are ready
		if actionable then
			src_time = src_time + el
			if src_time >= breedtime then
				--if possible act accordingly to breed or live
				if can_breed then
          local queen = breed_princess_drone(monarchlist[1],dronelist[1])
          local drone_count = dronelist[1]:get_count()
          if drone_count >1 then
            local final_drone = dronelist[1]:set_count(dronelist[1]:get_count()-1)
          else
            final_drone = ItemStack()
          end
          inv:set_stack("monarch",1,queen)
          inv:set_stack("drone",1,final_drone)
          src_time = src_time - breedtime
        else --if actionable but not can_breed we have can_live
          local queen = monarchlist[1]
          local princess, drone = apiary_result(queen)
          
          if inv:get_size("dst")-forestry_bees.stacks_in_inv(inv,"dst")>=2 then
            inv:add_item("dst",princess)
            inv:add_item("dst",drone)
            inv:set_stack("monarch",1,ItemStack())
            src_time = src_time - breedtime
            update = true
          else
            minetest.chat_send_all("dst_full")
            dst_full = true
          end
				end
			end
		end
		elapsed = elapsed - el
    end
    
    if monarchlist and monarchlist[1]:is_empty() then
      src_time = 0
    end
    --
    -- Update formspec, infotext and node
    --
    local formspec
    local item_state
    local queen_percent = 0
    if actionable then
      queen_percent = math.floor(src_time / breedtime * 100)
      if dst_full then
        item_state = "100% (output full)"
      else
        item_state = tostring(item_percent).."%"
      end
    else
      if (monarchlist and not monarchlist[1]:is_empty()) or (dronelist and not dronelist[1]:is_empty()) then
        item_state = "Cannot breed"
      else
        item_state = "Empty"
      end
    end
    local result = false
    formspec = forestry_bees.get_apiary_active_formspec(queen_percent)
    --make sure timer restarts
    result = true

	meta:set_float("src_time", src_time)
	meta:set_string("formspec", formspec)

	return result

end

--
-- Node definitions
--

local function apply_logger(def)
	default.set_inventory_action_loggers(def, "apiary")
	return def
end

minetest.register_node("forestry_bees:apiary", apply_logger({
	description = "Apiary",
	tiles = {
		"forestry_bees_apiary_y.png", "forestry_bees_apiary_y.png",
		"forestry_bees_apiary_front.png", "forestry_bees_apiary_front.png",
		"forestry_bees_apiary_side.png", "forestry_bees_apiary_side.png"
	},
	paramtype2 = "facedir",
	groups = {choppy=2},
	legacy_facedir_simple = true,
	is_ground_content = false,
	sounds = default.node_sound_wood_defaults(),

	can_dig = can_dig,

	on_timer = apiary_node_timer,

	on_construct = function(pos)
		local meta = minetest.get_meta(pos)
		local inv = meta:get_inventory()
		inv:set_size('monarch', 1)
		inv:set_size('drone', 1)
		inv:set_size('dst', 9)
		apiary_node_timer(pos, 0)
	end,

	on_metadata_inventory_move = function(pos)
		minetest.get_node_timer(pos):start(1.0)
	end,
	on_metadata_inventory_put = function(pos)
		-- start timer function, it will sort out whether apiary can work or not.
		minetest.get_node_timer(pos):start(1.0)
	end,
	on_metadata_inventory_take = function(pos)
		-- check whether the apiary is empty or not.
		minetest.get_node_timer(pos):start(1.0)
	end,
	on_blast = function(pos)
		local drops = {}
		default.get_inventory_drops(pos, "monarch", drops)
		default.get_inventory_drops(pos, "drone", drops)
		default.get_inventory_drops(pos, "dst", drops)
		drops[#drops+1] = "forestry_bees:apiary"
		minetest.remove_node(pos)
		return drops
	end,

	allow_metadata_inventory_put = allow_metadata_inventory_put,
	allow_metadata_inventory_move = allow_metadata_inventory_move,
	allow_metadata_inventory_take = allow_metadata_inventory_take,
}))

minetest.register_craft({
	output = "forestry_bees:apiary",
	recipe = {
		{"group:choppy,slab", "group:choppy,slab", "group:choppy,slab"},
		{"group:wood", "group:comb", "group:wood"},
		{"group:wood", "group:wood", "group:wood"},
	}
})