-- Public Inventory Plus Mod for Minetest
-- Created 2022 by activivan

-- Standard-Setup
local storage = minetest.get_mod_storage()
local S = minetest.get_translator(minetest.get_current_modname())
local conf = minetest.settings
local cols = tonumber(conf:get("pubinv_cols")) or 9
local rows = tonumber(conf:get("pubinv_rows")) or 6

-- Globale Variable für API und Integration!
pubinv = {}

-- Funktionen zum Speichern/Laden
local function save(inv_list)
  local data = {}
  for _, item in ipairs(inv_list) do
    table.insert(data, item:to_string())
  end
  storage:set_string("main", minetest.serialize(data))
end

-- Detached Inventory erzeugen
local pi = minetest.create_detached_inventory("pi", {
  on_put = function(inv)
    save(inv:get_list("main"))
  end,
  on_take = function(inv)
    save(inv:get_list("main"))
  end,
})
pi:set_size("main", (cols * rows))

-- Ladefunktion
local function load()
  local data = storage:get("main")
  if data then
    local inv_list = minetest.deserialize(data)
    pi:set_list("main", inv_list)
  end
end
load()

-- Formspez-Generierung
pubinv.formspec = function(name)
  local inv_size = (minetest.get_inventory({ type="player", name=name })):get_size("main")
  local inv_rows = math.ceil(inv_size / cols)
  local size = "size["..cols..","..(rows + 1.25 + inv_rows)..";]"
  return (size..
    "label[0,0;"..S("Public inventory").."]"..
    "list[detached:pi;main;0,0.5;"..cols..","..rows..";]"..
    (mcl_formspec and mcl_formspec.get_itemslot_bg(0, 0.5, cols, rows) or "")..
    "label[0,"..(rows + 0.75)..";"..S("Your inventory").."]"..
    "list[current_player;main;0,"..(rows + 1.25)..";"..((inv_size > cols) and cols or inv_size)..","..((inv_size > cols) and inv_rows or 1)..";]"..
    (mcl_formspec and
      mcl_formspec.get_itemslot_bg(0, (rows + 1.25), ((inv_size > cols) and cols or inv_size), ((inv_size > cols) and (inv_rows - 1) or 1))..
      ((inv_size > cols) and mcl_formspec.get_itemslot_bg(0, (rows + inv_rows + 0.25), (inv_size - (cols * (inv_rows - 1))), 1) or "")
      or ""
    )..
    "listring[]"
  ), size
end

-- Formspez anzeigen
pubinv.open = function(name)
  local formspec, _ = pubinv.formspec(name)
  minetest.show_formspec(name, "pubinv:pi", formspec)
  return true, ""
end

-- Chatbefehl
minetest.register_chatcommand("pi", {
  params = "",
  description = S("Opens the public inventory"),
  func = function(name)
    pubinv.open(name)
  end,
})

-- unified_inventory Button
if unified_inventory then
  unified_inventory.register_button("pubinv", {
    type = "image",
    image = "ui_icon_pubinv.png",
    tooltip = S("Public inventory"),
    hide_lite = false,
    action = function(player)
      pubinv.open(player:get_player_name())
    end
  })
end

-- sfinv Integration
if minetest.global_exists("sfinv") then
  sfinv.register_page("pubinv", {
    title = S("Public inventory"),
    get = function(self, player, context)
      local formspec, size = pubinv.formspec(player:get_player_name())
      return sfinv.make_formspec(player, context, formspec, false, size)
    end
  })
end

-- Public inventory i3-Tab hinzufügen - immer, egal ob i3 existiert!
minetest.after(0, function()
  if minetest.global_exists("i3_extrabuttons") then
    i3_extrabuttons.new_tab("pubinv", {
      description = "Öffentliches Inventar",
      -- priv = "",
      formspec = function(player, data, fs) end,
      fields = function(player, data, fields)
        i3.set_tab(player, "inventory")
        
        -- Hier der Aufruf des tatsächlichen Mods
        pubinv.open(player:get_player_name())
      end,
    })
  end
end)