--Author: Valansch

local wrech_items_module = require "map_gen.misc.wreck_items"

local resource_types = {"copper-ore", "iron-ore", "coal", "stone", "uranium-ore", "crude-oil"}

global.current_portal_index = 1
global.portals = {}
--Sample Portal:
--{position : LuaPosition, source: LuaSurface, target : LuaPosition, target_surface : LuaSurface}

global.current_magic_chest_index = 1
global.magic_chests = {}
--{entity : LuaEntity, target : LuaEntity}


global.last_tp = {}
global.teleport_cooldown = 3
global.portal_radius = 2


local function get_nice_surface_name(name)
  name = name:gsub("-ore", ""):gsub("-oil", " Oil")
  return name:sub(1,1):upper() .. name:sub(2)
end

--Creates autoplace_controls with only one resource type enabled
local function create_resource_setting(resource)
  local settings = game.surfaces[1].map_gen_settings
  for _,type in pairs(resource_types) do
    settings.autoplace_controls[type] = {frequency = "none", size = "none", richness = "none"}
  end
  settings.autoplace_controls[resource] = {frequency = "normal", size = "big", richness = "good"}
  return settings
end
local function init()
  if not game.surfaces[2] then
    for _,type in pairs(resource_types) do
      game.create_surface(get_nice_surface_name(type), create_resource_setting(type))
    end
    local enemy_settings = create_resource_setting("enemy-base")
    enemy_settings.autoplace_controls["enemy-base"] = {frequency = "very-high", size = "very-big", richness = "very-good"}
    game.create_surface("Zerus", enemy_settings)
    game.create_surface("Nihil", create_resource_setting("copper-ore"))
  end
end

local function generate_nihil(event)
  for _,e in pairs(event.surface.find_entities_filtered{}) do
    if e.type ~= "player" then
      e.destroy()
    end
  end
  local tiles = {}
  for x = event.area.left_top.x, event.area.right_bottom.x do
    for y = event.area.left_top.y, event.area.right_bottom.y do
      table.insert(tiles,{name="lab-dark-1", position = {x,y}})
    end
  end
  event.surface.set_tiles(tiles)
end

function run_combined_module(event)
  init()
  if event.surface.name == "Zerus" then
    wrech_items_module.on_chunk_generated(event)
  elseif event.surface.name == "Nihil" then
    generate_nihil(event)
  end
end

local function teleport_nearby_players(portal)
  for _, player_character in pairs(portal.source.find_entities_filtered{area = {{portal.position.x - global.portal_radius,portal.position.y - global.portal_radius},{portal.position.x + global.portal_radius,portal.position.y + global.portal_radius}}, name = "player", type = "player"}) do
    local player = player_character.player
      if not global.last_tp[player.name] or global.last_tp[player.name] + global.teleport_cooldown * 60 < game.tick then
        player.teleport(portal.target, portal.target_surface)
        global.last_tp[player.name] = game.tick
        player.print("Wooosh! You are now in the " .. portal.target_surface.name .. " dimention.")
      end
    end
end

local function teleport_players()
  local num_portals = #global.portals
  if num_portals > 0 then
    local portal = global.portals[global.current_portal_index]
    if portal.target then
        teleport_nearby_players(portal)
    end
    global.current_portal_index = (global.current_portal_index) % num_portals + 1 --Next portal
  end
end

local function teleport_stuff()
  local num_chests = #global.magic_chests
  if num_chests > 0 then
    local chest = global.magic_chests[global.current_magic_chest_index]
    if chest.entity and chest.target and chest.entity.valid and chest.target.valid then
      local inv = chest.entity.get_inventory(defines.inventory.chest)
      local target_inv = chest.target.get_inventory(defines.inventory.chest)
      if inv and target_inv then
        for item, count in pairs(inv.get_contents()) do
          local n_inserted = target_inv.insert{name = item, count = count}
          if n_inserted > 0 then
            inv.remove{name = item, count = n_inserted}
          end
        end
      end
    end
    global.current_magic_chest_index = (global.current_magic_chest_index) % num_chests + 1 --Next magic chest
  end
end

local function dim_on_tick(event)
  if game.tick % 2 == 0 then
    teleport_stuff()
  else
    teleport_players()
  end
end

global.chest_selected = false
local function linkchests()
  if game.player and game.player.admin and game.player.selected and (game.player.selected.type == "logistic-container" or game.player.selected.type == "container") then
    game.player.selected.destructible = false
    game.player.selected.minable = false
    if global.chest_selected then
      global.magic_chests[#global.magic_chests].target = game.player.selected
      game.print("Link established.")
    else
      table.insert(global.magic_chests, {entity = game.player.selected})
      game.print("Selected first chest.")
    end
    global.chest_selected = not global.chest_selected
  else
    game.print("failed.")
  end
end

global.portal_selected = false
local function linkportals()
    if game.player and game.player.admin then
      if global.portal_selected then
        global.portals[#global.portals].target = game.player.position
        global.portals[#global.portals].target_surface = game.player.surface
        --Way back home:
        table.insert(global.portals, {position = game.player.position, target = global.portals[#global.portals].position, source = game.player.surface, target_surface = global.portals[#global.portals].source})
        game.print("Portal link established.")
      else
          table.insert(global.portals, {position = game.player.position, source = game.player.surface})
          game.print("Selected first portal.")
      end
      global.portal_selected = not global.portal_selected
    else
        game.print("failed.")
    end
end

commands.add_command("linkchests", "Select a chest to link to another. Run this command again to select the other one.", linkchests)
commands.add_command("linkportals", "Select a portal to link to another. Run this command again to select the other one.", linkportals)
Event.register(defines.events.on_tick, dim_on_tick)