morphinggrid.morphing_log = {}

morphinggrid.registered_after_morphs = {}
morphinggrid.registered_after_demorphs = {}

morphinggrid.register_after_morph = function(fn)
  table.insert(morphinggrid.registered_after_morphs, fn)
end

morphinggrid.register_after_demorph = function(fn)
  table.insert(morphinggrid.registered_after_demorphs, fn)
end

--morph functions
dofile(minetest.get_modpath("morphinggrid").."/grid_functions.lua")

function morphinggrid.morph(player, ranger, morph_settings)
  if type (player) == "string" then
    player = minetest.get_player_by_name(player)
  end
  
  if type(ranger) == "string" then
    local ranger_name = ranger
    ranger = morphinggrid.registered_rangers[ranger_name]
    if ranger == nil then error("'"..ranger_name.."' is not a registered ranger.") end
  end
  
  morph_settings = morphinggrid.configure_morph_settings(morph_settings)
  local morph_info = {}
  
  local player_name = player:get_player_name()
  local can_use = minetest.check_player_privs(player_name, { power_rangers=true })
  
  local rangername_split = morphinggrid.split_string(ranger.name, ":")
  local rangertype = morphinggrid.get_rangertype(rangername_split[1])
  
  --morph info
  morph_info.type = "morph"
  morph_info.itemstack = morph_settings.itemstack
  morph_info.player = player
  morph_info.ranger = ranger
  morph_info.pos = player:get_pos()
  morph_info.reason = "unknown"
  morph_info.timestamp = os.date('%Y-%m-%d %H:%M:%S')
  
  if morphinggrid.connections[ranger.name].players[player:get_player_name()] == nil then
    morphinggrid.create_connection(ranger.name, player_name)
  end
  
  local result = false
  
  if morph_settings.priv_bypass then
   can_use = true
  end
  
  --do morph functions first.
  local morph_params = {
	player = morph_info.player,
	ranger = morph_info.ranger.name,
	pos = morph_info.pos,
	timestamp = morph_info.timestamp,
	itemstack = morph_info.itemstack
  }
  
  local mfunc_args = morphinggrid.call_grid_functions("before_morph", morph_params)
  
  --check for privs again if mfunc_args.recheck_privs is true. This doesn't override can_use if morph_settings.priv_bypass is true.
  --if mfunc_args.force_recheck_privs is true, then override can_use regardless.
  if mfunc_args.recheck_privs == true then
	if not morph_settings.priv_bypass then
		can_use = minetest.check_player_privs(player_name, { power_rangers=true })
	end
  elseif mfunc_args.force_recheck_privs == true then
	can_use = minetest.check_player_privs(player_name, { power_rangers=true })
  end
  
  if can_use == true then
	if not mfunc_args.cancel then
		local connection = morphinggrid.connections[ranger.name].players[player:get_player_name()]
		if connection.timer > 0 then
		  morph_info.reason = "not_stable"
		  if morph_settings.chat_messages then
		   local time_left = morphinggrid.seconds_to_clock(connection.timer)
		   minetest.chat_send_player(player_name, "You cannot morph because these ranger powers are not currently stable."..
		   " Please wait some time while the Morphing Grid re-stabelizes these ranger powers."..
		   " Approximately: "..time_left.days.." Days, "..time_left.hours.." Hours, "..time_left.minutes.." Minutes, "..time_left.seconds.." Seconds")
		  end
		  minetest.log("action","Player ("..player:get_player_name()..") Morphed: "..ranger.name..", "..(morph_info.reason or ""))
		  return false, morph_info
		end
		
		morphinggrid.save_current_armor(player)
		
		local inv = minetest.get_inventory({
		  type="detached", name=player_name.."_armor"})
		
		morphinggrid.demorph(player, {}, true)
		
		morphinggrid.connections[ranger.name].players[player:get_player_name()].in_use = true
		
		morphinggrid.set_ranger_meta(player, ranger)
		morphinggrid.set_ranger_abilities(player, ranger)
		
		for k, v in pairs(morph_settings.armor_parts) do
		  if v == true then
			local stack = ItemStack(rangername_split[1]..":"..k.."_"..rangername_split[2])
			stack:set_wear(morphinggrid.connections[ranger.name].players[player:get_player_name()].armor_wear)
			inv:add_item("armor", stack)
			armor:save_armor_inventory(player)
			armor:set_player_armor(player)
		  end
		end
    
		if ranger.hide_identity then
		  player:set_nametag_attributes({text = " "})
		end
		
		if ranger.hide_player or morph_settings.hide_player then
		  local meta = player:get_meta()
		  meta:set_string("morphinggrid_invis", "true")
		  local prop = {
			  collide_with_object = false,
			  pointable = false,
			  makes_footstep_sound = false,
			  visual_size = {x = 0, y = 0, z = 0},
		  }
		  player:set_properties(prop)
		end
		
		if morph_settings.show_hud then
		  morphinggrid.show_hud(player, ranger)
		end
    
		if morph_settings.chat_messages then
		  minetest.chat_send_player(player_name, "Morph successful (Ranger: "..ranger.description..")")
		end
		morph_info.reason = "successful"
		result = true
	else
		morph_params.canceled = true
		if morph_settings.chat_messages then
		  minetest.chat_send_player(player_name, mfunc_args.description or "Morph unsuccessful.".." (Ranger: "..ranger.description..")")
		end
		morph_info.reason = mfunc_args.reason or "canceled"
		result = true
	end
  else
    morph_info.reason = mfunc_args.reason or "no_permission"
    morph_settings.log_this = false
    minetest.chat_send_player(player_name, mfunc_args.description or "You don't have permisson to morph (Missing Privileges: power_rangers)")
  end
  
  --call after-morph functions
	morph_params.reason = morph_info.reason
	morph_params.canceled = mfunc_args.canceled
	morphinggrid.call_grid_functions("after_morph", morph_params)
  
  for k, v in pairs(morphinggrid.registered_after_morphs) do
    morphinggrid.registered_after_morphs[v](player, ranger.name, morph_info)
  end
  
  for i, v in ipairs(morphinggrid.registered_ranger_after_morphs) do
    if v == ranger.name then
      local rd = morphinggrid.get_ranger(v)
      rd.after_morph(player, morph_info)
    end
  end
  
  --Log
  if morph_settings.log_this then
   table.insert(morphinggrid.morphing_log, morph_info)
  end
  
  --get morpher name
  local morpher_name = "unknown"
  if morph_info.itemstack ~= nil then
	morpher_name = morph_info.itemstack:get_name()
  end
  
  minetest.log("action","Player ("..player:get_player_name()..") Morphed: "..ranger.name..", "..
  "Morpher: "..morpher_name..", "..(morph_info.reason or ""))
  return result, morph_info
end

function morphinggrid.demorph(player, demorph_settings, is_morphing)
  if type(player) == "string" then
    player = minetest.get_player_by_name(player)
  end
  
  demorph_settings = morphinggrid.configure_demorph_settings(demorph_settings)
  local demorph_info = {}
  
  local player_name = player:get_player_name()
  local can_use = minetest.check_player_privs(player_name, { power_rangers=true })
  
  local result = false
  
  if is_morphing == nil then is_morphing = false end
  
  local meta = player:get_meta()
  local ranger = morphinggrid.get_ranger(meta:get_string("player_morph_status"))
  
  --demorph info
  demorph_info.type = "demorph"
  demorph_info.player = player
  demorph_info.ranger = ranger
  demorph_info.pos = player:get_pos()
  demorph_info.reason = "unknown"
  demorph_info.timestamp = os.date('%Y-%m-%d %H:%M:%S')
  
  if demorph_settings.priv_bypass then
    can_use = true
  end
  
  --do demorph functions first.
  local getranger = ranger or {}
  local demorph_params = {
	player = demorph_info.player,
	ranger = getranger.name,
	pos = demorph_info.pos,
	timestamp = demorph_info.timestamp
  }
  
  if ranger == nil then
	demorph_params.morphed = false
  else
	demorph_params.morphed = true
  end
  
  local dmfunc_args = {}
  if is_morphing == false then
	dmfunc_args = morphinggrid.call_grid_functions("before_demorph", demorph_params)
  end
  
  --check for privs again if dmfunc_args.recheck_privs is true. This doesn't override can_use if demorph_settings.priv_bypass is true.
  --if dmfunc_args.force_recheck_privs is true, then override can_use regardless.
  if dmfunc_args.recheck_privs == true then
	if not demorph_settings.priv_bypass then
		can_use = minetest.check_player_privs(player_name, { power_rangers=true })
	end
  elseif dmfunc_args.force_recheck_privs == true then
	can_use = minetest.check_player_privs(player_name, { power_rangers=true })
  end
  
  if ranger ~= nil then
    if morphinggrid.connections[ranger.name].players[player:get_player_name()] == nil then
      morphinggrid.create_connection(ranger.name, player_name)
    end
  end
  
  if can_use == true then
    if is_morphing == true then
      local inv = minetest.get_inventory({
        type="detached", name=player_name.."_armor"})
      
      local wear = morphinggrid.get_current_ranger_wear(player)
      if wear ~= nil then
        morphinggrid.connections[ranger.name].players[player:get_player_name()].armor_wear = wear
        morphinggrid.connections[ranger.name].players[player:get_player_name()].in_use = false
      end
      
      inv:set_list("armor", {})
      
      armor:save_armor_inventory(player)
      armor:set_player_armor(player)
      
      player:set_nametag_attributes({text = ""})
      
      local is_invisible = meta:get_string("morphinggrid_invis")
      
      if is_invisible == "true" then
        player:set_string("morphinggrid_invis", "false")
        local prop = {
          collide_with_object = true,
          pointable = true,
          makes_footstep_sound = true,
          visual_size = {x = 1, y = 1, z = 1},
        }
        player:set_properties(prop)
      end
      
      if ranger ~= nil then
        local rangername_split = morphinggrid.split_string(ranger.name, ":")
        local rangertype = morphinggrid.get_rangertype(rangername_split[1])
        
        morphinggrid.remove_ranger_abilities(player, ranger)
        morphinggrid.remove_weapons(player, rangertype.weapons)
      end
      
      if demorph_settings.hide_hud then
        morphinggrid.hide_hud(player)
      end
      
      demorph_info.reason = "successful_durring_morph"
      demorph_settings.log_this = false
      result = true
    else --not morphing
		if not dmfunc_args.cancel then
		  if ranger == nil then
			demorph_info.reason = "not_morphed"
			demorph_settings.log_this = false
			
			morphinggrid.call_grid_functions("on_demorph_attempt", demorph_params)
			minetest.chat_send_player(player_name, "You are not morphed.")
		  else
			local inv = minetest.get_inventory({
			  type="detached", name=player_name.."_armor"})
			  
			local wear = morphinggrid.get_current_ranger_wear(player)
			if wear ~= nil then
			  morphinggrid.connections[ranger.name].players[player:get_player_name()].armor_wear = wear
			  morphinggrid.connections[ranger.name].players[player:get_player_name()].in_use = false
			end
			
			inv:set_list("armor", {})
			morphinggrid.load_last_armor(player)
			
			armor:save_armor_inventory(player)
			armor:set_player_armor(player)
			
			player:set_nametag_attributes({text = ""})
			
			local is_invisible = meta:get_string("morphinggrid_invis")
			
			if is_invisible == "true" then
			  player:set_string("morphinggrid_invis", "false")
			  local prop = {
				collide_with_object = true,
				pointable = true,
				makes_footstep_sound = true,
				visual_size = {x = 1, y = 1, z = 1},
			  }
			  player:set_properties(prop)
			end
			
			local rangername_split = morphinggrid.split_string(ranger.name, ":")
			local rangertype = morphinggrid.get_rangertype(rangername_split[1])
			
			morphinggrid.remove_ranger_abilities(player, ranger)
			morphinggrid.remove_weapons(player, rangertype.weapons)
			
			if demorph_settings.hide_hud then
			  morphinggrid.hide_hud(player)
			end
		  
			meta:set_string("player_morph_status", "none")
			
			if demorph_settings.chat_messages then
			  minetest.chat_send_player(player_name, "Demorph successful. (Ranger: "..ranger.description..")")
			end
			
			demorph_info.reason = "successful"
			result = true
		  end
		else
			demorph_params.canceled = true
			demorph_info.reason = dmfunc_args.reason or "canceled"
			demorph_settings.log_this = false
			if demorph_settings.chat_messages then
				minetest.chat_send_player(player_name, dmfunc_args.description or "Demorph unsuccessful.".." (Ranger: "..ranger.description..")")
			end
		end
    end
  else
    demorph_info.reason = "no_permission"
    demorph_settings.log_this = false
    minetest.chat_send_player(player_name, "You don't have permisson to demorph (Missing Privileges: power_rangers)")
  end
  
  local rangername = ""
  if ranger == nil then rangername = "none" else rangername = ranger.name end
  
  if not demorph_settings.voluntary then
    demorph_info.reason = "not_stable"
  end
  
  --call after-demorph functions
  if not is_morphing then
	demorph_params.reason = demorph_info.reason
	demorph_params.canceled = dmfunc_args.canceled
	morphinggrid.call_grid_functions("after_demorph", demorph_params)
  end
  
  for i, v in ipairs(morphinggrid.registered_after_demorphs) do
    morphinggrid.registered_after_demorphs[i](player, rangername, demorph_info)
  end
  
  for i, v in ipairs(morphinggrid.registered_ranger_after_demorphs) do
    if v == rangername then
      local rd = morphinggrid.get_ranger(v)
      rd.after_demorph(player, demorph_info)
    end
  end
  
  --Log
  if demorph_settings.log_this then
    table.insert(morphinggrid.morphing_log, demorph_info)
  end
  
  if ranger ~= nil then
    minetest.log("action","Player ("..player:get_player_name()..") Demorphed: "..ranger.name..", "..(demorph_info.reason or ""))
  end
  
  return result, demorph_info
end

function morphinggrid.configure_morph_settings(morph_settings)
  morph_settings = morph_settings or {}
  
  if morph_settings.hide_player == nil then morph_settings.hide_player = false end
  if morph_settings.priv_bypass == nil then morph_settings.priv_bypass = false end
  if morph_settings.chat_messages == nil then morph_settings.chat_messages = true end
  if morph_settings.log_this == nil then morph_settings.log_this = true end
  if morph_settings.show_hud == nil then morph_settings.show_hud = true end
  
  morph_settings.armor_parts = morph_settings.armor_parts or {}
  
  if morph_settings.armor_parts.helmet == nil then morph_settings.armor_parts.helmet = true end
  if morph_settings.armor_parts.chestplate == nil then morph_settings.armor_parts.chestplate = true end
  if morph_settings.armor_parts.leggings == nil then morph_settings.armor_parts.leggings = true end
  if morph_settings.armor_parts.boots == nil then morph_settings.armor_parts.boots = true end
  
  return morph_settings
end

function morphinggrid.configure_demorph_settings(demorph_settings)
  demorph_settings = demorph_settings or {}
  if demorph_settings.priv_bypass == nil then demorph_settings.priv_bypass = false end
  if demorph_settings.chat_messages == nil then demorph_settings.chat_messages = true end
  if demorph_settings.log_this == nil then demorph_settings.log_this = true end
  if demorph_settings.voluntary == nil then demorph_settings.voluntary = true end
  if demorph_settings.hide_hud == nil then demorph_settings.hide_hud = true end
  return demorph_settings
end

morphinggrid.huds = {}

--{
--        hud_elem_type = "image",  -- See HUD element types
--        -- Type of element, can be "image", "text", "statbar", or "inventory"
--
--        position = {x=0.5, y=0.5},
--        -- Left corner position of element
--
--        name = "<name>",
--
--        scale = {x = 2, y = 2},
--
--        text = "<text>",
--
--        number = 2,
--
--        item = 3,
--        -- Selected item in inventory. 0 for no item selected.
--
--        direction = 0,
--        -- Direction: 0: left-right, 1: right-left, 2: top-bottom, 3: bottom-top
--
--        alignment = {x=0, y=0},
--
--        offset = {x=0, y=0},
--
--        size = { x=100, y=100 },
--        -- Size of element in pixels
--
--        z_index = 0,
--        -- Z index : lower z-index HUDs are displayed behind higher z-index HUDs
--    }

minetest.after(0, function()
  local storage = morphinggrid.mod_storage.get_string("morphinggrid_huds")
  if storage ~= "" then
    morphinggrid.huds = minetest.deserialize(storage)
  end
end)

minetest.register_on_joinplayer(function(player)
  if morphinggrid.huds[player:get_player_name()] ~= nil then
    local ranger = morphinggrid.get_morph_status(player)
    if ranger ~= nil then
      morphinggrid.show_hud(player, ranger, true)
    end
  end
end)

function morphinggrid.show_hud(player, ranger, startup)
  if type(player) == "string" then
    player = minetest.get_player_by_name(player)
  end
  
  if type(ranger) == "string" then
    ranger = morphinggrid.registered_rangers[ranger]
  end
  
  local wear = morphinggrid.connections[ranger.name].players[player:get_player_name()].armor_wear or 0
  local power_usage = ((((65535-wear)/65535)*10)*2)
  
  local position = {x=0.5,y=0.8}
  local hud = {
    title = {
      hud_elem_type = "text",
      position = position,
      offset = {x=0,y=-32},
      text = "Morph Status:",
      number = "0xFFFFFF"
    },
    ranger = {
      hud_elem_type = "text",
      position = position,
      offset = {x=0,y=0},
      text = "Ranger: "..ranger.description,
      number = "0xFFFFFF"
    },
    status = {
      hud_elem_type = "statbar",
      position = position,
      offset = {x=-160,y=32},
      text = "morphinggrid_power_usage_32.png",
      number = power_usage
    }
  }
  
  if startup then
    local _, err = pcall(morphinggrid.hide_hud,player)
    morphinggrid.huds[player:get_player_name()] = nil
  end
  
  if morphinggrid.huds[player:get_player_name()] == nil then
    morphinggrid.huds[player:get_player_name()] = {}
    morphinggrid.huds[player:get_player_name()].title = player:hud_add(hud.title)
    morphinggrid.huds[player:get_player_name()].ranger = player:hud_add(hud.ranger)
    morphinggrid.huds[player:get_player_name()].status = player:hud_add(hud.status)
  end
  
  morphinggrid.mod_storage.set_string("morphinggrid_huds",minetest.serialize(morphinggrid.huds))
end

function morphinggrid.hide_hud(player)
  if type(player) == "string" then
    player = minetest.get_player_by_name(player)
  end
  
  local huds = morphinggrid.huds[player:get_player_name()]
  if huds ~= nil then
    player:hud_remove(huds.title)
    player:hud_remove(huds.ranger)
    player:hud_remove(huds.status)
    morphinggrid.huds[player:get_player_name()] = nil
  end
end

function morphinggrid.hud_update_power_usage(player)
  if type(player) == "string" then
    player = minetest.get_player_by_name(player)
  end
  
  if morphinggrid.hud_is_visible(player) then
    local current = morphinggrid.get_current_ranger_wear(player)
    local amount = ((((65535-current)/65535)*10)*2)
    player:hud_change(morphinggrid.huds[player:get_player_name()].status,"number",math.floor(amount))
  end
end

function morphinggrid.hud_is_visible(player)
  if type(player) == "string" then
    player = minetest.get_player_by_name(player)
  end
  
  if morphinggrid.huds[player:get_player_name()] ~= nil then
    return true
  end
  return false
end

function morphinggrid.set_ranger_meta(player, ranger)
  local meta = player:get_meta()
  local rangername_split = morphinggrid.split_string(ranger.name, ":")
  local rangertype = morphinggrid.get_rangertype(rangername_split[1])
  
  meta:set_string('player_morph_status', ranger.name)
  meta:set_string('player_last_morph_status', ranger.name)
end

function morphinggrid.save_current_armor(player)
  local is_morphed = morphinggrid.get_morph_status(player)
  if is_morphed == nil then
    local inv = minetest.get_inventory({
      type="detached", name=player:get_player_name().."_armor"})
      
    local list_ = inv:get_list("armor")
    local list = {}
    
    for i,v in ipairs(list_) do
      table.insert(list, v:get_name().." "..v:get_count())
    end
    
    player:get_meta():set_string("saved_armor", minetest.serialize(list))
  end
  return false
end

function morphinggrid.load_last_armor(player)
  local list_ = minetest.deserialize(player:get_meta():get_string("saved_armor")) or {}
  local list = {}
  
  for i,v in ipairs(list_) do
    table.insert(list, ItemStack(v))
  end
  
  local inv = minetest.get_inventory({
    type="detached", name=player:get_player_name().."_armor"})
  
  inv:set_list("armor", list)
end

function morphinggrid.set_ranger_abilities(player, ranger)
  --wieldhand
  local inv = player:get_inventory()
  local stack = inv:get_stack("hand", 1)
  local meta = stack:get_meta()
  
  local default_ranger_hand = {
      full_punch_interval = 0.1,
      max_drop_level = 0,
      groupcaps = {
        crumbly = {times={[2]=3.00, [3]=0.70}, uses=0, maxlevel=1},
        snappy={times={[1]=1.90, [2]=0.90, [3]=0.30}, uses=1, maxlevel=3},
        cracky={times={[50]=0.10}, uses=1, maxlevel=50},
        oddly_breakable_by_hand = {times={[1]=3.50,[2]=2.00,[3]=0.70}, uses=0}
      },
      damage_groups = {fleshy=15},
  }
  
  local tool_capabilities = ranger.abilities.strength or default_ranger_hand
  
  meta:set_tool_capabilities(tool_capabilities)
  inv:set_stack("hand", 1, stack)
end

function morphinggrid.remove_ranger_abilities(player, ranger)
  --wieldhand
  local inv = player:get_inventory()
  local stack = inv:get_stack("hand", 1)
  local meta = stack:get_meta()
  meta:set_tool_capabilities(nil)
  inv:set_stack("hand", 1, stack)
end

function morphinggrid.remove_weapons(player, weapons)
  local inv = player:get_inventory()
  for _, weapon in pairs(weapons) do
    local inv_list = inv:get_list("main")
    for _, stack in pairs(inv_list) do
      if stack:get_name() == weapon then
        inv:remove_item("main", stack)
      end
    end
  end
end

function morphinggrid.get_morph_status(player)
  local meta = player:get_meta()
  local status = meta:get_string('player_morph_status')
  if status ~= "none" and status ~= nil and status ~= "" then
    return status
  else
    return nil
  end
end

function morphinggrid.get_last_morph_status(player)
  local meta = player:get_meta()
  local status = meta:get_string('player_last_morph_status')
  if status ~= "none" and status ~= nil and status ~= "" then
    return status
  else
    return nil
  end
end

function morphinggrid.get_current_ranger_wear(player)
  local ranger = morphinggrid.registered_rangers[morphinggrid.get_morph_status(player)]
  if ranger ~= nil then
    local inv = minetest.get_inventory({
      type="detached", name=player:get_player_name().."_armor"})
      
    for k, v in pairs(inv:get_list("armor")) do
      if v:get_count() > 0 then
        return v:get_wear(), ranger
      end
    end
  end
  return nil, nil
end

--Morphing log
function morphinggrid.get_morphing_log()
  return morphinggrid.morphing_log
end

function morphinggrid.get_player_morphing_log(player)
  local t = {}
  for i, v in ipairs(morphinggrid.morphing_log) do
    if v.player:get_player_name() == player:get_player_name() then
      table.insert(t, v)
    end
  end
  return t
end