fixed ci

.drone.yml

@@ -10,6 +10,18 @@ steps:
       - marp presentation.md -o index.html
       - cp * /home/andr3/services/notes/presentation
 
+  - name: Create release
+    environment:
+      TOKEN:
+        from_secret: token
+    commands:
+      - cp lib/server.ex . 
+      - zip server.zip server.ex README.md
+      - tea login add --url https://git.andr3h3nriqu3s.com --token "$TOKEN"
+      - tea r rm -y latest || echo "Release not found"
+      - tea r c --title "Latest" --asset "README.md" --asset "lib/paxos.ex" --asset "lib/server.ex" --asset "server.zip" latest
+      
+
 trigger:
   branch:
     - main

README.md

@@ -0,0 +1 @@
+# TODO

lib/paxos.ex

@@ -1,7 +1,30 @@
+#
+#  This files contains some modules nessesary for paxos to work
+#
+#     Utils: General Utilities
+#     Paxos: Paxos logic
+#     Ballot: Contain the logic to handle the ballot numbers
+#     EventualLeaderElector: Leader elector code
+#     EagerReliableBroadcast: Handles eager reliable broadcast
+#
+
 defmodule Utils do
+  @moduledoc """
+    This module contains some helpful functions are used throughout all modules
+  """
   
-  @min_print_level 1
+  @doc """
+    Sets the min log level
+    0 - show all
+    1 - ignore paxos
+    2 - ignore server
+  """
+  @min_print_level 3
   
+  @doc """
+    This function works similiary with unicast but it allows both for a pid or an atom 
+    to be given as the first parameter
+  """
   def safecast(p, m) when p == nil, do: IO.puts('Trying to safecast #{m} with p as nil')
   def safecast(p, m) when is_pid(p), do: send(p, m)
   def safecast(p, m) do
@@ -11,9 +34,19 @@ defmodule Utils do
     end
   end
 
+  @doc """
+    This function creates a new name for processes
+  """
   def alter_name(name, part), do: :"#{name}#{part}"
+
+  @doc """
+    This function sends a message to a list of porcesses
+  """
   def beb_broadcast(m, dest), do: for(p <- dest, do: safecast(p, m))
 
+  @doc """
+    This function register a pid in the global name space
+  """
   def register_name(name, pid, link \\ true) do
     case :global.re_register_name(name, pid) do
       :yes ->
@@ -30,6 +63,9 @@ defmodule Utils do
     end
   end
   
+  @doc """
+    This macro defines a new log function for a specific log level
+  """
   defmacro create_log(level) do
     quote do
       def log(msg) do
@@ -38,12 +74,25 @@ defmodule Utils do
     end
   end
   
+  @doc """
+    This function is used bu the create_log macro.
+
+    This function only prints logs if the level definied in the create_log macro
+  """
   def _log(msg, level) do
     if (@min_print_level <= level) do
       IO.puts(msg)
     end
   end
   
+  @doc """
+    This macro defines a an or_state function that acts like this:
+      if val do
+        expr
+      else
+        state
+      end
+  """
   defmacro or_state(val, do: expr) do
     quote do
       case unquote(val) do
@@ -53,6 +102,9 @@ defmodule Utils do
     end
   end
   
+  @doc """
+    This macro defines a macro to simplify the process of creating run functions
+  """
   defmacro runfn(do: expr) do
     quote do
       def run(s) do
@@ -65,20 +117,25 @@ defmodule Utils do
   end
 end
 
-#
-#
-# Possible actions
-#  :kill_before_decision 
-#  :increase_ballot_number - this makes it so that it does not propose but jump simply increases the number of the current ballot
-#                            this is usefull when forcing a nack
-#
 defmodule Paxos do
+  @moduledoc """
+    This module contains all the logic for Paxos
+
+    To start a paxos instance run Paxos.start
+
+    To propose a a value to paxos run Paxos.propose
+
+    To get a previous decision please run Paxos.get_decision
+  """
   require Utils
   import Utils
 
   create_log 0
   
-  defmacro set_instmap(do: expr) do
+  @doc """
+    This macro allows the state.instmap to be updated very easily
+  """
+  defmacrop set_instmap(do: expr) do
     quote do
       var!(map) = var!(state).instmap[var!(inst)]
       new_instmap = Map.put(var!(state).instmap, var!(inst), unquote(expr))
@@ -86,7 +143,9 @@ defmodule Paxos do
     end
   end
   
-  # Starts the Paxos replica with a specific name and some processes
+  @doc """
+    Starts the Paxos replica with a specific name and some processes
+  """
   def start(name, processes, link \\ false) do
     log("Starting paxos for #{name}")
 
@@ -94,8 +153,9 @@ defmodule Paxos do
     register_name(name, pid, link)
   end
   
-  # Init event must be the first
-  # one after the component is created
+  @doc """
+    Inicializes the state starts the eager reliable broadcast, and starts the eventual leader eletector
+  """
   def init(name, processes) do
     EventualLeaderElector.start(name, processes)
     EagerReliableBroadcast.start(name, processes)
@@ -111,8 +171,10 @@ defmodule Paxos do
     run(state)
   end
   
-  # Guarantees that a specific state exists
-  def has_or_create(state, inst, value \\ nil, pid_to_inform \\ nil, action \\ nil) do
+  @doc """
+    Guarantees that a specific state exists for a specific instance
+  """
+  defp has_or_create(state, inst, value \\ nil, pid_to_inform \\ nil, action \\ nil) do
     or_state state.instmap[inst] == nil do
       instmap =
         Map.put(state.instmap, inst, %{
@@ -135,7 +197,12 @@ defmodule Paxos do
     end
   end
   
-  def has_finished(state, inst, ignore_aborted \\ false) do
+  @doc """
+    Checks if an instance has finished or if it was aborted. 
+    If the optional parameter ignore_aborted was set to true makes this function only check
+      if the the instance has finished
+  """
+  defp has_finished(state, inst, ignore_aborted \\ false) do
     cond do
       Map.has_key?(state.decided, inst) -> true
       ignore_aborted -> false
@@ -144,7 +211,23 @@ defmodule Paxos do
     end
   end
   
+  @doc """
+    This is the run/recieve function
+    All the messages that are handled by this function are:
+      {:ele_trust, proc} ->
+      {:propose, inst, value, pid_to_inform, action} ->
+      {:rb_deliver, proc, {:other_propose, inst, value}} ->
+      {:rb_deliver, proc, {:prepare, proc, inst, ballot}} ->
+      {:nack, inst, ballot} ->
+      {:rb_deliver, _proc, {:abort, inst, ballot}} ->
+      {:prepared, inst, ballot, accepted_ballot, accepted_value} ->
+      {:rb_deliver, proc, {:accept, inst, ballot, value}} ->
+      {:accepted, inst, ballot} ->
+      {:get_value, inst, pid_to_inform} ->
+      {:rb_deliver, _, {:decide, inst, value}} ->
+  """
   runfn do
+    # Handles leader elector
     {:ele_trust, proc} ->
       log("#{state.name} - #{proc} is leader")
 
@@ -152,6 +235,7 @@ defmodule Paxos do
         prepare(st, inst)
       end)
     
+    # Handles a proposal from the parent process
     {:propose, inst, value, pid_to_inform, action} ->
       log("#{state.name} - Propose #{inspect(inst)} with action #{inspect(action)}")
 
@@ -192,6 +276,7 @@ defmodule Paxos do
           prepare(state, inst)
       end
     
+    # Handles the sharing of a proposal value to other processes
     {:rb_deliver, proc, {:other_propose, inst, value}} ->
       cond do
         has_finished(state, inst, true) ->
@@ -209,6 +294,7 @@ defmodule Paxos do
           prepare(state, inst)
       end
     
+    # Handles a prepare request from the leader
     {:rb_deliver, proc, {:prepare, proc, inst, ballot}} ->
       log("#{state.name} - prepare from #{proc}")
 
@@ -240,6 +326,7 @@ defmodule Paxos do
           state
       end
     
+    # Handles a nack
     {:nack, inst, ballot} ->
       log("#{state.name} - nack #{inspect(inst)} #{inspect(ballot)}")
 
@@ -266,6 +353,7 @@ defmodule Paxos do
           state
       end
 
+    # Handles an abort
     {:rb_deliver, _proc, {:abort, inst, ballot}} ->
       cond do
         has_finished(state, inst) ->
@@ -281,6 +369,8 @@ defmodule Paxos do
           state
       end
 
+    # Handles a prepared
+    # Sends out accept when a quorum is met
     {:prepared, inst, ballot, accepted_ballot, accepted_value} ->
       log(
         "#{state.name} - prepared #{inspect(inst)} #{inspect(ballot)} #{inspect(accepted_ballot)} #{inspect(accepted_value)}"
@@ -307,6 +397,7 @@ defmodule Paxos do
           state
       end
 
+    # Handles a accept
     {:rb_deliver, proc, {:accept, inst, ballot, value}} ->
       cond do
         has_finished(state, inst) ->
@@ -334,6 +425,8 @@ defmodule Paxos do
           end
       end
 
+    # Handles a accept
+    # Sends out accept when a decide when a quoeom is met
     {:accepted, inst, ballot} ->
       log("#{state.name} - accepted #{inspect(inst)} #{inspect(ballot)}")
 
@@ -352,6 +445,7 @@ defmodule Paxos do
           state
       end
     
+    # handles a parent request to get a value
     {:get_value, inst, pid_to_inform} ->
       # log("#{state.name} get_value")
       if  has_finished(state, inst, true) do
@@ -359,6 +453,8 @@ defmodule Paxos do
       end
       state
     
+    # Adds a decision made by a leader to the list of decisions
+    # and informs the parent of the decision
     {:rb_deliver, _, {:decide, inst, value}} ->
       log("#{state.name} - decided #{inspect(inst)} #{inspect(value)}")
 
@@ -375,13 +471,12 @@ defmodule Paxos do
       end
   end
 
-  #
-  # Puts process in the preapre state
-  #
-
-  def prepare(state, _) when state.leader != state.name, do: state
-
-  def prepare(state, inst) do
+  @doc """
+    Does the logic to decide when to send the prepare messages
+    Also sets the state nessesary to run the proposal
+  """
+  defp prepare(state, _) when state.leader != state.name, do: state
+  defp prepare(state, inst) do
     cond do
       state.instmap[inst] == nil ->
         state
@@ -413,12 +508,11 @@ defmodule Paxos do
     end
   end
 
-  #
-  # Process the prepared responses
-  #
-  def prepared(state, _) when state.leader != state.name, do: state
-
-  def prepared(state, inst) do
+  @doc """
+    Processes the prepared messages and when a quorum is met the accept messages are send
+  """
+  defp prepared(state, _) when state.leader != state.name, do: state
+  defp prepared(state, inst) do
     if length(state.instmap[inst].prepared_values) >= floor(length(state.processes) / 2) + 1 and
          not state.instmap[inst].has_sent_accept do
       {_, a_val} =
@@ -461,13 +555,12 @@ defmodule Paxos do
     end
   end
 
-  #
-  # Process the accepted responses
-  #
-  def accepted(state, _) when state.leader != state.name, do: state
-
-  def accepted(state, inst) do
-    if state.instmap[inst].accepted >= floor(length(state.processes) / 2) + 1 do
+  @doc """
+    Processes the accepted messages and when a qurum is met decide on the value
+  """
+  defp accepted(state, _) when state.leader != state.name, do: state
+  defp accepted(state, inst) do
+    or_state state.instmap[inst].accepted >= floor(length(state.processes) / 2) + 1 do
       value = state.instmap[inst].ballot_value
 
       if state.instmap[inst].action == :kill_before_decision do
@@ -489,69 +582,76 @@ defmodule Paxos do
         | decided: Map.put(state.decided, inst, value),
           instmap: Map.delete(state.instmap, inst)
       }
-    else
-      state
     end
   end
 
+  #######################
+  #      Interface      #
+  #######################
+  
+  @doc """
+    Send the propose message to the paxos replica and waits for a response from the correct instance
+  """
   def propose(pid, inst, value, t, action \\ nil) do
     send(pid, {:propose, inst, value, self(), action})
 
-    propose_loop({inst, t})
+    propose_loop(inst, t)
   end
   
-  def propose_loop(input) do
-    {_, t} = input
+  @doc """
+    Waits the right message from the paxos replica
+  """
+  defp propose_loop(inst, t) do
     receive do
-      {:timeout, inst} ->
-        check_and_apply({:timeout}, inst, input, &propose_loop/1)
-
-      {:abort, inst} ->
-        check_and_apply({:abort}, inst, input, &propose_loop/1)
-
-      {:decision, inst, d} ->
-        check_and_apply({:decision, d}, inst, input, &propose_loop/1)
-
+      {:timeout, ^inst} -> {:timeout}
+      {:abort, ^inst} -> {:abort}
+      {:decision, ^inst, d} -> {:decision, d}
       x ->
         Process.send_after(self(), x, 500)
-        propose_loop(input)
+        propose_loop(inst, t)
     after
       t -> {:timeout}
     end
   end
   
+  @doc """
+    Sends the :get_value message to the paxos replica
+  """
   def get_decision(pid, inst, t) do
     send(pid, {:get_value, inst, self()})
-    get_decision_loop({inst, t})
+    get_decision_loop(inst, t)
   end
   
-  def get_decision_loop(input) do
-    {_, t} = input
+  @doc """
+    Sends waits for the right message from the paxos replica
+  """
+  defp get_decision_loop(inst, t) do
     receive do
-      {:get_value_res, inst, v} ->
-        check_and_apply(v, inst, input, &get_decision_loop/1)
+      {:get_value_res, ^inst, v} ->
+        v
 
       x ->
         Process.send_after(self(), x, 500)
-        get_decision_loop(input)
+        get_decision_loop(inst, t)
     after
       t -> nil
     end
   end
-
-  def check_and_apply(v, inst, input, fun) do
-    {inInst, _} = input
-    if inst == inInst do
-      v
-    else
-      fun.(input)
-    end
-  end
 end
 
 defmodule Ballot do
+  @moduledoc """
+    A set of a helper functions to manage ballots
+  """
+
+  @doc """
+    Create a new ballot
+  """
   def init(name, number \\ 0), do:  {name, number}
   
+  @doc """
+    Increase the ballot number
+  """
   def inc(b, name \\ nil) do
     {old_name, number} = b
 
@@ -561,6 +661,9 @@ defmodule Ballot do
     }
   end
   
+  @doc """
+    Compare the name of 2 processes and select the lowest one
+  """
   defp lexicographical_compare(a, b) do
     cond do
       a == b -> 0
@@ -569,7 +672,9 @@ defmodule Ballot do
     end
   end
 
-
+  @doc """
+    Callculate the difference between w ballots
+  """
   defp diff({name1, number1}, {name2, number2}) do
     diff = number1 - number2
     if diff == 0 do
@@ -579,24 +684,41 @@ defmodule Ballot do
     end
   end
   
+  @doc """
+    Compare 2 ballots
+  """
   def compare(b1, operator, b2), do:  operator.(diff(b1, b2), 0)
 end
 
 defmodule EagerReliableBroadcast do
+  @moduledoc """
+    This modules implents eager reiable broadcast with the optimization of removing the from the deliver list after hearing
+    the same number of echos as there is processes
+
+    emits {:rb_deliver, proc, message}
+  """
+
   require Utils
   import Utils
   
-  def get_non_rb_name(name) do
+  @doc """
+    Removes _br from the name of a process
+  """
+  defp get_non_rb_name(name) do
     String.to_atom(String.replace(Atom.to_string(name), "_rb", ""))
   end
   
+  @doc """
+    Starts the Eager reliable process and registers it with a name and links the process with the parent process
+  """
   def start(name, processes) do
     pid = spawn(EagerReliableBroadcast, :init, [name, processes])
     register_name(alter_name(name, "_rb"), pid)
   end
 
-  # Init event must be the first
-  # one after the component is created
+  @doc """
+    Sets state and calls the run function
+  """
   def init(parent, processes) do
     state = %{
       name: alter_name(parent, "_rb"),
@@ -639,17 +761,24 @@ defmodule EagerReliableBroadcast do
   #############
   # Interface #
   #############
+  @doc """
+    Sends a a broadcast request to the eager reliable broadcast replica
+  """
   def broadcast(name, m), do: safecast(alter_name(name, "_rb"), {:broadcast, m})
 end
 
-#
-# Emits {:ele_trust, proc }
-#
-
 defmodule EventualLeaderElector do
+  @moduledoc """
+    This modules implents eventual leader elector
+
+    emits {:ele_leader, proc}
+  """
   require Utils
   import Utils
   
+  @doc """
+    Initializes the leader elector process and registers is under name_ele and links it with the parent process
+  """
   def start(name, processes) do
     new_name = alter_name(name, "_ele")
     pid = spawn(EventualLeaderElector, :init, [new_name, name, processes])
@@ -657,8 +786,9 @@ defmodule EventualLeaderElector do
     register_name(new_name, pid)
   end
 
-  # Init event must be the first
-  # one after the component is created
+  @doc """
+    Initializes state and starts the run function
+  """
   def init(name, parent, processes) do
     processes = Enum.map(processes, fn name -> alter_name(name, "_ele") end)
 
@@ -675,6 +805,9 @@ defmodule EventualLeaderElector do
     run(request_heartbeats(state))
   end
   
+  @doc """
+    Clears heard_back and updates the sequence number and then sends a request for heartbeats to all proccesses
+  """
   def request_heartbeats(state) do
     state = %{state | heard_back: MapSet.new(), seq: state.seq + 1}
     beb_broadcast({:heartbeat_request, state.name, state.seq}, state.processes)
@@ -684,15 +817,18 @@ defmodule EventualLeaderElector do
   end
 
   runfn do
+    # Answer to a heartbeat_request
     {:heartbeat_request, name, seq} ->
       safecast(name, {:heartbeat, state.parent, seq})
       state
     
+    # Update heard_back with this name
     {:heartbeat, name, seq} ->
       or_state seq == state.seq do
         %{state | heard_back: MapSet.put(state.heard_back, name)}
       end
     
+    # One time out check the heard_back and send if a new leader is elected inform the parent
     {:timeout} ->
       state = or_state MapSet.size(state.heard_back) >= floor(length(state.processes)/2) + 1 do
         to_trust = Enum.at(Enum.sort(MapSet.to_list(state.heard_back)), 0)

lib/server.ex

@@ -1,6 +1,13 @@
 defmodule ServerMacros do
+  @moduledoc """
+    This module defines some helper macros that are used within the server macro
+  """
   
-  def create_create_loop(name, do: match_exp, else: process_exp) do
+  @doc """
+    This macro creates a wait loop to wait for the messages that are receive match what is inside the
+    loop
+  """
+  defmacro create_loop(name, do: match_exp) do
     function_name = :"#{name}_loop"
 
     ast1 = quote do
@@ -19,7 +26,6 @@ defmodule ServerMacros do
     quote do
       defp unquote(function_name)(v, t) do
         var!(v) = v
-        unquote(process_exp)
         receive do
           unquote(ast3)
         after
@@ -29,18 +35,10 @@ defmodule ServerMacros do
     end
   end
   
-  def create_create_loop(name, do: exp, else: else_exp) do
-    create_create_loop(name, do: exp, else: else_exp)
-  end
-
-  def create_create_loop(name, do: exp) do
-    create_create_loop(name, do: exp, else: nil)
-  end
-
-  defmacro create_loop(name, clauses) do
-  	create_create_loop(name, clauses)
-  end
-
+  @doc """
+    this function tries to propose and on failure it calls the else block and
+    on success tries to match with the expressions on the do block
+  """
   defmacro try_propose(val, do: ready, else: recal_do) do
     ast1 = quote do
       {:timeout} ->  unquote(recal_do)
@@ -68,6 +66,9 @@ defmodule ServerMacros do
 end
 
 defmodule Server do
+  @moduledoc """
+    Contains the to run the server Code
+  """
   require ServerMacros
   import ServerMacros
   require Utils
@@ -75,13 +76,19 @@ defmodule Server do
 
   create_log 2
   
+  @doc """
+    Contains the start code for the server
+  """
   def start(name, participants) do
-    log("starting server")
+    log("#{name} Starting server")
 
     pid = spawn(Server, :init, [name, participants])
     register_name(name, pid, false)
   end
   
+  @doc """
+    Initializes the state and starts the paxos inspect and then it calls the run fn
+  """
   def init(name, participants) do
     paxos = Paxos.start(alter_name(name, "_paxos"), Enum.map(participants, fn name -> alter_name(name, "_paxos") end), true)
     state = %{
@@ -97,19 +104,26 @@ defmodule Server do
 
   runfn do
     {:start_game, participants, pid_to_inform} ->
+      or_state is_list(participants) do
         {state, game_id} = try_to_create_game(state, participants)
         state = set_modifed(state, game_id)
         safecast(pid_to_inform, {:start_game_ans, game_id})
         state
+      end
 
     {:get_game_state, game_id, pid_to_inform} ->
-      get_game_state(state, game_id, pid_to_inform)
+      state = get_game_state(state, game_id, pid_to_inform)
+      set_modifed(state, game_id)
+
 
     {:make_move, game_id, move, pid_to_inform} ->
       try_to_play_checks(state, game_id, move, pid_to_inform)
 
   end
   
+  @doc """
+    Checks if the user can play the move before starting the requesting the user to play
+  """
   defp try_to_play_checks(state, game_id, move, pid_to_inform, repeat \\ false) do
     cond do
       state.games[game_id] == :not_playing_in_game ->
@@ -136,15 +150,33 @@ defmodule Server do
           game.modified ->
             safecast(pid_to_inform, {:make_move, game_id, :player_moved_before, game.game_state, game.hand})
             set_modifed(state, game_id)
+          true ->
+            cond do
+              not is_number(move) ->
+                safecast(pid_to_inform, {:make_move, game_id, :invalid_move})
+                state
+              move >= length(game.game_state) ->
+                safecast(pid_to_inform, {:make_move, game_id, :invalid_move})
+                state
               true ->
                 try_to_play(state, game_id, move, pid_to_inform)
             end
         end
     end
+  end
   
+  @doc """
+    Tries to propose to paxos the game action
+  """
   defp try_to_play(state, game_id, move, pid_to_inform) do
     name = state.name
-    new_hand = get_hand_for_game_state(state.games[game_id].game_state)
+    
+    new_hand = if state.games[game_id].hand[state.name] == :- do
+      Enum.at(state.games[game_id].game_state, move)
+    else
+      get_hand_for_game_state(state.games[game_id].game_state)
+    end
+
     try_propose {:make_move, game_id, name, move, new_hand}
     do
       {:decision, {:make_move, ^game_id, ^name, ^move, ^new_hand}} ->
@@ -177,6 +209,9 @@ defmodule Server do
     end
   end
   
+  @doc """
+    Get the most recent game_state and return it to the player
+  """
   defp get_game_state(state, game_id, pid_to_inform, repeat \\ false) do
     cond do 
       state.games[game_id] == :not_playing_in_game ->
@@ -205,11 +240,16 @@ defmodule Server do
     end
   end
   
+  @doc """
+    This generates a new hand based on the current game state
+  """
   defp get_hand_for_game_state(game_state) do
     r1 = Enum.random(0..100)
-    if r1 <= 10 do
-      :+
-    else
+    cond do 
+      r1 <= 1 -> :b
+      r1 <= 5 -> :-
+      r1 <= 20 -> :+
+      true ->
         mx = game_state |> Enum.filter(fn m -> m != :+ end) |> Enum.max()
         mn = max(mx - 20, 1)
         mx = max(mx - 2, 4)
@@ -217,6 +257,9 @@ defmodule Server do
     end 
   end
   
+  @doc """
+    This tries to create a game by sending the create message to paxos
+  """
   defp try_to_create_game(state, participants) do
     game_ids = Map.keys(state.games)
     latest = Enum.at(Enum.sort(game_ids), length(game_ids) - 1)
@@ -238,7 +281,9 @@ defmodule Server do
   #
   # Utils
   #
-  
+  @doc """
+    Checks if a game has been finished
+  """
   defp is_finished(state, game) do
     case state.games[game] do
       {:finished, _} -> true
@@ -246,6 +291,9 @@ defmodule Server do
     end
   end
   
+  @doc """
+    Gets up to the most recent instance
+  """
   defp qurey_status(state) do
     v = Paxos.get_decision(state.paxos, state.instance, 100)
     or_state v != nil do
@@ -254,8 +302,11 @@ defmodule Server do
     end
   end
   
+  @doc """
+    Sets the modified flag
+  """
   defp set_modifed(state, game, val \\ false) do
-    or_state not is_finished(state, game) do
+    or_state not is_finished(state, game) and state.games[game] != :not_playing_in_game and state.games[game] != nil do
       %{state | games: Map.put(state.games, game, %{state.games[game] | modified: val})}
     end
   end
@@ -289,6 +340,7 @@ defmodule Server do
       if b == a do
         case b do
           :+ -> simplify_game_state_pluses(tl, indexed_game_state)
+          :b -> simplify_game_state_pluses(tl, indexed_game_state)
           n ->
             list =
               indexed_game_state |>
@@ -310,6 +362,33 @@ defmodule Server do
     end
   end
 
+  defp simplify_game_state_pluses([{:b, i} | tl], indexed_game_state) do
+    before_i = get_index(indexed_game_state, i, -1)
+    after_i = get_index(indexed_game_state, i, 1)
+
+    if before_i != after_i do 
+      {b, b_i} = Enum.at(indexed_game_state, before_i)
+      {a, a_i} = Enum.at(indexed_game_state, after_i)
+
+      a = if is_atom(a) do 1 else a end
+      b = if is_atom(b) do 1 else b end
+
+      list =
+        indexed_game_state |>
+        Enum.map(fn {x, ti} -> if ti == i, do: {{:merged, trunc(:math.floor((a + b) / 2))}, i}, else: {x, ti} end) |>
+        Enum.filter(fn {x, ti} -> cond do
+            b_i == ti -> false
+            a_i == ti -> false
+            true -> true
+          end
+        end) |>
+        reindex()
+      {true, expand_merge(list)}
+    else
+        simplify_game_state_pluses(tl, indexed_game_state)
+    end
+  end
+
   defp is_merged(item) do
     case item do
       {:merged, _} -> true
@@ -332,7 +411,7 @@ defmodule Server do
           {:merged, _} -> indexed_game_state
           _ ->
             indexed_game_state |>
-              Enum.map(fn {x, ti} -> if ti == i, do: {{:merged, n + 1}, i}, else: {x, ti} end) |>
+              Enum.map(fn {x, ti} -> if ti == i, do: {{:merged, max(n, a) + 1}, i}, else: {x, ti} end) |>
               Enum.filter(fn {x, ti} -> cond do
                   b_i == ti -> false
                   a_i == ti -> false
@@ -362,24 +441,16 @@ defmodule Server do
 
   defp remove_merged([], rec, _), do: rec
 
-  defp remove_merged([{:merged, n} | tl], rec, add) do
-    if add do
-      remove_merged(tl, rec ++ [n], false)
-    else
-      remove_merged(tl, rec, false)
-    end
-  end
+  defp remove_merged([{:merged, n} | tl], rec, add),
+    do: if add, do: remove_merged(tl, rec ++ [n], false),
+      else: remove_merged(tl, rec, false)
 
   defp remove_merged([n | tl], rec, add), do: 
     remove_merged(tl, rec ++ [n], add)
 
-  defp remove_merged(list) do
-    log("#{inspect(list)}")
-    remove_merged(list, [], true)
-  end
+  defp remove_merged(list), do: remove_merged(list, [], true)
 
   defp simplify_game_state(game_state) do
-    log("game_state: #{inspect(game_state)}")
     indexed_game_state = 
       game_state |>
       reindex(false)
@@ -388,13 +459,12 @@ defmodule Server do
       indexed_game_state |>
       Enum.filter(fn x -> case x do 
         {:+, _} -> true
+        {:b, _} -> true
         _ -> false
         end
       end) |>
       simplify_game_state_pluses(indexed_game_state)
 
-    log("game_state2: #{inspect(indexed_game_state)}")
-
     if repeat do
       indexed_game_state |> 
         Enum.map(fn {v, _} -> v end) |>
@@ -414,14 +484,23 @@ defmodule Server do
         %{state | instance: state.instance + 1 }
       game ->
         game_state = game.game_state
+        game_state = if game.hand[player_name] == :- do
+          List.delete_at(game_state, pos_move)
+        else
           {b, e} = Enum.split(game_state, pos_move)
-        game_state = b ++ [ game.hand[player_name] ] ++ e
+          b ++ [ game.hand[player_name] ] ++ e
+        end
         game_state = simplify_game_state(game_state)
         hand = Map.put(game.hand, player_name, new_hand)
-        game = %{game| hand: hand, game_state: game_state }
+        game = %{game| hand: hand, game_state: game_state, modified: true }
 
-        if length(game.game_state) > 15 do
-          %{state| games: Map.put(state.games, game_id, {:finished, Enum.sum(game.game_state)}), instance: state.instance + 1}
+        if length(game.game_state) > 16 do
+          %{state| games: Map.put(state.games, game_id, {
+            :finished, 
+            game.game_state |> 
+              Enum.filter(fn x -> not is_atom(x) end) |> 
+              Enum.sum()}), instance: state.instance + 1
+          }
         else
           %{state| games: Map.put(state.games, game_id, game), instance: state.instance + 1}
         end
@@ -468,18 +547,15 @@ defmodule Server do
   end
 
   create_loop :get_game_state do
-    {:game_state, ^v, :not_playing} ->
-      log("Not Playing in that game")
-      {:not_playing}
-    {:game_state, ^v, game_state, hand} ->
-      log("Got game state, #{inspect(game_state)}, hand: #{inspect(hand)}")
-      {:state, game_state, hand}
     {:game_state, ^v, :not_playing} ->
       log("Not Playing in that game")
       {:not_playing}
     {:game_state, ^v, :game_finished, score} ->
       log("Game finsihed, #{score}")
       {:game_finished, score}
+    {:game_state, ^v, game_state, hand} ->
+      log("Got game state, #{inspect(game_state)}, hand: #{inspect(hand)}")
+      {:state, game_state, hand}
     {:game_state, ^v, :game_does_not_exist} ->
       log("Got game does not exist")
       {:not_exists}
@@ -503,6 +579,9 @@ defmodule Server do
     {:make_move, ^v, :player_moved_before, game_state, hand} ->
       log("Player moved_before, #{inspect(game_state)} #{inspect(hand)}")
       {:player_moved_before, game_state, hand}
+    {:make_move, ^v, :invalid_move} ->
+      log("Invalid Move")
+      {:invalid_move}
     {:make_move, ^v, game_state, hand} ->
       log("Got game state, #{inspect(game_state)}, hand: #{inspect(hand)}")
       {:state, game_state, hand}
@@ -534,87 +613,234 @@ defmodule Client do
   create_log 3
   
   def play_game(process, game_id) do
+    game = Server.get_game_state(process, game_id)
 
+    cont = case game do
+      :timeout ->
+        log("Could to not comunicate with the server")
+        true
+      {:not_exists} -> 
+        log("Game does not exist")
+        true
+      {:not_playing} ->
+        log("Not Playing in that game")
+        true
+      {:game_finished, score} ->
+        log("Game finsihed, #{score}")
+        true
+      {:game_does_not_exist} ->
+        log("Got game does not exist")
+        true
+      {:state, game_state, hand} ->
+        game_state |> 
+          to_name() |>
+          interpolate() |>
+          fill() |>
+          printpt(to_name(hand))
+        false
+    end
+
+    if not cont do
+      to_play = IO.gets("Type the number you want to play or q to exit: ")
+      to_play = to_play |> String.trim("\"") |> String.trim()
+
+      case to_play do
+        "q" ->
+          log("Bye Bye")
+        v ->
+          try do
+            {n, _} = Integer.parse(v)
+
+            res = Server.make_move(process, game_id, n)
+            case res do
+              :timeout ->
+                log("Could to not comunicate with the server")
+              {:not_exists} -> log("Game does not exist")
+              {:not_playing} -> log("Not Playing in that game")
+              {:game_finished, score} -> log("Game finsihed, #{score}")
+              {:game_does_not_exist} -> log("Got game does not exist")
+              {:player_moved_before, _, _} ->
+                log("Player Moved before you did please check the map and try again")
+                play_game(process, game_id)
+              {:invalid_move} -> raise "Invalid Move"
+              {:state, _, _} -> play_game(process, game_id)
+            end
+          rescue
+            _ -> 
+              log("Please provide a valid number")
+              play_game(process, game_id)
+          end
+      end
+    end
+  end
+
+
+  def control_game(process, game_id) do
+    to_play = IO.gets("Type the number you want to play or q to exit: ")
+    to_play = to_play |> String.trim("\"") |> String.trim()
+
+    case to_play do
+      "q" ->
+        log("Bye Bye")
+      v ->
+        try do
+          {n, _} = Integer.parse(v)
+
+          res = Server.make_move(process, game_id, n)
+          case res do
+            :timeout -> log("Could to not comunicate with the server")
+            {:not_exists} -> control_game(process, game_id)
+            {:not_playing} -> control_game(process, game_id)
+            {:game_finished, _} -> control_game(process, game_id)
+            {:player_moved_before, _, _} ->
+              log("Player Moved before you did please check the map and try again")
+              control_game(process, game_id)
+            {:invalid_move} -> raise "Invalid Move"
+            {:state, _, _} -> control_game(process, game_id)
+          end
+        rescue
+          _ -> 
+            log("Please provide a valid number")
+            control_game(process, game_id)
+        end
+    end
+  end
+
+
+  def display_game(process, game_id, temp_game \\ [], temp_hand \\ []) do
+    game = Server.get_game_state(process, game_id)
+
+    cont = case game do
+      :timeout -> log("Could to not comunicate with the server")
+      {:not_exists} -> log("Game does not exist")
+      {:not_playing} -> log("Not Playing in that game")
+      {:game_finished, score} -> log("Game finsihed, #{score}")
+      {:game_does_not_exist} -> log("Got game does not exist")
+      {:state, game_state, hand} ->
+        if temp_game != game_state or temp_hand != hand do
+          # IO.ANSI.clear()
+          game_state |> 
+            to_name() |>
+            interpolate() |>
+            fill() |>
+            printpt(to_name(hand))
+          Process.sleep(1000)
+          display_game(process, game_id, game_state, hand)
+        else
+          Process.sleep(1000)
+          display_game(process, game_id, temp_game, temp_hand)
+        end
+    end
   end
 
   def to_name(list) when is_list(list), do: list |> Enum.map(fn x -> to_name(x) end)
+  def to_name(atom) when atom == :+, do: IO.ANSI.color_background(9) <> IO.ANSI.color(15) <> " + " <> IO.ANSI.reset()
+  def to_name(atom) when atom == :-, do: IO.ANSI.color_background(21) <> IO.ANSI.color(15) <> " - " <> IO.ANSI.reset()
+  def to_name(atom) when atom == :b, do: IO.ANSI.color_background(232) <> IO.ANSI.color(15) <> " b " <> IO.ANSI.reset()
   def to_name(atom) when is_atom(atom), do: atom
   def to_name(i) do
-    [ "H", "He", "Li", "Be", "B", "C", "N", "O", "F", "Ne", "Na", "Mg", "Al", "Si", "P", "S", "Cl", "Ar", "K", "Ca", "Sc", "Ti", "V", "Cr", "Mn", "Fe", "Co", "Ni", "Cu", "Zn", "Ga", "Ge", "As", "Se", "Br", "Kr", "Rb", "Sr", "Y", "Zr", "Nb", "Mo", "Tc", "Ru", "Rh", "Pd", "Ag", "Cd", "In", "Sn", "Sb", "Te", "I", "Xe", "Cs", "Ba", "La", "Ce", "Pr", "Nd", "Pm", "Sm", "Eu", "Gd", "Tb", "Dy", "Ho", "Er", "Tm", "Yb", "Lu", "Hf", "Ta", "W", "Re", "Os", "Ir", "Pt", "Au", "Hg", "Tl", "Pb", "Bi", "Po", "At", "Rn", "Fr", "Ra", "Ac", "Th", "Pa", "U", "Np", "Pu", "Am", "Cm", "Bk", "Cf", "Es", "Fm", "Md", "No", "Lr", "Rf", "Db", "Sg", "Bh", "Hs", "Mt", "Ds", "Rg", "Cn", "Nh", "Fl", "Mc", "Lv", "Ts", "Og" ] |>
-    Enum.at(i - 1)
+    letter = [ "H", "He", "Li", "Be", "B", "C", "N", "O", "F", "Ne", "Na", "Mg", "Al", "Si", "P", "S", "Cl", "Ar", "K", "Ca", "Sc", "Ti", "V", "Cr", "Mn", "Fe", "Co", "Ni", "Cu", "Zn", "Ga", "Ge", "As", "Se", "Br", "Kr", "Rb", "Sr", "Y", "Zr", "Nb", "Mo", "Tc", "Ru", "Rh", "Pd", "Ag", "Cd", "In", "Sn", "Sb", "Te", "I", "Xe", "Cs", "Ba", "La", "Ce", "Pr", "Nd", "Pm", "Sm", "Eu", "Gd", "Tb", "Dy", "Ho", "Er", "Tm", "Yb", "Lu", "Hf", "Ta", "W", "Re", "Os", "Ir", "Pt", "Au", "Hg", "Tl", "Pb", "Bi", "Po", "At", "Rn", "Fr", "Ra", "Ac", "Th", "Pa", "U", "Np", "Pu", "Am", "Cm", "Bk", "Cf", "Es", "Fm", "Md", "No", "Lr", "Rf", "Db", "Sg", "Bh", "Hs", "Mt", "Ds", "Rg", "Cn", "Nh", "Fl", "Mc", "Lv", "Ts", "Og" ] |> Enum.at(i - 1)
+    color = [46,45,138,19,11,140,8,47,57,159,72,48,55,35,251,188,107,110,21,11,156,134,128,179,140,234,14,90,206,7,249,209,253,123,192,165,234,136,198,208,43,34,215,127,23,250,177,237,124,202,229,
+63,206,220,224,109,202,113,253,7,243,26,160,65,39,112,57,75, 252,82,213,186,68,243,134,100,226,48,90,134,208,102,25,106,72, 242,26,59,166,26,187,54,194,165,97,219,186,130,7,154,233,85, 130,67,43,200,90,60,148,49,161,110,247,116,223,159,132,132] |> Enum.at(i - 1) |> IO.ANSI.color()
+    color <> String.pad_leading("#{letter}", 3, "  ") <> IO.ANSI.reset()
   end
 
   def interpolate(list) do
     [list, 0..length(list) - 1] |> 
       Enum.zip() |> 
-      Enum.reduce([], fn {v, i}, acc -> acc ++ [i, v] end) |>
-      Enum.map(fn x -> String.pad_leading("#{x}", 2, "  ") end)
+      Enum.reduce([], fn {v, i}, acc -> acc ++ [String.pad_leading("#{i}", 3, "  "), v] end)
   end
 
-  def printpt(game_state) do
-    rad = 8;
-    printpt1(game_state, 0, rad)
+  def grow_empty_list(t, i, acc) when i == 0, do: t ++ acc
+  def grow_empty_list([], i, acc), do: grow_empty_list(acc, i, [])
+  def grow_empty_list([h | tl], i, acc), do:
+    grow_empty_list(tl, i - 1, acc ++ [ h ++ ["   "] ])
+
+  def fill(list) do
+    to_fill = 32 -  length(list)
+    to_add = grow_empty_list(Enum.map(list, fn _ -> [] end), to_fill, [])
+    fill(list, to_add, [])
   end
 
-  defp count_char(str, char) do
-    String.split(str, "") |> Enum.reduce(0, fn x, acc -> if x == char do acc + 1 else acc end end)
+  def fill([], _, acc), do: acc
+  def fill([hd | tail], [add_hd | add_tail], acc) do
+    fill(tail, add_tail ,acc ++ [hd] ++ add_hd)
   end
 
-  def printpt1(_, i, rad) when i > rad * 2, do: nil
-  def printpt1(game_state, i, rad) do
-    res = printpt2(game_state, i, -5, rad, "")
-
-    "                   xxx                       \n"
-    "                xxx   yyy                  \n"
-    "             xxx         yyy              \n"
-    "          xxx               yyy           \n"
-    "     xxx                         yyy         \n"
-    "    xxx                           yyy        \n"
-    "   xxx                             yyy       \n"
-    "   xxx                             yyy       \n"
-    "   xxx                             yyy       \n"
-    "    xxx                           yyy        \n"
-    "    xxx                           yyy        \n"
-    "     xxx                         yyy         \n"
-    "      xxx                       yyy          \n"
-    "        xxx                   yyy            \n"
-    "          xxx               yyy              \n"
-    "                   xxx                       \n"
-
-
-
-    
-    if i != 15 do
+  def printpt(game_state, hand), do: printpt(game_state, hand, 0)
+  def printpt(_, _,  i) when i > 16, do: nil
+  def printpt(game_state, hand, i) do
     res = case i do
       0 ->
-          x = count_char(res, "x")
-          log("#{x}")
-          #TODO
-          res
+        "                       xxx             \n" |>
+          String.replace("xxx", Enum.at(game_state, 1))
+      1 ->
+        "                  xxx       yyy           \n" |>
+          String.replace("xxx", Enum.at(game_state, 0)) |>
+          String.replace("yyy", Enum.at(game_state, 2))
+      2 ->
+        "              xxx               yyy        \n" |>
+          String.replace("xxx", Enum.at(game_state, 31)) |>
+          String.replace("yyy", Enum.at(game_state, 3))
+      3 ->
+        "            xxx                   yyy       \n" |>
+          String.replace("xxx", Enum.at(game_state, 30)) |>
+          String.replace("yyy", Enum.at(game_state, 4))
+      4 ->
+        "          xxx                       yyy       \n" |>
+          String.replace("xxx", Enum.at(game_state, 29)) |>
+          String.replace("yyy", Enum.at(game_state, 5))
+      5 ->
+        "         xxx                         yyy      \n" |>
+          String.replace("xxx", Enum.at(game_state, 28)) |>
+          String.replace("yyy", Enum.at(game_state, 6))
+      6 ->
+        "       xxx                             yyy      \n" |>
+          String.replace("xxx", Enum.at(game_state, 27)) |>
+          String.replace("yyy", Enum.at(game_state, 7))
+      7 ->
+        "       xxx                             yyy      \n" |>
+          String.replace("xxx", Enum.at(game_state, 26)) |>
+          String.replace("yyy", Enum.at(game_state, 8))
+      8 ->
+        "       xxx             zzz             yyy      \n" |>
+          String.replace("xxx", Enum.at(game_state, 25)) |>
+          String.replace("yyy", Enum.at(game_state, 9)) |>
+          String.replace("zzz", hand)
+      9 ->
+        "       xxx                             yyy      \n" |>
+          String.replace("xxx", Enum.at(game_state, 24)) |>
+          String.replace("yyy", Enum.at(game_state, 10))
+      10 ->
+        "        xxx                           yyy       \n" |>
+          String.replace("xxx", Enum.at(game_state, 23)) |>
+          String.replace("yyy", Enum.at(game_state, 11))
+      11 ->
+        "         xxx                         yyy       \n" |>
+          String.replace("xxx", Enum.at(game_state, 22)) |>
+          String.replace("yyy", Enum.at(game_state, 12))
+      12 ->
+        "          xxx                       yyy        \n" |>
+          String.replace("xxx", Enum.at(game_state, 21)) |>
+          String.replace("yyy", Enum.at(game_state, 13))
+      13 ->
+        "            xxx                   yyy        \n" |>
+          String.replace("xxx", Enum.at(game_state, 20)) |>
+          String.replace("yyy", Enum.at(game_state, 14))
+      14 ->
+        "              xxx               yyy         \n" |>
+          String.replace("xxx", Enum.at(game_state, 19)) |>
+          String.replace("yyy", Enum.at(game_state, 15))
+      15 ->
+        "                  xxx       yyy           \n" |>
+          String.replace("xxx", Enum.at(game_state, 18)) |>
+          String.replace("yyy", Enum.at(game_state, 16))
       16 ->
-          #TODO
-          res
-        v ->
-          #TODO
-          res
-      end
-      IO.write("   #{res}   \n")
-    end
-    printpt1(game_state, i + 1, rad)
+        "                       xxx        \n" |>
+          String.replace("xxx", Enum.at(game_state, 17))
     end
 
-  def printpt2(_, _, j, rad, res) when j > rad * 4 + 10, do: res
-  def printpt2(game_state, i, j, rad, res) do
-    dist = :math.sqrt((i - rad)*(i - rad) + (j / 2 - rad)*(j / 2 - rad));
-    v = if (dist > rad - 1 and dist < rad + 1) do
-      case i do
-        0 -> "x"
-        16 -> "x"
-        _ -> if j < rad * 2 do "x" else "y" end
-      end
-    else
-      " "
-    end
-    printpt2(game_state, i, j + 1, rad, res <> v)
+    IO.write("#{res}")
+    printpt(game_state, hand, i + 1)
   end
 end

notes

@@ -0,0 +1,191 @@
+procs = Enum.to_list(1..3) |> Enum.map(fn m -> :"p#{m}")
+pids = Enum.map(procs, fn p -> ShopServer.start(p, procs))
+pids |> Enum.map(fn p -> Process.exit(p, :kill) end)
+
+
+
+max = 100
+
+1..max |> Enum.to_list() |> Enum.reduce(%{}, fn n, acc -> Map.put(acc, n, :not_reseverd) end) |>
+
+
+
+
+
+                                                                                                
+                                                                                                
+                                                                                                
+                                    "      #      "                                                           
+                                    "     #1#     "                                                             
+                                    "      #      "                                                           
+                                    "   #     #   "                                                            
+                                    "  #0#   #2#  "                                                                
+                                    "   #     #   "                
+                                    "      #      "         
+                                    "     #4#     "          
+                                    "      #      "                                                            
+                                                                         
+                                                                         
+                            "              #             "                 
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