From d39a74930ec054628f8c65d33ef797fdea6f44ce Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Sat, 11 Nov 2023 21:23:38 -0600
Subject: add create_world()

---
 src/simulation/game.js      | 52 +++++++++++++++++++++++++++++++++++++++++++++
 src/simulation/game.test.js | 28 +++++++++++++++++++++++-
 src/util.js                 | 11 +++++++++-
 3 files changed, 89 insertions(+), 2 deletions(-)

diff --git a/src/simulation/game.js b/src/simulation/game.js
index 991d125..f0c4815 100644
--- a/src/simulation/game.js
+++ b/src/simulation/game.js
@@ -1,6 +1,13 @@
 'use strict';
 
 
+import { random_choice, apply } from '../util.js';
+import { senses } from './senses.js';
+import { actions } from './actions.js';
+import { lattice_rules } from './lattice_rules.js';
+import { validity } from './validity.js';
+
+
 function is_wall(size, x, y) {
   return (
     x === 0 || x === size-1 ||
@@ -44,3 +51,48 @@ export function setup_board(size) {
     }));
   return lattice;
 }
+
+
+export function create_world(size, teams) {
+  const lattice = setup_board(size);
+
+  const agents = teams.reduce(
+    (agents, team, team_num) => {
+      const team_cells = lattice.map((row, y) => row.map((cell, x) => [x, y, cell])).flat()
+        // only check cells with the right team
+        .filter(([x, y, cell]) => cell.type === 'empty' && cell.flags.team === team_num)
+      return agents.concat(team.reduce(
+        (acc, agent) => {
+          const available_cells = team_cells.filter(([x, y, cell]) => acc.reduce(
+            (occupied, a) => occupied && ((a.x !== x) || (a.y !== y)),
+            true
+          ))
+          const [x, y, ..._] = random_choice(available_cells);
+          const orientation = random_choice([ 'n', 'e', 's', 'w' ]);
+          return [...acc, {...agent, x, y, flags: { ...agent.flags, orientation } }];
+        },
+        []
+      ));
+    },
+    []
+  ).flat();
+
+  return { lattice, lattice_rules, agents, actions, senses, validity };
+};
+
+
+// team structure:
+// {
+//   agents
+//   genome
+// }
+
+
+//export function create_team(size, genome_size, n_internal) {
+//  const n_input = senses.reduce((acc, sense) => acc + sense.size, 0);
+//  const n_output = senses.reduce((acc, sense) => acc + sense.size, 0);
+//  const genome = apply(
+//    s => mut_genome_insert(
+//    ),
+//  );
+//}
diff --git a/src/simulation/game.test.js b/src/simulation/game.test.js
index ac65618..219dce6 100644
--- a/src/simulation/game.test.js
+++ b/src/simulation/game.test.js
@@ -1,6 +1,7 @@
 'use strict';
 
-import { setup_board } from './game.js';
+import { apply } from '../util.js';
+import { setup_board, create_world } from './game.js';
 
 
 test("set up boards correctly", () => {
@@ -31,3 +32,28 @@ test("set up boards correctly", () => {
     [ W, W, W, W, W, W, W, W, W, ],
   ]);
 });
+
+
+test("creating a world works correctly", () => {
+  const id = 0;
+  const agent = (id) => ({ id, net: `${id}`, state: `s${id}` });
+  const team1 = [agent(0), agent(1)];
+  const team2 = [agent(2), agent(3)];
+  const team3 = [agent(4), agent(5)];
+  const team4 = [agent(6), agent(7)];
+
+  const world = create_world(6, [team1, team2, team3, team4]);
+  const agent_cell = (agent) => {
+    const { x, y } = agent;
+    return world.lattice[y][x];
+  };
+
+  expect(agent_cell(world.agents[0])).toEqual({ type: 'empty', flags: { team: 0 } });
+  expect(agent_cell(world.agents[1])).toEqual({ type: 'empty', flags: { team: 0 } });
+  expect(agent_cell(world.agents[2])).toEqual({ type: 'empty', flags: { team: 1 } });
+  expect(agent_cell(world.agents[3])).toEqual({ type: 'empty', flags: { team: 1 } });
+  expect(agent_cell(world.agents[4])).toEqual({ type: 'empty', flags: { team: 2 } });
+  expect(agent_cell(world.agents[5])).toEqual({ type: 'empty', flags: { team: 2 } });
+  expect(agent_cell(world.agents[6])).toEqual({ type: 'empty', flags: { team: 3 } });
+  expect(agent_cell(world.agents[7])).toEqual({ type: 'empty', flags: { team: 3 } });
+});
diff --git a/src/util.js b/src/util.js
index 74233f4..ecae45e 100644
--- a/src/util.js
+++ b/src/util.js
@@ -10,7 +10,7 @@ export function create(obj, proto=Object.prototype) {
 };
 
 
-export function random_choice(collection, r) {
+export function random_choice(collection, r=Math.random()) {
   const idx = Math.floor(collection.length * r);
   return collection[idx];
 }
@@ -41,3 +41,12 @@ export function deepEqual(a, b, debug=false) {
     return a === b;
   }
 }
+
+
+export function apply(f, n, x0) {
+  if (n == 0) {
+    return x0;
+  } else {
+    return f(apply(f, n-1, x0));
+  }
+}
-- 
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