From 70f1c629a6e08e0f9c58707f0470e08c6ffeca34 Mon Sep 17 00:00:00 2001
From: Star Rauchenberger <fefferburbia@gmail.com>
Date: Tue, 2 May 2023 20:14:43 -0400
Subject: Added reachability checking (only no doors rn)

---
 tracker_state.cpp | 143 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 tracker_state.cpp

(limited to 'tracker_state.cpp')

diff --git a/tracker_state.cpp b/tracker_state.cpp
new file mode 100644
index 0000000..62e4612
--- /dev/null
+++ b/tracker_state.cpp
@@ -0,0 +1,143 @@
+#include "tracker_state.h"
+
+#include <list>
+#include <set>
+
+#include "ap_state.h"
+#include "game_data.h"
+
+bool IsDoorReachable_Helper(int door_id, const std::set<int>& reachable_rooms);
+
+bool IsPanelReachable_Helper(int panel_id,
+                             const std::set<int>& reachable_rooms) {
+  const Panel& panel_obj = GetGameData().GetPanel(panel_id);
+
+  if (!reachable_rooms.count(panel_obj.room)) {
+    return false;
+  }
+
+  for (int room_id : panel_obj.required_rooms) {
+    if (!reachable_rooms.count(room_id)) {
+      return false;
+    }
+  }
+
+  for (int door_id : panel_obj.required_doors) {
+    if (!IsDoorReachable_Helper(door_id, reachable_rooms)) {
+      return false;
+    }
+  }
+
+  if (GetAPState().IsColorShuffle()) {
+    for (LingoColor color : panel_obj.colors) {
+      if (!GetAPState().HasColorItem(color)) {
+        return false;
+      }
+    }
+  }
+
+  return true;
+}
+
+bool IsDoorReachable_Helper(int door_id, const std::set<int>& reachable_rooms) {
+  const Door& door_obj = GetGameData().GetDoor(door_id);
+
+  switch (GetAPState().GetDoorShuffleMode()) {
+    case DoorShuffleMode::kNone: {
+      if (!reachable_rooms.count(door_obj.room)) {
+        return false;
+      }
+
+      for (int panel_id : door_obj.panels) {
+        if (!IsPanelReachable_Helper(panel_id, reachable_rooms)) {
+          return false;
+        }
+      }
+
+      return true;
+    }
+    case DoorShuffleMode::kSimple: {
+      break;
+    }
+    case DoorShuffleMode::kComplex: {
+      break;
+    }
+  }
+}
+
+void TrackerState::CalculateState() {
+  reachability_.clear();
+
+  std::set<int> reachable_rooms;
+
+  std::list<Exit> flood_boundary;
+  flood_boundary.push_back(
+      {.destination_room = GetGameData().GetRoomByName("Menu")});
+
+  bool reachable_changed = true;
+  while (reachable_changed) {
+    reachable_changed = false;
+
+    std::list<Exit> new_boundary;
+    for (const Exit& room_exit : flood_boundary) {
+      if (reachable_rooms.count(room_exit.destination_room)) {
+        continue;
+      }
+
+      bool valid_transition = false;
+      if (room_exit.door.has_value()) {
+        if (IsDoorReachable_Helper(*room_exit.door, reachable_rooms)) {
+          valid_transition = true;
+        } else if (GetAPState().GetDoorShuffleMode() ==
+                   DoorShuffleMode::kNone) {
+          new_boundary.push_back(room_exit);
+        }
+      } else {
+        valid_transition = true;
+      }
+
+      if (valid_transition) {
+        reachable_rooms.insert(room_exit.destination_room);
+        reachable_changed = true;
+
+        const Room& room_obj =
+            GetGameData().GetRoom(room_exit.destination_room);
+        for (const Exit& out_edge : room_obj.exits) {
+          new_boundary.push_back(out_edge);
+        }
+      }
+    }
+
+    flood_boundary = new_boundary;
+  }
+
+  for (const MapArea& map_area : GetGameData().GetMapAreas()) {
+    for (int section_id = 0; section_id < map_area.locations.size();
+         section_id++) {
+      const Location& location_section = map_area.locations.at(section_id);
+      bool reachable = reachable_rooms.count(location_section.room);
+      if (reachable) {
+        for (int panel_id : location_section.panels) {
+          reachable &= IsPanelReachable_Helper(panel_id, reachable_rooms);
+        }
+      }
+
+      reachability_[{map_area.id, section_id}] = reachable;
+    }
+  }
+}
+
+bool TrackerState::IsLocationReachable(int area_id, int section_id) {
+  std::tuple<int, int> key = {area_id, section_id};
+
+  if (reachability_.count(key)) {
+    return reachability_.at(key);
+  } else {
+    return false;
+  }
+}
+
+TrackerState& GetTrackerState() {
+  static TrackerState* instance = new TrackerState();
+  return *instance;
+}
-- 
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