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+from typing import TYPE_CHECKING, Iterator
+
+from BaseClasses import MultiWorld, CollectionState, ItemClassification, Region, Entrance
+from NetUtils import NetworkItem
+from . import Lingo2World, Lingo2Item
+from .regions import connect_ports_from_ut
+from .options import Lingo2Options, ShuffleLetters
+
+if TYPE_CHECKING:
+    from .context import Lingo2Manager
+
+PLAYER_NUM = 1
+
+
+class Tracker:
+    manager: "Lingo2Manager"
+
+    multiworld: MultiWorld
+    world: Lingo2World
+
+    collected_items: dict[int, int]
+    checked_locations: set[int]
+    accessible_locations: set[int]
+    accessible_worldports: set[int]
+    goal_accessible: bool
+
+    state: CollectionState
+
+    def __init__(self, manager: "Lingo2Manager"):
+        self.manager = manager
+        self.collected_items = {}
+        self.checked_locations = set()
+        self.accessible_locations = set()
+        self.accessible_worldports = set()
+        self.goal_accessible = False
+
+    def setup_slot(self, slot_data):
+        Lingo2World.for_tracker = True
+
+        self.multiworld = MultiWorld(players=PLAYER_NUM)
+        self.world = Lingo2World(self.multiworld, PLAYER_NUM)
+        self.multiworld.worlds[1] = self.world
+        self.world.options = Lingo2Options(**{k: t(slot_data.get(k, t.default))
+                                              for k, t in Lingo2Options.type_hints.items()})
+
+        self.world.generate_early()
+        self.world.create_regions()
+
+        if self.world.options.shuffle_worldports:
+            port_pairings = {
+                self.world.static_logic.port_id_by_ap_id[int(fp)]: self.world.static_logic.port_id_by_ap_id[int(tp)]
+                for fp, tp in slot_data["port_pairings"].items()
+            }
+            connect_ports_from_ut(port_pairings, self.world)
+
+        self.refresh_state()
+
+    def set_checked_locations(self, checked_locations: set[int]):
+        self.checked_locations = checked_locations.copy()
+
+    def set_collected_items(self, network_items: list[NetworkItem]):
+        self.collected_items = {}
+
+        for item in network_items:
+            self.collected_items[item.item] = self.collected_items.get(item.item, 0) + 1
+
+        self.refresh_state()
+
+    def refresh_state(self):
+        self.state = CollectionState(self.multiworld)
+
+        for item_id, item_amount in self.collected_items.items():
+            for i in range(item_amount):
+                self.state.collect(Lingo2Item(Lingo2World.static_logic.item_id_to_name.get(item_id),
+                                              ItemClassification.progression, item_id, PLAYER_NUM), prevent_sweep=True)
+
+        for k, v in self.manager.keyboard.items():
+            # Unless all level 1 letters are pre-unlocked, H1 I1 N1 and T1 act differently between the generator and
+            # game. The generator considers them to be unlocked, which means they are not included in logic
+            # requirements, and only one item/event is needed to unlock their level 2 forms. The game considers them to
+            # be vanilla, which means you still have to pick them up in the Starting Room in order for them to appear on
+            # your keyboard. This also means that whether or not you have the level 1 forms should be synced to the
+            # multiworld. The tracker specifically should collect one fewer item for these letters in this scenario.
+            tv = v
+            if k in "hint" and self.world.options.shuffle_letters in [ShuffleLetters.option_vanilla,
+                                                                      ShuffleLetters.option_progressive]:
+                tv = max(0, v - 1)
+
+            if tv > 0:
+                for i in range(tv):
+                    self.state.collect(Lingo2Item(k.upper(), ItemClassification.progression, None, PLAYER_NUM),
+                                       prevent_sweep=True)
+
+        for port_id in self.manager.worldports:
+            self.state.collect(Lingo2Item(f"Worldport {port_id} Entered", ItemClassification.progression, None,
+                                          PLAYER_NUM), prevent_sweep=True)
+
+        self.state.sweep_for_advancements()
+
+        self.accessible_locations = set()
+        self.accessible_worldports = set()
+        self.goal_accessible = False
+
+        for region in self.state.reachable_regions[PLAYER_NUM]:
+            for location in region.locations:
+                if location.access_rule(self.state):
+                    if location.address is not None:
+                        if location.address not in self.checked_locations:
+                            self.accessible_locations.add(location.address)
+                    elif hasattr(location, "port_id"):
+                        if location.port_id not in self.manager.worldports:
+                            self.accessible_worldports.add(location.port_id)
+                    elif hasattr(location, "goal") and location.goal:
+                        if not self.manager.goaled:
+                            self.goal_accessible = True
+
+    def get_path_to_location(self, location_id: int) -> list[str] | None:
+        location_name = self.world.location_id_to_name.get(location_id)
+        location = self.multiworld.get_location(location_name, PLAYER_NUM)
+        return self.get_logical_path(location.parent_region)
+
+    def get_path_to_port(self, port_id: int) -> list[str] | None:
+        port = self.world.static_logic.objects.ports[port_id]
+        region_name = self.world.static_logic.get_room_region_name(port.room_id)
+        region = self.multiworld.get_region(region_name, PLAYER_NUM)
+        return self.get_logical_path(region)
+
+    def get_path_to_goal(self):
+        room_id = self.world.player_logic.goal_room_id
+        region_name = self.world.static_logic.get_room_region_name(room_id)
+        region = self.multiworld.get_region(region_name, PLAYER_NUM)
+        return self.get_logical_path(region)
+
+    def get_logical_path(self, region: Region) -> list[str] | None:
+        if region not in self.state.path:
+            return None
+
+        def flist_to_iter(path_value) -> Iterator[str]:
+            while path_value:
+                region_or_entrance, path_value = path_value
+                yield region_or_entrance
+
+        reversed_path = self.state.path.get(region)
+        flat_path = reversed(list(map(str, flist_to_iter(reversed_path))))
+
+        return list(flat_path)[1::2]