import { Point3D } from "chootils/dist/points3d";
import delay from "delay";
import { getState, onNextTick, setState } from "repond";
import { meta } from "../../meta";
import {
  AnyCameraName,
  AnySegmentName,
  CameraNameByPlace,
  CameraNameFromPlace,
  CharacterName,
  PlaceName,
  SegmentNameByPlace,
  SpotNameByPlace,
  WallNameByPlace,
} from "../../types";
import { get2DAngleFromCharacterToSpot, getCharDollStuff } from "../prendyUtils/characters";
import { setGlobalState } from "../prendyUtils/global";
import { doWhenNowCamChanges, doWhenNowSegmentChanges, getSegmentFromSegmentRules } from "../prendyUtils/scene";

type ToPlaceOption<T_PlaceName extends PlaceName> = {
  toPlace: T_PlaceName;
  toSpot?: SpotNameByPlace[T_PlaceName];
  toPositon?: Point3D;
  // NOTE might be able to make this auto if the first spot is inside a cam collider?
  toCam?: CameraNameByPlace[T_PlaceName];
  toSegment?: SegmentNameByPlace[T_PlaceName]; // could use nicer type like SegmentNameFromCamAndPlace,  or a new SegmentNameFromPlace?
};

async function changeSegmentAtLoop<
  T_Place extends PlaceName,
  T_Segment extends AnySegmentName // NOTE & might mes with the tye here
>(_place: T_Place, newSegmentName: T_Segment) {
  // NOTE WARNING This will probably break if goalSegmentNameAtLoop changes from somewhere else!!!
  // to fix: could listen to changes to goalSegmentNameAtLoop
  // might be fixed now that doWhenNowSegmentChanges listens to any change, instead of waiting for the expected segment name
  // FIXME this can not work? (the async resolve part)
  return new Promise<void>((resolve, _reject) => {
    onNextTick(() => {
      setGlobalState((state) => {
        const { goalSegmentNameAtLoop } = state;
        if (goalSegmentNameAtLoop) {
          // TEMP resolve straight away if there's already a goalSegmentNameAtLoop
          console.error("there was already a goalSegmentNameAtLoop when running changeSegmentAtLoopAsync");
          resolve();
          return {};
        }

        doWhenNowSegmentChanges(newSegmentName, () => resolve());

        return { goalSegmentNameAtLoop: newSegmentName };
      });
    });
  });
}

async function changeCameraAtLoop<
  // WARNING This might mess up if the place changes while the cam change was waiting
  T_Place extends PlaceName,
  T_Cam extends CameraNameFromPlace<T_Place> & AnyCameraName // NOTE new & type
>(_place: T_Place, newCamName: T_Cam) {
  return new Promise<void>((resolve, _reject) => {
    setState((state) => {
      const { goalCamNameAtLoop } = state.global.main;
      if (goalCamNameAtLoop) {
        // TEMP resolve straight away if there's already a goalCamNameAtLoop
        console.error("there was already a goalSegmentNameAtLoop when running changeSegmentAtLoopAsync");
        resolve();
        return {};
      }

      doWhenNowCamChanges(newCamName, () => resolve());

      return {
        // AnyCameraName needed if there's only 1 place
        global: { main: { goalCamNameAtLoop: newCamName } },
      };
    });
  });
}

export function lookAtSpot<T_Place extends PlaceName>(
  place: T_Place,
  spot: SpotNameByPlace[T_Place],
  character?: CharacterName
) {
  const { playerCharacter } = getState().global.main;
  const editedCharacter = character ?? (playerCharacter as CharacterName);
  const charDollStuff = getCharDollStuff(editedCharacter);
  const { dollName } = charDollStuff;

  const angle = get2DAngleFromCharacterToSpot(editedCharacter, place, spot);
  setState({ dolls: { [dollName]: { rotationYGoal: angle } } });
}

export function hideWallIf<T_Place extends PlaceName, T_Wall extends WallNameByPlace[T_Place]>(
  placeName: T_Place,
  wallName: T_Wall,
  isDisabled: boolean
) {
  // NOTE could update to set properties in a loop to avoid spreading
  setState((state) => ({
    places: {
      [placeName]: { toggledWalls: { ...(state.places[placeName].toggledWalls as any), [wallName]: !isDisabled } },
    },
  }));
}

export async function showStoryView(isVisible: boolean = true) {
  const GUESSED_FADE_TIME = 1000; // note could listen to something like isFullyFaded and return here, but maybe a set time is okay
  setGlobalState({ storyOverlayToggled: !isVisible });
  await delay(GUESSED_FADE_TIME);
}

export function setSegment<T_Place extends PlaceName, T_Segment extends SegmentNameByPlace[T_Place]>(
  _placeName: T_Place,
  segmentName: T_Segment
  // whenToRun: "now" | "at loop" = "at loop"
) {
  return new Promise<void>((resolve, _reject) => {
    // always sets segment at loop sicne it probably shouldn't change halfway through

    // if (whenToRun === "now") {
    //   const { nowSegmentName } = getState().global.main;
    //   if (nowSegmentName === segmentName) {
    //     console.warn("already on that segment");
    //     resolve();
    //     return;
    //   }
    //   setGlobalState({ goalSegmentName: segmentName }, () => resolve());
    // } else if (whenToRun === "at loop") {
    changeSegmentAtLoop(_placeName, segmentName as any).finally(() => resolve());
    // }
  });
}

export function setCamera<
  T_Place extends PlaceName,
  T_Cam extends CameraNameFromPlace<T_Place> & AnyCameraName // NOTE & Type
>(_placeName: T_Place, cameraName: T_Cam, whenToRun: "now" | "at loop" = "now") {
  return new Promise<void>((resolve, _reject) => {
    if (whenToRun === "now") {
      const { nowPlaceName } = getState().global.main;
      const { nowCamName } = getState().global.main;

      // already on that camera
      if (nowCamName === cameraName) {
        resolve();
        return;
      }

      // AnyCameraName needed if there's only 1 place
      setState({ global: { main: { goalCamName: cameraName } } }, () => resolve());
    } else if (whenToRun === "at loop") {
      changeCameraAtLoop(_placeName, cameraName as any).finally(() => resolve());
    }
  });
}

export function goToNewPlace<T_PlaceName extends PlaceName>(
  toOption: ToPlaceOption<T_PlaceName>,
  charNameParam?: CharacterName
) {
  const charName = charNameParam || meta.assets!.characterNames[0];

  const { placeInfoByName } = meta.assets!;

  // NOTE could include waitForPlaceFullyLoaded here so it can be awaited
  let { toSpot, toPlace, toPositon, toCam, toSegment } = toOption;
  const { dollName } = getCharDollStuff(charName) ?? {};

  if (!dollName) return;

  onNextTick(() => {
    setState((state) => {
      const newPlaceDefaultCamName = placeInfoByName[toPlace].cameraNames[0];
      const nowSegmentName = state.global.main.nowSegmentName;

      const placeInfo = placeInfoByName[toPlace];
      // toSpot = toSpot ?? (placeInfo.spotNames[0] as SpotNameByPlace[T_PlaceName]);
      toSpot = toSpot; // ?? (placeInfo.spotNames[0] as SpotNameByPlace[T_PlaceName]);
      toPositon = toPositon;
      toCam = toCam ?? (placeInfo.cameraNames[0] as NonNullable<typeof toCam>); // types as a cam for the chosen place
      toSegment = toSegment ?? (placeInfo.segmentNames[0] as SegmentNameByPlace[T_PlaceName]);

      const foundRuleSegmentName = getSegmentFromSegmentRules(toPlace, toCam);
      if (foundRuleSegmentName) toSegment = foundRuleSegmentName;

      return {
        global: {
          main: {
            goalPlaceName: toPlace,
            goalSegmentWhenGoalPlaceLoads: toSegment || nowSegmentName,
            goalCamWhenNextPlaceLoads: toCam || newPlaceDefaultCamName,
          },
        },
        dolls: { [dollName]: { goalPositionAtNewPlace: toPositon, goalSpotNameAtNewPlace: toSpot } },
      };
    });
  });
}

// ideas

// disable/enable camCubes ?
// start/stop characterFollowinglayer ?

// }