import { useFrame, useThree } from "@react-three/fiber";
import React, { useEffect, useState } from "react";
import * as CONSTANTS from "../../../types/world/worldConstants";
import { useCamMode, useToggleView } from "../../../store/builder/store";
import { useKeyboardControls } from "@react-three/drei";
import switchToThirdPerson from "./switchToThirdPerson";
import switchToFirstPerson from "./switchToFirstPerson";
import { detectModifierKeys } from "../../../utils/shortcutkeys/detectModifierKeys";
import { firstPersonCamera } from "./firstPersonCamera";

const CamMode: React.FC = () => {
    const { camMode, setCamMode } = useCamMode();
    const [_, get] = useKeyboardControls();
    const [isTransitioning, setIsTransitioning] = useState(false);
    const state: any = useThree();
    const { toggleView } = useToggleView();
    const [isShiftActive, setIsShiftActive] = useState(false);

    useEffect(() => {
        const handlePointerLockChange = async () => {
            if (document.pointerLockElement && !toggleView) {
            } else if (camMode === "FirstPerson" && !toggleView) {
                setCamMode("ThirdPerson");
                await switchToThirdPerson(state.controls, state.camera);
            }
        };

        document.addEventListener("pointerlockchange", handlePointerLockChange);

        return () => {
            document.removeEventListener("pointerlockchange", handlePointerLockChange);
        };
    }, [camMode, toggleView, setCamMode, state.controls, state.camera]);

    useEffect(() => {
        const handleKeyPress = async (event: KeyboardEvent) => {
            if (!state.controls) return;

            const keyCombination = detectModifierKeys(event);

            if (keyCombination === "/" && !isTransitioning && !toggleView) {
                firstPersonCamera({
                    setIsTransitioning,
                    state,
                    camMode,
                    setCamMode,
                    switchToFirstPerson,
                    switchToThirdPerson,
                });
            }

            if (keyCombination === 'Shift') {
                setIsShiftActive(true);
            }
        };

        const handleKeyUp = (event: KeyboardEvent) => {
            if (event.key === "Shift") {
                setIsShiftActive(false);
            }
        };

        window.addEventListener("keydown", handleKeyPress);
        window.addEventListener("keyup", handleKeyUp);

        return () => {
            window.removeEventListener("keydown", handleKeyPress);
            window.removeEventListener("keyup", handleKeyUp);
        };
        // eslint-disable-next-line react-hooks/exhaustive-deps
    }, [camMode, isTransitioning, toggleView, state.controls, state.camera, setCamMode]);

    useFrame(() => {
        const { forward, backward, left, right } = get();
        if (!state.controls) return;
        if (camMode === "ThirdPerson" || !document.pointerLockElement) return;

        const speedMultiplier = isShiftActive ? 4 : 1;

        if (forward) {
            state.controls.forward(CONSTANTS.firstPersonControls.forwardSpeed * speedMultiplier, true);
        }
        if (backward) {
            state.controls.forward(CONSTANTS.firstPersonControls.backwardSpeed * speedMultiplier, true);
        }
        if (left) {
            state.controls.truck(CONSTANTS.firstPersonControls.leftSpeed * speedMultiplier, 0, true);
        }
        if (right) {
            state.controls.truck(CONSTANTS.firstPersonControls.rightSpeed * speedMultiplier, 0, true);
        }
    });

    return null;
};

export default CamMode;