// 键盘控制相机
// W 前进移动
// S 后退移动
// A 向左移动
// D 向右移动
// Q 向上移动
// E 向下移动
// R 向 左歪头
// T 向 右歪头
// 箭头上 抬头
// 箭头下 低头
// 箭头左 向左转头
// 箭头右 向右转头
// Z 添加移动速度
// X 减小移动速度
// C 添加旋转速度
// V 减小旋转速度

let keyMoveCamera = function (viewer) {
    this.viewer = viewer;
    this.wPress = false
    this.aPress = false
    this.sPress = false
    this.dPress = false
    this.qPress = false
    this.ePress = false
    this.rPress = false
    this.tPress = false
    this.arrowUpPress = false
    this.arrowDownPress = false
    this.arrowLeftPress = false
    this.arrowRightPress = false

    this.moveSpeed = 0.1
    this.rotateSpeed = 0.05
    this.rotateChange = false
    this.moveCameraTimeHandle = 0

    this.keyDown = (e) => {
        switch (e.code) {
            case 'KeyW':
                this.wPress = true
                break;
            case 'KeyS':
                this.sPress = true
                break;
            case 'KeyD':
                this.dPress = true
                break;
            case 'KeyA':
                this.aPress = true
                break;
            case 'KeyQ':
                this.qPress = true
                break;
            case 'KeyE':
                this.ePress = true
                break;
            case 'KeyZ':
                this.moveSpeed *= 1.1
                break;
            case 'KeyX':
                this.moveSpeed *= 0.9
                break;
            case 'KeyC':
                this.rotateSpeed *= 1.1
                break;
            case 'KeyV':
                this.rotateSpeed *= 0.9
                break;
            case 'KeyR':
                this.rPress = true
                break;
            case 'KeyT':
                this.tPress = true
                break;
            case 'ArrowUp':
                this.arrowUpPress = true
                break;
            case 'ArrowDown':
                this.arrowDownPress = true
                break;
            case 'ArrowLeft':
                this.arrowLeftPress = true
                break;
            case 'ArrowRight':
                this.arrowRightPress = true
                break;
            default:
                break;
        }
    }
    this.keyUp = (e) => {
        switch (e.code) {
            case 'KeyW':
                this.wPress = false
                break;
            case 'KeyS':
                this.sPress = false
                break;
            case 'KeyD':
                this.dPress = false
                break;
            case 'KeyA':
                this.aPress = false
                break;
            case 'KeyQ':
                this.qPress = false
                break;
            case 'KeyE':
                this.ePress = false
                break;
            case 'KeyR':
                this.rPress = false
                break;
            case 'KeyT':
                this.tPress = false
                break;
            case 'ArrowUp':
                this.arrowUpPress = false
                break;
            case 'ArrowDown':
                this.arrowDownPress = false
                break;
            case 'ArrowLeft':
                this.arrowLeftPress = false
                break;
            case 'ArrowRight':
                this.arrowRightPress = false
                break;
            default:
                break;
        }
    }
    this.enable = () => {
        if (!this.moveCameraTimeHandle) {
            document.addEventListener('keydown', this.keyDown, false);
            document.addEventListener('keyup', this.keyUp, false);
            this.moveCameraTimeHandle = setInterval(() => {
                if (this.wPress) {
                    this.viewer.camera.moveForward(this.moveSpeed);
                }
                if (this.aPress) {
                    this.viewer.camera.moveLeft(this.moveSpeed);
                }
                if (this.sPress) {
                    this.viewer.camera.moveBackward(this.moveSpeed);
                }
                if (this.dPress) {
                    this.viewer.camera.moveRight(this.moveSpeed);
                }
                let positionTemp = this.viewer.camera.positionWC;
                let orientation = {
                    heading: this.viewer.camera.heading,
                    pitch: this.viewer.camera.pitch,
                    roll: this.viewer.camera.roll,
                    endTransform: Cesium.Matrix4.IDENTITY
                }
                this.rotateChange = false;

                if (this.qPress) {
                    let cartographic = Cesium.Cartographic.fromCartesian(positionTemp);
                    positionTemp = Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, cartographic.height + this.moveSpeed * 2)
                    this.rotateChange = true;
                }
                if (this.ePress) {
                    let cartographic = Cesium.Cartographic.fromCartesian(positionTemp);
                    positionTemp = Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, cartographic.height - this.moveSpeed * 2)
                    this.rotateChange = true;
                }
                if (this.arrowUpPress) {
                    orientation.pitch = Cesium.Math.toRadians(Cesium.Math.toDegrees(this.viewer.camera.pitch) + this.rotateSpeed)
                    this.rotateChange = true;
                }
                if (this.arrowDownPress) {
                    orientation.pitch = Cesium.Math.toRadians(Cesium.Math.toDegrees(this.viewer.camera.pitch) - this.rotateSpeed)
                    this.rotateChange = true;
                }
                if (this.arrowLeftPress) {
                    orientation.heading = Cesium.Math.toRadians(Cesium.Math.toDegrees(this.viewer.camera.heading) - this.rotateSpeed)
                    this.rotateChange = true;
                }
                if (this.arrowRightPress) {
                    orientation.heading = Cesium.Math.toRadians(Cesium.Math.toDegrees(this.viewer.camera.heading) + this.rotateSpeed)
                    this.rotateChange = true;
                }
                if (this.rPress) {
                    orientation.roll = Cesium.Math.toRadians(Cesium.Math.toDegrees(this.viewer.camera.roll) + this.rotateSpeed)
                    this.rotateChange = true;
                }
                if (this.tPress) {
                    orientation.roll = Cesium.Math.toRadians(Cesium.Math.toDegrees(this.viewer.camera.roll) - this.rotateSpeed)
                    this.rotateChange = true;
                }
                if (this.rotateChange) {
                    this.viewer.camera.setView({ destination: positionTemp, orientation: orientation });
                }
            }, 40)
        }
    }
    this.disable = () => {
        document.removeEventListener('keydown', this.keyDown, false);
        document.removeEventListener('keyup', this.keyUp, false);
        clearInterval(this.moveCameraTimeHandle)
        this.moveCameraTimeHandle = 0;
    }
}
export default keyMoveCamera;