class Bluetooth {
 
    constructor() {
        this.isOpenBle = false;
        this.deviceId = "";
        this.serviceId = "";
        this.writeId = "";
        this.notifyId = "";
        this.BluetoothConnectStatus = false this.printStatus = false this.init()
    }
    init() {
        this.closeBluetoothAdapter().then(() = >{
            console.log("init初始关闭蓝牙模块") this.openBluetoothAdapter().then(() = >{
                console.log("init初始化蓝牙模块") this.reconnect() //自动连接蓝牙设备
            })
 
        })
    }
 
    showToast(title) {
        uni.showToast({
            title: title,
            icon: 'none',
            'duration': 2000
        });
    }
 
    openBluetoothAdapter() {
        return new Promise((resolve, reject) = >{
            uni.openBluetoothAdapter({
                success: res = >{
                    this.isOpenBle = true;
                    resolve(res);
                },
                fail: err = >{
                    this.showToast(`蓝牙未打开`);
                    reject(err);
                },
            });
        });
 
    }
 
    startBluetoothDevicesDiscovery() {
        if (!this.isOpenBle) {
            this.showToast(`初始化蓝牙模块失败`) return;
        }
 
        let self = this;
        uni.showLoading({
            title: '蓝牙搜索中'
        }) return new Promise((resolve, reject) = >{
            setTimeout(() = >{
                uni.startBluetoothDevicesDiscovery({
                    success: res = >{
                        resolve(res)
                    },
                    fail: res = >{
                        self.showToast(`搜索设备失败` + JSON.stringify(err));
                        reject(err);
                    }
                })
            },
            300);
        });
    }
 
    stopBluetoothDevicesDiscovery() {
        let self = this;
        return new Promise((resolve, reject) = >{
            uni.stopBluetoothDevicesDiscovery({
                success: e = >{
                    uni.hideLoading();
                },
                fail: e = >{
                    uni.hideLoading();
                    self.showToast(`停止搜索蓝牙设备失败` + JSON.stringify(err));
                }
            })
        });
    }
 
    createBLEConnection() {
        //设备deviceId
        let deviceId = this.deviceId;
        let self = this;
 
        // uni.showLoading({
        // 	mask: true,
        // 	title: '设别连接中,请稍候...'
        // })
        console.log(this.deviceId);
        return new Promise((resolve, reject) = >{
            uni.createBLEConnection({
                deviceId,
                success: (res) = >{
                    console.log("res:createBLEConnection " + JSON.stringify(res));
                    resolve(res)
                },
                fail: err = >{
                    uni.hideLoading();
                    self.showToast(`停止搜索蓝牙设备失败` + JSON.stringify(err));
                    reject(err);
                }
            })
        });
    }
 
    //获取蓝牙设备所有服务(service)
    getBLEDeviceServices() {
        let _serviceList = [];
        let deviceId = this.deviceId;
        let self = this;
 
        return new Promise((resolve, reject) = >{
            setTimeout(() = >{
                uni.getBLEDeviceServices({
                    deviceId,
                    success: res = >{
                        for (let service of res.services) {
                            if (service.isPrimary) {
                                _serviceList.push(service);
                            }
                        }
                        uni.hideLoading();
                        console.log("_serviceList: " + JSON.stringify(_serviceList));
                        resolve(_serviceList)
                    },
                    fail: err = >{
                        uni.hideLoading();
                        // self.showToast(`获取设备Services` + JSON.stringify(err));
                        reject(err);
                    },
                })
            },
            500);
        });
    }
 
    //获取蓝牙设备某个服务中所有特征值(characteristic)
    getBLEDeviceCharacteristics() {
        // console.log("getBLEDeviceCharacteristics")
        let deviceId = this.deviceId;
        let serviceId = this.serviceId;
 
        let self = this;
        return new Promise((resolve, reject) = >{
            uni.getBLEDeviceCharacteristics({
                deviceId,
                serviceId,
                success: res = >{
                    for (let _obj of res.characteristics) {
                        //获取notify
                        if (_obj.properties.notify) {
                            self.notifyId = _obj.uuid;
                            uni.setStorageSync('notifyId', self.notifyId);
                        }
                        //获取writeId
                        if (_obj.properties.write) {
                            self.writeId = _obj.uuid;
                            uni.setStorageSync('writeId', self.writeId);
                        }
                    }
 
                    //console.log("res:getBLEDeviceCharacteristics " + JSON.stringify(res));
                    let result = {
                        'notifyId': self.notifyId,
                        'writeId': self.writeId
                    };
                    // self.showToast(`获取服务中所有特征值OK,${JSON.stringify(result)}`);
                    this.BluetoothStatus = true resolve(result)
                },
                fail: err = >{
                    self.showToast(`getBLEDeviceCharacteristics` + JSON.stringify(err));
                    reject(err);
                }
            })
        });
    }
 
    //断开联链接
    closeBLEConnection() {
        let deviceId = this.deviceId;
        uni.closeBLEConnection({
            deviceId,
            success(res) {
                console.log("closeBLEConnection" + res)
            }
        })
    }
 
    notifyBLECharacteristicValue() {
        let deviceId = this.deviceId;
        let serviceId = this.serviceId;
        let characteristicId = this.notifyId;
 
        uni.notifyBLECharacteristicValueChange({
            state: true,
            // 启用 notify 功能
            deviceId,
            serviceId,
            characteristicId,
            success(res) {
                uni.onBLECharacteristicValueChange(function(res) {
                    console.log('onBLECharacteristicValueChange', res);
                });
            },
            fail(res) {
                console.log('notifyBLECharacteristicValueChange failed:' + res.errMsg);
 
            }
        });
    }
 
    writeBLECharacteristicValue(buffer) {
        let deviceId = this.deviceId;
        let serviceId = this.serviceId;
        let characteristicId = this.writeId;
 
        // console.log(deviceId);
        // console.log(serviceId);
        // console.log(characteristicId);
        return new Promise((resolve, reject) = >{
            uni.writeBLECharacteristicValue({
                deviceId,
                serviceId,
                characteristicId,
                value: buffer,
                success(res) {
                    // console.log('message发送成功', JSON.stringify(res));
                    resolve(res);
                },
                fail(err) {
                    // console.log('message发送失败', JSON.stringify(err));
                    reject(err);
                }
            });
        });
    }
 
    closeBluetoothAdapter() {
        return new Promise((resolve, reject) = >{
            uni.closeBluetoothAdapter({
                success: res = >{
                    resolve()
                }
            });
        })
 
    }
 
    //若APP在之前已有搜索过某个蓝牙设备，并成功建立连接，可直接传入之前搜索获取的 deviceId 直接尝试连接该设备，无需进行搜索操作。
    reconnect() { (async() = >{
            try {
                this.deviceId = this.deviceId || uni.getStorageSync("deviceId");
                this.serviceId = this.serviceId || uni.getStorageSync("serviceId");
                console.log("this.deviceId", this.deviceId) console.log("this.serviceId", this.serviceId) let result1 = await this.createBLEConnection();
                console.log("createBLEConnection: " + JSON.stringify(result1));
 
                let result2 = await this.getBLEDeviceServices();
                console.log("getBLEDeviceServices: " + JSON.stringify(result2));
 
                let result3 = await this.getBLEDeviceCharacteristics();
                console.log("getBLEDeviceCharacteristics: " + JSON.stringify(result3));
                this.BluetoothConnectStatus = true this.showToast("蓝牙打印设备连接成功")
                // this.writeId = uni.getStorageSync("writeId");
                // this.notifyId = uni.getStorageSync("notifyId");
            } catch(err) {
                console.log("err: " + err);
                // this.showToast("蓝牙打印设备连接失败")
            }
 
        })();
    }
}
 
export
default Bluetooth;