/*
 * Copyright 2016 Shazam Entertainment Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
 *
 * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
 */
package com.shazam.fork.device;

import com.android.ddmlib.IDevice;
import com.shazam.fork.model.Device;
import com.shazam.fork.model.Devices;
import com.shazam.fork.system.adb.Adb;

import java.util.*;

import javax.annotation.Nonnull;

import static com.shazam.fork.model.Device.Builder.aDevice;
import static com.shazam.fork.model.Devices.Builder.devices;

/**
 * Turns a serial number or an IDevice reference to a Device.
 */
public class DeviceLoader {
    private final Adb adb;
    private final DeviceGeometryRetriever deviceGeometryRetriever;
    private final Collection<String> excludedSerials;

    public DeviceLoader(Adb adb, DeviceGeometryRetriever deviceGeometryRetriever, Collection<String> excludedSerials) {
        this.adb = adb;
        this.deviceGeometryRetriever = deviceGeometryRetriever;
        this.excludedSerials = excludedSerials;
    }

    /**
     * Retrieve all connected and non-excluded devices.
     *
     * @return the connected devices
     */
    public Devices loadDevices() {
        Devices.Builder devicesBuilder = devices();
        List<IDevice> iDevices = loadAllDevices();
        for (IDevice iDevice : iDevices) {
            devicesBuilder.putDevice(iDevice.getSerialNumber(), loadDeviceCharacteristics(iDevice));
        }

        return devicesBuilder.build();
    }

    public Device loadDevice(@Nonnull String serial) throws DeviceCouldNotBeFoundException {
        Optional<IDevice> deviceOptional = loadAllDevices()
                .stream()
                .filter(d -> serial.equals(d.getSerialNumber()))
                .findFirst();

        if (deviceOptional.isPresent()) {
            return loadDeviceCharacteristics(deviceOptional.get());
        }
        throw new DeviceCouldNotBeFoundException("Could not load device with serial: " + serial);
    }

    /**
     * Retrieve all connected devices which survive the FORK_EXCLUDED_SERIAL filter.
     *
     * @return a list of connected devices
     */
    private List<IDevice> loadAllDevices() {
        List<IDevice> devices = new ArrayList<>();
        for (IDevice device : adb.getDevices()) {
            String serialNumber = device.getSerialNumber();
            if (!excludedSerials.contains(serialNumber)) {
                devices.add(device);
            }
        }
        return devices;
    }

    private Device loadDeviceCharacteristics(IDevice device) {
        return aDevice()
                .withSerial(device.getSerialNumber())
                .withManufacturer(device.getProperty("ro.product.manufacturer"))
                .withModel(device.getProperty("ro.product.model"))
                .withApiLevel(device.getProperty("ro.build.version.sdk"))
                .withDeviceInterface(device)
                .withTabletCharacteristic(device.getProperty("ro.build.characteristics"))
                .withDisplayGeometry(deviceGeometryRetriever.detectGeometry(device)).build();
    }
}