package com.sobot.common.ui.notchlib.utils;

import android.annotation.SuppressLint;
import android.os.Build;
import android.os.Environment;
import android.text.TextUtils;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.lang.reflect.Method;
import java.util.Properties;


public final class RomUtils {

    private static final String HUAWEI = "huawei";
    private static final String VIVO = "vivo";
    private static final String XIAOMI = "xiaomi";
    private static final String OPPO = "oppo";

    private static final String VERSION_PROPERTY_HUAWEI = "ro.build.version.emui";
    private static final String VERSION_PROPERTY_VIVO = "ro.vivo.os.build.display.id";
    private static final String VERSION_PROPERTY_XIAOMI = "ro.build.version.incremental";
    private static final String VERSION_PROPERTY_OPPO = "ro.build.version.opporom";
    private static final String UNKNOWN = "unknown";

    private static RomInfo bean = null;

    private RomUtils() {
        throw new UnsupportedOperationException("u can't instantiate me...");
    }

    /**
     * Return whether the rom is made by huawei.
     *
     * @return {@code true}: yes<br>{@code false}: no
     */
    public static boolean isHuawei() {
        return HUAWEI.equals(getRomInfo().name);
    }

    /**
     * Return whether the rom is made by vivo.
     *
     * @return {@code true}: yes<br>{@code false}: no
     */
    public static boolean isVivo() {
        return VIVO.equals(getRomInfo().name);
    }

    /**
     * Return whether the rom is made by xiaomi.
     *
     * @return {@code true}: yes<br>{@code false}: no
     */
    public static boolean isXiaomi() {
        return XIAOMI.equals(getRomInfo().name);
    }

    /**
     * Return whether the rom is made by oppo.
     *
     * @return {@code true}: yes<br>{@code false}: no
     */
    public static boolean isOppo() {
        return OPPO.equals(getRomInfo().name);
    }

    /**
     * Return the rom's information.
     *
     * @return the rom's information
     */
    public static RomInfo getRomInfo() {
        if (bean != null) return bean;
        bean = new RomInfo();
        final String brand = getBrand();
        final String manufacturer = getManufacturer();
        if (isRightRom(brand, manufacturer, HUAWEI)) {
            bean.name = HUAWEI;
            String version = getRomVersion(VERSION_PROPERTY_HUAWEI);
            String[] temp = version.split("_");
            if (temp.length > 1) {
                bean.version = temp[1];
            } else {
                bean.version = version;
            }
            return bean;
        }
        if (isRightRom(brand, manufacturer, VIVO)) {
            bean.name = VIVO;
            bean.version = getRomVersion(VERSION_PROPERTY_VIVO);
            return bean;
        }
        if (isRightRom(brand, manufacturer, XIAOMI)) {
            bean.name = XIAOMI;
            bean.version = getRomVersion(VERSION_PROPERTY_XIAOMI);
            return bean;
        }
        if (isRightRom(brand, manufacturer, OPPO)) {
            bean.name = OPPO;
            bean.version = getRomVersion(VERSION_PROPERTY_OPPO);
            return bean;
        } else {
            bean.name = manufacturer;
        }
        bean.version = getRomVersion("");
        return bean;
    }

    private static boolean isRightRom(final String brand, final String manufacturer, final String... names) {
        for (String name : names) {
            if (brand.contains(name) || manufacturer.contains(name)) {
                return true;
            }
        }
        return false;
    }

    private static String getManufacturer() {
        try {
            String manufacturer = Build.MANUFACTURER;
            if (!TextUtils.isEmpty(manufacturer)) {
                return manufacturer.toLowerCase();
            }
        } catch (Throwable ignore) { /**/ }
        return UNKNOWN;
    }

    private static String getBrand() {
        try {
            String brand = Build.BRAND;
            if (!TextUtils.isEmpty(brand)) {
                return brand.toLowerCase();
            }
        } catch (Throwable ignore) { /**/ }
        return UNKNOWN;
    }

    private static String getRomVersion(final String propertyName) {
        String ret = "";
        if (!TextUtils.isEmpty(propertyName)) {
            ret = getSystemProperty(propertyName);
        }
        if (TextUtils.isEmpty(ret) || ret.equals(UNKNOWN)) {
            try {
                String display = Build.DISPLAY;
                if (!TextUtils.isEmpty(display)) {
                    ret = display.toLowerCase();
                }
            } catch (Throwable ignore) { /**/ }
        }
        if (TextUtils.isEmpty(ret)) {
            return UNKNOWN;
        }
        return ret;
    }

    private static String getSystemProperty(final String name) {
        String prop = getSystemPropertyByShell(name);
        if (!TextUtils.isEmpty(prop)) return prop;
        prop = getSystemPropertyByStream(name);
        if (!TextUtils.isEmpty(prop)) return prop;
        if (Build.VERSION.SDK_INT < 28) {
            return getSystemPropertyByReflect(name);
        }
        return prop;
    }

    private static String getSystemPropertyByShell(final String propName) {
        String line;
        BufferedReader input = null;
        try {
            Process p = Runtime.getRuntime().exec("getprop " + propName);
            input = new BufferedReader(new InputStreamReader(p.getInputStream()), 1024);
            String ret = input.readLine();
            if (ret != null) {
                return ret;
            }
        } catch (IOException ignore) {
        } finally {
            if (input != null) {
                try {
                    input.close();
                } catch (IOException ignore) { /**/ }
            }
        }
        return "";
    }

    private static String getSystemPropertyByStream(final String key) {
        try {
            Properties prop = new Properties();
            FileInputStream is = new FileInputStream(
                    new File(Environment.getRootDirectory(), "build.prop")
            );
            prop.load(is);
            return prop.getProperty(key, "");
        } catch (Exception ignore) { /**/ }
        return "";
    }

    private static String getSystemPropertyByReflect(String key) {
        try {
            @SuppressLint("PrivateApi")
            Class<?> clz = Class.forName("android.os.SystemProperties");
            Method getMethod = clz.getMethod("get", String.class, String.class);
            return (String) getMethod.invoke(clz, key, "");
        } catch (Exception e) { /**/ }
        return "";
    }

    public static class RomInfo {
        private String name;
        private String version;

        public String getName() {
            return name;
        }

        public String getVersion() {
            return version;
        }

        @Override
        public String toString() {
            return "RomInfo{name=" + name +
                    ", version=" + version + "}";
        }
    }
}