/*
 * Copyright 2019 Hippo Seven
 *
 * 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.hippo.ehviewer;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Debug;

import androidx.annotation.NonNull;

import com.hippo.util.PackageUtils;
import com.hippo.util.ReadableTime;
import com.hippo.yorozuya.FileUtils;
import com.hippo.yorozuya.IOUtils;
import com.hippo.yorozuya.OSUtils;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;

public final class Crash {
    private Crash() {
    }

    @NonNull
    private static String avoidNull(String str) {
        return null != str ? str : "null";
    }

    private static void collectInfo(Context context, FileWriter fw) throws IOException {
        try {
            PackageManager pm = context.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(context.getPackageName(), PackageManager.GET_ACTIVITIES);
            if (pi != null) {
                String versionName = pi.versionName == null ? "null" : pi.versionName;
                String versionCode = String.valueOf(pi.versionCode);
                fw.write("======== PackageInfo ========\r\n");
                fw.write("PackageName=");
                fw.write(pi.packageName);
                fw.write("\r\n");
                fw.write("VersionName=");
                fw.write(versionName);
                fw.write("\r\n");
                fw.write("VersionCode=");
                fw.write(versionCode);
                fw.write("\r\n");
                String signature = PackageUtils.getSignature(context, pi.packageName);
                fw.write("Signature=");
                fw.write(null != signature ? signature : "null");
                fw.write("\r\n");
                fw.write("\r\n");
            }
        } catch (PackageManager.NameNotFoundException e) {
            fw.write("======== PackageInfo ========\r\n");
            fw.write("Can't get package information\r\n");
            fw.write("\r\n");
        }

        // Runtime
        String topActivityClazzName = "null";
        fw.write("======== Runtime ========\r\n");
        fw.write("TopActivity=");
        fw.write(avoidNull(topActivityClazzName));
        fw.write("\r\n");
        fw.write("\r\n");
        fw.write("\r\n");

        // Device info
        fw.write("======== DeviceInfo ========\r\n");
        fw.write("BOARD=");
        fw.write(Build.BOARD);
        fw.write("\r\n");
        fw.write("BOOTLOADER=");
        fw.write(Build.BOOTLOADER);
        fw.write("\r\n");
        fw.write("SUPPORTED_ABIS=");
        fw.write(Arrays.toString(Build.SUPPORTED_ABIS));
        fw.write("\r\n");
        fw.write("DEVICE=");
        fw.write(Build.DEVICE);
        fw.write("\r\n");
        fw.write("DISPLAY=");
        fw.write(Build.DISPLAY);
        fw.write("\r\n");
        fw.write("FINGERPRINT=");
        fw.write(Build.FINGERPRINT);
        fw.write("\r\n");
        fw.write("HARDWARE=");
        fw.write(Build.HARDWARE);
        fw.write("\r\n");
        fw.write("HOST=");
        fw.write(Build.HOST);
        fw.write("\r\n");
        fw.write("ID=");
        fw.write(Build.ID);
        fw.write("\r\n");
        fw.write("MANUFACTURER=");
        fw.write(Build.MANUFACTURER);
        fw.write("\r\n");
        fw.write("MODEL=");
        fw.write(Build.MODEL);
        fw.write("\r\n");
        fw.write("PRODUCT=");
        fw.write(Build.PRODUCT);
        fw.write("\r\n");
        fw.write("RADIO=");
        fw.write(Build.getRadioVersion());
        fw.write("\r\n");
        fw.write("TAGS=");
        fw.write(Build.TAGS);
        fw.write("\r\n");
        fw.write("TYPE=");
        fw.write(Build.TYPE);
        fw.write("\r\n");
        fw.write("USER=");
        fw.write(Build.USER);
        fw.write("\r\n");
        fw.write("CODENAME=");
        fw.write(Build.VERSION.CODENAME);
        fw.write("\r\n");
        fw.write("INCREMENTAL=");
        fw.write(Build.VERSION.INCREMENTAL);
        fw.write("\r\n");
        fw.write("RELEASE=");
        fw.write(Build.VERSION.RELEASE);
        fw.write("\r\n");
        fw.write("SDK=");
        fw.write(Integer.toString(Build.VERSION.SDK_INT));
        fw.write("\r\n");
        fw.write("MEMORY=");
        fw.write(
                FileUtils.humanReadableByteCount(OSUtils.getAppAllocatedMemory(), false));
        fw.write("\r\n");
        fw.write("MEMORY_NATIVE=");
        fw.write(FileUtils.humanReadableByteCount(Debug.getNativeHeapAllocatedSize(), false));
        fw.write("\r\n");
        fw.write("MEMORY_MAX=");
        fw.write(FileUtils.humanReadableByteCount(OSUtils.getAppMaxMemory(), false));
        fw.write("\r\n");
        fw.write("MEMORY_TOTAL=");
        fw.write(FileUtils.humanReadableByteCount(OSUtils.getTotalMemory(), false));
        fw.write("\r\n");
        fw.write("\r\n");
    }

    private static void getThrowableInfo(Throwable t, FileWriter fw) {
        PrintWriter printWriter = new PrintWriter(fw);
        t.printStackTrace(printWriter);
        Throwable cause = t.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
    }

    public static void saveCrashLog(Context context, Throwable t) {
        File dir = AppConfig.getExternalCrashDir();
        if (dir == null) {
            return;
        }

        String nowString = ReadableTime.getFilenamableTime(System.currentTimeMillis());
        String fileName = "crash-" + nowString + ".log";
        File file = new File(dir, fileName);

        FileWriter fw = null;
        try {
            fw = new FileWriter(file);
            fw.write("TIME=");
            fw.write(nowString);
            fw.write("\r\n");
            fw.write("\r\n");
            collectInfo(context, fw);
            fw.write("======== CrashInfo ========\r\n");
            getThrowableInfo(t, fw);
            fw.write("\r\n");
            fw.flush();
        } catch (Exception e) {
            file.delete();
        } finally {
            IOUtils.closeQuietly(fw);
        }
    }
}