package info.nightscout.androidaps;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Rect;
import android.os.Bundle;
import android.os.PersistableBundle;
import android.os.PowerManager;
import android.support.annotation.Nullable;
import android.support.design.widget.NavigationView;
import android.support.design.widget.TabLayout;
import android.support.v4.app.ActivityCompat;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.SpannableString;
import android.text.method.LinkMovementMethod;
import android.text.util.Linkify;
import android.util.TypedValue;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.joanzapata.iconify.Iconify;
import com.joanzapata.iconify.fonts.FontAwesomeModule;
import com.squareup.otto.Subscribe;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import info.nightscout.androidaps.data.Profile;
import info.nightscout.androidaps.events.EventAppExit;
import info.nightscout.androidaps.events.EventFeatureRunning;
import info.nightscout.androidaps.events.EventPreferenceChange;
import info.nightscout.androidaps.events.EventRefreshGui;
import info.nightscout.androidaps.interfaces.PluginBase;
import info.nightscout.androidaps.plugins.ConfigBuilder.ConfigBuilderPlugin;
import info.nightscout.androidaps.plugins.Food.FoodPlugin;
import info.nightscout.androidaps.plugins.Treatments.TreatmentsPlugin;
import info.nightscout.androidaps.setupwizard.SetupWizardActivity;
import info.nightscout.androidaps.tabs.TabPageAdapter;
import info.nightscout.utils.AndroidPermission;
import info.nightscout.utils.ImportExportPrefs;
import info.nightscout.utils.LocaleHelper;
import info.nightscout.utils.LogDialog;
import info.nightscout.utils.OKDialog;
import info.nightscout.utils.PasswordProtection;
import info.nightscout.utils.SP;

public class MainActivity extends AppCompatActivity {
    private static Logger log = LoggerFactory.getLogger(MainActivity.class);

    protected PowerManager.WakeLock mWakeLock;

    private ActionBarDrawerToggle actionBarDrawerToggle;

    private MenuItem pluginPreferencesMenuItem;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (Config.logFunctionCalls)
            log.debug("onCreate");

        Iconify.with(new FontAwesomeModule());
        LocaleHelper.onCreate(this, "en");

        setContentView(R.layout.activity_main);
        setSupportActionBar(findViewById(R.id.toolbar));
        getSupportActionBar().setDisplayShowTitleEnabled(false);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);

        DrawerLayout drawerLayout = findViewById(R.id.drawer_layout);
        actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.open_navigation, R.string.close_navigation);
        drawerLayout.addDrawerListener(actionBarDrawerToggle);
        actionBarDrawerToggle.syncState();

        // initialize screen wake lock
        onEventPreferenceChange(new EventPreferenceChange(R.string.key_lockscreen));

        doMigrations();

        registerBus();
        setupTabs();
        setupViews(false);

        final ViewPager viewPager = findViewById(R.id.pager);
        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            }

            @Override
            public void onPageSelected(int position) {
                checkPluginPreferences(viewPager);
            }

            @Override
            public void onPageScrollStateChanged(int state) {
            }
        });
    }

    private void checkPluginPreferences(ViewPager viewPager) {
        if (pluginPreferencesMenuItem == null) return;
        if (((TabPageAdapter) viewPager.getAdapter()).getPluginAt(viewPager.getCurrentItem()).getPreferencesId() != -1)
            pluginPreferencesMenuItem.setEnabled(true);
        else pluginPreferencesMenuItem.setEnabled(false);
    }

    @Override
    public void onPostCreate(@Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) {
        super.onPostCreate(savedInstanceState, persistentState);
        actionBarDrawerToggle.syncState();
    }

    @Override
    protected void onResume() {
        super.onResume();

        if (!SP.getBoolean(R.string.key_setupwizard_processed, false)) {
            Intent intent = new Intent(this, SetupWizardActivity.class);
            startActivity(intent);
        } else {
            checkEula();
        }

        AndroidPermission.notifyForStoragePermission(this);
        AndroidPermission.notifyForBatteryOptimizationPermission(this);
        if (BuildConfig.APS || BuildConfig.PUMPCONTROL) {
            AndroidPermission.notifyForLocationPermissions(this);
            AndroidPermission.notifyForSMSPermissions(this);
        }

        MainApp.bus().post(new EventFeatureRunning(EventFeatureRunning.Feature.MAIN));
    }

    @Override
    public void onDestroy() {
        if (mWakeLock != null)
            if (mWakeLock.isHeld())
                mWakeLock.release();
        super.onDestroy();
    }

    @Subscribe
    public void onEventPreferenceChange(final EventPreferenceChange ev) {
        if (ev.isChanged(R.string.key_lockscreen)) {
            boolean lock = SP.getBoolean(R.string.key_lockscreen, false);
            final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
            if (lock) {
                mWakeLock = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, "AAPS");
                if (!mWakeLock.isHeld())
                    mWakeLock.acquire();
            } else {
                if (mWakeLock != null && mWakeLock.isHeld())
                    mWakeLock.release();
            }
        }
    }

    @Subscribe
    public void onStatusEvent(final EventRefreshGui ev) {
        String lang = SP.getString("language", "en");
        LocaleHelper.setLocale(getApplicationContext(), lang);
        runOnUiThread(() -> {
            if (ev.recreate) {
                recreate();
            } else {
                try { // activity may be destroyed
                    setupTabs();
                    setupViews(true);
                } catch (IllegalStateException e) {
                    log.error("Unhandled exception", e);
                }
            }

            boolean lockScreen = BuildConfig.NSCLIENTOLNY && SP.getBoolean(R.string.key_lockscreen, false);
            if (lockScreen)
                getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
            else
                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        });
    }

    private void setupViews(boolean switchToLast) {
        TabPageAdapter pageAdapter = new TabPageAdapter(getSupportFragmentManager(), this);
        NavigationView navigationView = findViewById(R.id.navigation_view);
        navigationView.setNavigationItemSelectedListener(menuItem -> {
            return true;
        });
        Menu menu = navigationView.getMenu();
        menu.clear();
        for (PluginBase p : MainApp.getPluginsList()) {
            pageAdapter.registerNewFragment(p);
            if (p.hasFragment() && !p.isFragmentVisible() && p.isEnabled(p.pluginDescription.getType()) && !p.pluginDescription.neverVisible) {
                MenuItem menuItem = menu.add(p.getName());
                menuItem.setCheckable(true);
                menuItem.setOnMenuItemClickListener(item -> {
                    Intent intent = new Intent(this, SingleFragmentActivity.class);
                    intent.putExtra("plugin", MainApp.getPluginsList().indexOf(p));
                    startActivity(intent);
                    ((DrawerLayout) findViewById(R.id.drawer_layout)).closeDrawers();
                    return true;
                });
            }
        }
        ViewPager mPager = findViewById(R.id.pager);
        mPager.setAdapter(pageAdapter);
        if (switchToLast)
            mPager.setCurrentItem(pageAdapter.getCount() - 1, false);
        checkPluginPreferences(mPager);
    }

    private void setupTabs() {
        ViewPager viewPager = findViewById(R.id.pager);
        TabLayout normalTabs = findViewById(R.id.tabs_normal);
        normalTabs.setupWithViewPager(viewPager, true);
        TabLayout compactTabs = findViewById(R.id.tabs_compact);
        compactTabs.setupWithViewPager(viewPager, true);
        Toolbar toolbar = findViewById(R.id.toolbar);
        if (SP.getBoolean("short_tabtitles", false)) {
            normalTabs.setVisibility(View.GONE);
            compactTabs.setVisibility(View.VISIBLE);
            toolbar.setLayoutParams(new LinearLayout.LayoutParams(Toolbar.LayoutParams.MATCH_PARENT, (int) getResources().getDimension(R.dimen.compact_height)));
        } else {
            normalTabs.setVisibility(View.VISIBLE);
            compactTabs.setVisibility(View.GONE);
            TypedValue typedValue = new TypedValue();
            if (getTheme().resolveAttribute(R.attr.actionBarSize, typedValue, true)) {
                toolbar.setLayoutParams(new LinearLayout.LayoutParams(Toolbar.LayoutParams.MATCH_PARENT,
                        TypedValue.complexToDimensionPixelSize(typedValue.data, getResources().getDisplayMetrics())));
            }
        }
    }

    private void registerBus() {
        try {
            MainApp.bus().unregister(this);
        } catch (RuntimeException x) {
            // Ignore
        }
        MainApp.bus().register(this);
    }

    private void checkEula() {
        //SP.removeBoolean(R.string.key_i_understand);
        boolean IUnderstand = SP.getBoolean(R.string.key_i_understand, false);
        if (!IUnderstand) {
            Intent intent = new Intent(getApplicationContext(), AgreementActivity.class);
            startActivity(intent);
            finish();
        }
    }

    private void doMigrations() {

        checkUpgradeToProfileTarget();

        // guarantee that the unreachable threshold is at least 30 and of type String
        // Added in 1.57 at 21.01.2018
        Integer unreachable_threshold = SP.getInt(R.string.key_pump_unreachable_threshold, 30);
        SP.remove(R.string.key_pump_unreachable_threshold);
        if (unreachable_threshold < 30) unreachable_threshold = 30;
        SP.putString(R.string.key_pump_unreachable_threshold, unreachable_threshold.toString());
    }


    private void checkUpgradeToProfileTarget() { // TODO: can be removed in the future
        boolean oldKeyExists = SP.contains("openapsma_min_bg");
        if (oldKeyExists) {
            Profile profile = MainApp.getConfigBuilder().getProfile();
            String oldRange = SP.getDouble("openapsma_min_bg", 0d) + " - " + SP.getDouble("openapsma_max_bg", 0d);
            String newRange = "";
            if (profile != null) {
                newRange = profile.getTargetLow() + " - " + profile.getTargetHigh();
            }
            String message = "Target range is changed in current version.\n\nIt's not taken from preferences but from profile.\n\n!!! REVIEW YOUR SETTINGS !!!";
            message += "\n\nOld settings: " + oldRange;
            message += "\nProfile settings: " + newRange;
            OKDialog.show(this, "Target range change", message, new Runnable() {
                @Override
                public void run() {
                    SP.remove("openapsma_min_bg");
                    SP.remove("openapsma_max_bg");
                    SP.remove("openapsma_target_bg");
                }
            });
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (permissions.length != 0) {
            if (ActivityCompat.checkSelfPermission(this, permissions[0]) == PackageManager.PERMISSION_GRANTED) {
                switch (requestCode) {
                    case AndroidPermission.CASE_STORAGE:
                        //show dialog after permission is granted
                        AlertDialog.Builder alert = new AlertDialog.Builder(this);
                        alert.setMessage(R.string.alert_dialog_storage_permission_text);
                        alert.setPositiveButton(R.string.ok, null);
                        alert.show();
                        break;
                    case AndroidPermission.CASE_LOCATION:
                    case AndroidPermission.CASE_SMS:
                    case AndroidPermission.CASE_BATTERY:
                        break;
                }
            }
        }
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            View v = getCurrentFocus();
            if (v instanceof EditText) {
                Rect outRect = new Rect();
                v.getGlobalVisibleRect(outRect);
                if (!outRect.contains((int) event.getRawX(), (int) event.getRawY())) {
                    v.clearFocus();
                    InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                    imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
                }
            }
        }
        return super.dispatchTouchEvent(event);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        pluginPreferencesMenuItem = menu.findItem(R.id.nav_plugin_preferences);
        checkPluginPreferences(findViewById(R.id.pager));
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        switch (id) {
            case R.id.nav_preferences:
                PasswordProtection.QueryPassword(this, R.string.settings_password, "settings_password", () -> {
                    Intent i = new Intent(this, PreferencesActivity.class);
                    i.putExtra("id", -1);
                    startActivity(i);
                }, null);
                return true;
            case R.id.nav_historybrowser:
                startActivity(new Intent(this, HistoryBrowseActivity.class));
                return true;
            case R.id.nav_setupwizard:
                startActivity(new Intent(this, SetupWizardActivity.class));
                return true;
            case R.id.nav_resetdb:
                new AlertDialog.Builder(this)
                        .setTitle(R.string.nav_resetdb)
                        .setMessage(R.string.reset_db_confirm)
                        .setNegativeButton(android.R.string.cancel, null)
                        .setPositiveButton(android.R.string.ok, (dialog, which) -> {
                            MainApp.getDbHelper().resetDatabases();
                            // should be handled by Plugin-Interface and
                            // additional service interface and plugin registry
                            FoodPlugin.getPlugin().getService().resetFood();
                            TreatmentsPlugin.getPlugin().getService().resetTreatments();
                        })
                        .create()
                        .show();
                return true;
            case R.id.nav_export:
                ImportExportPrefs.verifyStoragePermissions(this);
                ImportExportPrefs.exportSharedPreferences(this);
                return true;
            case R.id.nav_import:
                ImportExportPrefs.verifyStoragePermissions(this);
                ImportExportPrefs.importSharedPreferences(this);
                return true;
            case R.id.nav_show_logcat:
                LogDialog.showLogcat(this);
                return true;
            case R.id.nav_about:
                AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle(MainApp.gs(R.string.app_name) + " " + BuildConfig.VERSION);
                if (Config.NSCLIENT || Config.G5UPLOADER)
                    builder.setIcon(R.mipmap.yellowowl);
                else
                    builder.setIcon(R.mipmap.blueowl);
                String message = "Build: " + BuildConfig.BUILDVERSION + "\n";
                message += "Flavor: " + BuildConfig.FLAVOR + BuildConfig.BUILD_TYPE + "\n";
                message += MainApp.gs(R.string.configbuilder_nightscoutversion_label) + " " + ConfigBuilderPlugin.nightscoutVersionName;
                if (MainApp.engineeringMode)
                    message += "\n" + MainApp.gs(R.string.engineering_mode_enabled);
                message += MainApp.gs(R.string.about_link_urls);
                final SpannableString messageSpanned = new SpannableString(message);
                Linkify.addLinks(messageSpanned, Linkify.WEB_URLS);
                builder.setMessage(messageSpanned);
                builder.setPositiveButton(MainApp.gs(R.string.ok), null);
                AlertDialog alertDialog = builder.create();
                alertDialog.show();
                ((TextView) alertDialog.findViewById(android.R.id.message)).setMovementMethod(LinkMovementMethod.getInstance());
                return true;
            case R.id.nav_exit:
                log.debug("Exiting");
                MainApp.instance().stopKeepAliveService();
                MainApp.bus().post(new EventAppExit());
                MainApp.closeDbHelper();
                finish();
                System.runFinalization();
                System.exit(0);
                return true;
            case R.id.nav_plugin_preferences:
                ViewPager viewPager = findViewById(R.id.pager);
                final PluginBase plugin = ((TabPageAdapter) viewPager.getAdapter()).getPluginAt(viewPager.getCurrentItem());
                PasswordProtection.QueryPassword(this, R.string.settings_password, "settings_password", () -> {
                    Intent i = new Intent(this, PreferencesActivity.class);
                    i.putExtra("id", plugin.getPreferencesId());
                    startActivity(i);
                }, null);
                return true;
        }
        return actionBarDrawerToggle.onOptionsItemSelected(item);
    }
}