package com.jsbogang.womp.android;

import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

import androidx.activity.OnBackPressedCallback;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.Fragment;

import com.google.android.material.appbar.MaterialToolbar;
import com.google.android.material.bottomnavigation.BottomNavigationView;
import com.jsbogang.womp.health.ActiveMeasureRunner;
import com.jsbogang.womp.health.HealthFragment;
import com.jsbogang.womp.health.HealthSyncer;
import com.jsbogang.womp.health.HealthUploader;
import com.jsbogang.womp.workbench.WompKeepAliveService;
import com.jsbogang.womp.workbench.WompSession;
import com.jsbogang.womp.workbench.WompWorkbenchFragment;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private static final String TAG = "MainActivity";
    private View workbenchContainer;
    private View healthContainer;
    private WompWorkbenchFragment workbenchFragment;
    private long lastBackPressedAt;
    private boolean switchingTab;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        HealthSyncer.get().attach(this);
        HealthUploader.get().attach(this);
        ActiveMeasureRunner.get().attach(this);

        MaterialToolbar toolbar = findViewById(R.id.toolbar);
        toolbar.setTitle(R.string.app_name);
        toolbar.setTitleCentered(true);
        workbenchContainer = findViewById(R.id.workbench_container);
        healthContainer = findViewById(R.id.health_container);

        if (savedInstanceState == null) {
            workbenchFragment = new WompWorkbenchFragment();
            getSupportFragmentManager().beginTransaction()
                    .replace(R.id.workbench_container, workbenchFragment, "womp_workbench")
                    .commit();
        } else {
            workbenchFragment = (WompWorkbenchFragment) getSupportFragmentManager()
                    .findFragmentByTag("womp_workbench");
        }

        BottomNavigationView nav = findViewById(R.id.bottom_nav);
        nav.setOnItemSelectedListener(item -> {
            if (switchingTab) {
                return true;
            }
            if (item.getItemId() == R.id.nav_workbench) {
                showWorkbenchTab();
                return true;
            }
            if (item.getItemId() == R.id.nav_health) {
                try {
                    showHealthTab();
                    return true;
                } catch (Throwable t) {
                    Log.e(TAG, "open health tab failed", t);
                    Toast.makeText(this, "健康页打开失败: " + t.getMessage(), Toast.LENGTH_LONG).show();
                    return false;
                }
            }
            return false;
        });

        getOnBackPressedDispatcher().addCallback(this, new OnBackPressedCallback(true) {
            @Override
            public void handleOnBackPressed() {
                if (healthContainer.getVisibility() == View.VISIBLE) {
                    switchingTab = true;
                    nav.setSelectedItemId(R.id.nav_workbench);
                    switchingTab = false;
                    showWorkbenchTab();
                    return;
                }
                if (workbenchFragment != null && workbenchFragment.goBack()) {
                    return;
                }
                long now = System.currentTimeMillis();
                if (now - lastBackPressedAt < 2000) {
                    finish();
                    return;
                }
                lastBackPressedAt = now;
                Toast.makeText(MainActivity.this, R.string.womp_press_again_to_exit, Toast.LENGTH_SHORT).show();
            }
        });

        requestRuntimePermissions();
        WompKeepAliveService.start(this);
    }

    public void showHealthTab() {
        ensureHealthFragment();
        // 不要把工作台 WebView 设为 GONE，部分机型会直接 native crash 且没有 Java 堆栈
        workbenchContainer.setVisibility(View.INVISIBLE);
        healthContainer.setVisibility(View.VISIBLE);
        healthContainer.bringToFront();
        HealthSyncer.get().syncAll(false);
        BottomNavigationView nav = findViewById(R.id.bottom_nav);
        if (nav.getSelectedItemId() != R.id.nav_health) {
            switchingTab = true;
            nav.setSelectedItemId(R.id.nav_health);
            switchingTab = false;
        }
    }

    public void showWorkbenchTab() {
        healthContainer.setVisibility(View.GONE);
        workbenchContainer.setVisibility(View.VISIBLE);
        workbenchContainer.bringToFront();
    }

    private void ensureHealthFragment() {
        Fragment existing = getSupportFragmentManager().findFragmentByTag("health");
        if (existing != null) {
            return;
        }
        getSupportFragmentManager().beginTransaction()
                .replace(R.id.health_container, new HealthFragment(), "health")
                .commitNowAllowingStateLoss();
    }

    private void requestRuntimePermissions() {
        List<String> need = new ArrayList<>();
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            need.add(Manifest.permission.ACCESS_FINE_LOCATION);
            need.add(Manifest.permission.ACCESS_COARSE_LOCATION);
        }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
            if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_SCAN) != PackageManager.PERMISSION_GRANTED) {
                need.add(Manifest.permission.BLUETOOTH_SCAN);
            }
            if (ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
                need.add(Manifest.permission.BLUETOOTH_CONNECT);
            }
        }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU
                && ContextCompat.checkSelfPermission(this, Manifest.permission.POST_NOTIFICATIONS) != PackageManager.PERMISSION_GRANTED) {
            need.add(Manifest.permission.POST_NOTIFICATIONS);
        }
        if (!need.isEmpty()) {
            ActivityCompat.requestPermissions(this, need.toArray(new String[0]), 1001);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (WompSession.isLoggedIn(this)) {
            WompKeepAliveService.start(this);
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        Fragment f = getSupportFragmentManager().findFragmentByTag("womp_workbench");
        if (f instanceof WompWorkbenchFragment) {
            workbenchFragment = (WompWorkbenchFragment) f;
        }
        WompKeepAliveService.start(this, true);
        Fragment health = getSupportFragmentManager().findFragmentByTag("health");
        if (health instanceof HealthFragment) {
            ((HealthFragment) health).reloadFromLocal();
        }
    }
}