// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause

package com.tailscale.ipn;

import android.app.Activity;
import android.content.res.AssetFileDescriptor;
import android.content.res.Configuration;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.OpenableColumns;
import android.net.Uri;
import android.content.pm.PackageManager;

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

import org.gioui.GioView;

public final class IPNActivity extends Activity {
	final static int WRITE_STORAGE_RESULT = 1000;

	private GioView view;

	@Override public void onCreate(Bundle state) {
		super.onCreate(state);
		view = new GioView(this);
		setContentView(view);
		handleIntent();
	}

	@Override public void onNewIntent(Intent i) {
		setIntent(i);
		handleIntent();
	}

	private void handleIntent() {
		Intent it = getIntent();
		String act = it.getAction();
		String[] texts;
		Uri[] uris;
		if (Intent.ACTION_SEND.equals(act)) {
			uris = new Uri[]{it.getParcelableExtra(Intent.EXTRA_STREAM)};
			texts = new String[]{it.getStringExtra(Intent.EXTRA_TEXT)};
		} else if (Intent.ACTION_SEND_MULTIPLE.equals(act)) {
			List<Uri> extraUris = it.getParcelableArrayListExtra(Intent.EXTRA_STREAM);
			uris = extraUris.toArray(new Uri[0]);
			texts = new String[uris.length];
		} else {
			return;
		}
		String mime = it.getType();
		int nitems = uris.length;
		String[] items = new String[nitems];
		String[] mimes = new String[nitems];
		int[] types = new int[nitems];
		String[] names = new String[nitems];
		long[] sizes = new long[nitems];
		int nfiles = 0;
		for (int i = 0; i < uris.length; i++) {
			String text = texts[i];
			Uri uri = uris[i];
			if (text != null) {
				types[nfiles] = 1; // FileTypeText
				names[nfiles] = "file.txt";
				mimes[nfiles] = mime;
				items[nfiles] = text;
				// Determined by len(text) in Go to eliminate UTF-8 encoding differences.
				sizes[nfiles] = 0;
				nfiles++;
			} else if (uri != null) {
				Cursor c = getContentResolver().query(uri, null, null, null, null);
				if (c == null) {
					// Ignore files we have no permission to access.
					continue;
				}
				int nameCol = c.getColumnIndex(OpenableColumns.DISPLAY_NAME);
				int sizeCol = c.getColumnIndex(OpenableColumns.SIZE);
				c.moveToFirst();
				String name = c.getString(nameCol);
				long size = c.getLong(sizeCol);
				types[nfiles] = 2; // FileTypeURI
				mimes[nfiles] = mime;
				items[nfiles] = uri.toString();
				names[nfiles] = name;
				sizes[nfiles] = size;
				nfiles++;
			}
		}
		App.onShareIntent(nfiles, types, mimes, items, names, sizes);
	}

	@Override public void onRequestPermissionsResult(int reqCode, String[] perms, int[] grants) {
		switch (reqCode) {
		case WRITE_STORAGE_RESULT:
			if (grants.length > 0 && grants[0] == PackageManager.PERMISSION_GRANTED) {
				App.onWriteStorageGranted();
			}
		}
	}

	@Override public void onDestroy() {
		view.destroy();
		super.onDestroy();
	}

	@Override public void onStart() {
		super.onStart();
		view.start();
	}

	@Override public void onStop() {
		view.stop();
		super.onStop();
	}

	@Override public void onConfigurationChanged(Configuration c) {
		super.onConfigurationChanged(c);
		view.configurationChanged();
	}

	@Override public void onLowMemory() {
		super.onLowMemory();
		view.onLowMemory();
	}

	@Override public void onBackPressed() {
		if (!view.backPressed())
			super.onBackPressed();
	}
}