/*
 * This is the source code of Telegram for Android v. 5.x.x
 * It is licensed under GNU GPL v. 2 or later.
 * You should have received a copy of the license in this archive (see LICENSE).
 *
 * Copyright Nikolai Kudashov, 2013-2018.
 */

package org.telegram.ui;

import android.content.Context;
import android.content.Intent;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;

import org.telegram.messenger.AndroidUtilities;
import org.telegram.messenger.ChatObject;
import org.telegram.messenger.LocaleController;
import org.telegram.messenger.NotificationCenter;
import org.telegram.messenger.ApplicationLoader;
import org.telegram.messenger.FileLog;
import org.telegram.messenger.R;
import org.telegram.tgnet.ConnectionsManager;
import org.telegram.tgnet.TLRPC;
import org.telegram.ui.ActionBar.ActionBar;
import org.telegram.ui.ActionBar.AlertDialog;
import org.telegram.ui.ActionBar.BaseFragment;
import org.telegram.ui.ActionBar.Theme;
import org.telegram.ui.ActionBar.ThemeDescription;
import org.telegram.ui.Cells.TextBlockCell;
import org.telegram.ui.Cells.TextInfoPrivacyCell;
import org.telegram.ui.Cells.TextSettingsCell;
import org.telegram.ui.Components.BulletinFactory;
import org.telegram.ui.Components.EmptyTextProgressView;
import org.telegram.ui.Components.LayoutHelper;
import org.telegram.ui.Components.RecyclerListView;

import java.util.ArrayList;

import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

public class GroupInviteActivity extends BaseFragment implements NotificationCenter.NotificationCenterDelegate {

    private ListAdapter listAdapter;
    private RecyclerListView listView;
    private EmptyTextProgressView emptyView;

    private long chatId;
    private boolean loading;
    private TLRPC.TL_chatInviteExported invite;

    private int linkRow;
    private int linkInfoRow;
    private int copyLinkRow;
    private int revokeLinkRow;
    private int shareLinkRow;
    private int shadowRow;
    private int rowCount;

    public GroupInviteActivity(long cid) {
        super();
        chatId = cid;
    }

    @Override
    public boolean onFragmentCreate() {
        super.onFragmentCreate();

        NotificationCenter.getInstance(currentAccount).addObserver(this, NotificationCenter.chatInfoDidLoad);
        getMessagesController().loadFullChat(chatId, classGuid, true);
        loading = true;

        rowCount = 0;
        linkRow = rowCount++;
        linkInfoRow = rowCount++;
        copyLinkRow = rowCount++;
        revokeLinkRow = rowCount++;
        shareLinkRow = rowCount++;
        shadowRow = rowCount++;

        return true;
    }

    @Override
    public void onFragmentDestroy() {
        NotificationCenter.getInstance(currentAccount).removeObserver(this, NotificationCenter.chatInfoDidLoad);
    }

    @Override
    public View createView(Context context) {
        actionBar.setBackButtonImage(R.drawable.ic_ab_back);
        actionBar.setAllowOverlayTitle(true);
        actionBar.setTitle(LocaleController.getString("InviteLink", R.string.InviteLink));
        actionBar.setActionBarMenuOnItemClick(new ActionBar.ActionBarMenuOnItemClick() {
            @Override
            public void onItemClick(int id) {
                if (id == -1) {
                    finishFragment();
                }
            }
        });

        listAdapter = new ListAdapter(context);

        fragmentView = new FrameLayout(context);
        FrameLayout frameLayout = (FrameLayout) fragmentView;
        frameLayout.setBackgroundColor(Theme.getColor(Theme.key_windowBackgroundGray));

        emptyView = new EmptyTextProgressView(context);
        emptyView.showProgress();
        frameLayout.addView(emptyView, LayoutHelper.createFrame(LayoutHelper.MATCH_PARENT, LayoutHelper.MATCH_PARENT, Gravity.TOP | Gravity.LEFT));

        listView = new RecyclerListView(context);
        listView.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false));
        listView.setEmptyView(emptyView);
        listView.setVerticalScrollBarEnabled(false);
        frameLayout.addView(listView, LayoutHelper.createFrame(LayoutHelper.MATCH_PARENT, LayoutHelper.MATCH_PARENT, Gravity.TOP | Gravity.LEFT));
        listView.setAdapter(listAdapter);
        listView.setOnItemClickListener((view, position) -> {
            if (getParentActivity() == null) {
                return;
            }
            if (position == copyLinkRow || position == linkRow) {
                if (invite == null) {
                    return;
                }
                try {
                    android.content.ClipboardManager clipboard = (android.content.ClipboardManager) ApplicationLoader.applicationContext.getSystemService(Context.CLIPBOARD_SERVICE);
                    android.content.ClipData clip = android.content.ClipData.newPlainText("label", invite.link);
                    clipboard.setPrimaryClip(clip);
                    BulletinFactory.createCopyLinkBulletin(this).show();
                } catch (Exception e) {
                    FileLog.e(e);
                }
            } else if (position == shareLinkRow) {
                if (invite == null) {
                    return;
                }
                try {
                    Intent intent = new Intent(Intent.ACTION_SEND);
                    intent.setType("text/plain");
                    intent.putExtra(Intent.EXTRA_TEXT, invite.link);
                    getParentActivity().startActivityForResult(Intent.createChooser(intent, LocaleController.getString("InviteToGroupByLink", R.string.InviteToGroupByLink)), 500);
                } catch (Exception e) {
                    FileLog.e(e);
                }
            } else if (position == revokeLinkRow) {
                AlertDialog.Builder builder = new AlertDialog.Builder(getParentActivity());
                builder.setMessage(LocaleController.getString("RevokeAlert", R.string.RevokeAlert));
                builder.setTitle(LocaleController.getString("RevokeLink", R.string.RevokeLink));
                builder.setPositiveButton(LocaleController.getString("RevokeButton", R.string.RevokeButton), (dialogInterface, i) -> generateLink(true));
                builder.setNegativeButton(LocaleController.getString("Cancel", R.string.Cancel), null);
                showDialog(builder.create());
            }
        });

        return fragmentView;
    }

    @Override
    public void didReceivedNotification(int id, int account, Object... args) {
        if (id == NotificationCenter.chatInfoDidLoad) {
            TLRPC.ChatFull info = (TLRPC.ChatFull) args[0];
            int guid = (int) args[1];
            if (info.id == chatId && guid == classGuid) {
                invite = getMessagesController().getExportedInvite(chatId);
                if (invite == null) {
                    generateLink(false);
                } else {
                    loading = false;
                    if (listAdapter != null) {
                        listAdapter.notifyDataSetChanged();
                    }
                }
            }
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        if (listAdapter != null) {
            listAdapter.notifyDataSetChanged();
        }
    }

    private void generateLink(final boolean newRequest) {
        loading = true;
        TLRPC.TL_messages_exportChatInvite req = new TLRPC.TL_messages_exportChatInvite();
        req.peer = getMessagesController().getInputPeer(-chatId);
        final int reqId = ConnectionsManager.getInstance(currentAccount).sendRequest(req, (response, error) -> AndroidUtilities.runOnUIThread(() -> {
            if (error == null) {
                invite = (TLRPC.TL_chatInviteExported) response;
                if (newRequest) {
                    if (getParentActivity() == null) {
                        return;
                    }
                    AlertDialog.Builder builder = new AlertDialog.Builder(getParentActivity());
                    builder.setMessage(LocaleController.getString("RevokeAlertNewLink", R.string.RevokeAlertNewLink));
                    builder.setTitle(LocaleController.getString("RevokeLink", R.string.RevokeLink));
                    builder.setNegativeButton(LocaleController.getString("OK", R.string.OK), null);
                    showDialog(builder.create());
                }
            }
            loading = false;
            listAdapter.notifyDataSetChanged();
        }));
        ConnectionsManager.getInstance(currentAccount).bindRequestToGuid(reqId, classGuid);
        if (listAdapter != null) {
            listAdapter.notifyDataSetChanged();
        }
    }

    private class ListAdapter extends RecyclerListView.SelectionAdapter {
        
        private Context mContext;

        public ListAdapter(Context context) {
            mContext = context;
        }

        @Override
        public boolean isEnabled(RecyclerView.ViewHolder holder) {
            int position = holder.getAdapterPosition();
            return position == revokeLinkRow || position == copyLinkRow || position == shareLinkRow || position == linkRow;
        }

        @Override
        public int getItemCount() {
            return loading ? 0 : rowCount;
        }

        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view;
            switch (viewType) {
                case 0:
                    view = new TextSettingsCell(mContext);
                    view.setBackgroundColor(Theme.getColor(Theme.key_windowBackgroundWhite));
                    break;
                case 1:
                    view = new TextInfoPrivacyCell(mContext);
                    break;
                case 2:
                default:
                    view = new TextBlockCell(mContext);
                    view.setBackgroundColor(Theme.getColor(Theme.key_windowBackgroundWhite));
                    break;
            }
            return new RecyclerListView.Holder(view);
        }

        @Override
        public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
            switch (holder.getItemViewType()) {
                case 0:
                    TextSettingsCell textCell = (TextSettingsCell) holder.itemView;
                    if (position == copyLinkRow) {
                        textCell.setText(LocaleController.getString("CopyLink", R.string.CopyLink), true);
                    } else if (position == shareLinkRow) {
                        textCell.setText(LocaleController.getString("ShareLink", R.string.ShareLink), false);
                    } else if (position == revokeLinkRow) {
                        textCell.setText(LocaleController.getString("RevokeLink", R.string.RevokeLink), true);
                    }
                    break;
                case 1:
                    TextInfoPrivacyCell privacyCell = (TextInfoPrivacyCell) holder.itemView;
                    if (position == shadowRow) {
                        privacyCell.setText("");
                        privacyCell.setBackgroundDrawable(Theme.getThemedDrawable(mContext, R.drawable.greydivider_bottom, Theme.key_windowBackgroundGrayShadow));
                    } else if (position == linkInfoRow) {
                        TLRPC.Chat chat = getMessagesController().getChat(chatId);
                        if (ChatObject.isChannel(chat) && !chat.megagroup) {
                            privacyCell.setText(LocaleController.getString("ChannelLinkInfo", R.string.ChannelLinkInfo));
                        } else {
                            privacyCell.setText(LocaleController.getString("LinkInfo", R.string.LinkInfo));
                        }
                        privacyCell.setBackgroundDrawable(Theme.getThemedDrawable(mContext, R.drawable.greydivider, Theme.key_windowBackgroundGrayShadow));
                    }
                    break;
                case 2:
                    TextBlockCell textBlockCell = (TextBlockCell) holder.itemView;
                    textBlockCell.setText(invite != null ? invite.link : "error", false);
                    break;
            }
        }

        @Override
        public int getItemViewType(int position) {
            if (position == copyLinkRow || position == shareLinkRow || position == revokeLinkRow) {
                return 0;
            } else if (position == shadowRow || position == linkInfoRow) {
                return 1;
            } else if (position == linkRow) {
                return 2;
            }
            return 0;
        }
    }

    @Override
    public ArrayList<ThemeDescription> getThemeDescriptions() {
        ArrayList<ThemeDescription> themeDescriptions = new ArrayList<>();

        themeDescriptions.add(new ThemeDescription(listView, ThemeDescription.FLAG_CELLBACKGROUNDCOLOR, new Class[]{TextSettingsCell.class, TextBlockCell.class}, null, null, null, Theme.key_windowBackgroundWhite));
        themeDescriptions.add(new ThemeDescription(fragmentView, ThemeDescription.FLAG_BACKGROUND, null, null, null, null, Theme.key_windowBackgroundGray));

        themeDescriptions.add(new ThemeDescription(actionBar, ThemeDescription.FLAG_BACKGROUND, null, null, null, null, Theme.key_actionBarDefault));
        themeDescriptions.add(new ThemeDescription(listView, ThemeDescription.FLAG_LISTGLOWCOLOR, null, null, null, null, Theme.key_actionBarDefault));
        themeDescriptions.add(new ThemeDescription(actionBar, ThemeDescription.FLAG_AB_ITEMSCOLOR, null, null, null, null, Theme.key_actionBarDefaultIcon));
        themeDescriptions.add(new ThemeDescription(actionBar, ThemeDescription.FLAG_AB_TITLECOLOR, null, null, null, null, Theme.key_actionBarDefaultTitle));
        themeDescriptions.add(new ThemeDescription(actionBar, ThemeDescription.FLAG_AB_SELECTORCOLOR, null, null, null, null, Theme.key_actionBarDefaultSelector));

        themeDescriptions.add(new ThemeDescription(listView, ThemeDescription.FLAG_SELECTOR, null, null, null, null, Theme.key_listSelector));

        themeDescriptions.add(new ThemeDescription(listView, 0, new Class[]{View.class}, Theme.dividerPaint, null, null, Theme.key_divider));

        themeDescriptions.add(new ThemeDescription(emptyView, ThemeDescription.FLAG_PROGRESSBAR, null, null, null, null, Theme.key_progressCircle));

        themeDescriptions.add(new ThemeDescription(listView, 0, new Class[]{TextSettingsCell.class}, new String[]{"textView"}, null, null, null, Theme.key_windowBackgroundWhiteBlackText));

        themeDescriptions.add(new ThemeDescription(listView, ThemeDescription.FLAG_BACKGROUNDFILTER, new Class[]{TextInfoPrivacyCell.class}, null, null, null, Theme.key_windowBackgroundGrayShadow));
        themeDescriptions.add(new ThemeDescription(listView, 0, new Class[]{TextInfoPrivacyCell.class}, new String[]{"textView"}, null, null, null, Theme.key_windowBackgroundWhiteGrayText4));

        themeDescriptions.add(new ThemeDescription(listView, 0, new Class[]{TextBlockCell.class}, new String[]{"textView"}, null, null, null, Theme.key_windowBackgroundWhiteBlackText));

        return themeDescriptions;
    }
}