package de.pixart.messenger.entities;

import android.annotation.SuppressLint;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import de.pixart.messenger.Config;
import de.pixart.messenger.R;
import de.pixart.messenger.utils.JidHelper;
import de.pixart.messenger.utils.Namespace;
import de.pixart.messenger.utils.UIHelper;
import de.pixart.messenger.xmpp.chatstate.ChatState;
import de.pixart.messenger.xmpp.forms.Data;
import de.pixart.messenger.xmpp.forms.Field;
import de.pixart.messenger.xmpp.jid.InvalidJidException;
import de.pixart.messenger.xmpp.jid.Jid;
import de.pixart.messenger.xmpp.pep.Avatar;

@SuppressLint("DefaultLocale")
public class MucOptions {

    private boolean mAutoPushConfiguration = true;

    public Account getAccount() {
        return this.conversation.getAccount();
    }

    public void setSelf(User user) {
        this.self = user;
    }

    public void changeAffiliation(Jid jid, Affiliation affiliation) {
        User user = findUserByRealJid(jid);
        synchronized (users) {
            if (user != null && user.getRole() == Role.NONE) {
                users.remove(user);
                if (affiliation.ranks(Affiliation.MEMBER)) {
                    user.affiliation = affiliation;
                    users.add(user);
                }
            }
        }
    }

    public void flagNoAutoPushConfiguration() {
        mAutoPushConfiguration = false;
    }

    public boolean autoPushConfiguration() {
        return mAutoPushConfiguration;
    }

    public boolean isSelf(Jid counterpart) {
        return counterpart.getResourcepart().equals(getActualNick());
    }

    public void resetChatState() {
        synchronized (users) {
            for (User user : users) {
                user.chatState = Config.DEFAULT_CHATSTATE;
            }
        }
    }

    public enum Affiliation {
        OWNER("owner", 4, R.string.owner),
        ADMIN("admin", 3, R.string.admin),
        MEMBER("member", 2, R.string.member),
        OUTCAST("outcast", 0, R.string.outcast),
        NONE("none", 1, R.string.no_affiliation);

        Affiliation(String string, int rank, int resId) {
            this.string = string;
            this.resId = resId;
            this.rank = rank;
        }

        private String string;
        private int resId;
        private int rank;

        public int getResId() {
            return resId;
        }

        @Override
        public String toString() {
            return this.string;
        }

        public boolean outranks(Affiliation affiliation) {
            return rank > affiliation.rank;
        }

        public boolean ranks(Affiliation affiliation) {
            return rank >= affiliation.rank;
        }
    }

    public enum Role {
        MODERATOR("moderator", R.string.moderator, 3),
        VISITOR("visitor", R.string.visitor, 1),
        PARTICIPANT("participant", R.string.participant, 2),
        NONE("none", R.string.no_role, 0);

        Role(String string, int resId, int rank) {
            this.string = string;
            this.resId = resId;
            this.rank = rank;
        }

        private String string;
        private int resId;
        private int rank;

        public int getResId() {
            return resId;
        }

        @Override
        public String toString() {
            return this.string;
        }

        public boolean ranks(Role role) {
            return rank >= role.rank;
        }
    }

    public enum Error {
        NO_RESPONSE,
        SERVER_NOT_FOUND,
        NONE,
        NICK_IN_USE,
        PASSWORD_REQUIRED,
        BANNED,
        MEMBERS_ONLY,
        KICKED,
        SHUTDOWN,
        UNKNOWN
    }

    public static final String STATUS_CODE_SELF_PRESENCE = "110";
    public static final String STATUS_CODE_ROOM_CREATED = "201";
    public static final String STATUS_CODE_BANNED = "301";
    public static final String STATUS_CODE_CHANGED_NICK = "303";
    public static final String STATUS_CODE_KICKED = "307";
    public static final String STATUS_CODE_AFFILIATION_CHANGE = "321";
    public static final String STATUS_CODE_LOST_MEMBERSHIP = "322";
    public static final String STATUS_CODE_SHUTDOWN = "332";

    private interface OnEventListener {
        void onSuccess();

        void onFailure();
    }

    public interface OnRenameListener extends OnEventListener {

    }

    public static class User implements Comparable<User> {
        private Role role = Role.NONE;
        private Affiliation affiliation = Affiliation.NONE;
        private Jid realJid;
        private Jid fullJid;
        private long pgpKeyId = 0;
        private Avatar avatar;
        private MucOptions options;
        private ChatState chatState = Config.DEFAULT_CHATSTATE;

        public User(MucOptions options, Jid from) {
            this.options = options;
            this.fullJid = from;
        }

        public String getName() {
            return fullJid == null ? null : fullJid.getResourcepart();
        }

        public void setRealJid(Jid jid) {
            this.realJid = jid != null ? jid.toBareJid() : null;
        }

        public Role getRole() {
            return this.role;
        }

        public void setRole(String role) {
            if (role == null) {
                this.role = Role.NONE;
                return;
            }
            role = role.toLowerCase();
            switch (role) {
                case "moderator":
                    this.role = Role.MODERATOR;
                    break;
                case "participant":
                    this.role = Role.PARTICIPANT;
                    break;
                case "visitor":
                    this.role = Role.VISITOR;
                    break;
                default:
                    this.role = Role.NONE;
                    break;
            }
        }

        public Affiliation getAffiliation() {
            return this.affiliation;
        }

        public void setAffiliation(String affiliation) {
            if (affiliation == null) {
                this.affiliation = Affiliation.NONE;
                return;
            }
            affiliation = affiliation.toLowerCase();
            switch (affiliation) {
                case "admin":
                    this.affiliation = Affiliation.ADMIN;
                    break;
                case "owner":
                    this.affiliation = Affiliation.OWNER;
                    break;
                case "member":
                    this.affiliation = Affiliation.MEMBER;
                    break;
                case "outcast":
                    this.affiliation = Affiliation.OUTCAST;
                    break;
                default:
                    this.affiliation = Affiliation.NONE;
            }
        }

        public void setPgpKeyId(long id) {
            this.pgpKeyId = id;
        }

        public long getPgpKeyId() {
            if (this.pgpKeyId != 0) {
                return this.pgpKeyId;
            } else if (realJid != null) {
                return getAccount().getRoster().getContact(realJid).getPgpKeyId();
            } else {
                return 0;
            }
        }

        public Contact getContact() {
            if (fullJid != null) {
                return getAccount().getRoster().getContactFromRoster(realJid);
            } else if (realJid != null) {
                return getAccount().getRoster().getContact(realJid);
            } else {
                return null;
            }
        }

        public boolean setAvatar(Avatar avatar) {
            if (this.avatar != null && this.avatar.equals(avatar)) {
                return false;
            } else {
                this.avatar = avatar;
                return true;
            }
        }

        public String getAvatar() {
            return avatar == null ? null : avatar.getFilename();
        }

        public Account getAccount() {
            return options.getAccount();
        }

        public Conversation getConversation() {
            return options.getConversation();
        }

        public Jid getFullJid() {
            return fullJid;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;

            User user = (User) o;

            if (role != user.role) return false;
            if (affiliation != user.affiliation) return false;
            if (realJid != null ? !realJid.equals(user.realJid) : user.realJid != null)
                return false;
            return fullJid != null ? fullJid.equals(user.fullJid) : user.fullJid == null;

        }

        @Override
        public int hashCode() {
            int result = role != null ? role.hashCode() : 0;
            result = 31 * result + (affiliation != null ? affiliation.hashCode() : 0);
            result = 31 * result + (realJid != null ? realJid.hashCode() : 0);
            result = 31 * result + (fullJid != null ? fullJid.hashCode() : 0);
            return result;
        }

        @Override
        public String toString() {
            return "[fulljid:" + String.valueOf(fullJid) + ",realjid:" + String.valueOf(realJid) + ",affiliation" + affiliation.toString() + "]";
        }

        public boolean realJidMatchesAccount() {
            return realJid != null && realJid.equals(options.account.getJid().toBareJid());
        }

        @Override
        public int compareTo(User another) {
            if (another.getAffiliation().outranks(getAffiliation())) {
                return 1;
            } else if (getAffiliation().outranks(another.getAffiliation())) {
                return -1;
            } else {
                return getComparableName().compareToIgnoreCase(another.getComparableName());
            }
        }


        private String getComparableName() {
            Contact contact = getContact();
            if (contact != null) {
                return contact.getDisplayName();
            } else {
                String name = getName();
                return name == null ? "" : name;
            }
        }

        public Jid getRealJid() {
            return realJid;
        }

        public boolean setChatState(ChatState chatState) {
            if (this.chatState == chatState) {
                return false;
            }
            this.chatState = chatState;
            return true;
        }
    }

    private Account account;
    private final Set<User> users = new HashSet<>();
    private final List<String> features = new ArrayList<>();
    private Data form = new Data();
    private Conversation conversation;
    private boolean isOnline = false;
    private Error error = Error.NONE;
    public OnRenameListener onRenameListener = null;
    private User self;
    private String subject = null;
    private String password = null;

    public MucOptions(Conversation conversation) {
        this.account = conversation.getAccount();
        this.conversation = conversation;
        this.self = new User(this, createJoinJid(getProposedNick()));
    }

    public void updateFeatures(ArrayList<String> features) {
        this.features.clear();
        this.features.addAll(features);
    }

    public void updateFormData(Data form) {
        this.form = form;
    }

    public boolean hasFeature(String feature) {
        return this.features.contains(feature);
    }

    public boolean canInvite() {
        Field field = this.form.getFieldByName("muc#roomconfig_allowinvites");
        return !membersOnly() || self.getRole().ranks(Role.MODERATOR) || (field != null && "1".equals(field.getValue()));
    }

    public boolean canChangeSubject() {
        Field field = this.form.getFieldByName("muc#roomconfig_changesubject");
        return self.getRole().ranks(Role.MODERATOR) || (field != null && "1".equals(field.getValue()));
    }

    public boolean participating() {
        return !online()
                || self.getRole().ranks(Role.PARTICIPANT)
                || hasFeature("muc_unmoderated");
    }

    public boolean membersOnly() {
        return hasFeature("muc_membersonly");
    }

    public boolean mamSupport() {
        return hasFeature(Namespace.MAM) || hasFeature(Namespace.MAM_LEGACY);
    }

    public boolean mamLegacy() {
        return hasFeature(Namespace.MAM_LEGACY) && !hasFeature(Namespace.MAM);
    }

    public boolean nonanonymous() {
        return hasFeature("muc_nonanonymous");
    }

    public boolean persistent() {
        return hasFeature("muc_persistent");
    }

    public boolean moderated() {
        return hasFeature("muc_moderated");
    }

    public User deleteUser(Jid jid) {
        User user = findUserByFullJid(jid);
        if (user != null) {
            synchronized (users) {
                users.remove(user);
                boolean realJidInMuc = false;
                for (User u : users) {
                    if (user.realJid != null && user.realJid.equals(u.realJid)) {
                        realJidInMuc = true;
                        break;
                    }
                }
                boolean self = user.realJid != null && user.realJid.equals(account.getJid().toBareJid());
                if (membersOnly()
                        && nonanonymous()
                        && user.affiliation.ranks(Affiliation.MEMBER)
                        && user.realJid != null
                        && !realJidInMuc
                        && !self) {
                    user.role = Role.NONE;
                    user.avatar = null;
                    user.fullJid = null;
                    users.add(user);
                }
            }
        }
        return user;
    }

    //returns true if real jid was new;
    public boolean updateUser(User user) {
        User old;
        boolean realJidFound = false;
        if (user.fullJid == null && user.realJid != null) {
            old = findUserByRealJid(user.realJid);
            realJidFound = old != null;
            if (old != null) {
                if (old.fullJid != null) {
                    return false; //don't add. user already exists
                } else {
                    synchronized (users) {
                        users.remove(old);
                    }
                }
            }
        } else if (user.realJid != null) {
            old = findUserByRealJid(user.realJid);
            realJidFound = old != null;
            synchronized (users) {
                if (old != null && old.fullJid == null) {
                    users.remove(old);
                }
            }
        }
        old = findUserByFullJid(user.getFullJid());
        synchronized (this.users) {
            if (old != null) {
                users.remove(old);
            }
            boolean fullJidIsSelf = isOnline && user.getFullJid() != null && user.getFullJid().equals(self.getFullJid());
            if ((!membersOnly() || user.getAffiliation().ranks(Affiliation.MEMBER))
                    && user.getAffiliation().outranks(Affiliation.OUTCAST)
                    && !fullJidIsSelf) {
                this.users.add(user);
                return !realJidFound && user.realJid != null;
            }
        }
        return false;
    }

    public User findUserByFullJid(Jid jid) {
        if (jid == null) {
            return null;
        }
        synchronized (users) {
            for (User user : users) {
                if (jid.equals(user.getFullJid())) {
                    return user;
                }
            }
        }
        return null;
    }

    private User findUserByRealJid(Jid jid) {
        if (jid == null) {
            return null;
        }
        synchronized (users) {
            for (User user : users) {
                if (jid.equals(user.realJid)) {
                    return user;
                }
            }
        }
        return null;
    }

    public User findUser(ReadByMarker readByMarker) {
        if (readByMarker.getRealJid() != null) {
            User user = findUserByRealJid(readByMarker.getRealJid().toBareJid());
            if (user == null) {
                user = new User(this, readByMarker.getFullJid());
                user.setRealJid(readByMarker.getRealJid());
            }
            return user;
        } else if (readByMarker.getFullJid() != null) {
            return findUserByFullJid(readByMarker.getFullJid());
        } else {
            return null;
        }
    }

    public boolean isContactInRoom(Contact contact) {
        return findUserByRealJid(contact.getJid().toBareJid()) != null;
    }

    public boolean isUserInRoom(Jid jid) {
        return findUserByFullJid(jid) != null;
    }

    public void setError(Error error) {
        this.isOnline = isOnline && error == Error.NONE;
        this.error = error;
    }

    public void setOnline() {
        this.isOnline = true;
    }

    public ArrayList<User> getUsers() {
        return getUsers(true);
    }

    public ArrayList<User> getUsers(boolean includeOffline) {
        synchronized (users) {
            if (includeOffline) {
                return new ArrayList<>(users);
            } else {
                ArrayList<User> onlineUsers = new ArrayList<>();
                for (User user : users) {
                    if (user.getRole().ranks(Role.PARTICIPANT)) {
                        onlineUsers.add(user);
                    }
                }
                return onlineUsers;
            }
        }
    }

    public ArrayList<User> getUsersWithChatState(ChatState state, int max) {
        synchronized (users) {
            ArrayList<User> list = new ArrayList<>();
            for (User user : users) {
                if (user.chatState == state) {
                    list.add(user);
                    if (list.size() >= max) {
                        break;
                    }
                }
            }
            return list;
        }
    }

    public List<User> getUsers(int max) {
        ArrayList<User> subset = new ArrayList<>();
        HashSet<Jid> jids = new HashSet<>();
        jids.add(account.getJid().toBareJid());
        synchronized (users) {
            for(User user : users) {
                if (user.getRealJid() == null || jids.add(user.getRealJid())) {
                    subset.add(user);
                }
                if (subset.size() >= max) {
                    break;
                }
            }
        }
        return subset;
    }

    public int getUserCount() {
        synchronized (users) {
            return users.size();
        }
    }

    public String getProposedNick() {
        if (conversation.getBookmark() != null
                && conversation.getBookmark().getNick() != null
                && !conversation.getBookmark().getNick().trim().isEmpty()) {
            return conversation.getBookmark().getNick().trim();
        } else if (!conversation.getJid().isBareJid()) {
            return conversation.getJid().getResourcepart();
        } else {
            return JidHelper.localPartOrFallback(account.getJid());
        }
    }

    public String getActualNick() {
        if (this.self.getName() != null) {
            return this.self.getName();
        } else {
            return this.getProposedNick();
        }
    }

    public boolean online() {
        return this.isOnline;
    }

    public Error getError() {
        return this.error;
    }

    public void setOnRenameListener(OnRenameListener listener) {
        this.onRenameListener = listener;
    }

    public void setOffline() {
        synchronized (users) {
            this.users.clear();
        }
        this.error = Error.NO_RESPONSE;
        this.isOnline = false;
    }

    public User getSelf() {
        return self;
    }

    public void setSubject(String content) {
        this.subject = content;
    }

    public String getSubject() {
        return this.subject;
    }

    public int NumberOfUsers() {
        if (users.size() >= 1) {
            return users.size();
        } else {
            return 0;
        }
    }



    public String createNameFromParticipants() {
        if (users.size() >= 1) {
            StringBuilder builder = new StringBuilder();
            for (User user : getUsers(5)) {
                if (builder.length() != 0) {
                    builder.append(", ");
                }
                String name = UIHelper.getDisplayName(user);
                if (name != null) {
                    builder.append(name.split("\\s+")[0]);
                }
            }
            return builder.toString();
        } else {
            return null;
        }
    }

    public long[] getPgpKeyIds() {
        List<Long> ids = new ArrayList<>();
        for (User user : this.users) {
            if (user.getPgpKeyId() != 0) {
                ids.add(user.getPgpKeyId());
            }
        }
        ids.add(account.getPgpId());
        long[] primitiveLongArray = new long[ids.size()];
        for (int i = 0; i < ids.size(); ++i) {
            primitiveLongArray[i] = ids.get(i);
        }
        return primitiveLongArray;
    }

    public boolean pgpKeysInUse() {
        synchronized (users) {
            for (User user : users) {
                if (user.getPgpKeyId() != 0) {
                    return true;
                }
            }
        }
        return false;
    }

    public boolean everybodyHasKeys() {
        synchronized (users) {
            for (User user : users) {
                if (user.getPgpKeyId() == 0) {
                    return false;
                }
            }
        }
        return true;
    }

    public Jid createJoinJid(String nick) {
        try {
            return Jid.fromString(this.conversation.getJid().toBareJid().toString() + "/" + nick);
        } catch (final InvalidJidException e) {
            return null;
        }
    }

    public Jid getTrueCounterpart(Jid jid) {
        if (jid.equals(getSelf().getFullJid())) {
            return account.getJid().toBareJid();
        }
        User user = findUserByFullJid(jid);
        return user == null ? null : user.realJid;
    }

    public String getPassword() {
        this.password = conversation.getAttribute(Conversation.ATTRIBUTE_MUC_PASSWORD);
        if (this.password == null && conversation.getBookmark() != null
                && conversation.getBookmark().getPassword() != null) {
            return conversation.getBookmark().getPassword();
        } else {
            return this.password;
        }
    }

    public void setPassword(String password) {
        if (conversation.getBookmark() != null) {
            conversation.getBookmark().setPassword(password);
        } else {
            this.password = password;
        }
        conversation.setAttribute(Conversation.ATTRIBUTE_MUC_PASSWORD, password);
    }

    public Conversation getConversation() {
        return this.conversation;
    }

    public List<Jid> getMembers() {
        ArrayList<Jid> members = new ArrayList<>();
        synchronized (users) {
            for (User user : users) {
                if (user.affiliation.ranks(Affiliation.MEMBER) && user.realJid != null) {
                    members.add(user.realJid);
                }
            }
        }
        return members;
    }
}