package net.frozenorb.apiv3.model;

import com.mongodb.async.SingleResultCallback;
import com.mongodb.async.client.MongoCollection;
import com.mongodb.client.result.UpdateResult;
import fr.javatic.mongo.jacksonCodec.Entity;
import fr.javatic.mongo.jacksonCodec.objectId.Id;
import lombok.AllArgsConstructor;
import lombok.Getter;
import net.frozenorb.apiv3.APIv3;
import net.frozenorb.apiv3.actor.Actor;
import net.frozenorb.apiv3.actor.ActorType;
import net.frozenorb.apiv3.unsorted.BlockingCallback;
import net.frozenorb.apiv3.util.SyncUtils;
import net.frozenorb.apiv3.util.TimeUtils;
import org.bson.Document;
import org.bson.types.ObjectId;

import java.time.Instant;
import java.util.*;
import java.util.stream.Collectors;

@Entity
@AllArgsConstructor
public final class Punishment {

    private static final MongoCollection<Punishment> punishmentsCollection = APIv3.getDatabase().getCollection("punishments", Punishment.class);

    @Getter @Id private String id;
    @Getter private UUID user;
    @Getter private String reason;
    @Getter private PunishmentType type;
    @Getter private Instant expiresAt;
    @Getter private Map<String, Object> metadata;
    @Getter private String linkedIpBanId;

    @Getter private UUID addedBy;
    @Getter private Instant addedAt;
    @Getter private String actorName;
    @Getter private ActorType actorType;

    @Getter private UUID removedBy;
    @Getter private Instant removedAt;
    @Getter private String removalReason;

    public static List<Punishment> findByTypeSync(Collection<PunishmentType> types) {
        Collection<String> convertedTypes = types.stream().map(PunishmentType::name).collect(Collectors.toList());
        return SyncUtils.blockMulti(punishmentsCollection.find(new Document("type", new Document("$in", convertedTypes))));
    }

    public static Punishment findByIdSync(String id) {
        return SyncUtils.blockOne(punishmentsCollection.find(new Document("_id", id)));
    }

    public static List<Punishment> findByUserSync(User user) {
        return findByUserSync(user.getId());
    }

    public static List<Punishment> findByUserSync(UUID user) {
        return SyncUtils.blockMulti(punishmentsCollection.find(new Document("user", user)));
    }

    public static List<Punishment> findByUserAndTypeSync(User user, Collection<PunishmentType> types) {
        return findByUserAndTypeSync(user.getId(), types);
    }

    public static List<Punishment> findByUserAndTypeSync(UUID user, Collection<PunishmentType> types) {
        Collection<String> convertedTypes = types.stream().map(PunishmentType::name).collect(Collectors.toList());
        return SyncUtils.blockMulti(punishmentsCollection.find(new Document("user", user).append("type", new Document("$in", convertedTypes))));
    }

    public static void findAllPaginated(int skip, int pageSize, SingleResultCallback<List<Punishment>> callback) {
        punishmentsCollection.find().sort(new Document("addedAt", -1)).skip(skip).limit(pageSize).into(new ArrayList<>(), callback);
    }

    public static void findById(String id, SingleResultCallback<Punishment> callback) {
        punishmentsCollection.find(new Document("_id", id)).first(callback);
    }

    public static void findByLinkedIpBanId(String id, SingleResultCallback<Punishment> callback) {
        punishmentsCollection.find(new Document("linkedIpBanId", id)).first(callback);
    }

    public static void findByUser(User user, SingleResultCallback<List<Punishment>> callback) {
        findByUser(user.getId(), callback);
    }

    public static void findByUser(UUID user, SingleResultCallback<List<Punishment>> callback) {
        punishmentsCollection.find(new Document("user", user)).into(new ArrayList<>(), callback);
    }

    public static void findByUserGrouped(Iterable<UUID> users, SingleResultCallback<Map<UUID, List<Punishment>>> callback) {
        punishmentsCollection.find(new Document("user", new Document("$in", users))).into(new ArrayList<>(), (punishments, error) -> {
            if (error != null) {
                callback.onResult(null, error);
            } else {
                Map<UUID, List<Punishment>> result = new HashMap<>();

                for (UUID user : users) {
                    result.put(user, new ArrayList<>());
                }

                for (Punishment punishment : punishments) {
                    result.get(punishment.getUser()).add(punishment);
                }

                callback.onResult(result, null);
            }
        });
    }

    public static void findByUserAndType(User user, Collection<PunishmentType> types, SingleResultCallback<List<Punishment>> callback) {
        findByUserAndType(user.getId(), types, callback);
    }

    public static void findByUserAndType(UUID user, Collection<PunishmentType> types, SingleResultCallback<List<Punishment>> callback) {
        Collection<String> convertedTypes = types.stream().map(PunishmentType::name).collect(Collectors.toList());
        punishmentsCollection.find(new Document("user", user).append("type", new Document("$in", convertedTypes))).into(new ArrayList<>(), callback);
    }

    public Punishment() {} // For Jackson

    public Punishment(User user, String reason, PunishmentType type, Instant expiresAt, User addedBy, Actor actor, Map<String, Object> metadata) {
        this.id = new ObjectId().toString();
        this.user = user.getId();
        this.reason = reason;
        this.type = type;
        this.expiresAt = expiresAt;
        this.addedBy = addedBy == null ? null : addedBy.getId();
        this.addedAt = Instant.now();
        this.actorName = actor.getName();
        this.actorType = actor.getType();
        this.metadata = metadata;
    }

    public boolean isActive() {
        return !(isExpired() || isRemoved());
    }

    public boolean isExpired() {
        return expiresAt != null && expiresAt.isBefore(Instant.now());
    }

    public boolean isRemoved() {
        return removedBy != null;
    }

    public String getAccessDenialReason() {
        switch (type) {
            case BLACKLIST:
                return "Your account has been blacklisted from the MineHQ Network. \n\nThis type of punishment cannot be appealed.";
            case BAN:
                String accessDenialReason = "Your account has been suspended from the MineHQ Network. \n\n";

                if (getExpiresAt() != null) {
                    accessDenialReason += "Expires in " + TimeUtils.formatIntoDetailedString(TimeUtils.getSecondsBetween(getExpiresAt(), Instant.now()));
                } else {
                    accessDenialReason += "Appeal at MineHQ.com/appeal";
                }

                return accessDenialReason;
            default:
                return null;
        }
    }

    public void linkIpBan(IpBan ipBan) {
        this.linkedIpBanId = ipBan.getId();
    }

    public void insert() {
        BlockingCallback<Void> callback = new BlockingCallback<>();
        punishmentsCollection.insertOne(this, callback);
        callback.get();
    }

    public void delete(User removedBy, String reason) {
        this.removedBy = removedBy.getId();
        this.removedAt = Instant.now();
        this.removalReason = reason;

        if (linkedIpBanId != null) {
            IpBan ipBan = IpBan.findByIdSync(linkedIpBanId);

            if (ipBan != null && ipBan.isActive()) {
                ipBan.delete(removedBy, "Linked punishment removed: " + reason);
            }
        }

        BlockingCallback<UpdateResult> callback = new BlockingCallback<>();
        punishmentsCollection.replaceOne(new Document("_id", id), this, callback);
        callback.get();
    }

    public enum PunishmentType {

        BLACKLIST, BAN, MUTE, WARN

    }

}