from datetime import datetime
from sqlalchemy import (
    Column,
    Integer,
    BigInteger,
    String,
    DateTime,
    ForeignKey,
    Text,
    Boolean,
    UniqueConstraint,
)
from sqlalchemy.orm import relationship

from app.db.base import Base


class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True)
    tg_id = Column(BigInteger, unique=True, nullable=False, index=True)
    name = Column(String(255))
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)


class Chat(Base):
    __tablename__ = "chats"

    id = Column(Integer, primary_key=True)
    chat_id = Column(BigInteger, unique=True, nullable=False, index=True)
    type = Column(String(32))  # group | supergroup | channel
    title = Column(String(255))
    owner_user_id = Column(Integer, ForeignKey("users.id"), nullable=True, index=True)
    can_post = Column(Boolean, default=False, nullable=False)
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)

    owner = relationship("User")


class Draft(Base):
    __tablename__ = "drafts"

    id = Column(Integer, primary_key=True)
    user_id = Column(Integer, ForeignKey("users.id"), index=True)
    text = Column(Text, nullable=True)
    status = Column(String(16), default="editing", index=True)  # editing|ready|sent|cancelled
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
    updated_at = Column(DateTime, default=datetime.utcnow, nullable=False)

    user = relationship("User")
    media = relationship("DraftMedia", cascade="all, delete-orphan", back_populates="draft")


class DraftMedia(Base):
    __tablename__ = "draft_media"

    id = Column(Integer, primary_key=True)
    draft_id = Column(Integer, ForeignKey("drafts.id"), index=True)
    kind = Column(String(16))  # photo | video | animation
    file_id = Column(String(255))
    order = Column(Integer, default=0)

    draft = relationship("Draft", back_populates="media")


class Delivery(Base):
    __tablename__ = "deliveries"

    id = Column(Integer, primary_key=True)
    draft_id = Column(Integer, ForeignKey("drafts.id"), index=True)
    chat_id = Column(BigInteger, index=True)
    status = Column(String(16), default="new", index=True)  # new | sent | failed
    error = Column(Text, nullable=True)
    message_ids = Column(Text, nullable=True)  # csv для альбомов/нескольких сообщений
    content_hash = Column(String(128), index=True, nullable=True)  # анти-дубликаты
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)


# --- учёт участников (для аналитики/модерации) ---
class ChatMember(Base):
    __tablename__ = "chat_members"

    id = Column(Integer, primary_key=True)
    chat_id = Column(BigInteger, index=True, nullable=False)
    user_id = Column(Integer, ForeignKey("users.id"), index=True, nullable=False)
    tg_user_id = Column(BigInteger, index=True, nullable=False)
    username = Column(String(255))
    first_name = Column(String(255))
    last_name = Column(String(255))
    status = Column(String(32), index=True)  # member | administrator | creator | left | kicked ...
    is_admin = Column(Boolean, default=False, nullable=False)
    first_seen_at = Column(DateTime, nullable=False, default=datetime.utcnow)
    last_seen_at = Column(DateTime, nullable=False, default=datetime.utcnow)

    user = relationship("User")

    __table_args__ = (UniqueConstraint("chat_id", "tg_user_id", name="uq_chat_members_chat_user"),)


# --- политики безопасности и словари ---
class SecurityPolicy(Base):
    __tablename__ = "security_policies"

    id = Column(Integer, primary_key=True)
    owner_user_id = Column(Integer, ForeignKey("users.id"), index=True, nullable=True)  # NULL = глобальная
    name = Column(String(100), nullable=False)

    # категории словарей (True = блокировать)
    block_adult = Column(Boolean, default=True, nullable=False)
    block_spam = Column(Boolean, default=True, nullable=False)
    block_scam = Column(Boolean, default=True, nullable=False)
    block_profanity = Column(Boolean, default=False, nullable=False)

    # лимиты и режимы
    cooldown_seconds = Column(Integer, default=30, nullable=False)              # пауза между постами/чат
    duplicate_window_seconds = Column(Integer, default=120, nullable=False)    # окно дублей (сек)
    max_links = Column(Integer, default=3, nullable=False)
    max_mentions = Column(Integer, default=5, nullable=False)
    use_whitelist = Column(Boolean, default=False, nullable=False)

    # наказания/эскалация (для входящих сообщений в группе)
    enforce_action_default = Column(String(16), default="delete", nullable=False)  # delete|warn|timeout|ban|none
    timeout_minutes = Column(Integer, default=10, nullable=False)
    strikes_to_warn = Column(Integer, default=1, nullable=False)
    strikes_to_timeout = Column(Integer, default=2, nullable=False)
    strikes_to_ban = Column(Integer, default=3, nullable=False)
    user_msg_per_minute = Column(Integer, default=0, nullable=False)  # 0 = выключено


class ChatSecurity(Base):
    __tablename__ = "chat_security"

    id = Column(Integer, primary_key=True)
    chat_id = Column(BigInteger, index=True, nullable=False, unique=True)
    policy_id = Column(Integer, ForeignKey("security_policies.id"), index=True, nullable=False)
    enabled = Column(Boolean, default=False, nullable=False)  # включена ли модерация для этого чата


class SpamDictionary(Base):
    __tablename__ = "spam_dictionaries"

    id = Column(Integer, primary_key=True)
    owner_user_id = Column(Integer, ForeignKey("users.id"), index=True, nullable=True)  # NULL = глобальная
    name = Column(String(120), nullable=False)
    category = Column(String(32), nullable=False)  # adult | spam | scam | profanity | custom
    kind = Column(String(16), nullable=False)      # plain | regex
    lang = Column(String(8), nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)


class DictionaryEntry(Base):
    __tablename__ = "dictionary_entries"

    id = Column(Integer, primary_key=True)
    dictionary_id = Column(Integer, ForeignKey("spam_dictionaries.id"), index=True, nullable=False)
    pattern = Column(Text, nullable=False)        # слово/фраза или регулярка
    is_regex = Column(Boolean, default=False, nullable=False)


class PolicyDictionaryLink(Base):
    __tablename__ = "policy_dict_links"

    id = Column(Integer, primary_key=True)
    policy_id = Column(Integer, ForeignKey("security_policies.id"), index=True, nullable=False)
    dictionary_id = Column(Integer, ForeignKey("spam_dictionaries.id"), index=True, nullable=False)

    __table_args__ = (UniqueConstraint("policy_id", "dictionary_id", name="uq_policy_dict"),)


class DomainRule(Base):
    __tablename__ = "domain_rules"

    id = Column(Integer, primary_key=True)
    policy_id = Column(Integer, ForeignKey("security_policies.id"), index=True, nullable=False)
    domain = Column(String(255), nullable=False)
    kind = Column(String(16), nullable=False)  # whitelist | blacklist

    __table_args__ = (UniqueConstraint("policy_id", "domain", "kind", name="uq_domain_rule"),)


# --- журнал модерации/событий ---
class ModerationLog(Base):
    __tablename__ = "moderation_logs"

    id = Column(Integer, primary_key=True)
    chat_id = Column(BigInteger, index=True, nullable=False)
    tg_user_id = Column(BigInteger, index=True, nullable=False)
    message_id = Column(BigInteger, nullable=True)
    reason = Column(Text, nullable=False)   # причины (через '; '), либо текст ошибки
    action = Column(String(16), nullable=False)  # delete|warn|timeout|ban|error|none
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)


class UserStrike(Base):
    __tablename__ = "user_strikes"

    id = Column(Integer, primary_key=True)
    chat_id = Column(BigInteger, index=True, nullable=False)
    tg_user_id = Column(BigInteger, index=True, nullable=False)
    strikes = Column(Integer, default=0, nullable=False)
    updated_at = Column(DateTime, default=datetime.utcnow, nullable=False)

    __table_args__ = (UniqueConstraint("chat_id", "tg_user_id", name="uq_strikes_chat_user"),)


class MessageEvent(Base):
    __tablename__ = "message_events"

    id = Column(Integer, primary_key=True)
    chat_id = Column(BigInteger, index=True, nullable=False)
    tg_user_id = Column(BigInteger, index=True, nullable=False)
    message_id = Column(BigInteger, nullable=True)
    content_hash = Column(String(128), index=True, nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)