from sqlalchemy import create_engine, Column, Integer, String, Float, Boolean, DateTime, ForeignKey, JSON, Text, text
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker, relationship
from datetime import datetime
import json
from pathlib import Path

DATABASE_URL = "sqlite:///./cs2_simulator.db"
engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()

# Включаем WAL mode для параллельных чтений и уменьшения SQLITE_BUSY
with engine.connect() as conn:
    conn.execute(text("PRAGMA journal_mode=WAL"))
    conn.execute(text("PRAGMA synchronous=NORMAL"))
    conn.execute(text("PRAGMA cache_size=-64000"))
    conn.execute(text("PRAGMA busy_timeout=5000"))
    conn.commit()

class User(Base):
    __tablename__ = "users"
    
    id = Column(Integer, primary_key=True, index=True)
    username = Column(String(50), unique=True, nullable=False)
    hashed_password = Column(String(200), nullable=False)
    balance = Column(Float, default=0.0)
    is_admin = Column(Boolean, default=False)
    is_banned = Column(Boolean, default=False)
    created_at = Column(DateTime, default=datetime.utcnow)
    last_login = Column(DateTime, nullable=True)
    
    # Карта (кэш, источник правды — Bank API)
    card_balance_cached = Column(Float, default=1000.0)
    total_deposited = Column(Float, default=0.0)   # всего закинуто card→site
    total_withdrawn = Column(Float, default=0.0)   # всего выведено site→card
    last_deposit_date = Column(DateTime, nullable=True)
    
    inventory_items = relationship("InventoryItem", back_populates="user", cascade="all, delete-orphan")
    case_openings = relationship("CaseOpening", back_populates="user", cascade="all, delete-orphan")
    contracts = relationship("Contract", back_populates="user", cascade="all, delete-orphan")
    rpu_settings = relationship("UserRPU", back_populates="user", uselist=False, cascade="all, delete-orphan")
    upgrades = relationship("Upgrade", back_populates="user", cascade="all, delete-orphan")
    upgrade_rpu = relationship("UpgradeRPU", back_populates="user", uselist=False, cascade="all, delete-orphan")
    transactions = relationship("TransactionLog", back_populates="user", cascade="all, delete-orphan")

class UpgradeRPU(Base):
    __tablename__ = "upgrade_rpu"
    
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False, unique=True)
    
    # Множитель шанса апгрейда (1.0 = стандартный)
    upgrade_multiplier = Column(Float, default=1.0)
    
    # Автоматическая подкрутка
    auto_adjust = Column(Boolean, default=False)
    
    # Статистика
    total_attempts = Column(Integer, default=0)
    total_success = Column(Integer, default=0)
    total_spent_value = Column(Float, default=0.0)  # Стоимость потерянных предметов
    
    # Серии
    current_win_streak = Column(Integer, default=0)
    current_lose_streak = Column(Integer, default=0)
    best_win_streak = Column(Integer, default=0)
    worst_lose_streak = Column(Integer, default=0)
    
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    user = relationship("User", back_populates="upgrade_rpu")


class Upgrade(Base):
    __tablename__ = "upgrades"
    
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    input_item_id = Column(Integer, nullable=False)
    input_item_name = Column(String(200))
    input_item_image_url = Column(String(500), default="")
    target_item_id = Column(Integer, nullable=False)
    target_item_name = Column(String(200))
    target_item_image_url = Column(String(500), default="")
    success = Column(Boolean, default=False)
    probability = Column(Float)  # Базовый шанс
    rpu_adjusted_probability = Column(Float)  # Шанс с учетом РПУ
    created_at = Column(DateTime, default=datetime.utcnow)
    
    user = relationship("User", back_populates="upgrades")

class UserRPU(Base):
    __tablename__ = "user_rpu"
    
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False, unique=True)
    
    # Множители шансов для каждой редкости (1.0 = стандартный шанс)
    consumer_multiplier = Column(Float, default=1.0)
    industrial_multiplier = Column(Float, default=1.0)
    mil_spec_multiplier = Column(Float, default=1.0)
    restricted_multiplier = Column(Float, default=1.0)
    classified_multiplier = Column(Float, default=1.0)
    covert_multiplier = Column(Float, default=1.0)
    rare_special_multiplier = Column(Float, default=1.0)
    
    # Общий множитель удачи
    luck_multiplier = Column(Float, default=1.0)
    
    # Автоматическая подкрутка
    auto_adjust = Column(Boolean, default=False)
    
    # Статистика для авто-подкрутки
    total_spent = Column(Float, default=0.0)
    total_opened = Column(Integer, default=0)
    total_value_received = Column(Float, default=0.0)
    last_adjustment = Column(DateTime, nullable=True)
    
    # Серии
    current_streak = Column(Integer, default=0)
    best_streak = Column(Integer, default=0)
    worst_streak = Column(Integer, default=0)
    
    # Последние результаты открытий
    last_results = Column(String(500), default="")
    
    # ── RPU v2: Session (сессии) ──
    luck_budget = Column(Float, default=100.0)         # 0-100, остаток удачи на сессию
    session_spent = Column(Float, default=0.0)         # потрачено в текущей сессии
    session_won = Column(Float, default=0.0)           # выиграно (ценность) в сессии
    session_reset_date = Column(DateTime, nullable=True)  # когда сброшена сессия
    
    # ── RPU v2: Ceiling (потолок) ──
    ceiling_multiplier = Column(Float, default=1.0)    # временный множитель потолка (0.5-3.0)
    ceiling_break_count = Column(Integer, default=0)   # сколько раз пробивал потолок
    ceiling_break_session = Column(Integer, default=0) # пробитий за сессию
    
    # ── RPU v2: Comeback (комбек) ──
    consecutive_loss_value = Column(Float, default=0.0)  # стоимость последовательных проигрышей
    consecutive_loss_count = Column(Integer, default=0)
    comeback_active = Column(Boolean, default=False)
    comeback_openings_left = Column(Integer, default=0)
    comeback_multiplier = Column(Float, default=1.0)     # множитель удачи в режиме комбека
    
    # ── RPU v2: Hot/Cold анализ ──
    hot_score = Column(Float, default=0.0)             # >0 = горячий, <0 = холодный
    last_activity_date = Column(DateTime, nullable=True)
    
    # Мета-данные
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    user = relationship("User", back_populates="rpu_settings")


class PromoCode(Base):
    __tablename__ = "promo_codes"
    
    id = Column(Integer, primary_key=True, index=True)
    code = Column(String(50), unique=True, nullable=False, index=True)
    reward_type = Column(String(30), nullable=False)  # card_to_site, luck_boost, ceiling_boost, free_case, reset_streak
    reward_amount = Column(Float, default=0.0)
    reward_data = Column(String(500), default="")     # доп. параметры (JSON)
    max_uses = Column(Integer, default=1)
    used_count = Column(Integer, default=0)
    start_date = Column(DateTime, default=datetime.utcnow)
    end_date = Column(DateTime, nullable=True)
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    created_by = Column(Integer, nullable=True)


class TransactionLog(Base):
    __tablename__ = "transaction_log"
    
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False, index=True)
    tx_type = Column(String(30), nullable=False)  # card_to_site, site_to_card, promo_bonus, admin
    amount = Column(Float, default=0.0)
    fee = Column(Float, default=0.0)
    promo_code = Column(String(50), nullable=True)
    item_name = Column(String(200), nullable=True)  # при выводе скина
    inventory_item_id = Column(Integer, nullable=True)
    details = Column(String(500), default="")
    created_at = Column(DateTime, default=datetime.utcnow)
    
    user = relationship("User", back_populates="transactions")


class InventoryItem(Base):
    __tablename__ = "inventory_items"
    
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    item_id = Column(Integer, nullable=False)  # ID из ALL_ITEMS
    market_hash_name = Column(String(200), nullable=False)
    rarity = Column(String(50))
    wear = Column(String(50))
    float_value = Column(Float, default=0.0)
    type = Column(String(20), default="Normal")
    obtained_from = Column(String(100))  # "case: название" или "contract"
    obtained_at = Column(DateTime, default=datetime.utcnow)
    is_equipped = Column(Boolean, default=False)
    image_url = Column(String(500), default="")
    price_rub = Column(Float, default=0.0)
    
    user = relationship("User", back_populates="inventory_items")

class CaseOpening(Base):
    __tablename__ = "case_openings"
    
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    case_name = Column(String(100), nullable=False)
    item_id = Column(Integer, nullable=False)
    item_name = Column(String(200), nullable=False)
    rarity = Column(String(50))
    float_value = Column(Float)
    opened_at = Column(DateTime, default=datetime.utcnow)
    
    user = relationship("User", back_populates="case_openings")

class Contract(Base):
    __tablename__ = "contracts"
    
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    input_item_ids = Column(Text, nullable=False)  # JSON список ID из инвентаря
    output_item_id = Column(Integer, nullable=False)
    output_item_name = Column(String(200))
    output_float = Column(Float)
    probability = Column(Float)
    created_at = Column(DateTime, default=datetime.utcnow)
    
    user = relationship("User", back_populates="contracts")


class Achievement(Base):
    __tablename__ = "achievements"
    
    id = Column(Integer, primary_key=True, index=True)
    name = Column(String(100), unique=True, nullable=False)
    title = Column(String(200), nullable=False)
    description = Column(String(500))
    icon = Column(String(50), default="🏆")
    category = Column(String(50), default="general")  # cases, contracts, upgrade, social, general
    requirement_type = Column(String(50), nullable=False)  # open_cases, contracts, upgrade_wins, total_spent, valuable_item, etc.
    requirement_value = Column(Integer, nullable=False)  # how many
    reward_amount = Column(Float, default=0.0)  # bonus rubles
    sort_order = Column(Integer, default=0)
    hidden = Column(Boolean, default=False)  # секретные достижения
    
    user_achievements = relationship("UserAchievement", back_populates="achievement")


class UserAchievement(Base):
    __tablename__ = "user_achievements"
    
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    achievement_id = Column(Integer, ForeignKey("achievements.id"), nullable=False)
    progress = Column(Integer, default=0)  # текущий прогресс
    unlocked_at = Column(DateTime, nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow)
    
    user = relationship("User", backref="user_achievements")
    achievement = relationship("Achievement", back_populates="user_achievements")


class ActivityFeed(Base):
    __tablename__ = "activity_feed"
    
    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    username = Column(String(50), nullable=False)
    activity_type = Column(String(50), nullable=False)  # case_open, contract, upgrade, achievement, trade, crash
    message = Column(String(500), nullable=False)
    data_json = Column(Text, default="{}")  # дополнительные данные (item_name, price, etc.)
    created_at = Column(DateTime, default=datetime.utcnow)
    
    user = relationship("User", backref="activities")

Base.metadata.create_all(bind=engine)

# Миграция: добавляем недостающие индексы для производительности
try:
    from sqlalchemy import inspect
    inspector = inspect(engine)
    indices_to_add = {
        "inventory_items": ["user_id"],
        "case_openings": ["user_id", "opened_at"],
        "upgrades": ["user_id"],
        "contracts": ["user_id"],
        "activity_feed": ["user_id"],
        "user_achievements": ["user_id", "achievement_id"],
    }
    with engine.connect() as conn:
        for tbl, cols in indices_to_add.items():
            existing = [ix["name"] for ix in inspector.get_indexes(tbl)]
            for col in cols:
                ix_name = f"ix_{tbl}_{col}"
                if ix_name not in existing:
                    conn.execute(text(f"CREATE INDEX IF NOT EXISTS {ix_name} ON {tbl} ({col})"))
        conn.commit()
    print("[DB] Индексы: OK")
except Exception as e:
    print(f"[DB] Миграция индексов: {e}")

# Миграция: добавляем колонку hidden если её нет
try:
    from sqlalchemy import inspect
    inspector = inspect(engine)
    cols = [c["name"] for c in inspector.get_columns("achievements")]
    if "hidden" not in cols:
        from sqlalchemy import text
        with engine.connect() as conn:
            conn.execute(text("ALTER TABLE achievements ADD COLUMN hidden BOOLEAN DEFAULT 0"))
            conn.commit()
except Exception as e:
    print(f"[DB] Миграция hidden: {e}")

# Миграция: добавляем image_url и price_rub в inventory_items
try:
    from sqlalchemy import text
    inspector = inspect(engine)
    cols = [c["name"] for c in inspector.get_columns("inventory_items")]
    if "image_url" not in cols:
        with engine.connect() as conn:
            conn.execute(text("ALTER TABLE inventory_items ADD COLUMN image_url VARCHAR(500) DEFAULT ''"))
            conn.execute(text("ALTER TABLE inventory_items ADD COLUMN price_rub FLOAT DEFAULT 0.0"))
            conn.commit()
        # Backfill existing rows from ALL_ITEMS
        try:
            from backend import ALL_ITEMS
            with engine.connect() as conn:
                rows = conn.execute(text("SELECT id, item_id FROM inventory_items WHERE image_url = '' OR price_rub = 0.0")).fetchall()
                for row_id, item_id in rows:
                    if 0 <= item_id < len(ALL_ITEMS):
                        item = ALL_ITEMS[item_id]
                        img = item.get("image_url", "")
                        pr = item.get("price_rub", 0.0)
                        conn.execute(
                            text("UPDATE inventory_items SET image_url = :img, price_rub = :pr WHERE id = :rid"),
                            {"img": img, "pr": pr, "rid": row_id}
                        )
                conn.commit()
            print(f"[DB] Backfilled {len(rows)} inventory_items from ALL_ITEMS")
        except Exception as e2:
            print(f"[DB] Backfill inventory_items: {e2}")
except Exception as e:
    print(f"[DB] Миграция inventory_items: {e}")

# Миграция: новые поля в users (карта)
try:
    inspector = inspect(engine)
    cols = [c["name"] for c in inspector.get_columns("users")]
    if "card_balance_cached" not in cols:
        with engine.connect() as conn:
            conn.execute(text("ALTER TABLE users ADD COLUMN card_balance_cached FLOAT DEFAULT 1000.0"))
            conn.execute(text("ALTER TABLE users ADD COLUMN total_deposited FLOAT DEFAULT 0.0"))
            conn.execute(text("ALTER TABLE users ADD COLUMN total_withdrawn FLOAT DEFAULT 0.0"))
            conn.execute(text("ALTER TABLE users ADD COLUMN last_deposit_date TIMESTAMP"))
            conn.commit()
        print("[DB] Миграция users (card): OK")
except Exception as e:
    print(f"[DB] Миграция users card: {e}")

# Миграция: новые поля в user_rpu (v2)
try:
    inspector = inspect(engine)
    cols = [c["name"] for c in inspector.get_columns("user_rpu")]
    for col, coltype in [
        ("luck_budget", "FLOAT DEFAULT 100.0"),
        ("session_spent", "FLOAT DEFAULT 0.0"),
        ("session_won", "FLOAT DEFAULT 0.0"),
        ("session_reset_date", "TIMESTAMP"),
        ("ceiling_multiplier", "FLOAT DEFAULT 1.0"),
        ("ceiling_break_count", "INTEGER DEFAULT 0"),
        ("ceiling_break_session", "INTEGER DEFAULT 0"),
        ("consecutive_loss_value", "FLOAT DEFAULT 0.0"),
        ("consecutive_loss_count", "INTEGER DEFAULT 0"),
        ("comeback_active", "BOOLEAN DEFAULT 0"),
        ("comeback_openings_left", "INTEGER DEFAULT 0"),
        ("comeback_multiplier", "FLOAT DEFAULT 1.0"),
        ("hot_score", "FLOAT DEFAULT 0.0"),
        ("last_activity_date", "TIMESTAMP"),
    ]:
        if col not in cols:
            with engine.connect() as conn:
                conn.execute(text(f"ALTER TABLE user_rpu ADD COLUMN {col} {coltype}"))
                conn.commit()
            print(f"[DB] Миграция user_rpu: {col}")
except Exception as e:
    print(f"[DB] Миграция user_rpu: {e}")

# Миграция: создаём PromoCode если нет
try:
    Base.metadata.tables["promo_codes"].create(bind=engine, checkfirst=True)
except:
    pass

# Миграция: создаём TransactionLog если нет
try:
    Base.metadata.tables["transaction_log"].create(bind=engine, checkfirst=True)
except:
    pass

def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()