# alembic/env.py
"""
Alembic migration environment configuration.

This file is responsible for:
1. Importing ALL database models so Alembic can detect schema changes
2. Configuring the database connection
3. Running migrations in online/offline mode

CRITICAL: Every model in models/database/__init__.py must be imported here!
"""

import os
import sys
from logging.config import fileConfig

from sqlalchemy import engine_from_config, pool

from alembic import context

# Add your project directory to the Python path
sys.path.append(os.path.dirname(os.path.dirname(__file__)))

from app.core.config import settings
from models.database.base import Base

# ============================================================================
# IMPORT ALL DATABASE MODELS
# ============================================================================
# CRITICAL: Every model must be imported here so Alembic can detect tables!
# If a model is not imported, Alembic will not create/update its table.
#
# Models list must match: models/database/__init__.py
# ============================================================================

print("[ALEMBIC] Importing database models...")
print("=" * 70)

# ----------------------------------------------------------------------------
# ADMIN MODELS
# ----------------------------------------------------------------------------
try:
    from app.modules.tenancy.models import (
        AdminAuditLog,
        AdminNotification,
        AdminSession,
        AdminSetting,
        PlatformAlert,
    )

    print("  ✓ Admin models imported (5 models)")
    print("    - AdminAuditLog")
    print("    - AdminNotification")
    print("    - AdminSetting")
    print("    - PlatformAlert")
    print("    - AdminSession")
except ImportError as e:
    print(f"  ✗ Admin models failed: {e}")

# ----------------------------------------------------------------------------
# USER MODEL
# ----------------------------------------------------------------------------
try:
    from app.modules.tenancy.models import User

    print("  ✓ User model imported")
except ImportError as e:
    print(f"  ✗ User model failed: {e}")

# ----------------------------------------------------------------------------
# VENDOR MODELS
# ----------------------------------------------------------------------------
try:
    from app.modules.tenancy.models import Role, Vendor, VendorUser

    print("  ✓ Vendor models imported (3 models)")
    print("    - Vendor")
    print("    - VendorUser")
    print("    - Role")
except ImportError as e:
    print(f"  ✗ Vendor models failed: {e}")

try:
    from app.modules.tenancy.models import VendorDomain

    print("  ✓ VendorDomain model imported")
except ImportError as e:
    print(f"  ✗ VendorDomain model failed: {e}")

try:
    from app.modules.cms.models import VendorTheme

    print("  ✓ VendorTheme model imported")
except ImportError as e:
    print(f"  ✗ VendorTheme model failed: {e}")

# ----------------------------------------------------------------------------
# CONTENT PAGE MODEL (CMS Module)
# ----------------------------------------------------------------------------
try:
    from app.modules.cms.models import ContentPage

    print("  ✓ ContentPage model imported (from CMS module)")
except ImportError as e:
    print(f"  ✗ ContentPage model failed: {e}")

# ----------------------------------------------------------------------------
# PRODUCT MODELS
# ----------------------------------------------------------------------------
try:
    from app.modules.catalog.models import Product

    print("  ✓ Product model imported")
except ImportError as e:
    print(f"  ✗ Product model failed: {e}")

try:
    from app.modules.marketplace.models import MarketplaceProduct

    print("  ✓ MarketplaceProduct model imported")
except ImportError as e:
    print(f"  ✗ MarketplaceProduct model failed: {e}")

# ----------------------------------------------------------------------------
# INVENTORY MODEL
# ----------------------------------------------------------------------------
try:
    from app.modules.inventory.models import Inventory

    print("  ✓ Inventory model imported")
except ImportError as e:
    print(f"  ✗ Inventory model failed: {e}")

# ----------------------------------------------------------------------------
# MARKETPLACE IMPORT
# ----------------------------------------------------------------------------
try:
    from app.modules.marketplace.models import MarketplaceImportJob

    print("  ✓ MarketplaceImportJob model imported")
except ImportError as e:
    print(f"  ✗ MarketplaceImportJob model failed: {e}")

# ----------------------------------------------------------------------------
# CUSTOMER MODELS
# ----------------------------------------------------------------------------
try:
    from app.modules.customers.models.customer import Customer, CustomerAddress

    print("  ✓ Customer models imported (2 models)")
    print("    - Customer")
    print("    - CustomerAddress")
except ImportError as e:
    print(f"  ✗ Customer models failed: {e}")

# ----------------------------------------------------------------------------
# CART MODELS
# ----------------------------------------------------------------------------
try:
    from app.modules.cart.models import CartItem

    print("  ✓ Cart models imported (1 model)")
    print("    - CartItem")
except ImportError as e:
    print(f"  ✗ Cart models failed: {e}")

# ----------------------------------------------------------------------------
# ORDER MODELS
# ----------------------------------------------------------------------------
try:
    from app.modules.orders.models import Order, OrderItem

    print("  ✓ Order models imported (2 models)")
    print("    - Order")
    print("    - OrderItem")
except ImportError as e:
    print(f"  ✗ Order models failed: {e}")

# ============================================================================
# SUMMARY
# ============================================================================
print("=" * 70)
print("[ALEMBIC] Model import completed")
print("[ALEMBIC] Tables detected in metadata:")
print("=" * 70)

if Base.metadata.tables:
    for i, table_name in enumerate(sorted(Base.metadata.tables.keys()), 1):
        print(f"  {i:2d}. {table_name}")
    print("=" * 70)
    print(f"[ALEMBIC] Total tables: {len(Base.metadata.tables)}")
else:
    print("  ⚠️  WARNING: No tables found in metadata!")
    print("  This usually means models are not being imported correctly.")

print("=" * 70)
print()

# ============================================================================
# ALEMBIC CONFIGURATION
# ============================================================================

# Alembic Config object
config = context.config

# Override sqlalchemy.url with our settings
config.set_main_option("sqlalchemy.url", settings.database_url)

if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# Set target metadata from Base
target_metadata = Base.metadata


# ============================================================================
# MODULE MIGRATIONS DISCOVERY
# ============================================================================
# Discover migration paths from self-contained modules.
# Each module can have its own migrations/ directory.
# ============================================================================

def get_version_locations() -> list[str]:
    """
    Get all version locations including module migrations.

    Returns:
        List of paths to migration version directories
    """
    try:
        from app.modules.migrations import get_all_migration_paths

        paths = get_all_migration_paths()
        locations = [str(p) for p in paths if p.exists()]

        if len(locations) > 1:
            print(f"[ALEMBIC] Found {len(locations)} migration locations:")
            for loc in locations:
                print(f"  - {loc}")

        return locations
    except ImportError:
        # Fallback if module migrations not available
        return ["alembic/versions"]


# Get version locations for multi-directory support
version_locations = get_version_locations()


def run_migrations_offline() -> None:
    """
    Run migrations in 'offline' mode.

    This configures the context with just a URL and not an Engine,
    though an Engine is acceptable here as well. By skipping the Engine
    creation we don't even need a DBAPI to be available.

    Calls to context.execute() here emit the given string to the script output.
    """
    url = config.get_main_option("sqlalchemy.url")
    context.configure(
        url=url,
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
        version_locations=version_locations,
    )

    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online() -> None:
    """
    Run migrations in 'online' mode.

    In this scenario we need to create an Engine and associate a connection
    with the context.
    """
    connectable = engine_from_config(
        config.get_section(config.config_ini_section, {}),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )

    with connectable.connect() as connection:
        context.configure(
            connection=connection,
            target_metadata=target_metadata,
            version_locations=version_locations,
        )

        with context.begin_transaction():
            context.run_migrations()


# ============================================================================
# MAIN EXECUTION
# ============================================================================

if context.is_offline_mode():
    run_migrations_offline()
else:
    run_migrations_online()
