# app/modules/registry.py
"""
Module registry defining all available platform modules.

Each module bundles related features and menu items that can be
enabled/disabled per platform. Core modules cannot be disabled.

Module Granularity (Medium - ~12 modules):
Matches menu sections for intuitive mapping between modules and UI.

Module Structure:
- Inline modules: Defined directly in this file (core, platform-admin, etc.)
- Extracted modules: Imported from app/modules/{module}/ (billing, etc.)

As modules are extracted to their own directories, they are imported
here and their inline definitions are replaced.
"""

from app.modules.base import ModuleDefinition
from models.database.admin_menu_config import FrontendType

# Import extracted modules
from app.modules.billing.definition import billing_module
from app.modules.inventory.definition import inventory_module
from app.modules.marketplace.definition import marketplace_module
from app.modules.orders.definition import orders_module
from app.modules.customers.definition import customers_module
from app.modules.cms.definition import cms_module
from app.modules.analytics.definition import analytics_module
from app.modules.messaging.definition import messaging_module
from app.modules.dev_tools.definition import dev_tools_module
from app.modules.monitoring.definition import monitoring_module


# =============================================================================
# Module Definitions
# =============================================================================

MODULES: dict[str, ModuleDefinition] = {
    # =========================================================================
    # Core Modules (Always Enabled)
    # =========================================================================
    "core": ModuleDefinition(
        code="core",
        name="Core Platform",
        description="Dashboard, settings, and profile management. Required for basic operation.",
        is_core=True,
        features=[
            "dashboard",
            "settings",
            "profile",
        ],
        menu_items={
            FrontendType.ADMIN: [
                "dashboard",
                "settings",
                "email-templates",
                "my-menu",
            ],
            FrontendType.VENDOR: [
                "dashboard",
                "profile",
                "settings",
                "email-templates",
            ],
        },
    ),
    "platform-admin": ModuleDefinition(
        code="platform-admin",
        name="Platform Administration",
        description="Company, vendor, and admin user management. Required for multi-tenant operation.",
        is_core=True,
        features=[
            "company_management",
            "vendor_management",
            "admin_user_management",
            "platform_management",
        ],
        menu_items={
            FrontendType.ADMIN: [
                "admin-users",
                "companies",
                "vendors",
                "platforms",
            ],
            FrontendType.VENDOR: [
                "team",
            ],
        },
    ),
    # =========================================================================
    # Optional Modules
    # =========================================================================
    # Billing module - imported from app/modules/billing/
    "billing": billing_module,
    # Inventory module - imported from app/modules/inventory/
    "inventory": inventory_module,
    # Orders module - imported from app/modules/orders/
    "orders": orders_module,
    # Marketplace module - imported from app/modules/marketplace/
    "marketplace": marketplace_module,
    # Customers module - imported from app/modules/customers/
    "customers": customers_module,
    # CMS module - imported from app/modules/cms/
    "cms": cms_module,
    # Analytics module - imported from app/modules/analytics/
    "analytics": analytics_module,
    # Messaging module - imported from app/modules/messaging/
    "messaging": messaging_module,
    # Dev-Tools module - imported from app/modules/dev_tools/
    "dev-tools": dev_tools_module,
    # Monitoring module - imported from app/modules/monitoring/
    "monitoring": monitoring_module,
}


# =============================================================================
# Helper Functions
# =============================================================================


def get_module(code: str) -> ModuleDefinition | None:
    """Get a module definition by code."""
    return MODULES.get(code)


def get_core_modules() -> list[ModuleDefinition]:
    """Get all core modules (cannot be disabled)."""
    return [m for m in MODULES.values() if m.is_core]


def get_core_module_codes() -> set[str]:
    """Get codes of all core modules."""
    return {m.code for m in MODULES.values() if m.is_core}


def get_optional_modules() -> list[ModuleDefinition]:
    """Get all optional modules (can be enabled/disabled)."""
    return [m for m in MODULES.values() if not m.is_core]


def get_all_module_codes() -> set[str]:
    """Get all module codes."""
    return set(MODULES.keys())


def get_menu_item_module(menu_item_id: str, frontend_type: FrontendType) -> str | None:
    """
    Find which module provides a specific menu item.

    Args:
        menu_item_id: The menu item ID to find
        frontend_type: The frontend type to search in

    Returns:
        Module code if found, None otherwise
    """
    for module in MODULES.values():
        if menu_item_id in module.get_menu_items(frontend_type):
            return module.code
    return None


def get_feature_module(feature_code: str) -> str | None:
    """
    Find which module provides a specific feature.

    Args:
        feature_code: The feature code to find

    Returns:
        Module code if found, None otherwise
    """
    for module in MODULES.values():
        if module.has_feature(feature_code):
            return module.code
    return None


def validate_module_dependencies() -> list[str]:
    """
    Validate that all module dependencies are valid.

    Returns:
        List of error messages for invalid dependencies
    """
    errors = []
    all_codes = get_all_module_codes()

    for module in MODULES.values():
        for required in module.requires:
            if required not in all_codes:
                errors.append(
                    f"Module '{module.code}' requires unknown module '{required}'"
                )
            # Core modules should not depend on optional modules
            if module.is_core and required not in get_core_module_codes():
                errors.append(
                    f"Core module '{module.code}' depends on optional module '{required}'"
                )

    return errors


# Validate dependencies on import (development check)
_validation_errors = validate_module_dependencies()
if _validation_errors:
    import warnings

    for error in _validation_errors:
        warnings.warn(f"Module registry validation: {error}", stacklevel=2)


__all__ = [
    "MODULES",
    "get_module",
    "get_core_modules",
    "get_core_module_codes",
    "get_optional_modules",
    "get_all_module_codes",
    "get_menu_item_module",
    "get_feature_module",
    "validate_module_dependencies",
]