# services/suppliers/app/main.py
"""
Supplier & Procurement Service FastAPI Application
"""

import os
from fastapi import FastAPI
from sqlalchemy import text
from app.core.config import settings
from app.core.database import database_manager
from shared.service_base import StandardFastAPIService

# Import API routers
from app.api import suppliers, supplier_operations, analytics, internal_demo, audit
# REMOVED: purchase_orders, deliveries - PO and delivery management moved to Procurement Service
# from app.api import purchase_orders, deliveries


class SuppliersService(StandardFastAPIService):
    """Suppliers Service with standardized setup"""

    expected_migration_version = "00001"

    async def on_startup(self, app):
        """Custom startup logic including migration verification"""
        await self.verify_migrations()
        await super().on_startup(app)

    async def verify_migrations(self):
        """Verify database schema matches the latest migrations."""
        try:
            async with self.database_manager.get_session() as session:
                result = await session.execute(text("SELECT version_num FROM alembic_version"))
                version = result.scalar()
                if version != self.expected_migration_version:
                    self.logger.error(f"Migration version mismatch: expected {self.expected_migration_version}, got {version}")
                    raise RuntimeError(f"Migration version mismatch: expected {self.expected_migration_version}, got {version}")
                self.logger.info(f"Migration verification successful: {version}")
        except Exception as e:
            self.logger.error(f"Migration verification failed: {e}")
            raise

    def __init__(self):
        # Define expected database tables for health checks
        # NOTE: PO, delivery, and invoice tables moved to Procurement Service
        suppliers_expected_tables = [
            'suppliers', 'supplier_price_lists',
            'supplier_quality_reviews',
            'supplier_performance_metrics', 'supplier_alerts', 'supplier_scorecards',
            'supplier_benchmarks', 'alert_rules'
        ]

        super().__init__(
            service_name="suppliers-service",
            app_name=settings.APP_NAME,
            description=settings.DESCRIPTION,
            version=settings.VERSION,
            cors_origins=settings.CORS_ORIGINS,
            api_prefix="",  # Empty because RouteBuilder already includes /api/v1
            database_manager=database_manager,
            expected_tables=suppliers_expected_tables
        )

    async def on_startup(self, app: FastAPI):
        """Custom startup logic for suppliers service"""
        # Custom startup completed
        pass

    async def on_shutdown(self, app: FastAPI):
        """Custom shutdown logic for suppliers service"""
        # Database cleanup is handled by the base class
        pass

    def get_service_features(self):
        """Return suppliers-specific features"""
        return [
            "supplier_management",
            "vendor_onboarding",
            # REMOVED: "purchase_orders", "delivery_tracking", "invoice_tracking" - moved to Procurement Service
            "quality_reviews",
            "price_list_management",
            "supplier_ratings",
            "performance_tracking",
            "performance_analytics",
            "supplier_scorecards",
            "performance_alerts",
            "business_model_detection",
            "dashboard_analytics",
            "cost_optimization",
            "risk_assessment",
            "benchmarking"
        ]


# Create service instance
service = SuppliersService()

# Create FastAPI app with standardized setup
app = service.create_app()

# Setup standard endpoints
service.setup_standard_endpoints()

# Include API routers
# IMPORTANT: Order matters! More specific routes must come first
# to avoid path parameter matching issues
# REMOVED: purchase_orders.router, deliveries.router - PO and delivery management moved to Procurement Service
service.add_router(audit.router)            # /suppliers/audit-logs - must be FIRST
service.add_router(supplier_operations.router)  # /suppliers/operations/...
service.add_router(analytics.router)        # /suppliers/analytics/...
service.add_router(suppliers.router)        # /suppliers/{supplier_id} - catch-all, must be last
service.add_router(internal_demo.router)


if __name__ == "__main__":
    import uvicorn
    
    uvicorn.run(
        "app.main:app",
        host="0.0.0.0",
        port=8000,
        reload=os.getenv("RELOAD", "false").lower() == "true",
        log_level="info"
    )