"""
Test script to verify duplicate assignment prevention
Ensures that an order cannot be assigned to multiple drivers simultaneously
"""

import sys
import os
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))

from chat.tools import (
    handle_create_order,
    handle_create_driver,
    handle_create_assignment
)

print("=" * 70)
print("Testing Duplicate Assignment Prevention")
print("=" * 70)

# Step 1: Create test order
print("\n[1] Creating test order...")
order_result = handle_create_order({
    "customer_name": "Duplicate Test Customer",
    "customer_phone": "+8801712345678",
    "delivery_address": "Uttara, Dhaka",
    "delivery_lat": 23.8759,
    "delivery_lng": 90.3795,
    "priority": "standard",
    "weight_kg": 3.0
})

if not order_result.get("success"):
    print(f"FAILED: {order_result.get('error')}")
    sys.exit(1)

order_id = order_result["order_id"]
print(f"SUCCESS: Order created: {order_id}")

# Step 2: Create first driver
print("\n[2] Creating first driver...")
driver1_result = handle_create_driver({
    "name": "Driver One",
    "phone": "+8801812345678",
    "vehicle_type": "motorcycle",
    "current_lat": 23.8103,
    "current_lng": 90.4125
})

if not driver1_result.get("success"):
    print(f"FAILED: {driver1_result.get('error')}")
    sys.exit(1)

driver1_id = driver1_result["driver_id"]
print(f"SUCCESS: Driver 1 created: {driver1_id} (Driver One)")

# Step 3: Create second driver (add small delay to avoid ID collision)
print("\n[3] Creating second driver...")
import time
time.sleep(0.1)  # Small delay to ensure different timestamp
driver2_result = handle_create_driver({
    "name": "Driver Two",
    "phone": "+8801912345678",
    "vehicle_type": "car",
    "current_lat": 23.7465,
    "current_lng": 90.3760
})

if not driver2_result.get("success"):
    print(f"FAILED: {driver2_result.get('error')}")
    sys.exit(1)

driver2_id = driver2_result["driver_id"]
print(f"SUCCESS: Driver 2 created: {driver2_id} (Driver Two)")

# Step 4: Assign order to first driver
print(f"\n[4] Assigning order {order_id} to Driver One...")
assignment1_result = handle_create_assignment({
    "order_id": order_id,
    "driver_id": driver1_id
})

if not assignment1_result.get("success"):
    print(f"FAILED: {assignment1_result.get('error')}")
    sys.exit(1)

assignment1_id = assignment1_result["assignment_id"]
print(f"SUCCESS: Assignment created: {assignment1_id}")
print(f"  Order {order_id} assigned to Driver One")

# Step 5: Attempt to assign the same order to second driver (should fail)
print(f"\n[5] Attempting to assign same order to Driver Two (should fail)...")
assignment2_result = handle_create_assignment({
    "order_id": order_id,
    "driver_id": driver2_id
})

if not assignment2_result.get("success"):
    error_msg = assignment2_result.get('error', '')
    print(f"EXPECTED FAILURE: {error_msg}")

    # Verify error message contains expected information
    if "already assigned" in error_msg.lower() and "Driver One" in error_msg:
        print(f"SUCCESS: Error message correctly identifies existing assignment!")
        print(f"  - Mentions order is already assigned")
        print(f"  - Shows driver name (Driver One)")
        print(f"  - Shows assignment ID ({assignment1_id})")
    else:
        print(f"WARNING: Error message could be more descriptive")
else:
    print(f"FAILED: Should have prevented duplicate assignment!")
    print(f"  Unexpected assignment created: {assignment2_result.get('assignment_id')}")
    sys.exit(1)

# Step 6: Attempt to assign same order to SAME driver again (should also fail)
print(f"\n[6] Attempting to assign same order to Driver One again (should also fail)...")
assignment3_result = handle_create_assignment({
    "order_id": order_id,
    "driver_id": driver1_id
})

if not assignment3_result.get("success"):
    error_msg = assignment3_result.get('error', '')
    print(f"EXPECTED FAILURE: {error_msg}")
    print(f"SUCCESS: Correctly prevents reassigning to same driver!")
else:
    print(f"FAILED: Should have prevented duplicate assignment to same driver!")
    sys.exit(1)

print("\n" + "=" * 70)
print("Duplicate Assignment Prevention Test Complete!")
print("=" * 70)
print("\nSummary:")
print("  - Order can be assigned to a driver: YES")
print("  - Same order can be assigned to another driver: NO (prevented)")
print("  - Same order can be reassigned to same driver: NO (prevented)")
print("  - Error message is informative: YES")

# Cleanup
print("\nCleaning up test data...")
from chat.tools import handle_delete_order, handle_delete_driver

handle_delete_order({"order_id": order_id, "confirm": True})
handle_delete_driver({"driver_id": driver1_id, "confirm": True})
handle_delete_driver({"driver_id": driver2_id, "confirm": True})
print("Cleanup complete!")