"""API routes for Amar (MOCK) vein - Mock Amar API for testing."""

import asyncio
import random
from fastapi import APIRouter, HTTPException, Query
from fastapi.responses import JSONResponse
from typing import Optional, List, Dict, Any
from pydantic import BaseModel

# Import datagen from ward/tools
import sys
from pathlib import Path
ward_tools_path = Path(__file__).parent.parent.parent.parent.parent / "ward" / "tools"
sys.path.insert(0, str(ward_tools_path))

from datagen.amar import AmarDataGenerator

from ..core.config import settings

router = APIRouter()

# In-memory storage for mock data (reset on restart)
MOCK_DB = {
    "petowners": {},
    "pets": {},
    "carts": {},
    "service_requests": {},
}


# Request/Response Models
class CreatePetOwnerRequest(BaseModel):
    address: str
    email: Optional[str] = None
    phone: Optional[str] = None


class CreatePetRequest(BaseModel):
    owner_id: int
    name: str
    species: str  # DOG, CAT
    age: Optional[int] = None
    age_unit: str = "years"  # years, months


class CreateCartRequest(BaseModel):
    owner_id: int


class AddCartItemRequest(BaseModel):
    service_id: int
    pet_id: int
    quantity: int = 1


async def _mock_delay():
    """Add realistic delay if enabled."""
    if settings.enable_random_delays:
        delay_ms = random.randint(settings.min_delay_ms, settings.max_delay_ms)
        await asyncio.sleep(delay_ms / 1000)


def _maybe_error():
    """Randomly raise an error based on error_rate."""
    if random.random() < settings.error_rate:
        raise HTTPException(500, "Mock error: Simulated failure")


@router.get("/health")
async def health():
    """Health check endpoint."""
    return {
        "status": "ok",
        "vein": "Amar\n(MOCK)",
        "message": "Mock Amar API for testing",
        "_mock": True,
    }


@router.post("/api/v1/pet-owners/")
async def create_petowner(request: CreatePetOwnerRequest):
    """Create a guest petowner (VET-536)."""
    await _mock_delay()
    _maybe_error()

    owner = AmarDataGenerator.petowner(
        address=request.address,
        is_guest=True,
        email=request.email,
        phone=request.phone,
    )

    # Store in mock DB
    MOCK_DB["petowners"][owner["id"]] = owner

    owner["_mock"] = True
    return owner


@router.get("/api/v1/pet-owners/{owner_id}")
async def get_petowner(owner_id: int):
    """Get petowner by ID."""
    await _mock_delay()
    _maybe_error()

    owner = MOCK_DB["petowners"].get(owner_id)
    if not owner:
        raise HTTPException(404, f"PetOwner {owner_id} not found")

    return owner


@router.post("/api/v1/pets/")
async def create_pet(request: CreatePetRequest):
    """Create a pet (VET-537)."""
    await _mock_delay()
    _maybe_error()

    # Verify owner exists
    if request.owner_id not in MOCK_DB["petowners"]:
        raise HTTPException(404, f"Owner {request.owner_id} not found")

    pet = AmarDataGenerator.pet(
        owner_id=request.owner_id,
        name=request.name,
        species=request.species,
        age_value=request.age,
        age_unit=request.age_unit,
    )

    # Store in mock DB
    MOCK_DB["pets"][pet["id"]] = pet

    pet["_mock"] = True
    return pet


@router.get("/api/v1/pets/{pet_id}")
async def get_pet(pet_id: int):
    """Get pet by ID."""
    await _mock_delay()
    _maybe_error()

    pet = MOCK_DB["pets"].get(pet_id)
    if not pet:
        raise HTTPException(404, f"Pet {pet_id} not found")

    return pet


@router.post("/api/v1/cart/")
async def create_cart(request: CreateCartRequest):
    """Create a cart (VET-538)."""
    await _mock_delay()
    _maybe_error()

    # Verify owner exists
    if request.owner_id not in MOCK_DB["petowners"]:
        raise HTTPException(404, f"Owner {request.owner_id} not found")

    cart = AmarDataGenerator.cart(owner_id=request.owner_id)

    # Store in mock DB
    MOCK_DB["carts"][cart["id"]] = cart

    cart["_mock"] = True
    return cart


@router.post("/api/v1/cart/{cart_id}/items/")
async def add_cart_item(cart_id: int, request: AddCartItemRequest):
    """Add item to cart and recalculate summary."""
    await _mock_delay()
    _maybe_error()

    cart = MOCK_DB["carts"].get(cart_id)
    if not cart:
        raise HTTPException(404, f"Cart {cart_id} not found")

    # Get service price
    services = AmarDataGenerator.SERVICES
    service = next((s for s in services if s["id"] == request.service_id), None)
    if not service:
        raise HTTPException(404, f"Service {request.service_id} not found")

    # Add item
    item = {
        "service_id": request.service_id,
        "service_name": service["name"],
        "pet_id": request.pet_id,
        "quantity": request.quantity,
        "price": service["price"],
    }

    cart["items"].append(item)

    # Recalculate summary
    cart = AmarDataGenerator.calculate_cart_summary(cart, cart["items"])
    MOCK_DB["carts"][cart_id] = cart

    cart["_mock"] = True
    return cart


@router.get("/api/v1/cart/{cart_id}")
async def get_cart(cart_id: int):
    """Get cart by ID."""
    await _mock_delay()
    _maybe_error()

    cart = MOCK_DB["carts"].get(cart_id)
    if not cart:
        raise HTTPException(404, f"Cart {cart_id} not found")

    return cart


@router.get("/api/v1/services/")
async def list_services(
    species: Optional[str] = Query(None),
    neighborhood_id: Optional[int] = Query(None),
):
    """List available services filtered by species and neighborhood (VET-540)."""
    await _mock_delay()
    _maybe_error()

    services = AmarDataGenerator.filter_services(
        species=species,
        neighborhood_id=neighborhood_id,
    )

    for service in services:
        service["_mock"] = True

    return services


@router.get("/api/v1/categories/")
async def list_categories(
    species: Optional[str] = Query(None),
    neighborhood_id: Optional[int] = Query(None),
):
    """List categories with available services (VET-539)."""
    await _mock_delay()
    _maybe_error()

    categories = AmarDataGenerator.filter_categories(
        species=species,
        neighborhood_id=neighborhood_id,
    )

    for category in categories:
        category["_mock"] = True

    return categories


@router.post("/solicitudes/service-requests/")
async def create_service_request(cart_id: int, requested_date: Optional[str] = None):
    """Create a service request."""
    await _mock_delay()
    _maybe_error()

    cart = MOCK_DB["carts"].get(cart_id)
    if not cart:
        raise HTTPException(404, f"Cart {cart_id} not found")

    request = AmarDataGenerator.service_request(
        cart_id=cart_id,
        requested_date=requested_date,
    )

    MOCK_DB["service_requests"][request["id"]] = request

    request["_mock"] = True
    return request


@router.get("/mock/reset")
async def reset_mock_db():
    """Reset the mock database (useful for testing)."""
    MOCK_DB["petowners"].clear()
    MOCK_DB["pets"].clear()
    MOCK_DB["carts"].clear()
    MOCK_DB["service_requests"].clear()

    return {
        "message": "Mock database reset",
        "_mock": True,
    }


@router.get("/mock/stats")
async def mock_stats():
    """Get mock database statistics."""
    return {
        "petowners": len(MOCK_DB["petowners"]),
        "pets": len(MOCK_DB["pets"]),
        "carts": len(MOCK_DB["carts"]),
        "service_requests": len(MOCK_DB["service_requests"]),
        "_mock": True,
    }