import logging
from flask import request
from app.service import service
from app import db
from app.common.responses import error_response, success_response
from datetime import datetime, date, timedelta
from app.classes.customer import (Customer_Customer)
from app.classes.service import (Service_Service,
                                  Service_Service_schema, Service_Parts, Service_Parts_schema,
                                  Service_Plans, Service_Plans_schema
                                  )
from app.classes.auto import Auto_Delivery
from flask_login import login_required
from app.constants import DEFAULT_PAGE_SIZE

logger = logging.getLogger(__name__)

@service.route("/all", methods=["GET"])
@login_required
def get_all_service_calls():
    logger.info("GET /service/all - Fetching all service calls for calendar")
    try:
        all_services = Service_Service.query.all()
        color_map = {
            0: {"backgroundColor": "blue", "textColor": "white"}, 1: {"backgroundColor": "red", "textColor": "white"},
            2: {"backgroundColor": "green", "textColor": "white"}, 3: {"backgroundColor": "yellow", "textColor": "black"},
            4: {"backgroundColor": "black", "textColor": "white"}
        }
        service_type_map = {0: 'Tune-up', 1: 'No Heat', 2: 'Fix', 3: 'Tank Install', 4: 'Other'}
        
        calendar_events = []
        for service_record in all_services:
            service_type_text = service_type_map.get(service_record.type_service_call, 'Service')
            event_title = f"{service_type_text}: {service_record.customer_name}"
            event_colors = color_map.get(service_record.type_service_call, {"backgroundColor": "gray", "textColor": "white"})
            
            # Use the schema to safely get the date string
            serialized_record = Service_Service_schema().dump(service_record)
            start_date = serialized_record.get('scheduled_date')

            event_data = {
                "id": service_record.id, 
                "title": event_title, 
                "start": start_date,
                "end": None,
                "extendedProps": {
                    "customer_id": service_record.customer_id,
                    "description": service_record.description,
                    "type_service_call": service_record.type_service_call,
                    "service_cost": str(service_record.service_cost) if service_record.service_cost is not None else None
                },
                "backgroundColor": event_colors.get("backgroundColor"), 
                "textColor": event_colors.get("textColor"),
                "borderColor": event_colors.get("backgroundColor")
            }
            calendar_events.append(event_data)

        return success_response({"events": calendar_events})
    except Exception as e:
        logger.error(f"Error in /service/all: {e}")
        return error_response(str(e), 500)


# --- THIS IS THE FIX ---
# The logic from /all has been copied here to ensure a consistent data structure.
@service.route("/upcoming", methods=["GET"])
@login_required
def get_upcoming_service_calls():
    """
    Fetches a list of all future service calls from today onwards.
    """
    logger.info("GET /service/upcoming - Fetching upcoming service calls")
    now = datetime.now()
    upcoming_services = (
        Service_Service.query
        .filter(Service_Service.scheduled_date >= now)
        .order_by(Service_Service.scheduled_date.asc())
        .limit(DEFAULT_PAGE_SIZE)
        .all()
    )
    
    service_schema = Service_Service_schema(many=True)
    result = service_schema.dump(upcoming_services)

    return success_response({"services": result})


@service.route("/past", methods=["GET"])
@login_required
def get_past_service_calls():
    """
    Fetches a list of all past service calls before today.
    """
    past_services = (
        Service_Service.query
        .filter(Service_Service.scheduled_date < datetime.combine(date.today(), datetime.min.time()))
        .order_by(Service_Service.scheduled_date.asc())
        .limit(DEFAULT_PAGE_SIZE)
        .all()
    )

    service_schema = Service_Service_schema(many=True)
    result = service_schema.dump(past_services)

    return success_response({"services": result})


@service.route("/today", methods=["GET"])
@login_required
def get_today_service_calls():
    """
    Fetches a list of all service calls for today.
    """
    start_of_today = datetime.combine(date.today(), datetime.min.time())
    start_of_tomorrow = datetime.combine(date.today() + timedelta(days=1), datetime.min.time())
    today_services = (
        Service_Service.query
        .filter(Service_Service.scheduled_date >= start_of_today)
        .filter(Service_Service.scheduled_date < start_of_tomorrow)
        .order_by(Service_Service.scheduled_date.asc())
        .limit(DEFAULT_PAGE_SIZE)
        .all()
    )

    service_schema = Service_Service_schema(many=True)
    result = service_schema.dump(today_services)

    return success_response({"services": result})


@service.route("/upcoming/count", methods=["GET"])
@login_required
def get_upcoming_service_calls_count():
    now = datetime.now()
    try:
        count = (db.session.query(Service_Service).filter(Service_Service.scheduled_date >= now).count())
        return success_response({"count": count})
    except Exception as e:
        return error_response(str(e), 500)

@service.route("/for-customer/<int:customer_id>", methods=["GET"])
@login_required
def get_service_calls_for_customer(customer_id):
    service_records = (Service_Service.query.filter_by(customer_id=customer_id).order_by(Service_Service.scheduled_date.desc()).all())
    service_schema = Service_Service_schema(many=True)
    result = service_schema.dump(service_records)
    return success_response({"services": result})

@service.route("/create", methods=["POST"])
@login_required
def create_service_call():
    data = request.get_json()
    if not data: return error_response("No data provided", 400)
    cus_id=data.get('customer_id')
    get_customer = (db.session.query(Customer_Customer).filter(Customer_Customer.id == cus_id).first())
    if not get_customer: return error_response(f"Customer with id {cus_id} not found.", 404)
    scheduled_datetime_str = data.get('expected_delivery_date')
    scheduled_datetime_obj = datetime.fromisoformat(scheduled_datetime_str)
    new_service_call = Service_Service(
        customer_id=get_customer.id, customer_name=get_customer.customer_first_name + ' ' + get_customer.customer_last_name,
        customer_address=get_customer.customer_address, customer_town=get_customer.customer_town,
        customer_state=get_customer.customer_state, customer_zip=get_customer.customer_zip,
        type_service_call=data.get('type_service_call'), when_ordered=datetime.utcnow(),
        scheduled_date=scheduled_datetime_obj, description=data.get('description'),  service_cost=None,
    )
    db.session.add(new_service_call)
    db.session.commit()
    return success_response({"id": new_service_call.id}, 201)

@service.route("/update-cost/<int:id>", methods=["PUT"])
@login_required
def update_service_cost(id):
    """
    Dedicated endpoint to update only the service cost for a service call.
    This is used after payment capture/charge to update the actual amount.
    """
    try:
        # Find the service
        service_record = Service_Service.query.get_or_404(id)

        # Get request data - only service_cost
        data = request.get_json()
        if not data:
            return error_response("No data provided", 400)

        # Extract and validate the service_cost
        new_cost = data.get('service_cost')
        if new_cost is None:
            return error_response("service_cost is required", 400)

        # Convert to float for validation
        try:
            new_cost_float = float(new_cost)
        except (ValueError, TypeError):
            return error_response("service_cost must be a valid number", 400)

        # Update the service_cost
        service_record.service_cost = new_cost_float

        # Commit the transaction
        db.session.commit()

        # Return success response
        return success_response({
            "service_id": id,
            "service_cost_updated": new_cost_float,
            "message": f"Service {id} cost updated to ${new_cost_float}"
        })

    except Exception as e:
        db.session.rollback()
        logger.error(f"Error updating service cost for service {id}: {e}")
        return error_response(str(e), 500)

@service.route("/update/<int:id>", methods=["PUT"])
@login_required
def update_service_call(id):
    service_record = Service_Service.query.get_or_404(id)
    data = request.get_json()
    if not data: return error_response("No data provided", 400)
    scheduled_datetime_str = data.get('scheduled_date')
    if scheduled_datetime_str:
        service_record.scheduled_date = datetime.fromisoformat(scheduled_datetime_str)
    service_record.type_service_call = data.get('type_service_call', service_record.type_service_call)
    service_record.description = data.get('description', service_record.description)
    service_record.service_cost = data.get('service_cost', service_record.service_cost)

    try:
        db.session.commit()
        service_schema = Service_Service_schema(many=False)
        return success_response({"service": service_schema.dump(service_record)})
    except Exception as e:
        db.session.rollback()
        return error_response(str(e), 500)


# Service Plans CRUD endpoints
@service.route("/plans/active", methods=["GET"])
@login_required
def get_active_service_plans():
    """
    Get all active service plans (contract_plan > 0)
    """
    try:
        plans = Service_Plans.query.filter(Service_Plans.contract_plan > 0).all()
        plans_schema = Service_Plans_schema(many=True)
        result = plans_schema.dump(plans)

        # Add customer info to each plan
        for plan in result:
            customer = Customer_Customer.query.get(plan['customer_id'])
            if customer:
                plan['customer_name'] = f"{customer.customer_first_name} {customer.customer_last_name}"
                plan['customer_address'] = customer.customer_address
                plan['customer_town'] = customer.customer_town

        return success_response({"plans": result})
    except Exception as e:
        return error_response(str(e), 500)


@service.route("/plans/customer/<int:customer_id>", methods=["GET"])
@login_required
def get_customer_service_plan(customer_id):
    """
    Get service plan for a specific customer
    """
    try:
        plan = Service_Plans.query.filter_by(customer_id=customer_id).first()
        if plan:
            plan_schema = Service_Plans_schema()
            return success_response({"plan": plan_schema.dump(plan)})
        else:
            return success_response({"plan": None})
    except Exception as e:
        return error_response(str(e), 500)


@service.route("/plans/create", methods=["POST"])
@login_required
def create_service_plan():
    """
    Create a new service plan for a customer
    """
    data = request.get_json()
    if not data:
        return error_response("No data provided", 400)

    try:
        new_plan = Service_Plans(
            customer_id=data['customer_id'],
            contract_plan=data['contract_plan'],
            contract_years=data['contract_years'],
            contract_start_date=datetime.fromisoformat(data['contract_start_date'])
        )
        db.session.add(new_plan)
        db.session.commit()

        plan_schema = Service_Plans_schema()
        return success_response({"plan": plan_schema.dump(new_plan)}, 201)
    except Exception as e:
        db.session.rollback()
        return error_response(str(e), 500)


@service.route("/plans/update/<int:customer_id>", methods=["PUT"])
@login_required
def update_service_plan(customer_id):
    """
    Update existing service plan for a customer
    """
    data = request.get_json()
    if not data:
        return error_response("No data provided", 400)

    try:
        plan = Service_Plans.query.filter_by(customer_id=customer_id).first()
        if not plan:
            # Create new plan if it doesn't exist
            plan = Service_Plans(customer_id=customer_id)
            db.session.add(plan)

        plan.contract_plan = data.get('contract_plan', plan.contract_plan)
        plan.contract_years = data.get('contract_years', plan.contract_years)
        if data.get('contract_start_date'):
            plan.contract_start_date = datetime.fromisoformat(data['contract_start_date'])

        db.session.commit()

        plan_schema = Service_Plans_schema()
        return success_response({"plan": plan_schema.dump(plan)})
    except Exception as e:
        db.session.rollback()
        return error_response(str(e), 500)


@service.route("/plans/delete/<int:customer_id>", methods=["DELETE"])
@login_required
def delete_service_plan(customer_id):
    """
    Delete service plan for a customer
    """
    try:
        plan = Service_Plans.query.filter_by(customer_id=customer_id).first()
        if not plan:
            return error_response("Service plan not found", 404)

        db.session.delete(plan)
        db.session.commit()
        return success_response({"message": "Service plan deleted successfully"})
    except Exception as e:
        db.session.rollback()
        return error_response(str(e), 500)

@service.route("/<int:id>", methods=["GET"])
@login_required
def get_service_by_id(id):
    service_record = Service_Service.query.get_or_404(id)
    service_schema = Service_Service_schema()
    return success_response({"service": service_schema.dump(service_record)})

@service.route("/delete/<int:id>", methods=["DELETE"])
@login_required
def delete_service_call(id):
    service_record = Service_Service.query.get_or_404(id)
    try:
        db.session.delete(service_record)
        db.session.commit()
        return success_response({"message": "Service deleted successfully"})
    except Exception as e:
        db.session.rollback()
        return error_response(str(e), 500)

@service.route("/parts/customer/<int:customer_id>", methods=["GET"])
@login_required
def get_service_parts(customer_id):
    parts = Service_Parts.query.filter_by(customer_id=customer_id).first()
    if parts:
        parts_schema = Service_Parts_schema()
        return success_response({"parts": parts_schema.dump(parts)})
    else:
        return success_response({"parts": {
            "customer_id": customer_id, "oil_filter": "", "oil_filter_2": "",
            "oil_nozzle": "", "oil_nozzle_2": "", "hot_water_tank": 0
        }})

@service.route("/parts/update/<int:customer_id>", methods=["POST"])
@login_required
def update_service_parts(customer_id):
    try:
        data = request.get_json()

        if not data:
            return error_response("No data provided", 400)

        get_customer = db.session.query(Customer_Customer).filter(Customer_Customer.id == customer_id).first()
        parts = Service_Parts.query.filter_by(customer_id=customer_id).first()
        if not parts:
            parts = Service_Parts(customer_id=customer_id)
            db.session.add(parts)
        parts.oil_filter = data.get('oil_filter', parts.oil_filter)
        parts.oil_filter_2 = data.get('oil_filter_2', parts.oil_filter_2)
        parts.oil_nozzle = data.get('oil_nozzle', parts.oil_nozzle)
        parts.oil_nozzle_2 = data.get('oil_nozzle_2', parts.oil_nozzle_2)
        parts.hot_water_tank = data.get('hot_water_tank', parts.hot_water_tank if parts.hot_water_tank is not None else 0)

        # Sync to Auto_Delivery if customer is automatic
        if get_customer and get_customer.customer_automatic == 1:
            get_auto = db.session.query(Auto_Delivery).filter(Auto_Delivery.customer_id == customer_id).first()
            if get_auto:
                get_auto.hot_water_summer = parts.hot_water_tank
                db.session.add(get_auto)

        db.session.commit()
        return success_response({"message": "Service parts updated successfully"})
    except Exception as e:
        db.session.rollback()
        return error_response(str(e), 500)


@service.route("/payment/<int:service_id>/<int:payment_type>", methods=["PUT"])
@login_required
def process_service_payment(service_id, payment_type):
    service = db.session.query(Service_Service).filter(Service_Service.id == service_id).first()
    if not service:
        return error_response("Service not found", 404)

    # Set payment columns as specified
    service.payment_type = payment_type  # e.g., 1 for Tiger
    service.payment_status = 2  # As specified
    # payment_card_id retains the selected card's ID if set in the service record

    try:
        db.session.commit()
        return success_response()
    except Exception as e:
        db.session.rollback()
        return error_response(str(e), 500)