eamco_office_api/app/stats/views.py

import logging
from datetime import date
from app.stats import stats
import datetime
from app import db
from app.common.responses import success_response
from app.classes.delivery import Delivery_Delivery
from app.classes.stats_company import Stats_Company, Stats_Company_schema
from sqlalchemy import func, and_, extract
from app.classes.stats_customer import Stats_Customer, Stats_Customer_schema

logger = logging.getLogger(__name__)


def get_monday_date(date_object):
  """Gets the date of the Monday for the given date."""

  # Get the day of the week as an integer (0 = Monday, 6 = Sunday)
  day_of_week = date_object.weekday()

  # Calculate the number of days to subtract to get to Monday
  days_to_monday = day_of_week - 0  # Monday is 0

  # Subtract the days from the given date to get Monday's date
  monday_date = date_object - datetime.timedelta(days=days_to_monday)

  return monday_date




@stats.route("/calls/add", methods=["PUT"])
def total_calls_post():
    logger.info("PUT /stats/calls/add - Incrementing call count")
    total_calls_today = (db.session
                        .query(Stats_Company)
                        .filter(Stats_Company.expected_delivery_date == date.today())
                        .first())
    current_call_count = total_calls_today.total_calls
    new_call = current_call_count + 1
    total_calls_today.total_calls = new_call

    db.session.add(total_calls_today)
    db.session.commit()

    return success_response()


@stats.route("/calls/count/today", methods=["GET"])
def total_calls_today():
    logger.info("GET /stats/calls/count/today - Getting today's call count")
    total_calls_today = (db.session
                        .query(Stats_Company)
                        .filter(Stats_Company.expected_delivery_date == date.today())
                        .count())

    return success_response({'data': total_calls_today})


@stats.route("/gallons/total/<int:driver_id>", methods=["GET"])
def total_gallons_delivered_driver(driver_id):
    logger.info(f"GET /stats/gallons/total/{driver_id} - Calculating total gallons for driver")
    gallons_list = []

    total_gallons = db.session\
                    .query(Delivery_Delivery)\
                    .filter(Delivery_Delivery.driver_employee_id ==  driver_id)\
                    .all()

    for f in total_gallons:
        gallons_list.append(f.gallons_delivered)
    sum_of_gallons = (sum(gallons_list))

    return success_response({'data': sum_of_gallons})


@stats.route("/delivery/total/<int:driver_id>", methods=["GET"])
def total_deliveries_driver(driver_id):
    logger.info(f"GET /stats/delivery/total/{driver_id} - Counting total deliveries for driver")
    total_stops = (db.session
                        .query(Delivery_Delivery)
                        .filter(Delivery_Delivery.driver_employee_id == driver_id)
                        .count())
    return success_response({'data': total_stops})


@stats.route("/primes/total/<int:driver_id>", methods=["GET"])
def total_primes_driver(driver_id):
    logger.info(f"GET /stats/primes/total/{driver_id} - Counting prime deliveries for driver")
    total_stops = (db.session
                        .query(Delivery_Delivery)
                        .filter(Delivery_Delivery.driver_employee_id == driver_id)
                        .filter(Delivery_Delivery.prime == 1)
                        .count())

    return success_response({'data': total_stops})

@stats.route("/delivery/count/today", methods=["GET"])
def total_deliveries_today():
    logger.info("GET /stats/delivery/count/today - Counting today's deliveries")
    total_stops = (db.session
                        .query(Delivery_Delivery)
                        .filter(Delivery_Delivery.expected_delivery_date == date.today())
                        .count())
    return success_response({'data': total_stops})


@stats.route("/delivery/count/delivered/today", methods=["GET"])
def total_deliveries_today_finished():
    logger.info("GET /stats/delivery/count/delivered/today - Counting completed deliveries today")
    total_stops = (db.session
                        .query(Delivery_Delivery)
                        .filter(Delivery_Delivery.expected_delivery_date == date.today())
                        .filter((Delivery_Delivery.delivery_status == 10))
                        .count())

    return success_response({'data': total_stops})


@stats.route("/user/<int:user_id>", methods=["GET"])
def get_user_stats(user_id):
    """
    gets stats of user
    """
    logger.info(f"GET /stats/user/{user_id} - Fetching user statistics")
    get_user = db.session \
        .query(Stats_Customer) \
        .filter(Stats_Customer.customer_id == user_id) \
        .first()
    if get_user is None:
        new_stats = Stats_Customer(
                customer_id = user_id,
                total_calls = 1,
                service_calls_total = 0,
                service_calls_total_spent = 0,
                service_calls_total_profit = 0,
                oil_deliveries = 0,
                oil_total_gallons = 0,
                oil_total_spent = 0,
                oil_total_profit = 0,
        )
        db.session.add(new_stats)
        db.session.commit()
        get_user = db.session \
            .query(Stats_Customer) \
            .filter(Stats_Customer.customer_id == user_id) \
            .first()

    user_schema = Stats_Customer_schema(many=False)
    return success_response({"user_stats": user_schema.dump(get_user)})


@stats.route("/user/lastdelivery/<int:user_id>", methods=["GET"])
def get_user_last_delivery(user_id):
    """
    gets users last delivery.  used on profile page
    """
    logger.info(f"GET /stats/user/lastdelivery/{user_id} - Fetching user's last delivery date")
    get_delivery= db.session \
        .query(Delivery_Delivery) \
        .filter(Delivery_Delivery.customer_id == user_id) \
        .filter(Delivery_Delivery.delivery_status == 10) \
        .order_by(Delivery_Delivery.id.desc())\
        .first()
    if get_delivery:
        date_delivered = get_delivery.when_delivered
    else:
        date_delivered = "no deliveries on record"
    return success_response({'date': str(date_delivered)})


@stats.route("/gallons/week", methods=["GET"])
def total_gallons_delivered_this_week():
    logger.info("GET /stats/gallons/week - Calculating weekly gallons delivered")
    # Get today's date
    total_gallons = 0

    today = datetime.date.today()

    # Get the date of the Monday for today
    monday = get_monday_date(today)
    get_total = (db.session
                     .query(Delivery_Delivery)
                     .filter(Delivery_Delivery.when_delivered >= monday)
                     .filter(Delivery_Delivery.when_delivered <= today)
                     .all())
    for f in get_total:
        total_gallons = total_gallons + f.gallons_delivered
    return success_response({'total': total_gallons})

@stats.route("/gallons/check/total/<int:user_id>", methods=["GET"])
def calculate_gallons_user(user_id):
    logger.info(f"GET /stats/gallons/check/total/{user_id} - Recalculating user total gallons")
    # Get today's date
    total_gallons = 0


    # Get the date of the Monday for today

    get_total = (db.session
                     .query(Delivery_Delivery)
                     .filter(Delivery_Delivery.customer_id == user_id)
                     .all())
    get_user = db.session \
            .query(Stats_Customer) \
            .filter(Stats_Customer.customer_id == user_id) \
            .first()
    for f in get_total:
        total_gallons = total_gallons + f.gallons_delivered
    get_user.oil_total_gallons = total_gallons
    db.session.add(get_user)
    db.session.commit()
    return success_response()


@stats.route("/deliveries/daily", methods=["GET"])
def get_daily_delivery_stats():
    """
    Get daily delivery stats for a date range.
    Query Params: start_date (YYYY-MM-DD), end_date (YYYY-MM-DD)
    """
    start_date_str = request.args.get('start_date')
    end_date_str = request.args.get('end_date')

    logger.info(f"GET /stats/deliveries/daily - Fetching stats from {start_date_str} to {end_date_str}")

    try:
        start_date = datetime.datetime.strptime(start_date_str, '%Y-%m-%d').date()
        end_date = datetime.datetime.strptime(end_date_str, '%Y-%m-%d').date()
    except (ValueError, TypeError):
        return success_response({'error': 'Invalid date format. Use YYYY-MM-DD'}, 400)

    # Query daily aggregates
    daily_stats = db.session.query(
        Delivery_Delivery.when_delivered,
        func.sum(Delivery_Delivery.gallons_delivered).label('total_gallons'),
        func.count(Delivery_Delivery.id).label('total_count')
    ).filter(
        Delivery_Delivery.delivery_status == 10,  # Delivered status
        Delivery_Delivery.when_delivered >= start_date,
        Delivery_Delivery.when_delivered <= end_date
    ).group_by(
        Delivery_Delivery.when_delivered
    ).order_by(
        Delivery_Delivery.when_delivered
    ).all()

    result = []
    for day_stat in daily_stats:
        result.append({
            'date': day_stat.when_delivered.strftime('%Y-%m-%d'),
            'gallons': float(day_stat.total_gallons or 0),
            'count': int(day_stat.total_count or 0)
        })

    return success_response({'daily_stats': result})


@stats.route("/deliveries/totals", methods=["GET"])
def get_delivery_totals():
    """
    Get aggregated totals for a specific period compared to previous years.
    Query Params: period (day, month, year), date (YYYY-MM-DD)
    """
    period = request.args.get('period', 'day')
    date_str = request.args.get('date')

    logger.info(f"GET /stats/deliveries/totals - Fetching {period} totals for {date_str}")

    try:
        target_date = datetime.datetime.strptime(date_str, '%Y-%m-%d').date()
    except (ValueError, TypeError):
        # Default to today if invalid
        target_date = date.today()

    response_data = []

    # specific years to check - current year and last 3 years
    years_to_check = [target_date.year, target_date.year - 1, target_date.year - 2, target_date.year - 3]

    for year in years_to_check:
        # Calculate start/end based on period for this specific year
        if period == 'day':
            start = datetime.date(year, target_date.month, target_date.day)
            end = start
        elif period == 'month':
            start = datetime.date(year, target_date.month, 1)
            # Logic to get end of month
            next_month = start.replace(day=28) + datetime.timedelta(days=4)
            end = next_month - datetime.timedelta(days=next_month.day)
        elif period == 'year':
            start = datetime.date(year, 1, 1)
            end = datetime.date(year, 12, 31)
        else:
             return success_response({'error': 'Invalid period'}, 400)

        stats = db.session.query(
            func.sum(Delivery_Delivery.gallons_delivered).label('total_gallons'),
            func.count(Delivery_Delivery.id).label('total_count')
        ).filter(
            Delivery_Delivery.delivery_status == 10,
            Delivery_Delivery.when_delivered >= start,
            Delivery_Delivery.when_delivered <= end
        ).first()

        response_data.append({
            'year': year,
            'gallons': float(stats.total_gallons or 0) if stats else 0,
            'count': int(stats.total_count or 0) if stats else 0,
            'period_label': start.strftime('%Y-%m-%d') if period == 'day' else start.strftime('%b %Y') if period == 'month' else str(year)
        })

    return success_response({'totals': response_data})


# ============================================
# Stats Dashboard Endpoints (for Charts)
# ============================================

MONTH_NAMES = [
    '', 'January', 'February', 'March', 'April', 'May', 'June',
    'July', 'August', 'September', 'October', 'November', 'December'
]


@stats.route("/gallons/daily", methods=["GET"])
def get_gallons_daily():
    """
    Get daily gallons delivered for time-series chart.
    Query Params:
        - start_date: YYYY-MM-DD
        - end_date: YYYY-MM-DD
        - years: comma-separated list of years (e.g., 2024,2025,2026)
    Returns daily gallons grouped by date for each requested year.
    """
    from flask import request

    start_date_str = request.args.get('start_date')
    end_date_str = request.args.get('end_date')
    years_str = request.args.get('years', str(date.today().year))

    logger.info(f"GET /stats/gallons/daily - start={start_date_str}, end={end_date_str}, years={years_str}")

    try:
        start_date = datetime.datetime.strptime(start_date_str, '%Y-%m-%d').date()
        end_date = datetime.datetime.strptime(end_date_str, '%Y-%m-%d').date()
    except (ValueError, TypeError):
        return success_response({'ok': False, 'error': 'Invalid date format. Use YYYY-MM-DD'})

    try:
        years = [int(y.strip()) for y in years_str.split(',')]
    except ValueError:
        return success_response({'ok': False, 'error': 'Invalid years format'})

    result_years = []

    for year in years:
        # Adjust dates to the specific year while keeping month/day
        year_start = start_date.replace(year=year)
        year_end = end_date.replace(year=year)

        daily_data = db.session.query(
            func.date(Delivery_Delivery.when_delivered).label('delivery_date'),
            func.sum(Delivery_Delivery.gallons_delivered).label('gallons'),
            func.count(Delivery_Delivery.id).label('deliveries')
        ).filter(
            Delivery_Delivery.delivery_status == 10,
            Delivery_Delivery.when_delivered >= year_start,
            Delivery_Delivery.when_delivered <= year_end
        ).group_by(
            func.date(Delivery_Delivery.when_delivered)
        ).order_by(
            func.date(Delivery_Delivery.when_delivered)
        ).all()

        data_points = []
        for row in daily_data:
            data_points.append({
                'date': row.delivery_date.strftime('%Y-%m-%d') if row.delivery_date else None,
                'gallons': float(row.gallons or 0),
                'deliveries': int(row.deliveries or 0)
            })

        result_years.append({
            'year': year,
            'data': data_points
        })

    return success_response({'years': result_years})


@stats.route("/gallons/weekly", methods=["GET"])
def get_gallons_weekly():
    """
    Get weekly aggregated gallons delivered.
    Query Params:
        - start_date: YYYY-MM-DD
        - end_date: YYYY-MM-DD
        - years: comma-separated list of years
    Returns weekly gallons grouped by week number for each requested year.
    """
    from flask import request

    start_date_str = request.args.get('start_date')
    end_date_str = request.args.get('end_date')
    years_str = request.args.get('years', str(date.today().year))

    logger.info(f"GET /stats/gallons/weekly - start={start_date_str}, end={end_date_str}, years={years_str}")

    try:
        start_date = datetime.datetime.strptime(start_date_str, '%Y-%m-%d').date()
        end_date = datetime.datetime.strptime(end_date_str, '%Y-%m-%d').date()
    except (ValueError, TypeError):
        return success_response({'ok': False, 'error': 'Invalid date format. Use YYYY-MM-DD'})

    try:
        years = [int(y.strip()) for y in years_str.split(',')]
    except ValueError:
        return success_response({'ok': False, 'error': 'Invalid years format'})

    result_years = []

    for year in years:
        year_start = start_date.replace(year=year)
        year_end = end_date.replace(year=year)

        # Group by ISO week number
        weekly_data = db.session.query(
            extract('week', Delivery_Delivery.when_delivered).label('week_num'),
            func.min(Delivery_Delivery.when_delivered).label('week_start'),
            func.max(Delivery_Delivery.when_delivered).label('week_end'),
            func.sum(Delivery_Delivery.gallons_delivered).label('gallons'),
            func.count(Delivery_Delivery.id).label('deliveries')
        ).filter(
            Delivery_Delivery.delivery_status == 10,
            Delivery_Delivery.when_delivered >= year_start,
            Delivery_Delivery.when_delivered <= year_end
        ).group_by(
            extract('week', Delivery_Delivery.when_delivered)
        ).order_by(
            extract('week', Delivery_Delivery.when_delivered)
        ).all()

        data_points = []
        for row in weekly_data:
            data_points.append({
                'week_start': row.week_start.strftime('%Y-%m-%d') if row.week_start else None,
                'week_end': row.week_end.strftime('%Y-%m-%d') if row.week_end else None,
                'week_number': int(row.week_num) if row.week_num else 0,
                'gallons': float(row.gallons or 0),
                'deliveries': int(row.deliveries or 0)
            })

        result_years.append({
            'year': year,
            'data': data_points
        })

    return success_response({'years': result_years})


@stats.route("/gallons/monthly", methods=["GET"])
def get_gallons_monthly():
    """
    Get monthly aggregated gallons delivered.
    Query Params:
        - year: primary year to display
        - compare_years: comma-separated list of years to compare
    Returns monthly gallons for each requested year.
    """
    from flask import request

    year = request.args.get('year', type=int, default=date.today().year)
    compare_years_str = request.args.get('compare_years', '')

    logger.info(f"GET /stats/gallons/monthly - year={year}, compare_years={compare_years_str}")

    years = [year]
    if compare_years_str:
        try:
            compare_years = [int(y.strip()) for y in compare_years_str.split(',')]
            years.extend(compare_years)
        except ValueError:
            pass

    result_years = []

    for y in years:
        monthly_data = db.session.query(
            extract('month', Delivery_Delivery.when_delivered).label('month_num'),
            func.sum(Delivery_Delivery.gallons_delivered).label('gallons'),
            func.count(Delivery_Delivery.id).label('deliveries')
        ).filter(
            Delivery_Delivery.delivery_status == 10,
            extract('year', Delivery_Delivery.when_delivered) == y
        ).group_by(
            extract('month', Delivery_Delivery.when_delivered)
        ).order_by(
            extract('month', Delivery_Delivery.when_delivered)
        ).all()

        data_points = []
        for row in monthly_data:
            month_num = int(row.month_num) if row.month_num else 0
            data_points.append({
                'month': month_num,
                'month_name': MONTH_NAMES[month_num] if 1 <= month_num <= 12 else '',
                'gallons': float(row.gallons or 0),
                'deliveries': int(row.deliveries or 0)
            })

        result_years.append({
            'year': y,
            'data': data_points
        })

    return success_response({'years': result_years})


@stats.route("/totals/comparison", methods=["GET"])
def get_totals_comparison():
    """
    Get today/week-to-date/month-to-date/year-to-date totals with previous year comparison.
    Returns totals for current period compared to same period last year with % change.
    """
    logger.info("GET /stats/totals/comparison - Fetching comparison totals")

    today = date.today()
    current_year = today.year
    compare_year = current_year - 1

    def get_period_totals(start_date, end_date):
        """Helper to get gallons, deliveries, revenue for a date range."""
        result = db.session.query(
            func.coalesce(func.sum(Delivery_Delivery.gallons_delivered), 0).label('gallons'),
            func.count(Delivery_Delivery.id).label('deliveries'),
            func.coalesce(func.sum(Delivery_Delivery.final_price), 0).label('revenue')
        ).filter(
            Delivery_Delivery.delivery_status == 10,
            Delivery_Delivery.when_delivered >= start_date,
            Delivery_Delivery.when_delivered <= end_date
        ).first()
        return {
            'gallons': float(result.gallons or 0),
            'deliveries': int(result.deliveries or 0),
            'revenue': float(result.revenue or 0)
        }

    def calculate_comparison(current_val, previous_val):
        """Calculate % change and direction."""
        if previous_val == 0:
            change_percent = 100.0 if current_val > 0 else 0.0
        else:
            change_percent = ((current_val - previous_val) / previous_val) * 100

        if change_percent > 0:
            direction = 'up'
        elif change_percent < 0:
            direction = 'down'
        else:
            direction = 'neutral'

        return {
            'current': current_val,
            'previous': previous_val,
            'change_percent': round(change_percent, 1),
            'change_direction': direction
        }

    def build_period_comparison(current_start, current_end, prev_start, prev_end):
        """Build comparison object for a period."""
        current = get_period_totals(current_start, current_end)
        previous = get_period_totals(prev_start, prev_end)
        return {
            'gallons': calculate_comparison(current['gallons'], previous['gallons']),
            'deliveries': calculate_comparison(current['deliveries'], previous['deliveries']),
            'revenue': calculate_comparison(current['revenue'], previous['revenue'])
        }

    # Today comparison
    today_current = today
    today_prev = today.replace(year=compare_year)
    today_comparison = build_period_comparison(today_current, today_current, today_prev, today_prev)

    # Week-to-date comparison (Monday to today)
    monday_current = get_monday_date(today)
    monday_prev = monday_current.replace(year=compare_year)
    today_prev_week = today.replace(year=compare_year)
    wtd_comparison = build_period_comparison(monday_current, today, monday_prev, today_prev_week)

    # Month-to-date comparison
    first_of_month_current = today.replace(day=1)
    first_of_month_prev = first_of_month_current.replace(year=compare_year)
    today_prev_month = today.replace(year=compare_year)
    mtd_comparison = build_period_comparison(first_of_month_current, today, first_of_month_prev, today_prev_month)

    # Year-to-date comparison
    first_of_year_current = today.replace(month=1, day=1)
    first_of_year_prev = first_of_year_current.replace(year=compare_year)
    today_prev_year = today.replace(year=compare_year)
    ytd_comparison = build_period_comparison(first_of_year_current, today, first_of_year_prev, today_prev_year)

    comparison_data = {
        'today': today_comparison,
        'week_to_date': wtd_comparison,
        'month_to_date': mtd_comparison,
        'year_to_date': ytd_comparison
    }

    return success_response({
        'comparison': comparison_data,
        'current_year': current_year,
        'compare_year': compare_year
    })