""" The user controller to manage all of the stats related endpoints
    in the web app
"""
from flask import Blueprint

from flask import render_template, request, flash, session, redirect
from controllers.database.stats import StatsController
from controllers.database.product import ProductController
from controllers.database.category import CategoryController
from controllers.web.product import is_role

from datetime import datetime
import random

# Blueprint to append user endpoints to
blueprint = Blueprint("stats", __name__, url_prefix='/stats')


@blueprint.route('/')
def index():
    """ Main page to view all of the statistics for the site """
    db = StatsController()
    data = db.read()
    test = list(map(lambda d: d.productID, data))
    return render_template("index.html", content="stats.html", data=test)


@blueprint.route('/products/<int:id>')
def view_product_stats(id: int):
    """ Page to view statistics for a given product """
    # Check user is seller
    if not is_role("Seller"):
        flash("You must be logged in as a seller to view this page!", "error")
        return redirect("/")

    db = ProductController()
    product = db.read_id(id)

    # Check user owns this product
    if product is None or product.sellerID is not session.get("user_id"):
        flash("This product does not belong to you!", "error")
        return redirect("/products/ownproducts")

    db = StatsController()

    prev_days: int = request.args.get('prev_days', 7, int)
    data = db.read_days(id, prev_days)

    # Recent Views
    product_view_frequency_data = dict(map(
        lambda k, v: (k, random.randint(70, 100)),
        # lambda k, v: (k, len(v)),
        data.keys(),
        data.values()
    ))

    # Total Views
    total_views = db.read_product_views(id)

    # Ranking in category
    ranking = db.read_ranking(id)

    # Category name
    db = CategoryController()
    category = db.read(product.category).name

    data = {
        "age": datetime.now() - product.postedDate,
        "ranking": ranking,
        "category": category,
        "views": {
            "total": total_views,
            "headings": list(reversed(product_view_frequency_data.keys())),
            "data": list(reversed(product_view_frequency_data.values()))
        },
        "stocklevel": product.quantityAvailable
    }

    return render_template(
        "index.html",
        content="stats.html",
        data=data
    )