<?php
namespace App\Http\Controllers;

use App\Models\UsefulLink;
use App\Models\Configuration;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

class HomeController extends Controller
{
    const TIME_LEFT_BG_SUCCESS          = "bg-success";
    const TIME_LEFT_BG_WARNING          = "bg-warning";
    const TIME_LEFT_BG_DANGER           = "bg-danger";
    const TIME_LEFT_OUT_OF_CREDITS_TEXT = "You ran out of Credits";

    public function __construct()
    {
        $this->middleware('auth');
    }

    /**
    * @description Get the Background Color for the Days-Left-Box in HomeView
    *
    * @param  float  $days
    *
    * @return string
    */
    public function getTimeLeftBoxBackground($days)
    {
        switch ($days)
        {
            case ($days >= 15):
                return $this::TIME_LEFT_BG_SUCCESS;
            break;

            case ($days >= 8 && $days <= 14):
                return $this::TIME_LEFT_BG_WARNING;
            break;

            case ($days <= 7):
                return $this::TIME_LEFT_BG_DANGER;
            break;

            default:
                return $this::TIME_LEFT_BG_WARNING;
        }
    }

    /**
    * @description Get the Text for the Days-Left-Box in HomeView
    *
    * @param  string  $days
    * @param  string  $hours
    *
    * @return string
    */
    public function getTimeLeftBoxText(string $days, string $hours)
    {
        if ($days < 1)
        {
            if ($hours < 1)
            {
                return $this::TIME_LEFT_OUT_OF_CREDITS_TEXT;
            }
            else
            {
                return strval($hours);
            }
        }
        return strval(number_format($days, 0));
    }

    /**
    * @description Return either "days" or "hours" to use on the front-end
    *
    * @param  float  $days
    *
    * @return string
    */
    public function getTimeLeftUnit($days)
    {
        switch ($days)
        {
            case ($days < 1):
                return "hours";
            break;

            case ($days > 1):
                return "days";
            break;

            default:
                return "days";
        }
    }

    /** Show the application dashboard. */
    public function index(Request $request)
    {
        $usage = Auth::user()->creditUsage();
        $credits = Auth::user()->Credits();
        $bg = "";
        $boxText = "";
        $unit = "";

        /** Build our Time-Left-Box */
        if ($credits > 0.01 and $usage > 0)
        {
            $days = number_format(($credits * 30) / $usage, 2, '.', '');
            $hours = number_format($credits / ($usage / 30 / 24) , 2, '.', '');

            $bg = $this->getTimeLeftBoxBackground($days);
            $boxText = $this->getTimeLeftBoxText($days, $hours);
            $unit = $this->getTimeLeftUnit($days, $hours);

        }


        // RETURN ALL VALUES
        return view('home')->with([
            'useage' => $usage,
            'credits' => $credits,
            'useful_links' => UsefulLink::all()->sortBy('id'),
            'bg' => $bg,
            'boxText' => $boxText,
            'unit' => $unit
        ]);
    }

}