<?php

/*
 * This file is part of Cachet.
 *
 * (c) Alt Three Services Limited
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace CachetHQ\Cachet\Http\Controllers;

use CachetHQ\Cachet\Facades\Setting;
use CachetHQ\Cachet\Models\Component;
use CachetHQ\Cachet\Models\ComponentGroup;
use CachetHQ\Cachet\Models\Incident;
use CachetHQ\Cachet\Models\Metric;
use CachetHQ\Cachet\Repositories\MetricRepository;
use Exception;
use GrahamCampbell\Binput\Facades\Binput;
use GrahamCampbell\Markdown\Facades\Markdown;
use Illuminate\Routing\Controller;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\View;
use Jenssegers\Date\Date;

class HomeController extends Controller
{
    /**
     * @var \CachetHQ\Cachet\Repositories\MetricRepository
     */
    protected $metricRepository;

    /**
     * Construct a new home controller instance.
     *
     * @param \CachetHQ\Cachet\Repositories\MetricRepository $metricRepository
     *
     * @return void
     */
    public function __construct(MetricRepository $metricRepository)
    {
        $this->metricRepository = $metricRepository;
    }

    /**
     * Displays the status page.
     *
     * @return \Illuminate\View\View
     */
    public function showIndex()
    {
        $today = Date::now();
        $startDate = Date::now();

        // Check if we have another starting date
        if (Binput::has('start_date')) {
            try {
                // If date provided is valid
                $oldDate = Date::createFromFormat('Y-m-d', Binput::get('start_date'));

                // If trying to get a future date fallback to today
                if ($today->gt($oldDate)) {
                    $startDate = $oldDate;
                }
            } catch (Exception $e) {
                // Fallback to today
            }
        }

        $metrics = null;
        $metricData = [];
        if ($displayMetrics = Setting::get('display_graphs')) {
            $metrics = Metric::where('display_chart', 1)->get();

            $metrics->map(function ($metric) use (&$metricData) {
                $metricData[$metric->id] = [
                    'today' => $this->metricRepository->listPointsToday($metric),
                    'week'  => $this->metricRepository->listPointsForWeek($metric),
                    'month' => $this->metricRepository->listPointsForMonth($metric),
                ];
            });
        }

        $daysToShow = Setting::get('app_incident_days') ?: 7;
        $incidentDays = range(0, $daysToShow - 1);
        $dateTimeZone = Setting::get('app_timezone');

        $incidentVisiblity = Auth::check() ? 0 : 1;

        $allIncidents = Incident::notScheduled()->where('visible', '>=', $incidentVisiblity)->whereBetween('created_at', [
            $startDate->copy()->subDays($daysToShow)->format('Y-m-d').' 00:00:00',
            $startDate->format('Y-m-d').' 23:59:59',
        ])->orderBy('created_at', 'desc')->get()->groupBy(function (Incident $incident) use ($dateTimeZone) {
            return (new Date($incident->created_at))
                ->setTimezone($dateTimeZone)->toDateString();
        });

        // Add in days that have no incidents
        foreach ($incidentDays as $i) {
            $date = (new Date($startDate))->setTimezone($dateTimeZone)->subDays($i);

            if (!isset($allIncidents[$date->toDateString()])) {
                $allIncidents[$date->toDateString()] = [];
            }
        }

        // Sort the array so it takes into account the added days
        $allIncidents = $allIncidents->sortBy(function ($value, $key) {
            return strtotime($key);
        }, SORT_REGULAR, true)->all();

        // Scheduled maintenance code.
        $scheduledMaintenance = Incident::scheduled()->orderBy('scheduled_at')->get();

        // Component & Component Group lists.
        $usedComponentGroups = Component::where('group_id', '>', 0)->groupBy('group_id')->lists('group_id');
        $componentGroups = ComponentGroup::whereIn('id', $usedComponentGroups)->orderBy('order')->get();
        $ungroupedComponents = Component::where('group_id', 0)->orderBy('order')->orderBy('created_at')->get();

        return View::make('index')
            ->withComponentGroups($componentGroups)
            ->withUngroupedComponents($ungroupedComponents)
            ->withDisplayMetrics($displayMetrics)
            ->withMetrics($metrics)
            ->withMetricData($metricData)
            ->withAllIncidents($allIncidents)
            ->withScheduledMaintenance($scheduledMaintenance)
            ->withAboutApp(Markdown::convertToHtml(Setting::get('app_about')))
            ->withCanPageForward((bool) $today->gt($startDate))
            ->withCanPageBackward(Incident::notScheduled()->where('created_at', '<', $startDate->format('Y-m-d'))->count() > 0)
            ->withPreviousDate($startDate->copy()->subDays($daysToShow)->toDateString())
            ->withNextDate($startDate->copy()->addDays($daysToShow)->toDateString())
            ->withPageTitle(Setting::get('app_name'));
    }
}