<?php

namespace App\Http\Controllers;

use App\AccountInterstitial;
use App\Follower;
use App\FollowRequest;
use App\Profile;
use App\Services\AccountService;
use App\Services\FollowerService;
use App\Services\StatusService;
use App\Status;
use App\Story;
use App\Transformer\ActivityPub\ProfileTransformer;
use App\User;
use App\UserFilter;
use App\UserSetting;
use Auth;
use Cache;
use Illuminate\Http\Request;
use League\Fractal;
use View;

class ProfileController extends Controller
{
    public function show(Request $request, $username)
    {
        if ($request->wantsJson() && (bool) config_cache('federation.activitypub.enabled')) {
            $user = $this->getCachedUser($username, true);
            abort_if(! $user, 404, 'Not found');

            return $this->showActivityPub($request, $user);
        }

        // redirect authed users to Metro 2.0
        if ($request->user()) {
            // unless they force static view
            if (! $request->has('fs') || $request->input('fs') != '1') {
                $pid = AccountService::usernameToId($username);
                if ($pid) {
                    return redirect('/i/web/profile/'.$pid);
                }
            }
        }

        $user = $this->getCachedUser($username);

        abort_unless($user, 404);

        $aiCheck = Cache::remember('profile:ai-check:spam-login:'.$user->id, 3600, function () use ($user) {
            $exists = AccountInterstitial::whereUserId($user->user_id)->where('is_spam', 1)->count();
            if ($exists) {
                return true;
            }

            return false;
        });
        if ($aiCheck) {
            return redirect('/login');
        }

        return $this->buildProfile($request, $user);
    }

    protected function buildProfile(Request $request, $user)
    {
        $username = $user->username;
        $loggedIn = Auth::check();
        $isPrivate = false;
        $isBlocked = false;
        if (! $loggedIn) {
            $key = 'profile:settings:'.$user->id;
            $ttl = now()->addHours(6);
            $settings = Cache::remember($key, $ttl, function () use ($user) {
                return $user->user->settings;
            });

            if ($user->is_private == true) {
                $profile = null;

                return view('profile.private', compact('user'));
            }

            $owner = false;
            $is_following = false;

            $profile = $user;
            $settings = [
                'crawlable' => $settings->crawlable,
                'following' => [
                    'count' => $settings->show_profile_following_count,
                    'list' => $settings->show_profile_following,
                ],
                'followers' => [
                    'count' => $settings->show_profile_follower_count,
                    'list' => $settings->show_profile_followers,
                ],
            ];

            return view('profile.show', compact('profile', 'settings'));
        } else {
            $key = 'profile:settings:'.$user->id;
            $ttl = now()->addHours(6);
            $settings = Cache::remember($key, $ttl, function () use ($user) {
                return $user->user->settings;
            });

            if ($user->is_private == true) {
                $isPrivate = $this->privateProfileCheck($user, $loggedIn);
            }

            $isBlocked = $this->blockedProfileCheck($user);

            $owner = $loggedIn && Auth::id() === $user->user_id;
            $is_following = ($owner == false && Auth::check()) ? $user->followedBy(Auth::user()->profile) : false;

            if ($isPrivate == true || $isBlocked == true) {
                $requested = Auth::check() ? FollowRequest::whereFollowerId(Auth::user()->profile_id)
                    ->whereFollowingId($user->id)
                    ->exists() : false;

                return view('profile.private', compact('user', 'is_following', 'requested'));
            }

            $is_admin = is_null($user->domain) ? $user->user->is_admin : false;
            $profile = $user;
            $settings = [
                'crawlable' => $settings->crawlable,
                'following' => [
                    'count' => $settings->show_profile_following_count,
                    'list' => $settings->show_profile_following,
                ],
                'followers' => [
                    'count' => $settings->show_profile_follower_count,
                    'list' => $settings->show_profile_followers,
                ],
            ];

            return view('profile.show', compact('profile', 'settings'));
        }
    }

    protected function getCachedUser($username, $withTrashed = false)
    {
        $val = str_replace(['_', '.', '-'], '', $username);
        if (! ctype_alnum($val)) {
            return;
        }
        $hash = ($withTrashed ? 'wt:' : 'wot:').strtolower($username);

        return Cache::remember('pfc:cached-user:'.$hash, ($withTrashed ? 14400 : 900), function () use ($username, $withTrashed) {
            if (! $withTrashed) {
                return Profile::whereNull(['domain', 'status'])
                    ->whereUsername($username)
                    ->first();
            } else {
                return Profile::withTrashed()
                    ->whereNull('domain')
                    ->whereUsername($username)
                    ->first();
            }
        });
    }

    public function permalinkRedirect(Request $request, $username)
    {
        if ($request->wantsJson() && (bool) config_cache('federation.activitypub.enabled')) {
            $user = $this->getCachedUser($username, true);

            return $this->showActivityPub($request, $user);
        }

        $user = $this->getCachedUser($username);

        return redirect($user->url());
    }

    protected function privateProfileCheck(Profile $profile, $loggedIn)
    {
        if (! Auth::check()) {
            return true;
        }

        $user = Auth::user()->profile;
        if ($user->id == $profile->id || ! $profile->is_private) {
            return false;
        }

        $follows = Follower::whereProfileId($user->id)->whereFollowingId($profile->id)->exists();
        if ($follows == false) {
            return true;
        }

        return false;
    }

    public static function accountCheck(Profile $profile)
    {
        switch ($profile->status) {
            case 'disabled':
            case 'suspended':
            case 'delete':
                return view('profile.disabled');
                break;

            default:
                break;
        }

        return abort(404);
    }

    protected function blockedProfileCheck(Profile $profile)
    {
        $pid = Auth::user()->profile->id;
        $blocks = UserFilter::whereUserId($profile->id)
            ->whereFilterType('block')
            ->whereFilterableType('App\Profile')
            ->pluck('filterable_id')
            ->toArray();
        if (in_array($pid, $blocks)) {
            return true;
        }

        return false;
    }

    public function showActivityPub(Request $request, $user)
    {
        abort_if(! config_cache('federation.activitypub.enabled'), 404);
        abort_if(! $user, 404, 'Not found');
        abort_if($user->domain, 404);

        return Cache::remember('pf:activitypub:user-object:by-id:'.$user->id, 1800, function () use ($user) {
            $fractal = new Fractal\Manager();
            $resource = new Fractal\Resource\Item($user, new ProfileTransformer);
            $res = $fractal->createData($resource)->toArray();

            return response(json_encode($res['data']))->header('Content-Type', 'application/activity+json');
        });
    }

    public function showAtomFeed(Request $request, $user)
    {
        abort_if(! config('federation.atom.enabled'), 404);

        $pid = AccountService::usernameToId($user);

        abort_if(! $pid, 404);

        $profile = AccountService::get($pid, true);

        abort_if(! $profile || $profile['locked'] || ! $profile['local'], 404);

        $aiCheck = Cache::remember('profile:ai-check:spam-login:'.$profile['id'], 86400, function () use ($profile) {
            $uid = User::whereProfileId($profile['id'])->first();
            if (! $uid) {
                return true;
            }
            $exists = AccountInterstitial::whereUserId($uid->id)->where('is_spam', 1)->count();
            if ($exists) {
                return true;
            }

            return false;
        });

        abort_if($aiCheck, 404);

        $enabled = Cache::remember('profile:atom:enabled:'.$profile['id'], 84600, function () use ($profile) {
            $uid = User::whereProfileId($profile['id'])->first();
            if (! $uid) {
                return false;
            }
            $settings = UserSetting::whereUserId($uid->id)->first();
            if (! $settings) {
                return false;
            }

            return $settings->show_atom;
        });

        abort_if(! $enabled, 404);

        $data = Cache::remember('pf:atom:user-feed:by-id:'.$profile['id'], 14400, function () use ($pid, $profile) {
            $items = Status::whereProfileId($pid)
                ->whereScope('public')
                ->whereIn('type', ['photo', 'photo:album'])
                ->orderByDesc('id')
                ->take(10)
                ->get()
                ->map(function ($status) {
                    return StatusService::get($status->id, true);
                })
                ->filter(function ($status) {
                    return $status &&
                        isset($status['account']) &&
                        isset($status['media_attachments']) &&
                        count($status['media_attachments']);
                })
                ->values();
            $permalink = config('app.url')."/users/{$profile['username']}.atom";
            $headers = ['Content-Type' => 'application/atom+xml'];

            if ($items && $items->count()) {
                $headers['Last-Modified'] = now()->parse($items->first()['created_at'])->toRfc7231String();
            }

            return compact('items', 'permalink', 'headers');
        });
        abort_if(! $data || ! isset($data['items']) || ! isset($data['permalink']), 404);

        return response()
            ->view('atom.user',
                [
                    'profile' => $profile,
                    'items' => $data['items'],
                    'permalink' => $data['permalink'],
                ]
            )
            ->withHeaders($data['headers']);
    }

    public function meRedirect()
    {
        abort_if(! Auth::check(), 404);

        return redirect(Auth::user()->url());
    }

    public function embed(Request $request, $username)
    {
        $res = view('profile.embed-removed');

        if (! (bool) config_cache('instance.embed.profile')) {
            return response($res)->withHeaders(['X-Frame-Options' => 'ALLOWALL']);
        }

        if (strlen($username) > 15 || strlen($username) < 2) {
            return response($res)->withHeaders(['X-Frame-Options' => 'ALLOWALL']);
        }

        $profile = $this->getCachedUser($username);

        if (! $profile || $profile->is_private) {
            return response($res)->withHeaders(['X-Frame-Options' => 'ALLOWALL']);
        }

        $aiCheck = Cache::remember('profile:ai-check:spam-login:'.$profile->id, 86400, function () use ($profile) {
            $exists = AccountInterstitial::whereUserId($profile->user_id)->where('is_spam', 1)->count();
            if ($exists) {
                return true;
            }

            return false;
        });

        if ($aiCheck) {
            return response($res)->withHeaders(['X-Frame-Options' => 'ALLOWALL']);
        }

        if (AccountService::canEmbed($profile->user_id) == false) {
            return response($res)->withHeaders(['X-Frame-Options' => 'ALLOWALL']);
        }

        $profile = AccountService::get($profile->id);
        $res = view('profile.embed', compact('profile'));

        return response($res)->withHeaders(['X-Frame-Options' => 'ALLOWALL']);
    }

    public function stories(Request $request, $username)
    {
        abort_if(! config_cache('instance.stories.enabled') || ! $request->user(), 404);
        $profile = Profile::whereNull('domain')->whereUsername($username)->firstOrFail();
        $pid = $profile->id;
        $authed = Auth::user()->profile_id;
        abort_if($pid != $authed && ! FollowerService::follows($authed, $pid), 404);
        $exists = Story::whereProfileId($pid)
            ->whereActive(true)
            ->exists();
        abort_unless($exists, 404);

        return view('profile.story', compact('pid', 'profile'));
    }
}