<?php

namespace App\Http\Controllers;

use App\Jobs\StoryPipeline\StoryViewDeliver;
use App\Profile;
use App\Services\AccountService;
use App\Services\FollowerService;
use App\Services\PollService;
use App\Services\StoryIndexService;
use App\Services\StoryService;
use App\Services\UserRoleService;
use App\Story;
use App\StoryView;
use App\Transformer\ActivityPub\Verb\StoryVerb;
use Cache;
use Illuminate\Http\Request;
use League\Fractal\Manager;
use League\Fractal\Resource\Item;
use League\Fractal\Serializer\ArraySerializer;
use Storage;

class StoryController extends StoryComposeController
{
    public function recent(Request $request)
    {
        abort_if(! (bool) config_cache('instance.stories.enabled') || ! $request->user(), 404);
        $user = $request->user();
        if ($user->has_roles && ! UserRoleService::can('can-use-stories', $user->id)) {
            return [];
        }
        $pid = $user->profile_id;

        if (config('database.default') == 'pgsql') {
            $s = Cache::remember('pf:stories:recent-by-id:'.$pid, 900, function () use ($pid) {
                return Story::select('stories.*', 'followers.following_id')
                    ->leftJoin('followers', 'followers.following_id', 'stories.profile_id')
                    ->where('followers.profile_id', $pid)
                    ->where('stories.active', true)
                    ->get()
                    ->map(function ($s) {
                        $r = new \StdClass;
                        $r->id = $s->id;
                        $r->profile_id = $s->profile_id;
                        $r->type = $s->type;
                        $r->path = $s->path;

                        return $r;
                    })
                    ->unique('profile_id');
            });

        } else {
            $s = Cache::remember('pf:stories:recent-by-id:'.$pid, 900, function () use ($pid) {
                return Story::select('stories.*', 'followers.following_id')
                    ->leftJoin('followers', 'followers.following_id', 'stories.profile_id')
                    ->where('followers.profile_id', $pid)
                    ->where('stories.active', true)
                    ->groupBy('followers.following_id')
                    ->orderByDesc('id')
                    ->get();
            });
        }

        $self = Cache::remember('pf:stories:recent-self:'.$pid, 21600, function () use ($pid) {
            return Story::whereProfileId($pid)
                ->whereActive(true)
                ->orderByDesc('id')
                ->limit(1)
                ->get()
                ->map(function ($s) use ($pid) {
                    $r = new \StdClass;
                    $r->id = $s->id;
                    $r->profile_id = $pid;
                    $r->type = $s->type;
                    $r->path = $s->path;

                    return $r;
                });
        });

        if ($self->count()) {
            $s->prepend($self->first());
        }

        $res = $s->map(function ($s) use ($pid) {
            $profile = AccountService::get($s->profile_id);
            $url = $profile['local'] ? url("/stories/{$profile['username']}") :
                url("/i/rs/{$profile['id']}");

            return [
                'pid' => $profile['id'],
                'avatar' => $profile['avatar'],
                'local' => $profile['local'],
                'username' => $profile['acct'],
                'latest' => [
                    'id' => $s->id,
                    'type' => $s->type,
                    'preview_url' => url(Storage::url($s->path)),
                ],
                'url' => $url,
                'seen' => StoryService::hasSeen($pid, StoryService::latest($s->profile_id)),
                'sid' => $s->id,
            ];
        })
            ->sortBy('seen')
            ->values();

        return response()->json($res, 200, [], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
    }

    public function profile(Request $request, $id)
    {
        abort_if(! (bool) config_cache('instance.stories.enabled') || ! $request->user(), 404);

        $user = $request->user();
        if ($user->has_roles && ! UserRoleService::can('can-use-stories', $user->id)) {
            return [];
        }
        $authed = $user->profile_id;
        $profile = Profile::findOrFail($id);

        if ($authed != $profile->id && ! FollowerService::follows($authed, $profile->id)) {
            abort(403);
        }

        $stories = Story::whereProfileId($profile->id)
            ->whereActive(true)
            ->orderBy('expires_at')
            ->get()
            ->map(function ($s, $k) use ($authed) {
                $seen = StoryService::hasSeen($authed, $s->id);
                $res = [
                    'id' => (string) $s->id,
                    'type' => $s->type,
                    'duration' => $s->duration,
                    'src' => url(Storage::url($s->path)),
                    'created_at' => $s->created_at->toAtomString(),
                    'expires_at' => $s->expires_at->toAtomString(),
                    'view_count' => ($authed == $s->profile_id) ? ($s->view_count ?? 0) : null,
                    'seen' => $seen,
                    'progress' => $seen ? 100 : 0,
                    'can_reply' => (bool) $s->can_reply,
                    'can_react' => (bool) $s->can_react,
                ];

                if ($s->type == 'poll') {
                    $res['question'] = json_decode($s->story, true)['question'];
                    $res['options'] = json_decode($s->story, true)['options'];
                    $res['voted'] = PollService::votedStory($s->id, $authed);
                    if ($res['voted']) {
                        $res['voted_index'] = PollService::storyChoice($s->id, $authed);
                    }
                }

                return $res;
            })->toArray();
        if (count($stories) == 0) {
            return [];
        }
        $cursor = count($stories) - 1;
        $stories = [[
            'id' => (string) $stories[$cursor]['id'],
            'nodes' => $stories,
            'account' => AccountService::get($profile->id),
            'pid' => (string) $profile->id,
        ]];

        return response()->json($stories, 200, [], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
    }

    public function viewed(Request $request)
    {
        abort_if(! (bool) config_cache('instance.stories.enabled') || ! $request->user(), 404);

        $this->validate($request, [
            'id' => 'required|min:1',
        ]);
        $id = $request->input('id');
        $user = $request->user();
        if ($user->has_roles && ! UserRoleService::can('can-use-stories', $user->id)) {
            return [];
        }
        $authed = $user->profile;

        $story = Story::with('profile')
            ->whereActive(true)
            ->findOrFail($id);
        $exp = $story->expires_at;

        $profile = $story->profile;

        if ($story->profile_id == $authed->id) {
            return [];
        }

        $publicOnly = (bool) $profile->followedBy($authed);
        abort_if(! $publicOnly, 403);

        $v = StoryView::firstOrCreate([
            'story_id' => $id,
            'profile_id' => $authed->id,
        ]);

        if ($v->wasRecentlyCreated) {
            Story::findOrFail($story->id)->increment('view_count');
            $index = app(StoryIndexService::class);
            $index->markSeen($authed->id, $story->profile_id, $story->id, $story->created_at);

            if ($story->local == false) {
                StoryViewDeliver::dispatch($story, $authed)->onQueue('story');
            }
        }

        Cache::forget('stories:recent:by_id:'.$authed->id);
        StoryService::addSeen($authed->id, $story->id);

        return ['code' => 200];
    }

    public function exists(Request $request, $id)
    {
        abort_if(! (bool) config_cache('instance.stories.enabled') || ! $request->user(), 404);
        $user = $request->user();
        if ($user->has_roles && ! UserRoleService::can('can-use-stories', $user->id)) {
            return response()->json(false);
        }

        return response()->json(Story::whereProfileId($id)
            ->whereActive(true)
            ->exists());
    }

    public function iRedirect(Request $request)
    {
        abort_if(! (bool) config_cache('instance.stories.enabled') || ! $request->user(), 404);

        $user = $request->user();
        abort_if(! $user, 404);
        $username = $user->username;

        return redirect("/stories/{$username}");
    }

    public function viewers(Request $request)
    {
        abort_if(! (bool) config_cache('instance.stories.enabled') || ! $request->user(), 404);

        $this->validate($request, [
            'sid' => 'required|string',
        ]);

        $user = $request->user();
        if ($user->has_roles && ! UserRoleService::can('can-use-stories', $user->id)) {
            return response()->json([]);
        }

        $pid = $request->user()->profile_id;
        $sid = $request->input('sid');

        $story = Story::whereProfileId($pid)
            ->whereActive(true)
            ->findOrFail($sid);

        $viewers = StoryView::whereStoryId($story->id)
            ->latest()
            ->simplePaginate(10)
            ->map(function ($view) {
                return AccountService::get($view->profile_id);
            })
            ->values();

        return response()->json($viewers, 200, [], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
    }

    public function remoteStory(Request $request, $id)
    {
        abort_if(! (bool) config_cache('instance.stories.enabled') || ! $request->user(), 404);

        $profile = Profile::findOrFail($id);
        if ($profile->user_id != null || $profile->domain == null) {
            return redirect('/stories/'.$profile->username);
        }
        $pid = $profile->id;

        return view('stories.show_remote', compact('pid'));
    }

    public function pollResults(Request $request)
    {
        abort_if(! (bool) config_cache('instance.stories.enabled') || ! $request->user(), 404);

        $this->validate($request, [
            'sid' => 'required|string',
        ]);

        $pid = $request->user()->profile_id;
        $sid = $request->input('sid');

        $story = Story::whereProfileId($pid)
            ->whereActive(true)
            ->findOrFail($sid);

        return PollService::storyResults($sid);
    }

    public function getActivityObject(Request $request, $username, $id)
    {
        abort_if(! (bool) config_cache('instance.stories.enabled'), 404);

        if (! $request->wantsJson()) {
            return redirect('/stories/'.$username);
        }

        abort_if(! $request->hasHeader('Authorization'), 404);

        $profile = Profile::whereUsername($username)->whereNull('domain')->firstOrFail();
        $story = Story::whereActive(true)->whereProfileId($profile->id)->findOrFail($id);

        abort_if($story->bearcap_token == null, 404);
        abort_if(now()->gt($story->expires_at), 404);
        $token = substr($request->header('Authorization'), 7);
        abort_if(hash_equals($story->bearcap_token, $token) === false, 404);
        abort_if($story->created_at->lt(now()->subMinutes(20)), 404);

        $fractal = new Manager;
        $fractal->setSerializer(new ArraySerializer);
        $resource = new Item($story, new StoryVerb);
        $res = $fractal->createData($resource)->toArray();

        return response()->json($res, 200, [], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
    }

    public function showSystemStory()
    {
        // return view('stories.system');
    }
}
