<?php

namespace App\Http\Controllers;

use App\Events\LiveStream\BanUser;
use App\Events\LiveStream\DeleteChatComment;
use App\Events\LiveStream\NewChatComment;
use App\Events\LiveStream\PinChatMessage;
use App\Events\LiveStream\StreamEnd;
use App\Events\LiveStream\StreamStart;
use App\Events\LiveStream\UnpinChatMessage;
use App\Models\LiveStream;
use App\Services\AccountService;
use App\Services\FollowerService;
use App\Services\LiveStreamService;
use App\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;

class LiveStreamController extends Controller
{
    public function createStream(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if(! $request->user(), 403);

        if (config('livestreaming.broadcast.limits.enabled')) {
            if ($request->user()->is_admin) {

            } else {
                $limits = config('livestreaming.broadcast.limits');
                $user = $request->user();
                abort_if($limits['admins_only'] && $user->is_admin == false, 401, 'LSE:003');
                if ($limits['min_account_age']) {
                    abort_if($user->created_at->gt(now()->subDays($limits['min_account_age'])), 403, 'LSE:005');
                }

                if ($limits['min_follower_count']) {
                    $account = AccountService::get($user->profile_id);
                    abort_if($account['followers_count'] < $limits['min_follower_count'], 403, 'LSE:008');
                }
            }
        }

        $this->validate($request, [
            'name' => 'nullable|string|max:80',
            'description' => 'nullable|string|max:240',
            'visibility' => 'required|in:public,private',
        ]);

        $stream = new LiveStream;
        $stream->name = $request->input('name');
        $stream->description = $request->input('description');
        $stream->visibility = $request->input('visibility');
        $stream->profile_id = $request->user()->profile_id;
        $stream->stream_id = Str::random(40).'_'.$stream->profile_id;
        $stream->stream_key = 'streamkey-'.Str::random(64);
        $stream->save();

        return [
            'host' => $stream->getStreamServer(),
            'key' => $stream->stream_key,
            'url' => $stream->getStreamKeyUrl(),
            'id' => $stream->stream_id,
        ];
    }

    public function getUserStream(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if(! $request->user(), 403);

        $stream = LiveStream::whereProfileId($request->input('profile_id'))
            ->whereNotNull('live_at')
            ->orderByDesc('live_at')
            ->first();

        if (! $stream) {
            return [];
        }

        $res = [];
        $owner = $request->user() ? $stream->profile_id == $request->user()->profile_id : false;

        if ($stream->visibility === 'private') {
            abort_if(! $owner && ! FollowerService::follows($request->user()->profile_id, $stream->profile_id), 403, 'LSE:011');
        }

        $res = [
            'hls_url' => $stream->getHlsUrl(),
            'name' => $stream->name,
            'description' => $stream->description,
        ];

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

    public function getUserStreamAsGuest(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);

        $stream = LiveStream::whereProfileId($request->input('profile_id'))
            ->whereVisibility('public')
            ->whereNotNull('live_at')
            ->orderByDesc('live_at')
            ->first();

        if (! $stream) {
            return [];
        }

        $res = [];

        $res = [
            'hls_url' => $stream->getHlsUrl(),
            'name' => $stream->name,
            'description' => $stream->description,
        ];

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

    public function showProfilePlayer(Request $request, $username)
    {
        abort_if(! config('livestreaming.enabled'), 400);

        $user = User::whereUsername($username)->firstOrFail();
        $id = (string) $user->profile_id;
        $stream = LiveStream::whereProfileId($id)
            ->whereNotNull('live_at')
            ->first();

        abort_if(! $request->user() && $stream && $stream->visibility !== 'public', 404);

        return view('live.player', compact('id'));
    }

    public function deleteStream(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if(! $request->user(), 403);

        LiveStream::whereProfileId($request->user()->profile_id)
            ->get()
            ->each(function ($stream) {
                Storage::deleteDirectory("public/live-hls/{$stream->stream_id}");
                LiveStreamService::clearChat($stream->profile_id);
                StreamEnd::dispatch($stream->profile_id);
                $stream->delete();
            });

        return [200];
    }

    public function getActiveStreams(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if(! $request->user(), 403);

        return LiveStream::whereIn('visibility', ['local', 'public'])->whereNotNull('live_at')->get()->map(function ($stream) {
            return [
                'account' => AccountService::get($stream->profile_id),
                'stream_id' => $stream->stream_id,
            ];
        });
    }

    public function getLatestChat(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if(! $request->user(), 403);

        $stream = LiveStream::whereProfileId($request->input('profile_id'))
            ->whereNotNull('live_at')
            ->first();

        if (! $stream) {
            return [];
        }

        $owner = $stream->profile_id == $request->user()->profile_id;
        if ($stream->visibility === 'private') {
            abort_if(! $owner && ! FollowerService::follows($request->user()->profile_id, $stream->profile_id), 403, 'LSE:021');
        }

        $res = collect(LiveStreamService::getComments($stream->profile_id))
            ->map(function ($res) {
                return json_decode($res);
            });

        return $res;
    }

    public function addChatComment(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if(! $request->user(), 403);

        $this->validate($request, [
            'profile_id' => 'required|exists:profiles,id',
            'message' => 'required|max:140',
        ]);

        $stream = LiveStream::whereProfileId($request->input('profile_id'))
            ->whereNotNull('live_at')
            ->firstOrFail();

        $owner = $stream->profile_id == $request->user()->profile_id;
        if ($stream->visibility === 'private') {
            abort_if(! $owner && ! FollowerService::follows($request->user()->profile_id, $stream->profile_id), 403);
        }

        $user = AccountService::get($request->user()->profile_id);

        abort_if(! $user, 422);

        $res = [
            'id' => (string) Str::uuid(),
            'pid' => (string) $request->user()->profile_id,
            'avatar' => $user['avatar'],
            'username' => $user['username'],
            'text' => $request->input('message'),
            'ts' => now()->timestamp,
        ];

        LiveStreamService::addComment($stream->profile_id, json_encode($res, JSON_UNESCAPED_SLASHES));
        NewChatComment::dispatch($stream, $res);

        return $res;
    }

    public function editStream(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if(! $request->user(), 403);

        $this->validate($request, [
            'name' => 'nullable|string|max:80',
            'description' => 'nullable|string|max:240',
        ]);

        $stream = LiveStream::whereProfileId($request->user()->profile_id)->firstOrFail();
        $stream->name = $request->input('name');
        $stream->description = $request->input('description');
        $stream->save();

    }

    public function deleteChatComment(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if(! $request->user(), 403);

        $this->validate($request, [
            'profile_id' => 'required|exists:profiles,id',
            'message' => 'required',
        ]);

        $uid = $request->user()->profile_id;
        $pid = $request->input('profile_id');
        $msg = $request->input('message');
        $admin = $uid == $request->input('profile_id');
        $owner = $uid == $msg['pid'];
        abort_if(! $admin && ! $owner, 403);

        $stream = LiveStream::whereProfileId($pid)->firstOrFail();

        $payload = $request->input('message');
        DeleteChatComment::dispatch($stream, $payload);
        $payload = json_encode($payload, JSON_UNESCAPED_SLASHES);
        LiveStreamService::deleteComment($stream->profile_id, $payload);

    }

    public function banChatUser(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if(! $request->user(), 403);

        $this->validate($request, [
            'profile_id' => 'required|exists:profiles,id',
        ]);

        abort_if($request->user()->profile_id == $request->input('profile_id'), 403);

        $stream = LiveStream::whereProfileId($request->user()->profile_id)->firstOrFail();
        $pid = $request->input('profile_id');

        BanUser::dispatch($stream, $pid);

    }

    public function pinChatComment(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if(! $request->user(), 403);

        $this->validate($request, [
            'profile_id' => 'required|exists:profiles,id',
            'message' => 'required',
        ]);

        $uid = $request->user()->profile_id;
        $pid = $request->input('profile_id');
        $msg = $request->input('message');

        abort_if($uid != $pid, 403);

        $stream = LiveStream::whereProfileId($request->user()->profile_id)->firstOrFail();
        PinChatMessage::dispatch($stream, $msg);

    }

    public function unpinChatComment(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if(! $request->user(), 403);

        $this->validate($request, [
            'profile_id' => 'required|exists:profiles,id',
            'message' => 'required',
        ]);

        $uid = $request->user()->profile_id;
        $pid = $request->input('profile_id');
        $msg = $request->input('message');

        abort_if($uid != $pid, 403);

        $stream = LiveStream::whereProfileId($request->user()->profile_id)->firstOrFail();
        UnpinChatMessage::dispatch($stream, $msg);

    }

    public function getConfig(Request $request)
    {
        $res = [
            'enabled' => (bool) config('livestreaming.enabled'),
            'broadcast' => [
                'sources' => config('livestreaming.broadcast.sources'),
                'limits' => config('livestreaming.broadcast.limits'),
            ],
        ];

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

    public function clientBroadcastPublish(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if($request->ip() != '127.0.0.1', 400);
        $key = $request->input('name');
        $name = $request->input('name');

        abort_if(! $name, 400);

        if (empty($key)) {
            abort_if(! $request->filled('tcurl'), 400);
            $url = $this->parseStreamUrl($request->input('tcurl'));
            $key = $request->filled('name') ? $request->input('name') : $url['name'];
        }

        $token = substr($name, 0, 10) === 'streamkey-';

        if ($token) {
            $stream = LiveStream::whereStreamKey($key)->firstOrFail();

            return redirect($stream->getStreamRtmpUrl(), 301);
        } else {
            $stream = LiveStream::whereStreamId($key)->firstOrFail();
        }

        StreamStart::dispatch($stream->profile_id);

        if ($request->filled('name') && $token == false) {
            $stream->live_at = now();
            $stream->save();

            return [];
        } else {
            abort(400);
        }

        abort(400);
    }

    public function clientBroadcastFinish(Request $request)
    {
        abort_if(! config('livestreaming.enabled'), 400);
        abort_if($request->ip() != '127.0.0.1', 400);
        $name = $request->input('name');
        $stream = LiveStream::whereStreamId($name)->firstOrFail();
        StreamEnd::dispatch($stream->profile_id);
        LiveStreamService::clearChat($stream->profile_id);

        if (config('livestreaming.broadcast.delete_token_after_finished')) {
            $stream->delete();
        } else {
            $stream->live_at = null;
            $stream->save();
        }

        return [];
    }

    protected function parseStreamUrl($url)
    {
        $name = null;
        $key = null;
        $query = parse_url($url, PHP_URL_QUERY);
        $parts = explode('&', $query);
        foreach ($parts as $part) {
            if (! strlen(trim($part))) {
                continue;
            }
            $s = explode('=', $part);
            if (in_array($s[0], ['name', 'key'])) {
                if ($s[0] === 'name') {
                    $name = $s[1];
                }
                if ($s[0] === 'key') {
                    $key = $s[1];
                }
            }
        }

        return ['name' => $name, 'key' => $key];
    }
}
