<?php

namespace App\Http\Controllers;

use App\Collection;
use App\CollectionItem;
use App\Services\AccountService;
use App\Services\CollectionService;
use App\Services\FollowerService;
use App\Services\StatusService;
use App\Status;
use Auth;
use Illuminate\Http\Request;

class CollectionController extends Controller
{
    public function create(Request $request)
    {
        abort_if(! Auth::check(), 403);
        $profile = Auth::user()->profile;

        $collection = Collection::firstOrCreate([
            'profile_id' => $profile->id,
            'published_at' => null,
        ]);
        $collection->visibility = 'draft';
        $collection->save();

        return view('collection.create', compact('collection'));
    }

    public function show(Request $request, $id)
    {
        $user = $request->user();
        $collection = CollectionService::getCollection($id);
        abort_if(! $collection, 404);
        if ($collection['published_at'] == null || $collection['visibility'] != 'public') {
            abort_if(! $user, 404);
            if ($user->profile_id != $collection['pid']) {
                if (! $user->is_admin) {
                    abort_if($collection['visibility'] != 'private', 404);
                    abort_if(! FollowerService::follows($user->profile_id, $collection['pid']), 404);
                }
            }
        }

        return view('collection.show', compact('collection'));
    }

    public function index(Request $request)
    {
        abort_if(! Auth::check(), 403);

        return $request->all();
    }

    public function store(Request $request, $id)
    {
        abort_if(! $request->user(), 403);
        $this->validate($request, [
            'title' => 'nullable|max:50',
            'description' => 'nullable|max:500',
            'visibility' => 'nullable|string|in:public,private,draft',
        ]);

        $pid = $request->user()->profile_id;
        $collection = Collection::whereProfileId($pid)->findOrFail($id);
        $collection->title = strip_tags($request->input('title'));
        $collection->description = strip_tags($request->input('description'));
        $collection->visibility = $request->input('visibility');
        $collection->save();

        CollectionService::deleteCollection($id);

        return CollectionService::setCollection($collection->id, $collection);
    }

    public function publish(Request $request, int $id)
    {
        abort_if(! $request->user(), 403);
        $this->validate($request, [
            'title' => 'nullable|max:50',
            'description' => 'nullable|max:500',
            'visibility' => 'required|alpha|in:public,private,draft',
        ]);
        $profile = Auth::user()->profile;
        $collection = Collection::whereProfileId($profile->id)->findOrFail($id);
        if ($collection->items()->count() == 0) {
            abort(404);
        }
        $collection->title = strip_tags($request->input('title'));
        $collection->description = strip_tags($request->input('description'));
        $collection->visibility = $request->input('visibility');
        $collection->published_at = now();
        $collection->save();

        return CollectionService::setCollection($collection->id, $collection);
    }

    public function delete(Request $request, int $id)
    {
        abort_if(! $request->user(), 403);
        $user = $request->user();

        $collection = Collection::whereProfileId($user->profile_id)->findOrFail($id);
        $collection->items()->delete();
        $collection->delete();

        CollectionService::deleteCollection($id);

        if ($request->wantsJson()) {
            return 200;
        }

        return redirect('/');
    }

    public function storeId(Request $request)
    {
        abort_if(! $request->user(), 403);

        $this->validate($request, [
            'collection_id' => 'required|int|min:1|exists:collections,id',
            'post_id' => 'required|int|min:1',
        ]);

        $profileId = $request->user()->profile_id;
        $collectionId = $request->input('collection_id');
        $postId = $request->input('post_id');

        $collection = Collection::whereProfileId($profileId)->findOrFail($collectionId);
        $count = $collection->items()->count();

        if ($count) {
            CollectionItem::whereCollectionId($collection->id)
                ->get()
                ->filter(function ($col) {
                    return StatusService::get($col->object_id, false) == null;
                })
                ->each(function ($col) use ($collectionId) {
                    CollectionService::removeItem($collectionId, $col->object_id);
                    $col->delete();
                });
        }

        $max = config('pixelfed.max_collection_length');
        if ($count >= $max) {
            abort(400, 'You can only add '.$max.' posts per collection');
        }

        $status = Status::whereIn('scope', ['public', 'unlisted'])
            ->whereProfileId($profileId)
            ->whereIn('type', ['photo', 'photo:album', 'video'])
            ->findOrFail($postId);

        $item = CollectionItem::firstOrCreate([
            'collection_id' => $collection->id,
            'object_type' => 'App\Status',
            'object_id' => $status->id,
        ], [
            'order' => $count,
        ]);

        CollectionService::deleteCollection($collection->id);

        $collection->updated_at = now();
        $collection->save();
        CollectionService::setCollection($collection->id, $collection);

        return StatusService::get($status->id, false);
    }

    public function getCollection(Request $request, $id)
    {
        $user = $request->user();
        $collection = CollectionService::getCollection($id);

        if (! $collection) {
            return response()->json([], 404);
        }

        if ($collection['published_at'] == null || $collection['visibility'] != 'public') {
            abort_unless($user, 404);
            if ($user->profile_id != $collection['pid']) {
                if (! $user->is_admin) {
                    abort_if($collection['visibility'] != 'private', 404);
                    abort_if(! FollowerService::follows($user->profile_id, $collection['pid']), 404);
                }
            }
        }

        return $collection;
    }

    public function getItems(Request $request, int $id)
    {
        $user = $request->user();
        $collection = CollectionService::getCollection($id);

        if (! $collection) {
            return response()->json([], 404);
        }

        if ($collection['published_at'] == null || $collection['visibility'] != 'public') {
            abort_unless($user, 404);
            if ($user->profile_id != $collection['pid']) {
                if (! $user->is_admin) {
                    abort_if($collection['visibility'] != 'private', 404);
                    abort_if(! FollowerService::follows($user->profile_id, $collection['pid']), 404);
                }
            }
        }
        $page = $request->input('page') ?? 1;
        $start = $page == 1 ? 0 : ($page * 10 - 10);
        $end = $start + 10;
        $items = CollectionService::getItems($id, $start, $end);

        return collect($items)
            ->map(function ($id) {
                return StatusService::get($id, false);
            })
            ->filter(function ($item) {
                return $item && ($item['visibility'] == 'public' || $item['visibility'] == 'unlisted') && isset($item['account'], $item['media_attachments']);
            })
            ->values();
    }

    public function getUserCollections(Request $request, int $id)
    {
        $user = $request->user();
        $pid = $user ? $user->profile_id : null;
        $follows = false;
        $visibility = ['public'];

        $profile = AccountService::get($id, true);
        if (! $profile || ! isset($profile['id'])) {
            return response()->json([], 404);
        }

        if ($pid) {
            $follows = FollowerService::follows($pid, $profile['id']);
        }

        if ($profile['locked']) {
            abort_if(! $pid, 404);
            if (! $user->is_admin) {
                abort_if($profile['id'] != $pid && $follows == false, 404);
            }
        }

        $owner = $pid ? $pid == $profile['id'] : false;

        if ($follows) {
            $visibility = ['public', 'private'];
        }

        if ($pid && $pid == $profile['id']) {
            $visibility = ['public', 'private', 'draft'];
        }

        return Collection::whereProfileId($profile['id'])
            ->whereIn('visibility', $visibility)
            ->when(! $owner, function ($q, $owner) {
                return $q->whereNotNull('published_at');
            })
            ->orderByDesc('id')
            ->paginate(9)
            ->map(function ($collection) {
                return CollectionService::getCollection($collection->id);
            });
    }

    public function deleteId(Request $request)
    {
        abort_if(! $request->user(), 403);
        $this->validate($request, [
            'collection_id' => 'required|int|min:1|exists:collections,id',
            'post_id' => 'required|int|min:1',
        ]);

        $profileId = $request->user()->profile_id;
        $collectionId = $request->input('collection_id');
        $postId = $request->input('post_id');

        $collection = Collection::whereProfileId($profileId)->findOrFail($collectionId);
        $count = $collection->items()->count();

        if ($count == 1) {
            abort(400, 'You cannot delete the only post of a collection!');
        }

        $status = Status::whereIn('scope', ['public', 'unlisted'])
            ->whereIn('type', ['photo', 'photo:album', 'video'])
            ->findOrFail($postId);

        $item = CollectionItem::whereCollectionId($collection->id)
            ->whereObjectType('App\Status')
            ->whereObjectId($status->id)
            ->firstOrFail();

        $item->delete();

        CollectionItem::whereCollectionId($collection->id)
            ->orderBy('created_at')
            ->get()
            ->each(function ($item, $index) {
                $item->order = $index;
                $item->save();
            });

        $collection->updated_at = now();
        $collection->save();
        CollectionService::deleteCollection($collection->id);

        return 200;
    }

    public function getSelfCollections(Request $request)
    {
        abort_if(! $request->user(), 404);
        $user = $request->user();
        $pid = $user->profile_id;

        $profile = AccountService::get($pid, true);
        if (! $profile || ! isset($profile['id'])) {
            return response()->json([], 404);
        }

        return Collection::whereProfileId($pid)
            ->orderByDesc('id')
            ->paginate(9)
            ->map(function ($collection) {
                $c = CollectionService::getCollection($collection->id);
                $c['items'] = collect(CollectionService::getItems($collection->id))
                    ->map(function ($id) {
                        return StatusService::get($id, false);
                    })->filter()->values();

                return $c;
            })
            ->filter()
            ->values();
    }
}
