<?php

namespace app\Controllers;

use app\Exceptions\AccountNotFoundException;
use app\Exceptions\CommentNotFoundException;
use app\Exceptions\InvalidRequestException;
use app\Exceptions\InvalidVideoException;
use app\Exceptions\UnauthenticatedException;
use app\Exceptions\VideoNotFoundException;
use app\Hajeebtok;
use app\Types\DatabaseObjects\View;
use Cassandra\Exception\UnauthorizedException;
use Exception;
use app\Exceptions\SecurityFaultException;
use Pecee\SimpleRouter\SimpleRouter;
use Mimey\MimeTypes;
use app\Interfaces\IRouteController;
use app\Types\DatabaseObjects\Video;
use app\Types\DatabaseObjects\Account;
use app\Logger;
use FFMpeg;

class VideoController implements IRouteController
{
	public static function getVideo(string $id): string
	{
		$signed_in = signed_in(request());

		$video_information = new Video($id);
		$video_information->Load();
		$mime_types = new MimeTypes();

		if ($signed_in) { // Signed in
			$video_path = APP_ROOT . "/usercontent/videos/$id/video.mp4";
		} else { // not signed in
			$rand = rand(1, 48);
			$video_path = APP_ROOT . "/usercontent/fake_videos/$rand/video.mp4";
		}

		CORSHelper();
		if (file_exists($video_path)) {
			$video_contents = file_get_contents($video_path);
			$video_size = filesize($video_path);

			$mime = $mime_types->getMimeType(pathinfo($video_path, PATHINFO_EXTENSION));

			$response = response();
			$response->header("Content-Type: $mime");
			$response->header("Content-Length: $video_size");
			$response->header("Cache-Control: max-age=86400, public");

			return $video_contents;
		} else {
			throw new VideoNotFoundException($id, 404);
		}
	}

	public static function getInfo(string $id): string
	{
		$video_information = new Video($id);
		$video_information->Load();
		$author_information = new Account($video_information->author_id);
		$author_information->Load();

		CORSHelper();
		return api_json([
			"id" => $video_information->id,
			"title" => $video_information->title,
			"description" => $video_information->description,
			"likes" => $video_information->likes,
			"dislikes" => $video_information->dislikes,
			"comments" => $video_information->comments,
			"shares" => $video_information->shares,
			"author" => [
				"id" => $author_information->id,
				"pictureHash" => $author_information->picture_hash,
				"username" => $author_information->username
			],
		]);
	}

	public static function search(): string
	{
		$query = input("query");
		$video = new Video(title: $query);
		$videos = $video->LoadMany();

		// idk if this is the greatest thing to do but jetbrains phpfart ai recommended it and it looks fine to me /shurg
		$accounts = Hajeebtok::$Database->Query("SELECT * FROM accounts WHERE id IN (SELECT author_id FROM videos WHERE title LIKE :title)", ["title" => "%$query%"]);
		if (empty($accounts)) throw new AccountNotFoundException(0, 404);

		$data = [];
		foreach ($videos as $vid) {
			$data[] = [
				"id" => $vid["id"],
				"title" => $vid["title"],
				"description" => $vid["description"],
				"likes" => $vid["likes"],
				"dislikes" => $vid["dislikes"],
				"comments" => Hajeebtok::$Database->Single("SELECT COUNT(*) FROM comments WHERE video_id = :id", ["id" => $vid["id"]]),
				"shares" => Hajeebtok::$Database->Single("SELECT COUNT(*) FROM messages INNER JOIN videos ON messages.video_id = videos.id WHERE videos.id = :id", ["id" => $vid["id"]]),
				"author" => [
					"id" => $vid["author_id"],
					"pictureHash" => $accounts[$vid["author_id"] - 1]["picture_hash"], // kinda scuffed fix
					"username" => $accounts[$vid["author_id"] - 1]["username"]
				],
			];
		}

		CORSHelper();
		return api_json($data);
	}

	public static function getThumbnail(string $id): string
	{
		$signed_in = signed_in(request());
		$video_information = new Video($id);
		$video_information->Load();

		if ($signed_in) { // Signed in
			$seconds = 2;
			$video_path = APP_ROOT . "/usercontent/videos/$id/video.mp4";
			$frame_path = APP_ROOT . "/usercontent/videos/$id/thumbnail.png";
		} else { // not signed in
			$rand = rand(1, 47);
			$seconds = 6;
			$video_path = APP_ROOT . "/usercontent/fake_videos/$rand/video.mp4";
			$frame_path = APP_ROOT . "/usercontent/fake_videos/$rand/thumbnail.png";
		}

		$mime_types = new MimeTypes();
		if (!file_exists($video_path)) throw new VideoNotFoundException($id, 404);
		if (!file_exists($frame_path)) {
			Logger::Debug("Generating thumbnail for video $id");

			$ffmpeg = FFMpeg\FFMpeg::create();
			$video = $ffmpeg->open($video_path);
			$frame = $video->frame(FFMpeg\Coordinate\TimeCode::fromSeconds($seconds));
			$frame->save($frame_path);
		}

		CORSHelper();
		$mime = $mime_types->getMimeType(pathinfo($frame_path, PATHINFO_EXTENSION));
		$response = response();
		$response->header("Content-Type: $mime");
		$response->header("Cache-Control: max-age=86400, public");

		return file_get_contents($frame_path);
	}

	public static function getFeed(): string
	{
		// todo: implement offset & limit
		$signed_in = signed_in(request());
		if (!$signed_in) throw new AccountNotFoundException(0, 404);
		$id = get_token_id(request());

		$feed = [];

		$videos = Hajeebtok::$Database->Query("SELECT * FROM videos WHERE id NOT IN (SELECT video_id FROM views WHERE account_id = :account_id AND video_id > :offset) ORDER BY id DESC", ["account_id" => $id,  "offset" => $offset]);
		foreach ($videos as $video) {
			$account = new Account($video["author_id"]);
			$account->Load();

			$feed[] = [
				"id" => $video["id"],
				"title" => $video["title"],
				"description" => $video["description"],
				"likes" => $video["likes"],
				"dislikes" => $video["dislikes"],
				"comments" => Hajeebtok::$Database->Single("SELECT COUNT(*) FROM comments WHERE video_id = :id", ["id" => $video["id"]]),
				"shares" => Hajeebtok::$Database->Single("SELECT COUNT(*) FROM messages INNER JOIN videos ON messages.video_id = videos.id WHERE videos.id = :id", ["id" => $video["id"]]),
				"author" => [
					"id" => $video["author_id"],
					"pictureHash" => $account->picture_hash,
					"username" => $account->username,
				],
			];
		}

		CORSHelper();
		return api_json($feed);
	}

	public static function uploadVideo(): string
	{
		if (!signed_in(request())) throw new UnauthenticatedException(0, 401);

		$video_file = input()->file("video");
		$title = input("title");
		$description = input("description");
		$author_id = get_token_id(request());
		if (empty($video_file) || empty($title) || empty($author_id)) throw new InvalidRequestException(0, 400);

		if (!file_exists($video_file->getTmpName()))
			throw new InvalidRequestException(400);

		// save database object
		$video = new Video(title: $title, description: $description, author_id: $author_id);
		$video->Save();

		// Save file
		$video_folder = APP_ROOT . "/usercontent/videos/" . $video->id;

		// check video file type
		$mimey = new MimeTypes();
		$mime_type = $mimey->getMimeType($video_file->getExtension());
		if ($mime_type != "video/mp4" && $mime_type != "video/ogg" && $mime_type != "video/webm" && $mime_type != "video/x-matroska") {
			$video->Delete();
			throw new InvalidVideoException($video->id, 415); // media type unsupported
		}

		// move video
		mkdir($video_folder);
		Logger::Debug($video_file->getFilename() . " -> " . $video_folder . "/video.mp4");
		$video_file->move($video_folder . "/video.mp4");

		CORSHelper();
		return api_json([
			"id" => $video->id,
			"title" => $video->title,
			"description" => $video->description,
			"likes" => $video->likes,
			"dislikes" => $video->dislikes,
			"comments" => 0,
			"shares" => 0,
			"author" => [
				"id" => $author_id,
			]
		]);
	}

	public static function RegisterRoutes(): void
	{
		SimpleRouter::group([
			"prefix" => "/video",
		], function () {
			SimpleRouter::get("/{id}/get", [VideoController::class, "getVideo"]);
			SimpleRouter::get("/{id}/info", [VideoController::class, "getInfo"]);
			SimpleRouter::get("/{id}/thumbnail", [VideoController::class, "getThumbnail"]);
			SimpleRouter::post("/upload", [VideoController::class, "uploadVideo"]);
			SimpleRouter::post("/search", [VideoController::class, "search"]);
			SimpleRouter::get("/feed", [VideoController::class, "getFeed"]);
			SimpleRouter::options("/{id}/get", "CORSHelper");
			SimpleRouter::options("/{id}/info", "CORSHelper");
			SimpleRouter::options("/{id}/thumbnail", "CORSHelper");
			SimpleRouter::options("/upload", "CORSHelper");
			SimpleRouter::options("/search", "CORSHelper");
		});
	}
}