<?php

namespace app\Controllers;

use app\Exceptions\FollowNotFoundException;
use app\Exceptions\InvalidRequestException;
use app\Exceptions\UnauthenticatedException;
use app\Exceptions\VideoNotFoundException;
use app\Hajeebtok;
use app\Interfaces\IRouteController;
use app\Logger;
use app\Types\DatabaseObjects\Account;
use app\Types\DatabaseObjects\Follow;
use app\Types\DatabaseObjects\Link;
use app\Types\DatabaseObjects\Session;
use app\Types\LinkEnum;
use Exception;
use app\Exceptions\SecurityFaultException;
use Mimey\MimeTypes;
use Pecee\SimpleRouter\SimpleRouter;

class AccountController implements IRouteController
{
	public static function getToken(): string
	{
		$username = input("username");
		$password = password_hash(input("password"), PASSWORD_DEFAULT);

		$account = new Account(
			username: $username,
			password: $password,
			picture_hash: "default",
			verified: false
		);

		if ($account->Exists()) { // Account already exists
			$account->Load();
			if (password_verify($password, $account->password)) throw new UnauthenticatedException($account->id, 401);
			$session = new Session(account_id: $account->id);
		} else { // Create a new account
			$session = new Session(account_id: $account->Save());
		}

		CORSHelper();
		$token = $session->Save();
		$session->Load();
		return api_json([
			"token" => $token,
			"auth_date" => $session->date_authenticated
		]);
	}

	public static function getAccount($id): string
	{
		if (!signed_in(request())) {
			$usernames = explode(",", Hajeebtok::$Config->GetByDotKey("Service.FakeUsernames"));

			CORSHelper();
			return api_json([
				"id" => $id,
				"password" => "password1234",
				"username" => $usernames[rand(0, count($usernames) - 1)],
				"verified" => rand(1, 10) > 8,
				"bio" => "SIGN IN to see this EPIC content!!!",
				"followers" => rand(5, 38203),
				"following" => rand(5, 6243),
				"myself" => false,
				"links" => [],
				"socialCredit" => rand(-20223, 20223)
			]);
		}

		if ($id === "myself") $id = get_token_id(request());
		Logger::Debug($id);
		Logger::Debug("Getting account id ($id).");

		$account = new Account(id: $id);
		$account->Load();

		$followers = count(new Follow(followee_id: $id)->LoadMany());
		$following = count(new Follow(follower_id: $id)->LoadMany());

		try {
			$links = new Link(account_id: $id)->LoadMany();
		} catch (Exception $e) {
			$links = [];
		}


		CORSHelper();
		return api_json([
			"id" => $id,
			"username" => $account->username,
			"verified" => $account->verified,
			"bio" => $account->bio,
			"followers" => $followers,
			"following" => $following,
			"myself" => $id == get_token_id(request()),
			"links" => $links,
			"socialCredit" => $account->social_credit
		]);
	}

	public static function getVideos($id): string
	{
		if(!signed_in(request())) {
			$titles = explode(",", Hajeebtok::$Config->GetByDotKey("Service.FakeTitles"));
			$descriptions = explode(",", Hajeebtok::$Config->GetByDotKey("Service.FakeDescriptions"));
			$usernames = explode(",", Hajeebtok::$Config->GetByDotKey("Service.FakeUsernames"));

			$feed = [];

			for($i = 0; $i < rand(6, 20); $i++) {
				$feed[] = [
					"id" => rand(1, 10),
					"title" => $titles[rand(0, count($titles) - 1)],
					"description" => $descriptions[rand(0, count($descriptions) - 1)],
					"likes" => rand(20000, 37020),
					"dislikes" =>  rand(2, 12343),
					"comments" => rand(2, 1029),
					"shares" => rand(2, 200000),
					"author" => [
						"id" => rand(2, 59),
						"verified" => rand(1, 10) > 8,
						"username" => $usernames[rand(0, count($usernames) - 1)],
					],
				];
			}

			CORSHelper();
			return api_json($feed);
		}
		if ($id === "myself") $id = get_token_id(request());
		$account = new Account(id: $id);
		$video_number = intval(input("video") ?? "0");
		$data = Hajeebtok::$Database->Query("SELECT * FROM videos WHERE author_id = :author_id", ["author_id" => $account->id]);
		if (empty($data)) throw new VideoNotFoundException(0, 404);

		$videos = [];
		$valid_video = false;
		foreach ($data as $video) {
			if($video_number === 0) $valid_video = true;
			if($video["id"] === $video_number) $valid_video = true;
			if(!$valid_video) continue;

			$account = new Account($video["author_id"]);
			$account->Load();

			$videos[] = ["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"],
					"verified" => $account->verified,
					"username" => $account->username,
				],
			];
		}

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

	public static function getPicture($id): string
	{
		$signed_in = signed_in(request());
		if ($id === "myself") $id = get_token_id(request());

		if ($signed_in) {
			try {
				$account = new Account(id: $id);
				$account->Load();

				$picture_path = APP_ROOT . "/usercontent/pictures/$account->picture_hash.png";
			} catch (Exception $e) {
				$picture_path = APP_ROOT . "/usercontent/pictures/not_found.png";
			}
		} else {
			// this is hardcoded because i dont care
			$picture_path = APP_ROOT . "/usercontent/pictures/premium_" . rand(1, 57) . ".png";
		}

		$mimeTypes = new MimeTypes();

		$picture_contents = file_get_contents($picture_path);
		$picture_size = filesize($picture_path);

		$mime = $mimeTypes->getMimeType(pathinfo($picture_path, PATHINFO_EXTENSION));

		$response = response();
		$response->header("Content-Type: $mime");
		$response->header("Content-Length: $picture_size");
		$response->header("Cache-Control: max-age=3600, public");

		return $picture_contents;
	}

	public static function getAvailablePremiumProfilePictures(): string
	{
		$pictures = [];
		for ($i = 1; $i <= 47; $i++) {
			$pictures[] = $i;
		}

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

	public static function getPremiumProfilePicture($id): string
	{
		$picture_path = APP_ROOT . "/usercontent/pictures/premium_$id.png";

		$mime_types = new MimeTypes();

		$picture_contents = file_get_contents($picture_path);
		$picture_size = filesize($picture_path);

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

		$response = response();
		$response->header("Content-Type: $mime");
		$response->header("Content-Length: $picture_size");
		$response->header("Cache-Control: max-age=3600, public");

		return $picture_contents;
	}

	public static function updateAccount(): string
	{
		if (!signed_in(request())) throw new UnauthenticatedException(0, 401);
		$id = get_token_id(request());

		$picture_hash = input("picture_hash");
		$picture = request()->getInputHandler()->file("picture");
		$bio = input("bio");

		$valid_picture_hash_list = [
			"default",
			"premium_1",
			"premium_2",
			"premium_3",
			"premium_4",
			"premium_5",
			"premium_6",
			"premium_7",
			"premium_8",
			"premium_9",
			"premium_10",
			"premium_11",
			"premium_12",
			"premium_13",
			"premium_14",
			"premium_15",
			"premium_16",
			"premium_17",
			"premium_18",
			"premium_19",
			"premium_20",
			"premium_21",
			"premium_22",
			"premium_23",
			"premium_24",
			"premium_25",
			"premium_26",
			"premium_27",
			"premium_28",
			"premium_29",
			"premium_30",
			"premium_31",
			"premium_32",
			"premium_33",
			"premium_34",
			"premium_35",
			"premium_36",
			"premium_37",
			"premium_38",
			"premium_39",
			"premium_40",
			"premium_41",
			"premium_42",
			"premium_43",
			"premium_44",
			"premium_45",
			"premium_46",
			"premium_47",
			"premium_48",
			"premium_49",
			"premium_50",
			"premium_51",
			"premium_52",
			"premium_53",
			"premium_54",
			"premium_55",
			"premium_56",
			"premium_57"
		];
		if (empty($picture) && !empty($picture_hash)) {
			if (!in_array($picture_hash, $valid_picture_hash_list)) throw new SecurityFaultException("Attempt to path trace on /update endpoint.", 400);
		} else if (!empty($picture) && empty($picture_hash)) {
			$picture_hash = hash("sha256", $picture);
			$picture_path = APP_ROOT . "/usercontent/pictures/$picture_hash.png";

			$size = getimagesize($picture);
			$crop = min($size[0], $size[1]);
			$image_contents = file_get_contents($picture);
			$image_string = imagecreatefromstring($image_contents);
			$cropped_image = imagecrop($image_string, [
				"x" => 0,
				"y" => 0,
				"width" => $crop,
				"height" => $crop
			]);
			imagepng($cropped_image, $picture_path); // save image and crop and turn into png (i love php)
		} else if (!empty($picture) && !empty($picture_hash)) {
			throw new InvalidRequestException(400);
		}

		$old_account = new Account(id: $id);
		$old_account->Load();
		$new_account = new Account(
			id: $id,
			username: $old_account->username,
			password: $old_account->password,
			picture_hash: $picture_hash ?? $old_account->picture_hash,
			verified: $old_account->verified,
			bio: $bio ?? $old_account->bio,
		);

		CORSHelper();
		$new_account->Update();
		return api_json([
			"id" => $new_account->id,
			"username" => $new_account->username,
			"pictureHash" => in_array($new_account->picture_hash, $valid_picture_hash_list) ? $new_account->picture_hash : null,
			"bio" => $new_account->bio,
			"verified" => $new_account->verified,
		]);
	}

	public static function addLink(): string
	{
		if (!signed_in(request())) throw new UnauthenticatedException(0, 401);
		$account_id = get_token_id(request());
		$link = input("link");
		$link_type = input("linkType");

		$link_enum_type = LinkEnum::tryFrom($link_type);
		// todo: add enum type filtering

		$link = new Link(account_id: $account_id, type: $link_enum_type, url: $link);
		$link->Save();
		return api_json([
			"id" => $link->id,
			"url" => $link->url,
			"type" => $link->type->value,
			"account_id" => $link->account_id
		]);
	}

	public static function getFollowers($id): string
	{
		if ($id === "myself") $id = get_token_id(request());
		$followers = new Follow(followee_id: $id)->LoadMany();
		if (empty($followers)) throw new FollowNotFoundException(0, 404);
		for ($i = 0; $i < count($followers); $i++) {
			$follower = $followers[$i]["follower_id"];
			$account = new Account(id: $follower);
			$account->Load();

			$followers[$i] = [
				"followee_id" => (int)$id,
				"follower_id" => $follower,
				"username" => $account->username,
				"verified" => $account->verified
			];
		}
		return api_json($followers);
	}

	public static function getFollowing($id): string
	{
		if ($id === "myself") $id = get_token_id(request());
		$following = new Follow(follower_id: $id)->LoadMany();
		if (empty($following)) throw new FollowNotFoundException(0, 404);
		for ($i = 0; $i < count($following); $i++) {
			$followee = $following[$i]["followee_id"];
			$account = new Account(id: $followee);
			$account->Load();

			$following[$i] = [
				"followee_id" => $followee,
				"follower_id" => (int)$id,
				"username" => $account->username,
				"verified" => $account->verified
			];
		}
		return api_json($following);
	}

	public static function search(): string {
		$signed_in = signed_in(request());
		if(!$signed_in) {
			$data = [];
			$usernames = explode(",", Hajeebtok::$Config->GetByDotKey("Service.FakeUsernames"));

			for($i = 0; $i < rand(1, 13); $i++) {
				$data[] = [
					"id" => rand(2, 10232),
					"username" => $usernames[rand(0, count($usernames) - 1)],
					"socialCredit" => rand(-2032, 1209312),
					"following" => rand(0, 10232),
					"followers" => rand(0, 10232),
					"bio" => "SIGN IN to see this EPIC content!!",
					"verified" => rand(1, 10) > 8,
				];
			}

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

		$query = input("query");
		$account = new Account(username: $query);
		$data = $account->LoadMany();

		$accounts = [];
		foreach($data as $account) {
			$followers = count(new Follow(followee_id: $account["id"])->LoadMany());
			$following = count(new Follow(follower_id: $account["id"])->LoadMany());

			$accounts[] = [
				"id" => $account["id"],
				"username" => $account["username"],
				"socialCredit" => $account["social_credit"],
				"following" => $following,
				"followers" => $followers,
				"bio" => $account["bio"],
				"verified" => $account["verified"] === 1,
			];
		}

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

	public static function RegisterRoutes(): void
	{
		SimpleRouter::group([
			"prefix" => "/account/",
		], function () {
			SimpleRouter::get("/availablePremiumProfilePictures", [AccountController::class, "getAvailablePremiumProfilePictures"]);
			SimpleRouter::get("/getPremiumProfilePicture/{id}", [AccountController::class, "getPremiumProfilePicture"]);
			SimpleRouter::get("/{id}/get", [AccountController::class, "getAccount"]);
			SimpleRouter::get("/{id}/videos", [AccountController::class, "getVideos"]);
			SimpleRouter::get("/{id}/picture", [AccountController::class, "getPicture"]);
			//SimpleRouter::get("/{id}/followers", [AccountController::class, "getFollowers"]);
			//SimpleRouter::get("/{id}/following", [AccountController::class, "getFollowing"]);
			SimpleRouter::post("/token", [AccountController::class, "getToken"]);
			SimpleRouter::post("/update", [AccountController::class, "updateAccount"]);
			SimpleRouter::post("/addLink", [AccountController::class, "addLink"]);
			SimpleRouter::post("/search", [AccountController::class, "search"]);
			SimpleRouter::options("/update", "CORSHelper");
			SimpleRouter::options("/token", "CORSHelper");
			SimpleRouter::options("/{id}/get", "CORSHelper");
			SimpleRouter::options("/{id}/videos", "CORSHelper");
			SimpleRouter::options("/update", "CORSHelper");
			SimpleRouter::options("/availablePremiumProfilePictures", "CORSHelper");
			SimpleRouter::options("/getPremiumProfilePicture/{id}","CORSHelper");
			SimpleRouter::options("/search", "CORSHelper");
		});
	}
}