<?php

$_dr = $_SERVER['DOCUMENT_ROOT'];
// TODO: Make configurable in .ini

// Actual filesystem
$GLOBALS['path_root'] = '/srv/http/boorein';
$GLOBALS['path_media'] = $GLOBALS['path_root'] . '/media';
$GLOBALS['path_mediadb'] = $GLOBALS['path_root'] . '/media.db';
// Uri addressed
$GLOBALS['base_root'] =
  $_SERVER['REQUEST_SCHEME'] . '://' . $_SERVER['HTTP_HOST'];
$GLOBALS['base_media'] = 'media';

header('Content-Type: application/json');


include_once($_dr . '/item.php');
include_once($_dr . '/mediadb.php');
include_once($_dr . '/json.php');


// ----- ROUTER -----
(match ([$_SERVER['DOCUMENT_URI'], $_SERVER['REQUEST_METHOD']]) {
  ['/item',   'POST'] => post_item(),
  ['/item',   'GET']  => get_item(),
  ['/search', 'GET']  => get_search(),
  default  => Json::error('Not implemented')
})->die();


function get_item()
{
  $id = $_GET['q'] ?? false;
  if (!$id) Json::error('ID not specified')->die();

  $media_db = new MediaDB();

  $item = Item::load($media_db, $id);

  if ($item === null) {
    Json::error('No item was found with the given ID')->die();
  }

  return $item->getJson();
}


function post_item()
{
  // The checks are performed internally
  $item = Item::upload($_FILES['file'], $_POST['tags']);

  return $item->getJson();
};


function get_search()
{
  $query = $_GET['q'] ?? '';
  $limit = intval($_GET['limit'] ?? '20');
  // TODO: Implement page

  // If intval returns 0, it's an error
  if ($limit == 0) return Json::error('Invalid limit parameter');
  if ($query !== '') return Json::error('Search not implemented yet');

  $list = [];

  $db = new MediaDB();
  $db->map(function ($line) use (&$list, $limit) {
    if (count($list) >= $limit) return true;

    $list[] = Item::fromLine($line);

    return false;
  });

  return Json::new($list);
}