<?php

require_once __DIR__ . "/required.php";

function getgeojson($data) {
    global $SETTINGS;
    $geojson = [
        "status" => "OK"
    ];
    // If the data is an array, make a FeatureCollection
    // If there's no results, make an empty FeatureCollection
    if (count($data) == 0 || is_array($data[0])) {
        $geojson["type"] = "FeatureCollection";
        $geojson["results"] = count($data);
        $geojson["max_results"] = $SETTINGS["max_results"];
        $geojson["features"] = [];

        foreach ($data as $item) {
            $geojson["features"][] = [
                "type" => "Feature",
                "geometry" => [
                    "type" => "Point",
                    "coordinates" => [
                        $item["longitude"] * 1.0,
                        $item["latitude"] * 1.0
                    ]
                ],
                "properties" => [
                    "osmid" => $item["osmid"] * 1,
                    "name" => $item["name"],
                    "typeid" => $item["typeid"] * 1,
                    "type" => $item["type"],
                    "eletype" => $item["eletype"]
                ]
            ];
        }
    } else {
        $geojson["type"] = "Feature";
        $geojson["geometry"] = [
            "type" => "Point",
            "coordinates" => [
                $data["longitude"] * 1.0,
                $data["latitude"] * 1.0
            ]
        ];
        $geojson["properties"] = [
            "osmid" => $data["osmid"] * 1,
            "name" => $data["name"],
            "typeid" => $data["typeid"] * 1,
            "type" => $data["type"],
            "eletype" => $data["eletype"]
        ];
    }

    return $geojson;
}

$where = [];

$validations = [
    "osmid" => "/[0-9]+/",
    "typeid" => "/[1-9]+/",
    "type" => "/[A-Z]+_[A-Z]+",
    "latitude" => "/[0-9]{0,3}\.[0-9]{2,10}/",
    "longitude" => "/[0-9]{0,3}\.[0-9]{2,10}/",
    "radius_km" => "/[0-9]+/",
    "radius_mi" => "/[0-9]+/"
];

foreach ($validations as $name => $regex) {
    if (!empty($_GET[$name])) {
        if (is_array($_GET[$name])) {
            foreach ($_GET[$name] as $t) {
                if (!preg_match($regex, $t)) {
                    exit("[]");
                }
            }
        } else {
            if (!preg_match($regex, $_GET[$name])) {
                exit("[]");
            }
        }
        if (preg_match("/(osmid|typeid|type)/", $name)) {
            $where[$name] = $_GET[$name];
        }
    }
}

// Calculate bounding box
use AnthonyMartin\GeoLocation\GeoLocation as GeoLocation;

if (!empty($_GET["latitude"]) && !empty($_GET["longitude"])) {

    $userlocation = GeoLocation::fromDegrees($_GET["latitude"], $_GET["longitude"]);

    $radius = $SETTINGS["default_radius"];
    if (!empty($_GET["radius_km"])) {
        $radius = $_GET["radius_km"] * 1.0;
    } else if (!empty($_GET["radius_mi"])) {
        $radius = $_GET["radius_mi"] / 0.62137;
    }
    $searchbounds = $userlocation->boundingCoordinates($radius, "kilometers");

    $where["latitude[<>]"] = [$searchbounds[0]->getLatitudeInDegrees(), $searchbounds[1]->getLatitudeInDegrees()];
    $where["longitude[<>]"] = [$searchbounds[0]->getLongitudeInDegrees(), $searchbounds[1]->getLongitudeInDegrees()];
}

// Remove database ambiguity
foreach ($where as $key => $value) {
    if ($key == "typeid") {
        $where["poi.typeid"] = $value;
        unset($where["typeid"]);
    }
}

if (count($where) > 1) {
    $where = ["AND" => $where];
}

$where["LIMIT"] = $SETTINGS["max_results"];


ob_flush();
$database->debug()->select("poi", ["[>]types" => "typeid"], ["osmid", "poi.typeid", "type", "latitude", "longitude", "eletype", "name"], $where);
$query = ob_get_contents();
ob_clean();
$results = $database->query($query)->fetchAll();

$geojson = getgeojson($results);

if ($SETTINGS["debug"]) {
    $geojson["query"] = $query;
}

if (empty($_GET["pretty"])) {
    exit(json_encode($geojson));
}
exit(json_encode($geojson, JSON_PRETTY_PRINT));