<?php

// !!! SET YOUR SQL-CONNECTION SETTINGS HERE: !!!

$hostname = '127.0.0.1';
$port     = 3306;
$username = 'root';
$password = '';
$database = 'bluemap';

// set this to "none" if you disabled compression on your maps
$hiresCompression = 'gzip';

// !!! END - DONT CHANGE ANYTHING AFTER THIS LINE !!!


// some helper functions
function error($code, $message = null) {
    global $path;

    http_response_code($code);
    header("Content-Type: text/plain");
    echo "BlueMap php-script - $code\n";
    if ($message != null) echo $message."\n";
    echo "Requested Path: $path";
    exit;
}

function startsWith($haystack, $needle) {
    return substr($haystack, 0, strlen($needle)) === $needle;
}

// mime-types for meta-files
$mimeDefault = "application/octet-stream";
$mimeTypes = [
    "txt" => "text/plain",
    "css" => "text/css",
    "csv" => "text/csv",
    "htm" => "text/html",
    "html" => "text/html",
    "js" => "text/javascript",
    "xml" => "text/xml",

    "png" => "image/png",
    "jpg" => "image/jpeg",
    "jpeg" => "image/jpeg",
    "gif" => "image/gif",
    "webp" => "image/webp",
    "tif" => "image/tiff",
    "tiff" => "image/tiff",
    "svg" => "image/svg+xml",

    "json" => "application/json",

    "mp3" => "audio/mpeg",
    "oga" => "audio/ogg",
    "wav" => "audio/wav",
    "weba" => "audio/webm",

    "mp4" => "video/mp4",
    "mpeg" => "video/mpeg",
    "webm" => "video/webm",

    "ttf" => "font/ttf",
    "woff" => "font/woff",
    "woff2" => "font/woff2"
];

function getMimeType($path) {
    global $mimeDefault, $mimeTypes;

    $i = strrpos($path, ".");
    if ($i === false) return $mimeDefault;

    $s = strrpos($path, "/");
    if ($s !== false && $i < $s) return $mimeDefault;

    $suffix = substr($path, $i + 1);
    if (isset($mimeTypes[$suffix]))
        return $mimeTypes[$suffix];

    return $mimeDefault;
}

// determine relative request-path
$root = dirname($_SERVER['PHP_SELF']);
if ($root === "/" || $root === "\\") $root = "";
$uriPath = $_SERVER['REQUEST_URI'];
$path = substr($uriPath, strlen($root));

// add / 
if ($path === "") {
    header("Location: $uriPath/");
    exit;
}

// root => index.html
if ($path === "/") {
    header("Content-Type: text/html");
    echo file_get_contents("index.html");
    exit;
}

if (startsWith($path, "/maps/")) {

    // determine map-path
    $pathParts = explode("/", substr($path, strlen("/maps/")), 2);
    $mapId = $pathParts[0];
    $mapPath = explode("?", $pathParts[1], 2)[0];

    // get sql-connection
    $sql = new mysqli($hostname, $username, $password, $database, $port);
    if ($sql->errno) error(500, "Failed to connect to Database!");

    // provide map-tiles
    if (startsWith($mapPath, "tiles/")) {

        // parse tile-coordinates
        preg_match_all("/tiles\/([\d\/]+)\/x(-?[\d\/]+)z(-?[\d\/]+).*/", $mapPath, $matches);
        $lod = intval($matches[1][0]);
        $tileX = intval(str_replace("/", "", $matches[2][0]));
        $tileZ = intval(str_replace("/", "", $matches[3][0]));
        $compression = $lod === 0 ? $hiresCompression : "none";

        // query for tile
        $statement = $sql->prepare("
            SELECT t.`data`
            FROM `bluemap_map_tile` t
             INNER JOIN `bluemap_map` m
              ON t.`map` = m.`id`
             INNER JOIN `bluemap_map_tile_compression` c
              ON t.`compression` = c.`id`
            WHERE m.`map_id` = ?
            AND t.`lod` = ?
            AND t.`x` = ?
            AND t.`z` = ?
            AND c.`compression` = ?
        ");
        $statement->bind_param("siiis", $mapId, $lod, $tileX, $tileZ, $compression);
        $statement->execute();
        if ($statement->errno) error(500, "Database query failed!");

        // return result
        $result = $statement->get_result();
        if ($result && $line = $result->fetch_assoc()) {
            if ($compression !== "none")
                header("Content-Encoding: $compression");

            if ($lod === 0) {
                header("Content-Type: application/json");
            } else {
                header("Content-Type: image/png");
            }

            echo $line["data"];
            exit;
        }

        // empty json response if nothing found
        header("Content-Type: application/json");
        echo "{}";
        exit;

    }

    // provide meta-files
    $statement = $sql->prepare("
        SELECT t.`value`
        FROM `bluemap_map_meta` t
         INNER JOIN `bluemap_map` m
          ON t.`map` = m.`id`
        WHERE m.`map_id` = ?
        AND t.`key` = ?
    ");
    $statement->bind_param("ss", $mapId, $mapPath);
    $statement->execute();
    if ($statement->errno) error(500, "Database query failed!");

    $result = $statement->get_result();
    if ($result && $line = $result->fetch_assoc()) {
        header("Content-Type: ".getMimeType($mapPath));
        echo $line["value"];
        exit;
    }

}

// no match => 404
error(404);