<?php
header("Content-type:application/json;charset=utf-8");

if (!isset($_GET["action"]))
    exit("null");
$action = $_GET["action"];

$db = new SQLite3(".fo76-dumps-ids.db", SQLITE3_OPEN_READONLY);
switch ($action) {
    case "get-meta":
        $results = $db->query("SELECT * FROM meta;");

        $meta = [];
        while ($row = $results->fetchArray())
            $meta[$row["key"]] = $row["value"];

        print(json_encode($meta));
        break;
    case "list-signatures":
        $results = $db->query("SELECT DISTINCT Signature FROM IDs ORDER BY Signature;");

        $signatures = [];
        while ($row = $results->fetchArray())
            array_push($signatures, $row["Signature"]);

        print(json_encode($signatures));
        break;
    case "get-random":
        if (!isset($_GET["signatures"])) {
            print("null");
            break;
        }
        if (empty($_GET["signatures"])) {
            print("null");
            break;
        }
        $signatures = $_GET["signatures"];

        $signatures = explode(",", $signatures);
        $in_params = implode(",", array_fill(0, count($signatures), "?"));

        $stmt = $db->prepare("SELECT * FROM IDs WHERE Signature IN ({$in_params}) ORDER BY RANDOM() LIMIT 1;");
        foreach ($signatures as $i => $signature)
            $stmt->bindValue($i + 1, $signature);
        $results = $stmt->execute();

        print(json_encode($results->fetchArray(SQLITE3_ASSOC)));
        break;
    default:
        print("null");
        break;
}
$db->close();