<?php
/**
 * Profile deleter script.
 *
 * Exposes an API to update an existing profile.
 *
 * It also saves the data to a JSON file in the data directory.
 *
 * Mandatory query parameters are:
 *  - id: Player ID.
 *
 * Mandatory DELETE parameters are:
 *  - key: User API key.
 *
 * @author Iñigo Valentin <i@inigovalentin.com>
 * @license https://www.gnu.org/licenses/gpl-3.0.en.html GNU General Public License V3
 * @package SWDB
 * @category API
 */

try{

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

    // Get put data
    $_DELETE = [];
    parse_str(file_get_contents("php://input"), $_DELETE);

    // Get profile ID
    /** @var mixed $query Request parameters, from API_CONTROLLER*/
    if (count($query) > 0){
        $player_id = $query[0];
    }
    else{
        // ID is mandatory
        header("HTTP/1.1 400 User ID not received.");
        syslog(LOG_INFO, "[APIv1] HTTP/1.1 400 User ID not received.");
        return 400;
    }

    // Check API key.
    $api_key = $_DELETE["key"];
    if ($api_key == null || $api_key == false){
        header("HTTP/1.1 400 API key not received.");
        syslog(LOG_INFO, "[APIv1] HTTP/1.1 400 API key not received.");
        return 400;
    }

    $db = get_context()->get_db();

    // Authenticate
    $statement = $db->prepare("
      SELECT COUNT(player.id) AS c 
      FROM
        user,
        player
      WHERE
        user.id = player.user AND
        player.id = :id AND
        user.api_key = :api_key;
    ");
    $statement->bindValue(":id", $player_id, SQLITE3_INTEGER);
    $statement->bindValue(":api_key", $api_key, SQLITE3_TEXT);
    if (1 != $statement->execute()->fetchArray(SQLITE3_ASSOC)["c"]){
        header("HTTP/1.1 401 Invalid credentials.");
        syslog(LOG_INFO, "[APIv1] HTTP/1.1 401 Invalid credentials.");
        return 401;
    }

    // Delete all player data
    $db->query("PRAGMA foreign_keys = OFF;");
    $statement = $db->prepare(
      "DELETE FROM unit_skill
      WHERE unit IN (SELECT id FROM unit WHERE player = :player);
    ");
    $statement->bindValue(":player", $player_id, SQLITE3_INTEGER);
    $statement->execute();
    $statement = $db->prepare("
      DELETE FROM unit_rune 
      WHERE unit IN (SELECT id FROM unit WHERE player = :player);
    ");
    $statement->bindValue(":player", $player_id, SQLITE3_INTEGER);
    $statement->execute();
    $statement = $db->prepare("
      DELETE FROM rune_stat
      WHERE rune IN (SELECT id FROM rune WHERE player = :player);
    ");
    $statement->bindValue(":player", $player_id, SQLITE3_INTEGER);
    $statement->execute();
    $statement = $db->prepare("
      DELETE FROM unit_artifact
      WHERE unit IN (SELECT id FROM unit WHERE player = :player);n        ");
    $statement->bindValue(":player", $player_id, SQLITE3_INTEGER);
    $statement->execute();
    $statement = $db->prepare("
      DELETE FROM artifact_stat
      WHERE artifact IN (SELECT id FROM artifact WHERE player = :player);n        ");
    $statement->bindValue(":player", $player_id, SQLITE3_INTEGER);
    $statement->execute();
    $statement = $db->prepare("
      DELETE FROM artifact_effect
      WHERE artifact IN (SELECT id FROM artifact WHERE player = :player);n        ");
    $statement->bindValue(":player", $player_id, SQLITE3_INTEGER);
    $statement->execute();
    $tables_to_clear = [
        "defense",
        "unit",
        "rune",
        "artifact",
        "building",
        "decoration",
        "item",
        "enchantment"
    ];
    foreach ($tables_to_clear as $table){
        $statement = $db->prepare("DELETE FROM $table WHERE player = :player;");
        $statement->bindValue(":player", $player_id, SQLITE3_INTEGER);
        $statement->execute();
    }
    $statement = $db->prepare("
      DELETE FROM player
      WHERE id = :id
    ");
    $statement->bindValue(":id", $player_id, SQLITE3_INTEGER);
    $statement->execute();

    header("HTTP/1.1 204 Profile deleted.");
    syslog(LOG_INFO, "[APIv1] HTTP/1.1 204 Profile deleted.");
    return 204;
}
catch(Exception $e) {
    header("HTTP/1.1 500 Unexpeced error: " . $e->getMessage());
    syslog(LOG_ERR, "[APIv1] HTTP/1.1 500 Unexpected error: " . $e->getMessage());
    return 500;
}