<?php
/**
 * Config file for the Last Days of Rome.
 *
 * PHP version: 8.0+
 *
 * @category API
 * @package  Rome
 * @author   Keith Solomon <keith@keithsolmon.net>
 * @license  MIT License
 * @version  GIT: $Id$
 * @link     https://git.keithsolomon.net/keith/Warframe_Shopping_List
 */

session_start();

require_once 'database.php';

// Fetch configuration from the database
$stmt = $db->query('SELECT * FROM configuration');
$config = $stmt->fetchAll(PDO::FETCH_KEY_PAIR);

if (!isset($_SESSION['scores'])) {
    $_SESSION['scores'] = [
        'flames' => 0,
        'desolation' => 0,
        'relocation' => 0,
    ];
}

$action = $_GET['action'] ?? '';

if ($action === 'roll_dice') {
    $event = roll_dice($config);
    $gameState = checkGameState($config);

    if ($gameState !== 'ongoing') {
        logGame($gameState);
    }

    echo json_encode(
        [
            'scores' => $_SESSION['scores'],
            'event' => $event,
            'gameState' => $gameState,
        ]
    );
} elseif ($action === 'assassinate') {
    $assassinationResult = assassinate($config);

    if ($assassinationResult['gameState'] !== 'ongoing') {
        logGame($assassinationResult['gameState']);
    }

    echo json_encode(
        [
            'event' => $assassinationResult['event'],
            'gameState' => $assassinationResult['gameState'],
        ]
    );
} elseif ($action === 'reset_game') {
    $_SESSION['scores'] = [
        'flames' => 0,
        'desolation' => 0,
        'relocation' => 0,
    ];

    echo json_encode(
        [
            'scores' => $_SESSION['scores'],
        ]
    );
}

/**
 * Rolls a dice and determines the event based on the result.
 *
 * @param array $config The game configuration.
 *
 * @return string The event description.
 */
function rollDice($config) {
    $roll = rand(1, 6);
    $event = '';

    if ($roll <= 3) {
        $event = 'In the Imperial Palace: ' . imperialPalaceEvent($config);
    } elseif ($roll <= 5) {
        $event = 'Relative Unrest: ' . relativeUnrestEvent($config);
    } else {
        $_SESSION['scores']['flames']++;
        $event = 'The fires spread. +1 Flames.';
    }

    return $event;
}

/**
 * Handles events occurring in the Imperial Palace based on a dice roll.
 *
 * @param array $config The game configuration.
 *
 * @return string The event description.
 */
function imperialPalaceEvent($config) {
    $roll = rand(1, 6);
    $event = '';

    switch ($roll) {
    case 1:
        $_SESSION['scores']['flames']++;
        $event = $config['imperial_palace_event_1'];
        break;
    case 2:
        $_SESSION['scores']['desolation']++;
        $_SESSION['scores']['relocation']++;
        $event = $config['imperial_palace_event_2'];
        break;
    case 3:
        $_SESSION['scores']['relocation']++;
        $event = $config['imperial_palace_event_3'];
        break;
    case 4:
        $_SESSION['scores']['desolation']++;
        $event = $config['imperial_palace_event_4'];
        break;
    case 5:
        $_SESSION['scores']['flames']++;
        $_SESSION['scores']['relocation']++;
        $event = $config['imperial_palace_event_5'];
        break;
    case 6:
        $_SESSION['scores']['flames']++;
        $event = $config['imperial_palace_event_6'];
        break;
    }

    return $event;
}

/**
 * Handles events related to relative unrest based on a dice roll.
 *
 * @param array $config The game configuration.
 *
 * @return string The event description.
 */
function relativeUnrestEvent($config) {
    $roll = rand(1, 6);
    $event = '';

    switch ($roll) {
    case 1:
        $_SESSION['scores']['relocation']++;
        $event = $config['relative_unrest_event_1'];
        break;
    case 2:
        $_SESSION['scores']['desolation']++;
        $event = $config['relative_unrest_event_2'];
        break;
    case 3:
        $_SESSION['scores']['relocation']++;
        $event = $config['relative_unrest_event_3'];
        break;
    case 4:
        $_SESSION['scores']['desolation']++;
        $_SESSION['scores']['flames']++;
        $event = $config['relative_unrest_event_4'];
        break;
    case 5:
        $_SESSION['scores']['desolation']++;
        $event = $config['relative_unrest_event_5'];
        break;
    case 6:
        $_SESSION['scores']['flames']++;
        $event = $config['relative_unrest_event_6'];
        break;
    }

    return $event;
}

/**
 * Attempts to assassinate the emperor based on the current desolation score.
 *
 * @param array $config The game configuration.
 *
 * @return array An array containing the event description and game state.
 */
function assassinate($config) {
    $desolation = $_SESSION['scores']['desolation'];
    $total = 0;

    for ($i = 0; $i < $desolation; $i++) {
        $total += rand(1, 6);
    }

    if ($total >= $config['assassination_win']) {
        return [
            'event' => 'You have assassinated the emperor! You die a martyr.',
            'gameState' => 'win_assassination'
        ];
    } else {
        return [
            'event' => 'Your attempt to assassinate the emperor has failed. You are executed.',
            'gameState' => 'loss_assassination'
        ];
    }
}

/**
 * Checks the current game state based on scores and configuration.
 *
 * @param array $config The game configuration.
 *
 * @return string The current game state.
 */
function checkGameState($config) {
    if ($_SESSION['scores']['flames'] >= $config['flames_win']) {
        return 'loss_flames';
    }

    if ($_SESSION['scores']['desolation'] >= $config['desolation_win']) {
        return 'loss_desolation';
    }

    if ($_SESSION['scores']['relocation'] >= $config['relocation_win']) {
        return 'win';
    }

    return 'ongoing';
}

/**
 * Logs the end of a game with scores and end condition.
 *
 * @param string $endCondition The condition that ended the game.
 *
 * @return void
 */
function logGame($endCondition) {
    global $db;

    $stmt = $db->prepare(
        'INSERT INTO game_logs (
        date_played,
        flames_score,
        desolation_score,
        relocation_score,
        end_condition)
        VALUES (?, ?, ?, ?, ?)'
    );

    $stmt->execute(
        [
            date('Y-m-d H:i:s'),
            $_SESSION['scores']['flames'],
            $_SESSION['scores']['desolation'],
            $_SESSION['scores']['relocation'],
            $endCondition
        ]
    );
}