<?php
session_start();

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

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

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

function roll_dice() {
    $roll = rand(1, 6);
    $event = '';

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

function imperial_palace_event() {
    $roll = rand(1, 6);
    $event = '';
    switch ($roll) {
        case 1:
            $_SESSION['scores']['flames']++;
            $event = 'The emperor fiddles with manic glee. +1 Flames.';
            break;
        case 2:
            $_SESSION['scores']['desolation']++;
            $_SESSION['scores']['relocation']++;
            $event = 'The emperor raises another horse to the position of senator. +1 Desolation, +1 Relocation.';
            break;
        case 3:
            $_SESSION['scores']['relocation']++;
            $event = 'It\'s execution night at the palace. +1 Relocation.';
            break;
        case 4:
            $_SESSION['scores']['desolation']++;
            $event = 'The emperor screams like a baby. +1 Desolation.';
            break;
        case 5:
            $_SESSION['scores']['flames']++;
            $_SESSION['scores']['relocation']++;
            $event = 'The emperor sits in front of the flame and commands it to obey. It does not. +1 Flames, +1 Relocation.';
            break;
        case 6:
            $_SESSION['scores']['flames']++;
            $event = 'Work continues on a house made of pure gold. It keeps melting. +1 Flames.';
            break;
    }
    return $event;
}

function relative_unrest_event() {
    $roll = rand(1, 6);
    $event = '';
    switch ($roll) {
        case 1:
            $_SESSION['scores']['relocation']++;
            $event = 'People complain - this is unacceptable. Then they go about their business. +1 Relocation.';
            break;
        case 2:
            $_SESSION['scores']['desolation']++;
            $event = 'There are no goods at market. +1 Desolation.';
            break;
        case 3:
            $_SESSION['scores']['relocation']++;
            $event = 'You receive a letter asking you to reassert your faith in the emperor. In writing. +1 Relocation.';
            break;
        case 4:
            $_SESSION['scores']['desolation']++;
            $_SESSION['scores']['flames']++;
            $event = 'Lions are released onto the streets. +1 Desolation, +1 Flames.';
            break;
        case 5:
            $_SESSION['scores']['desolation']++;
            $event = 'Is Rome really over? +1 Desolation.';
            break;
        case 6:
            $_SESSION['scores']['flames']++;
            $event = 'The burnings will continue until morale improves. +1 Flames.';
            break;
    }
    return $event;
}

function assassinate() {
    $desolation = $_SESSION['scores']['desolation'];
    $total = 0;
    for ($i = 0; $i < $desolation; $i++) {
        $total += rand(1, 6);
    }

    if ($total >= 20) {
        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'];
    }
}

function check_game_state() {
    if ($_SESSION['scores']['flames'] >= 10) {
        return 'loss_flames';
    }
    if ($_SESSION['scores']['desolation'] >= 10) {
        return 'loss_desolation';
    }
    if ($_SESSION['scores']['relocation'] >= 10) {
        return 'win';
    }
    return 'ongoing';
}