<?php
declare(strict_types=1);
@ini_set('display_errors', '1');
@error_reporting(E_ALL);
@date_default_timezone_set('UTC');

session_start();
require_once __DIR__ . '/../includes/rooms.php';

header('Content-Type: application/json');

ensure_rooms_schema();

$input = $_POST;
$roomId = (int) ($input['room_id'] ?? 0);
$action = $input['action'] ?? '';

if ($roomId <= 0 || $action === '') {
    echo json_encode(['success' => false, 'error' => 'Invalid request']);
    exit;
}

$room = get_room($roomId);
if (!$room) {
    echo json_encode(['success' => false, 'error' => 'Room not found']);
    exit;
}

$sessionPlayer = get_session_player($roomId);
if (!$sessionPlayer) {
    echo json_encode(['success' => false, 'error' => 'Player not in room']);
    exit;
}

$state = $room['state'];
$players = $state['players'] ?? [];
$playerIndex = null;
foreach ($players as $index => $player) {
    if ($player['token'] === $sessionPlayer['token']) {
        $playerIndex = $index;
        break;
    }
}

if ($playerIndex === null) {
    echo json_encode(['success' => false, 'error' => 'Player not found']);
    exit;
}

if ($action === 'start') {
    if (!empty($players[$playerIndex]['is_host']) && $room['status'] === 'waiting') {
        $room['status'] = 'playing';
        $state['started_at'] = now_ms();
        $room['state'] = $state;
        $room = update_room_tick($room);
        save_room_state($roomId, $room['state'], $room['status']);
        echo json_encode([
            'success' => true,
            'status' => 'playing',
            'room' => [
                'id' => $room['id'],
                'name' => $room['name'],
                'status' => $room['status'],
                'max_players' => (int) $room['max_players']
            ],
            'state' => $room['state'],
            'server_time' => now_ms()
        ]);
        exit;
    }
    echo json_encode(['success' => false, 'error' => 'Not allowed']);
    exit;
}

if ($room['status'] !== 'playing') {
    echo json_encode(['success' => false, 'error' => 'Match not active']);
    exit;
}

if ($action === 'move') {
    $dir = $input['dir'] ?? '';
    $moves = [
        'up' => [0, -1],
        'down' => [0, 1],
        'left' => [-1, 0],
        'right' => [1, 0],
    ];
    if (!isset($moves[$dir])) {
        echo json_encode(['success' => false, 'error' => 'Invalid direction']);
        exit;
    }
    $player = $players[$playerIndex];
    if (!$player['alive']) {
        echo json_encode(['success' => false, 'error' => 'Player eliminated']);
        exit;
    }
    $nx = $player['x'] + $moves[$dir][0];
    $ny = $player['y'] + $moves[$dir][1];
    $tile = $state['map']['tiles'][$ny][$nx] ?? 1;
    $bombs = $state['bombs'] ?? [];
    $bombBlocked = false;
    foreach ($bombs as $bomb) {
        if ($bomb['x'] === $nx && $bomb['y'] === $ny) {
            $bombBlocked = true;
            break;
        }
    }
    if ($tile === 0 && !$bombBlocked) {
        $player['x'] = $nx;
        $player['y'] = $ny;
        if (!empty($state['powerups'])) {
            foreach ($state['powerups'] as $idx => $powerup) {
                if ($powerup['x'] === $nx && $powerup['y'] === $ny) {
                    apply_powerup($player, $powerup['type']);
                    unset($state['powerups'][$idx]);
                }
            }
            $state['powerups'] = array_values($state['powerups']);
        }
        $players[$playerIndex] = $player;
    }
}

if ($action === 'bomb') {
    $player = $players[$playerIndex];
    if (!$player['alive']) {
        echo json_encode(['success' => false, 'error' => 'Player eliminated']);
        exit;
    }
    $bombs = $state['bombs'] ?? [];
    $owned = array_filter($bombs, fn($b) => $b['owner'] === $player['token']);
    $hasBomb = false;
    foreach ($bombs as $bomb) {
        if ($bomb['x'] === $player['x'] && $bomb['y'] === $player['y']) {
            $hasBomb = true;
            break;
        }
    }
    if (count($owned) < $player['bombs'] && !$hasBomb) {
        $bombs[] = [
            'x' => $player['x'],
            'y' => $player['y'],
            'owner' => $player['token'],
            'placed_at' => now_ms(),
            'blast' => $player['blast']
        ];
        $state['bombs'] = $bombs;
    }
}

$state['players'] = $players;
$room['state'] = $state;
$room = update_room_tick($room);
save_room_state($roomId, $room['state'], $room['status']);

echo json_encode([
    'success' => true,
    'room' => [
        'id' => $room['id'],
        'name' => $room['name'],
        'status' => $room['status'],
        'max_players' => (int) $room['max_players']
    ],
    'state' => $room['state'],
    'server_time' => now_ms()
]);