<?php

declare(strict_types=1);

require_once dirname(__DIR__, 3) . '/src/App/bootstrap.php';

use App\ConfigLoader;
use App\KeycloakAuth;
use MiningChecker\MiningCheckerCalculator;
use MiningChecker\MiningCheckerStore;
use MiningChecker\MiningCheckerUserScope;

session_start();

$projectRoot = dirname(__DIR__, 3);
$keycloakConfig = ConfigLoader::load($projectRoot, 'keycloak');
$auth = new KeycloakAuth($keycloakConfig);

header('Content-Type: application/json; charset=utf-8');

if (!$auth->shouldShowDesktop()) {
    http_response_code(401);
    echo json_encode(['error' => 'Nicht autorisiert.'], JSON_UNESCAPED_UNICODE);
    exit;
}

$store = new MiningCheckerStore($projectRoot, MiningCheckerUserScope::current());
$calculator = new MiningCheckerCalculator();
$method = $_SERVER['REQUEST_METHOD'] ?? 'GET';

try {
    if ($method === 'GET') {
        $state = $store->load();
        $state['metrics'] = $calculator->calculate((array) ($state['settings'] ?? []));
        echo json_encode($state, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        exit;
    }

    $payloadRaw = file_get_contents('php://input');
    $payload = json_decode($payloadRaw !== false ? $payloadRaw : '', true);
    $payload = is_array($payload) ? $payload : [];

    if ($method === 'PUT') {
        $state = $store->load();
        $state['settings'] = normalizeSettings(array_merge((array) ($state['settings'] ?? []), $payload));
        $store->save($state);
        $state['metrics'] = $calculator->calculate((array) $state['settings']);
        echo json_encode($state, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        exit;
    }

    if ($method === 'POST') {
        $state = $store->load();
        $settings = normalizeSettings(array_merge((array) ($state['settings'] ?? []), is_array($payload['settings'] ?? null) ? $payload['settings'] : []));
        $metrics = $calculator->calculate($settings);
        $note = trim((string) ($payload['note'] ?? ''));
        $history = is_array($state['history'] ?? null) ? $state['history'] : [];

        array_unshift($history, [
            'id' => bin2hex(random_bytes(8)),
            'created_at' => gmdate('c'),
            'project_name' => (string) ($settings['project_name'] ?? ''),
            'coin_symbol' => (string) ($settings['coin_symbol'] ?? ''),
            'currency' => (string) ($settings['currency'] ?? 'EUR'),
            'note' => $note,
            'settings' => $settings,
            'metrics' => $metrics,
        ]);

        $state['settings'] = $settings;
        $state['history'] = array_slice($history, 0, 25);
        $store->save($state);

        $state['metrics'] = $metrics;
        echo json_encode($state, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        exit;
    }

    http_response_code(405);
    echo json_encode(['error' => 'Methode nicht erlaubt.'], JSON_UNESCAPED_UNICODE);
} catch (Throwable $throwable) {
    http_response_code(500);
    echo json_encode(['error' => $throwable->getMessage()], JSON_UNESCAPED_UNICODE);
}

/**
 * @param array<string, mixed> $settings
 * @return array<string, mixed>
 */
function normalizeSettings(array $settings): array
{
    return [
        'project_name' => trim((string) ($settings['project_name'] ?? 'DOGE Mining')),
        'coin_symbol' => strtoupper(trim((string) ($settings['coin_symbol'] ?? 'DOGE'))),
        'algorithm' => trim((string) ($settings['algorithm'] ?? 'Scrypt')),
        'currency' => strtoupper(trim((string) ($settings['currency'] ?? 'EUR'))),
        'hashrate' => (float) ($settings['hashrate'] ?? 0),
        'hashrate_unit' => trim((string) ($settings['hashrate_unit'] ?? 'MH/s')),
        'network_hashrate' => (float) ($settings['network_hashrate'] ?? 0),
        'network_hashrate_unit' => trim((string) ($settings['network_hashrate_unit'] ?? 'TH/s')),
        'block_reward' => (float) ($settings['block_reward'] ?? 0),
        'block_time_seconds' => (float) ($settings['block_time_seconds'] ?? 60),
        'coin_price' => (float) ($settings['coin_price'] ?? 0),
        'power_watts' => (float) ($settings['power_watts'] ?? 0),
        'electricity_price' => (float) ($settings['electricity_price'] ?? 0),
        'pool_fee_percent' => (float) ($settings['pool_fee_percent'] ?? 0),
        'hardware_cost' => (float) ($settings['hardware_cost'] ?? 0),
        'notes' => trim((string) ($settings['notes'] ?? '')),
    ];
}