<?php

namespace App\Network\Clients\Hisfocus;

use Illuminate\Http\Client\PendingRequest;
use Illuminate\Support\Facades\Http;
use RuntimeException;

class HisfocusWebClient
{
    public function __construct(private readonly string $host, private readonly int $port = 80, private readonly int $timeout = 10) {}

    /** @return array<string, string> */
    public function users(string $loginUsername, string $loginPassword): array
    {
        $match = null;
        for ($attempt = 1; $attempt <= 3; $attempt++) {
            $body = $this->request($loginUsername, $loginPassword)->get($this->url('/userOverview.asp'))->body();
            if (preg_match('/var\s+userList\s*=\s*new\s+Array\((.*?)\);/s', $body, $found)) {
                $match = $found;
                break;
            }
            if ($attempt < 3) {
                usleep(250_000);
            }
        }
        if (! $match) {
            throw new RuntimeException('HISFOCUS_WEB_PARSE_FAILED: daftar user WebGUI tidak dikenali setelah tiga percobaan.');
        }
        preg_match_all('/"([^"]*)"/', $match[1], $values);
        $users = [];
        foreach (array_chunk($values[1], 2) as $user) {
            if (count($user) === 2) {
                $users[$user[0]] = $user[1];
            }
        }

        return $users;
    }

    public function addUser(string $loginUsername, string $loginPassword, string $username, string $password, string $group): void
    {
        $response = $this->request($loginUsername, $loginPassword)->asForm()->post($this->url('/goform/setAddUser'), [
            'addUserHiddenId' => 0,
            'UserName' => $username,
            'UserGroup' => $group,
            'UserPassword' => $password,
            'ComfirmPassword' => $password,
        ]);
        $this->assertAccepted($response->status(), $response->body());
        $this->assertUserState($loginUsername, $loginPassword, $username, $group);
    }

    public function changePassword(string $loginUsername, string $loginPassword, string $username, string $oldPassword, string $newPassword): void
    {
        $response = $this->request($loginUsername, $loginPassword)->asForm()->post($this->url('/goform/setUserPassword'), [
            'HiddenUserName' => $username,
            'LYS' => $oldPassword,
            'PBT' => $newPassword,
        ]);
        $this->assertAccepted($response->status(), $response->body());
    }

    public function deleteUser(string $loginUsername, string $loginPassword, string $username): void
    {
        $response = $this->request($loginUsername, $loginPassword)->asForm()->post($this->url('/goform/setDeleteUser'), [
            'user'.$username.'DeleteCheck' => 'on',
        ]);
        $this->assertAccepted($response->status(), $response->body());
        $this->assertUserState($loginUsername, $loginPassword, $username, null);
    }

    public function canLogin(string $username, string $password): bool
    {
        return $this->request($username, $password)->get($this->url('/'))->successful();
    }

    private function request(string $username, string $password): PendingRequest
    {
        return Http::withBasicAuth($username, $password)->timeout($this->timeout)->connectTimeout($this->timeout);
    }

    private function assertAccepted(int $status, string $body): void
    {
        if ($status >= 400 || stripos($body, 'Access Denied') !== false) {
            throw new RuntimeException('HISFOCUS_WEB_REJECTED: WebGUI menolak operasi user.');
        }
    }

    private function assertUserState(string $loginUsername, string $loginPassword, string $username, ?string $expectedGroup): void
    {
        for ($attempt = 1; $attempt <= 4; $attempt++) {
            $users = $this->users($loginUsername, $loginPassword);
            $exists = array_key_exists($username, $users);
            if ($expectedGroup === null ? ! $exists : ($exists && strcasecmp($users[$username], $expectedGroup) === 0)) {
                return;
            }
            if ($attempt < 4) {
                usleep(250_000);
            }
        }

        throw new RuntimeException($expectedGroup === null
            ? 'HISFOCUS_WEB_DELETE_FAILED: user masih tercatat di WebGUI.'
            : 'HISFOCUS_WEB_ADD_FAILED: user atau role belum tercatat di WebGUI.');
    }

    private function url(string $path): string
    {
        return "http://{$this->host}:{$this->port}{$path}";
    }
}