<?php

use App\Actions\CoolifyTask\PrepareCoolifyTask;
use App\Data\CoolifyTaskArgs;
use App\Enums\ActivityTypes;
use App\Helpers\SshMultiplexingHelper;
use App\Models\Application;
use App\Models\ApplicationDeploymentQueue;
use App\Models\PrivateKey;
use App\Models\Server;
use Carbon\Carbon;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Process;
use Illuminate\Support\Str;
use Spatie\Activitylog\Contracts\Activity;

function remote_process(
    Collection|array $command,
    Server $server,
    ?string $type = null,
    ?string $type_uuid = null,
    ?Model $model = null,
    bool $ignore_errors = false,
    $callEventOnFinish = null,
    $callEventData = null
): Activity {
    $type = $type ?? ActivityTypes::INLINE->value;
    $command = $command instanceof Collection ? $command->toArray() : $command;

    // Process commands and handle file transfers
    $processed_commands = [];
    foreach ($command as $cmd) {
        if (is_array($cmd) && isset($cmd['transfer_file'])) {
            // Handle file transfer command
            $transfer_data = $cmd['transfer_file'];
            $content = $transfer_data['content'];
            $destination = $transfer_data['destination'];

            // Execute file transfer immediately
            transfer_file_to_server($content, $destination, $server, ! $ignore_errors);

            // Add a comment to the command log for visibility
            $processed_commands[] = "# File transferred via SCP: $destination";
        } else {
            // Regular string command
            $processed_commands[] = $cmd;
        }
    }

    if ($server->isNonRoot()) {
        $processed_commands = parseCommandsByLineForSudo(collect($processed_commands), $server);
    }

    $command_string = implode("\n", $processed_commands);

    if (Auth::check()) {
        $teams = Auth::user()->teams->pluck('id');
        if (! $teams->contains($server->team_id) && ! $teams->contains(0)) {
            throw new \Exception('User is not part of the team that owns this server');
        }
    }

    SshMultiplexingHelper::ensureMultiplexedConnection($server);

    return resolve(PrepareCoolifyTask::class, [
        'remoteProcessArgs' => new CoolifyTaskArgs(
            server_uuid: $server->uuid,
            command: $command_string,
            type: $type,
            type_uuid: $type_uuid,
            model: $model,
            ignore_errors: $ignore_errors,
            call_event_on_finish: $callEventOnFinish,
            call_event_data: $callEventData,
        ),
    ])();
}

function instant_scp(string $source, string $dest, Server $server, $throwError = true)
{
    return \App\Helpers\SshRetryHandler::retry(
        function () use ($source, $dest, $server) {
            $scp_command = SshMultiplexingHelper::generateScpCommand($server, $source, $dest);
            $process = Process::timeout(config('constants.ssh.command_timeout'))->run($scp_command);

            $output = trim($process->output());
            $exitCode = $process->exitCode();

            if ($exitCode !== 0) {
                excludeCertainErrors($process->errorOutput(), $exitCode);
            }

            return $output === 'null' ? null : $output;
        },
        [
            'server' => $server->ip,
            'source' => $source,
            'dest' => $dest,
            'function' => 'instant_scp',
        ],
        $throwError
    );
}

function transfer_file_to_container(string $content, string $container_path, string $deployment_uuid, Server $server, bool $throwError = true): ?string
{
    $temp_file = tempnam(sys_get_temp_dir(), 'coolify_env_');

    try {
        // Write content to temporary file
        file_put_contents($temp_file, $content);

        // Generate unique filename for server transfer
        $server_temp_file = '/tmp/coolify_env_'.uniqid().'_'.$deployment_uuid;

        // Transfer file to server
        instant_scp($temp_file, $server_temp_file, $server, $throwError);

        // Ensure parent directory exists in container, then copy file
        $parent_dir = dirname($container_path);
        $commands = [];
        if ($parent_dir !== '.' && $parent_dir !== '/') {
            $commands[] = executeInDocker($deployment_uuid, "mkdir -p \"$parent_dir\"");
        }
        $commands[] = "docker cp $server_temp_file $deployment_uuid:$container_path";
        $commands[] = "rm -f $server_temp_file";  // Cleanup server temp file

        return instant_remote_process_with_timeout($commands, $server, $throwError);

    } finally {
        // Always cleanup local temp file
        if (file_exists($temp_file)) {
            unlink($temp_file);
        }
    }
}

function transfer_file_to_server(string $content, string $server_path, Server $server, bool $throwError = true): ?string
{
    $temp_file = tempnam(sys_get_temp_dir(), 'coolify_env_');

    try {
        // Write content to temporary file
        file_put_contents($temp_file, $content);

        // Ensure parent directory exists on server
        $parent_dir = dirname($server_path);
        if ($parent_dir !== '.' && $parent_dir !== '/') {
            instant_remote_process_with_timeout(["mkdir -p \"$parent_dir\""], $server, $throwError);
        }

        // Transfer file directly to server destination
        return instant_scp($temp_file, $server_path, $server, $throwError);

    } finally {
        // Always cleanup local temp file
        if (file_exists($temp_file)) {
            unlink($temp_file);
        }
    }
}

function instant_remote_process_with_timeout(Collection|array $command, Server $server, bool $throwError = true, bool $no_sudo = false): ?string
{
    $command = $command instanceof Collection ? $command->toArray() : $command;
    if ($server->isNonRoot() && ! $no_sudo) {
        $command = parseCommandsByLineForSudo(collect($command), $server);
    }
    $command_string = implode("\n", $command);

    return \App\Helpers\SshRetryHandler::retry(
        function () use ($server, $command_string) {
            $sshCommand = SshMultiplexingHelper::generateSshCommand($server, $command_string);
            $process = Process::timeout(30)->run($sshCommand);

            $output = trim($process->output());
            $exitCode = $process->exitCode();

            if ($exitCode !== 0) {
                excludeCertainErrors($process->errorOutput(), $exitCode);
            }

            // Sanitize output to ensure valid UTF-8 encoding
            $output = $output === 'null' ? null : sanitize_utf8_text($output);

            return $output;
        },
        [
            'server' => $server->ip,
            'command_preview' => substr($command_string, 0, 100),
            'function' => 'instant_remote_process_with_timeout',
        ],
        $throwError
    );
}

function instant_remote_process(Collection|array $command, Server $server, bool $throwError = true, bool $no_sudo = false): ?string
{
    $command = $command instanceof Collection ? $command->toArray() : $command;

    // Process commands and handle file transfers
    $processed_commands = [];
    foreach ($command as $cmd) {
        if (is_array($cmd) && isset($cmd['transfer_file'])) {
            // Handle file transfer command
            $transfer_data = $cmd['transfer_file'];
            $content = $transfer_data['content'];
            $destination = $transfer_data['destination'];

            // Execute file transfer immediately
            transfer_file_to_server($content, $destination, $server, $throwError);

            // Add a comment to the command log for visibility
            $processed_commands[] = "# File transferred via SCP: $destination";
        } else {
            // Regular string command
            $processed_commands[] = $cmd;
        }
    }

    if ($server->isNonRoot() && ! $no_sudo) {
        $processed_commands = parseCommandsByLineForSudo(collect($processed_commands), $server);
    }
    $command_string = implode("\n", $processed_commands);

    return \App\Helpers\SshRetryHandler::retry(
        function () use ($server, $command_string) {
            $sshCommand = SshMultiplexingHelper::generateSshCommand($server, $command_string);
            $process = Process::timeout(config('constants.ssh.command_timeout'))->run($sshCommand);

            $output = trim($process->output());
            $exitCode = $process->exitCode();

            if ($exitCode !== 0) {
                excludeCertainErrors($process->errorOutput(), $exitCode);
            }

            // Sanitize output to ensure valid UTF-8 encoding
            $output = $output === 'null' ? null : sanitize_utf8_text($output);

            return $output;
        },
        [
            'server' => $server->ip,
            'command_preview' => substr($command_string, 0, 100),
            'function' => 'instant_remote_process',
        ],
        $throwError
    );
}

function excludeCertainErrors(string $errorOutput, ?int $exitCode = null)
{
    $ignoredErrors = collect([
        'Permission denied (publickey',
        'Could not resolve hostname',
    ]);
    $ignored = $ignoredErrors->contains(fn ($error) => Str::contains($errorOutput, $error));

    // Ensure we always have a meaningful error message
    $errorMessage = trim($errorOutput);
    if (empty($errorMessage)) {
        $errorMessage = "SSH command failed with exit code: $exitCode";
    }

    if ($ignored) {
        // TODO: Create new exception and disable in sentry
        throw new \RuntimeException($errorMessage, $exitCode);
    }
    throw new \RuntimeException($errorMessage, $exitCode);
}

function decode_remote_command_output(?ApplicationDeploymentQueue $application_deployment_queue = null): Collection
{
    if (is_null($application_deployment_queue)) {
        return collect([]);
    }
    $application = Application::find(data_get($application_deployment_queue, 'application_id'));
    $is_debug_enabled = data_get($application, 'settings.is_debug_enabled');

    $logs = data_get($application_deployment_queue, 'logs');
    if (empty($logs)) {
        return collect([]);
    }

    try {
        $decoded = json_decode(
            $logs,
            associative: true,
            flags: JSON_THROW_ON_ERROR
        );
    } catch (\JsonException $e) {
        // If JSON decoding fails, try to clean up the logs and retry
        try {
            // Ensure valid UTF-8 encoding
            $cleaned_logs = sanitize_utf8_text($logs);
            $decoded = json_decode(
                $cleaned_logs,
                associative: true,
                flags: JSON_THROW_ON_ERROR
            );
        } catch (\JsonException $e) {
            // If it still fails, return empty collection to prevent crashes
            return collect([]);
        }
    }

    if (! is_array($decoded)) {
        return collect([]);
    }

    $seenCommands = collect();
    $formatted = collect($decoded);
    if (! $is_debug_enabled) {
        $formatted = $formatted->filter(fn ($i) => $i['hidden'] === false ?? false);
    }

    return $formatted
        ->sortBy(fn ($i) => data_get($i, 'order'))
        ->map(function ($i) {
            data_set($i, 'timestamp', Carbon::parse(data_get($i, 'timestamp'))->format('Y-M-d H:i:s.u'));

            return $i;
        })
        ->reduce(function ($deploymentLogLines, $logItem) use ($seenCommands) {
            $command = data_get($logItem, 'command');
            $isStderr = data_get($logItem, 'type') === 'stderr';
            $isNewCommand = ! is_null($command) && ! $seenCommands->first(function ($seenCommand) use ($logItem) {
                return data_get($seenCommand, 'command') === data_get($logItem, 'command') && data_get($seenCommand, 'batch') === data_get($logItem, 'batch');
            });

            if ($isNewCommand) {
                $deploymentLogLines->push([
                    'line' => $command,
                    'timestamp' => data_get($logItem, 'timestamp'),
                    'stderr' => $isStderr,
                    'hidden' => data_get($logItem, 'hidden'),
                    'command' => true,
                ]);

                $seenCommands->push([
                    'command' => $command,
                    'batch' => data_get($logItem, 'batch'),
                ]);
            }

            $lines = explode(PHP_EOL, data_get($logItem, 'output'));

            foreach ($lines as $line) {
                $deploymentLogLines->push([
                    'line' => $line,
                    'timestamp' => data_get($logItem, 'timestamp'),
                    'stderr' => $isStderr,
                    'hidden' => data_get($logItem, 'hidden'),
                ]);
            }

            return $deploymentLogLines;
        }, collect());
}

function remove_iip($text)
{
    // Ensure the input is valid UTF-8 before processing
    $text = sanitize_utf8_text($text);

    $text = preg_replace('/x-access-token:.*?(?=@)/', 'x-access-token:'.REDACTED, $text);

    return preg_replace('/\x1b\[[0-9;]*m/', '', $text);
}

/**
 * Sanitizes text to ensure it contains valid UTF-8 encoding.
 *
 * This function is crucial for preventing "Malformed UTF-8 characters" errors
 * that can occur when Docker build output contains binary data mixed with text,
 * especially during image processing or builds with many assets.
 *
 * @param  string|null  $text  The text to sanitize
 * @return string Valid UTF-8 encoded text
 */
function sanitize_utf8_text(?string $text): string
{
    if (empty($text)) {
        return '';
    }

    // Convert to UTF-8, replacing invalid sequences
    $sanitized = mb_convert_encoding($text, 'UTF-8', 'UTF-8');

    // Additional fallback: use SUBSTITUTE flag to replace invalid sequences with substitution character
    if (! mb_check_encoding($sanitized, 'UTF-8')) {
        $sanitized = mb_convert_encoding($text, 'UTF-8', mb_detect_encoding($text, mb_detect_order(), true) ?: 'UTF-8');
    }

    return $sanitized;
}

function refresh_server_connection(?PrivateKey $private_key = null)
{
    if (is_null($private_key)) {
        return;
    }
    foreach ($private_key->servers as $server) {
        SshMultiplexingHelper::removeMuxFile($server);
    }
}

function checkRequiredCommands(Server $server)
{
    $commands = collect(['jq', 'jc']);
    foreach ($commands as $command) {
        $commandFound = instant_remote_process(["docker run --rm --privileged --net=host --pid=host --ipc=host --volume /:/host busybox chroot /host bash -c 'command -v {$command}'"], $server, false);
        if ($commandFound) {
            continue;
        }
        try {
            instant_remote_process(["docker run --rm --privileged --net=host --pid=host --ipc=host --volume /:/host busybox chroot /host bash -c 'apt update && apt install -y {$command}'"], $server);
        } catch (\Throwable) {
            break;
        }
        $commandFound = instant_remote_process(["docker run --rm --privileged --net=host --pid=host --ipc=host --volume /:/host busybox chroot /host bash -c 'command -v {$command}'"], $server, false);
        if (! $commandFound) {
            break;
        }
    }
}