<?php

namespace App\Actions\Database;

use App\Actions\Shared\EnsureContentFilesOnServer;
use App\Models\StandaloneClickhouse;
use App\Traits\ExecutesDatabaseStartCommands;
use Lorisleiva\Actions\Concerns\AsAction;
use Spatie\Activitylog\Models\Activity;
use Symfony\Component\Yaml\Yaml;

class StartClickhouse
{
    use AsAction, ExecutesDatabaseStartCommands;

    public StandaloneClickhouse $database;

    public array $commands = [];

    public string $configuration_dir;

    private string $resolvedClickhouseUser;

    private string $resolvedClickhousePassword;

    public function handle(StandaloneClickhouse $database, ?Activity $activity = null)
    {
        $this->database = $database;

        $container_name = $this->database->uuid;
        $this->configuration_dir = database_configuration_dir().'/'.$container_name;

        $this->commands = [
            "echo 'Starting database.'",
            "mkdir -p $this->configuration_dir",
        ];

        $persistent_storages = $this->generate_local_persistent_volumes();
        $persistent_file_volumes = $this->database->fileStorages()->get();
        array_push($this->commands, ...EnsureContentFilesOnServer::echoCommands($persistent_file_volumes, $this->database->destination->server));
        $volume_names = $this->generate_local_persistent_volumes_only_volume_names();
        $environment_variables = $this->generate_environment_variables();

        $docker_compose = [
            'services' => [
                $container_name => [
                    'image' => $this->database->image,
                    'container_name' => $container_name,
                    'environment' => $environment_variables,
                    'restart' => RESTART_MODE,
                    'networks' => [
                        $this->database->destination->network,
                    ],
                    'ulimits' => [
                        'nofile' => [
                            'soft' => 262144,
                            'hard' => 262144,
                        ],
                    ],
                    'labels' => defaultDatabaseLabels($this->database)->toArray(),
                    'healthcheck' => $this->database->healthCheckConfiguration([
                        'CMD', 'clickhouse-client', '--user', $this->resolvedClickhouseUser, '--password', $this->resolvedClickhousePassword, '--query', 'SELECT 1',
                    ]),
                    'mem_limit' => $this->database->limits_memory,
                    'memswap_limit' => $this->database->limits_memory_swap,
                    'mem_swappiness' => $this->database->limits_memory_swappiness,
                    'mem_reservation' => $this->database->limits_memory_reservation,
                    'cpus' => (float) $this->database->limits_cpus,
                    'cpu_shares' => $this->database->limits_cpu_shares,
                ],
            ],
            'networks' => [
                $this->database->destination->network => [
                    'external' => true,
                    'name' => $this->database->destination->network,
                    'attachable' => true,
                ],
            ],
        ];
        if (! is_null($this->database->limits_cpuset)) {
            data_set($docker_compose, "services.{$container_name}.cpuset", $this->database->limits_cpuset);
        }
        if ($this->database->destination->server->isLogDrainEnabled() && $this->database->isLogDrainEnabled()) {
            $docker_compose['services'][$container_name]['logging'] = generate_log_drain_configuration($this->database->destination->server);
        }
        if (count($this->database->ports_mappings_array) > 0) {
            $docker_compose['services'][$container_name]['ports'] = $this->database->ports_mappings_array;
        }

        $docker_compose['services'][$container_name]['volumes'] ??= [];

        if (count($persistent_storages) > 0) {
            $docker_compose['services'][$container_name]['volumes'] = array_merge(
                $docker_compose['services'][$container_name]['volumes'],
                $persistent_storages
            );
        }

        if (count($persistent_file_volumes) > 0) {
            $docker_compose['services'][$container_name]['volumes'] = array_merge(
                $docker_compose['services'][$container_name]['volumes'],
                $persistent_file_volumes->map(function ($item) {
                    return "$item->fs_path:$item->mount_path";
                })->toArray()
            );
        }
        if (count($volume_names) > 0) {
            $docker_compose['volumes'] = $volume_names;
        }

        // Add custom docker run options
        $docker_run_options = convertDockerRunToCompose($this->database->custom_docker_run_options);
        $docker_compose = generateCustomDockerRunOptionsForDatabases($docker_run_options, $docker_compose, $container_name, $this->database->destination->network);

        if (! $this->database->isHealthcheckEnabled()) {
            unset($docker_compose['services'][$container_name]['healthcheck']);
        }
        $docker_compose = Yaml::dump($docker_compose, 10);
        $docker_compose_base64 = base64_encode($docker_compose);
        $this->commands[] = "echo '{$docker_compose_base64}' | base64 -d | tee $this->configuration_dir/docker-compose.yml > /dev/null";
        $readme = generate_readme_file($this->database->name, now());
        $this->commands[] = "echo '{$readme}' | tee $this->configuration_dir/README.md > /dev/null";
        $this->commands[] = 'echo '.escapeshellarg("Pulling {$database->image} image.");
        $this->commands[] = serverDockerConfigPrefix($this->database->destination->server)."docker compose -f $this->configuration_dir/docker-compose.yml pull";
        $this->commands[] = dockerStopCommand(10, $container_name, $this->database->destination->server).' 2>/dev/null || true';
        $this->commands[] = "docker rm -f $container_name 2>/dev/null || true";
        $this->commands[] = "docker compose -f $this->configuration_dir/docker-compose.yml up -d";
        $this->commands[] = "echo 'Database started.'";

        return $this->executeDatabaseStartCommands($this->commands, $database, $activity);
    }

    private function generate_local_persistent_volumes()
    {
        $local_persistent_volumes = [];
        foreach ($this->database->persistentStorages as $persistentStorage) {
            if ($persistentStorage->host_path !== '' && $persistentStorage->host_path !== null) {
                $local_persistent_volumes[] = $persistentStorage->host_path.':'.$persistentStorage->mount_path;
            } else {
                $volume_name = $persistentStorage->name;
                $local_persistent_volumes[] = $volume_name.':'.$persistentStorage->mount_path;
            }
        }

        return $local_persistent_volumes;
    }

    private function generate_local_persistent_volumes_only_volume_names()
    {
        $local_persistent_volumes_names = [];
        foreach ($this->database->persistentStorages as $persistentStorage) {
            if ($persistentStorage->host_path) {
                continue;
            }
            $name = $persistentStorage->name;
            $local_persistent_volumes_names[$name] = [
                'name' => $name,
                'external' => false,
            ];
        }

        return $local_persistent_volumes_names;
    }

    private function generate_environment_variables()
    {
        $environment_variables = collect();
        $this->resolvedClickhouseUser = (string) $this->database->clickhouse_admin_user;
        $this->resolvedClickhousePassword = (string) $this->database->clickhouse_admin_password;
        foreach ($this->database->runtime_environment_variables as $env) {
            $rawValue = (string) $this->database->resolveSecretManagerEnvironmentVariableValue($env);
            $resolvedValue = (string) $this->database->formatEnvironmentVariableValue($env, $rawValue);
            // Credentials below are placed directly in the compose file (healthcheck, command).
            $composeFileValue = $this->database->formatComposeFileValue($env, $rawValue);
            $environment_variables->push($env->key.'='.$resolvedValue);
            if ($env->key === 'CLICKHOUSE_USER') {
                $this->resolvedClickhouseUser = $composeFileValue;
            } elseif ($env->key === 'CLICKHOUSE_PASSWORD') {
                $this->resolvedClickhousePassword = $composeFileValue;
            }
        }

        if (! $this->hasEnvironmentVariable($environment_variables, 'CLICKHOUSE_USER')) {
            $environment_variables->push("CLICKHOUSE_USER={$this->database->clickhouse_admin_user}");
        }

        if (! $this->hasEnvironmentVariable($environment_variables, 'CLICKHOUSE_PASSWORD')) {
            $environment_variables->push("CLICKHOUSE_PASSWORD={$this->database->clickhouse_admin_password}");
        }

        if (! $this->hasEnvironmentVariable($environment_variables, 'CLICKHOUSE_DB')) {
            $environment_variables->push("CLICKHOUSE_DB={$this->database->clickhouse_db}");
        }

        $this->addCoolifyEnvironmentVariables($environment_variables);

        return $environment_variables->all();
    }
}