<?php

namespace App\Drivers\Laravel;

use App\Actions\Environments\BuildMigrationScript;
use App\Data\Operations\Plan;
use App\Data\Operations\PlannedStep;
use App\Drivers\Concerns\RendersCompose;
use App\Drivers\Driver;
use App\Enums\SchedulerMode;
use App\Enums\ServiceType;
use App\Models\Service;

class LaravelRuntimeDriver extends Driver implements RendersCompose
{
    public function __construct(
        public ?string $containerName = null,
        public ?string $containerId = null,
        public ?Service $service = null,
    ) {
        //
    }

    public function getOperationPlan(string $operationHash): Plan
    {
        return new Plan(steps: [
            new PlannedStep(
                name: 'Render Laravel Compose file',
                script: "mkdir -p /home/keystone/services/{$this->service?->id}",
            ),
            new PlannedStep(
                name: 'Run migrations',
                script: $this->service
                    ? app(BuildMigrationScript::class)->execute($this->service)
                    : 'true',
            ),
            new PlannedStep(
                name: 'Start Laravel replica',
                script: "docker compose -f /home/keystone/services/{$this->service?->id}/compose.yml up -d",
            ),
        ]);
    }

    public function serviceType(): ServiceType
    {
        return ServiceType::LARAVEL;
    }

    public function versionTrack(): string
    {
        return 'php-8.4';
    }

    public function defaultImage(): string
    {
        return 'serversideup/php:8.4-frankenphp';
    }

    public function defaultPorts(): array
    {
        return [80];
    }

    public function firewallRules(): array
    {
        return [];
    }

    public function environmentSchema(): array
    {
        return [
            'APP_ENV' => 'string',
            'SERVER_NAME' => 'string',
        ];
    }

    public function resourceDefaults(): array
    {
        return [];
    }

    public function updateBehavior(): string
    {
        return 'stateless_gateway_cutover';
    }

    public function composeService(): array
    {
        $image = $this->service?->available_image_digest
            ?: $this->service?->current_image_digest
            ?: ($this->service?->config['image'] ?? $this->defaultImage());

        $service = [
            'image' => $image,
            'restart' => 'unless-stopped',
            'environment' => $this->environmentExports(),
        ];

        if ($command = $this->service?->config['command'] ?? null) {
            $service['command'] = $command;
        }

        if (! in_array('worker', $this->service?->process_roles ?? [], true)) {
            $service['healthcheck'] = [
                'test' => ['CMD-SHELL', 'curl -fsS http://localhost'.($this->service?->config['health_path'] ?? '/up').' || exit 1'],
                'interval' => '10s',
                'timeout' => '5s',
                'retries' => 5,
            ];
        }

        if ($this->service?->default_cpu_limit) {
            $service['cpus'] = (string) $this->service->default_cpu_limit;
        }

        if ($this->service?->default_memory_limit_mb) {
            $service['mem_limit'] = "{$this->service->default_memory_limit_mb}m";
            $service['memswap_limit'] = "{$this->service->default_memory_limit_mb}m";
        }

        return $service;
    }

    public function composeVolumes(): array
    {
        return [];
    }

    public function environmentExports(): array
    {
        $environment = $this->service?->environment?->variables()
            ->pluck('value', 'key')
            ->all() ?? [];

        $environment = [
            ...$environment,
            'APP_ENV' => $this->service?->environment?->name ?? 'production',
            'SERVER_NAME' => ':80',
        ];

        if ($this->shouldAutorunScheduler()) {
            $environment['AUTORUN_LARAVEL_SCHEDULER'] = 'true';
        }

        return $environment;
    }

    private function shouldAutorunScheduler(): bool
    {
        if (! in_array('scheduler', $this->service?->process_roles ?? [], true)) {
            return false;
        }

        $environment = $this->service?->environment;

        if (! $environment?->scheduler_enabled) {
            return false;
        }

        if ($environment->scheduler_target_service_id && $environment->scheduler_target_service_id !== $this->service?->id) {
            return false;
        }

        return $environment->scheduler_mode !== SchedulerMode::SINGLE
            || (int) $this->service?->desired_replicas === 1;
    }

    public function dockerfileTemplate(): string
    {
        $phpVersion = $this->service?->config['php_version'] ?? '8.4';
        $documentRoot = $this->service?->config['document_root'] ?? 'public';
        $jsBuildCommand = $this->service?->config['js_build_command'] ?? $this->service?->environment?->build_config['js_build_command'] ?? null;
        $jsPackageManager = $this->service?->config['js_package_manager'] ?? $this->service?->environment?->build_config['js_package_manager'] ?? 'bun';
        $jsBuildSteps = $this->jsBuildSteps($jsPackageManager, $jsBuildCommand);

        return <<<DOCKERFILE
FROM serversideup/php:{$phpVersion}-frankenphp

ENV SSL_MODE=off
ENV AUTORUN_ENABLED=true
ENV PHP_OPCACHE_ENABLE=1

WORKDIR /var/www/html

COPY --chown=www-data:www-data . .

RUN composer install --no-dev --prefer-dist --no-interaction --optimize-autoloader
{$jsBuildSteps}

ENV SERVER_DOCUMENT_ROOT=/var/www/html/{$documentRoot}
DOCKERFILE;
    }

    private function jsBuildSteps(string $packageManager, ?string $buildCommand): string
    {
        if (! $buildCommand) {
            return '';
        }

        return match ($packageManager) {
            'npm' => "\nRUN npm ci && {$buildCommand}",
            default => "\nRUN curl -fsSL https://bun.sh/install | bash && export PATH=\"/root/.bun/bin:\$PATH\" && bun install --frozen-lockfile && {$buildCommand}",
        };
    }
}