<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Support\Facades\File;

/**
 * Create the platform folder from platform.example/. With --from-current, also copy what this installation runs on
 * today: config/<TIMEBANK_CONFIG>.php to config.php, the active theme to theme.php. Never overwrites a file; the old
 * files stay in place (platform:check warns while both exist).
 */
class PlatformInit extends Command
{
    protected $signature = 'platform:init {--from-current : Copy the active platform config and theme into the folder}';

    protected $description = 'Create the platform folder (optionally from the current config and theme)';

    public function handle(): int
    {
        $root = platform_path();
        $skeleton = base_path('platform.example');

        foreach (File::allFiles($skeleton, true) as $file) {
            $this->copyIfMissing($file->getPathname(), "{$root}/{$file->getRelativePathname()}");
        }

        if ($this->option('from-current')) {
            $name = (string) config('app.timebank_config');
            if (is_file(config_path("{$name}.php"))) {
                $this->copyIfMissing(config_path("{$name}.php"), "{$root}/config.php");
            } else {
                $this->warn("No config/{$name}.php to copy.");
            }

            $id = theme_id();
            $theme = ['id' => $id, ...(config("themes.themes.{$id}") ?? [])];
            $this->writeIfMissing("{$root}/theme.php", "<?php\n\n// The theme of this platform, copied from config/themes.php ({$id}) by platform:init.\nreturn " . $this->export($theme) . ";\n");

            $this->newLine();
            $this->line('Brand files to copy by hand, if this platform has them:');
            // The files in use now, after the fallbacks (a theme's own logo, the generated text logo, the default)
            foreach ([false => 'mail-logo.png', true => 'mail-logo-inverted.png'] as $inverted => $target) {
                $logo = theme_email_logo_file((bool) $inverted);
                if (is_file($logo)) {
                    $this->line('  ' . (str_starts_with($logo, base_path() . '/') ? substr($logo, strlen(base_path()) + 1) : $logo) . " -> platform/public/{$target}");
                }
            }
            if ($dir = theme_logo('favicon_dir')) {
                $this->line("  public/{$dir}/* -> platform/public/");
            }
            $this->line('  a changed logo: php artisan platform:override ' . (theme_logo('svg_inline') ?: "logos.{$id}"));
        }

        $this->newLine();
        $this->info("Platform folder: {$root}. Then: php artisan platform:link, php artisan platform:check.");

        return self::SUCCESS;
    }

    private function copyIfMissing(string $from, string $to): void
    {
        if (file_exists($to)) {
            $this->line("  kept      {$to}");

            return;
        }
        File::ensureDirectoryExists(dirname($to));
        File::copy($from, $to);
        $this->line("  created   {$to}");
    }

    private function writeIfMissing(string $to, string $content): void
    {
        if (file_exists($to)) {
            $this->line("  kept      {$to}");

            return;
        }
        File::ensureDirectoryExists(dirname($to));
        File::put($to, $content);
        $this->line("  created   {$to}");
    }

    /** An array as PHP source with short array syntax, indented like the config files. */
    private function export(mixed $value, int $depth = 0): string
    {
        if (!is_array($value)) {
            return var_export($value, true);
        }

        $pad = str_repeat('    ', $depth + 1);
        $isList = array_is_list($value);
        $lines = array_map(
            fn ($key, $item) => $pad . ($isList ? '' : var_export($key, true) . ' => ') . $this->export($item, $depth + 1) . ',',
            array_keys($value),
            $value
        );

        return $lines ? "[\n" . implode("\n", $lines) . "\n" . str_repeat('    ', $depth) . ']' : '[]';
    }
}