<?php

namespace App\Support;

use Illuminate\Support\Facades\File;
use Illuminate\Support\Str;

class ThemeManager
{
    protected string $themesPath;

    public function __construct()
    {
        $this->themesPath = base_path('themes');
    }

    /**
     * Get all available themes.
     */
    public function getThemes(): array
    {
        if (! File::exists($this->themesPath)) {
            return [];
        }

        $directories = File::directories($this->themesPath);
        $themes = [];

        foreach ($directories as $directory) {
            $slug = basename($directory);
            $metadata = $this->getMetadata($slug);
            if ($metadata) {
                $themes[$slug] = $metadata;
            }
        }

        return $themes;
    }

    /**
     * Get metadata for a specific theme.
     */
    public function getMetadata(string $slug): ?array
    {
        $path = "{$this->themesPath}/{$slug}/theme.md";

        if (! File::exists($path)) {
            return null;
        }

        $content = File::get($path);
        return $this->parseMetadata($content, $slug);
    }

    /**
     * Parse theme.md content into metadata array.
     */
    protected function parseMetadata(string $content, string $slug): array
    {
        $metadata = [
            'slug' => $slug,
            'title' => Str::title($slug),
            'author' => 'Unknown',
            'description' => '',
            'parent' => null,
        ];

        $lines = explode("\n", $content);
        foreach ($lines as $line) {
            if (strpos($line, ':') !== false) {
                $parts = explode(':', $line, 2);
                $key = strtolower(trim($parts[0]));
                $value = trim($parts[1]);

                if (array_key_exists($key, $metadata)) {
                    $metadata[$key] = $value;
                }
            }
        }

        return $metadata;
    }

    /**
     * Get the active theme slug.
     */
    public function getActiveTheme(): string
    {
        return \App\Models\Setting::get('active_theme', config('cms.active_theme', 'icehouse'));
    }

    /**
     * Get the asset path for a theme, searching Child -> Parent.
     */
    public function getAssetPath(string $path, string $activeTheme): ?string
    {
        $metadata = $this->getMetadata($activeTheme);
        $paths = [$activeTheme];

        if ($metadata && !empty($metadata['parent'])) {
            $paths[] = $metadata['parent'];
        }

        foreach ($paths as $themeSlug) {
            if (File::exists("{$this->themesPath}/{$themeSlug}/{$path}")) {
                return "themes/{$themeSlug}/{$path}";
            }
        }

        return null;
    }
}