<?php

namespace App\Classes;

use App\Services\Markdown\Formatter;
use App\Services\Markdown\Linter;
use Illuminate\Filesystem\FilesystemAdapter;

class MarkdownManager
{
    /**
     * Original markdown content
     */
    private ?string $originalContent = null;

    private FilesystemAdapter $disk;

    private bool $isLoaded = false;

    /**
     * Current markdown content
     */
    private ?string $content = null;

    public function __construct(
        protected string $filename,
        protected Bundle $bundle
    ) {
        $this->disk = $bundle->getDisk();
    }

    /**
     * Return a boolean value indicating if the file actually exists on disk
     */
    public function exists()
    {
        return $this->disk->exists($this->filename);
    }

    /**
     * Load markdown file
     */
    public function load(bool $reload = false)
    {
        if (!$this->isLoaded || $reload) {
            $content = $this->disk->get($this->filename);

            $this->originalContent = $content;
            $this->content         = $content;
            $this->isLoaded        = true;
        }
    }

    /**
     * Return current markdown content
     */
    public function get(): ?string
    {
        return $this->content;
    }

    /**
     * Convert markdown to HTML
     */
    public function render()
    {
        $content   = $this->bundle->replaceAttachmentsInMarkdown($this->content ?? '');
        $formatter = new Formatter($content, $this->bundle);
        $result    = $formatter->render();

        return $result;
    }

    /**
     * Set current markdown content
     */
    public function set(?string $content = null): void
    {
        $this->content = $content;
    }

    /**
     * Return a boolean value indicating if the file has changed since it was
     * loaded
     */
    public function isDirty(): bool
    {
        return $this->originalContent !== $this->content;
    }

    /**
     * Lint markdown
     */
    public function lint(): void
    {
        if (!empty($this->content)) {
            $linter = new Linter($this->content);

            $this->content = $linter->format();

            $this->save();
        }
    }

    /**
     * Store file on disk
     */
    public function save(): bool
    {
        if (!$this->isDirty()) {
            return false;
        }

        $this->disk->put($this->filename, $this->content ?? '');

        $this->originalContent = $this->content;

        return true;
    }
}