<?php declare(strict_types=1);

namespace Picea;

class FileFetcher
{
    protected array $folderList = [];

    public array $supportedExtensionList = [
        "phtml", "php", "html",
    ];

    public function __construct(?array $folderList = null) {
        if ( $folderList !== null ) {
            $this->folderList = $folderList;
        }
    }

    public function addFolder(string $folder, int $order = 100) : void
    {
        $folder = rtrim($folder, DIRECTORY_SEPARATOR);

        $this->folderList[$folder] = [
            'path' => $folder,
            'order' => $order,
        ];
    }

    public function addFolders(array $folderList) : void
    {
        $this->folderList = array_replace($this->folderList, $folderList);
    }

    public function folderList(?array $set = null) : ?array
    {
        return $set === null ? $this->folderList : $this->folderList = $set;
    }

    public function findFile(string $fileName) : string
    {
        usort($this->folderList, fn($a, $b) => $a['order'] <=> $b['order']);

        foreach($this->folderList as $folder) {
            foreach($this->supportedExtensionList as $extension) {
                $file = $folder['path'] . DIRECTORY_SEPARATOR . "$fileName.$extension";

                if ( file_exists($file) ) {
                    return $file;
                }
            }
        }

        # Fallback on full-path
        foreach($this->folderList as $folder) {
            $file = $folder['path'] . DIRECTORY_SEPARATOR . $fileName;

            if ( file_exists($file) ) {
                return $file;
            }
        }

        throw new \RuntimeException("Given view file `$fileName` can not be found within given folder list..");
    }

    public function getFilePath(string $fileName) : string
    {
        return $this->findFile($fileName);
    }

    public function getFileContent(string $fileName) : string
    {
        return file_get_contents($this->getFilePath($fileName));
    }
}