<?php
declare(strict_types=1);

namespace Esun\Video\Model;

use Magento\Framework\Exception\LocalizedException;
use Symfony\Component\Process\Process;

class Ffprobe
{
    public function __construct(private readonly Config $config)
    {
    }

    public function inspect(string $absoluteFile): array
    {
        $process = new Process([
            $this->config->getFfprobeBinary(),
            '-v', 'error',
            '-select_streams', 'v:0',
            '-show_entries', 'format=format_name,duration,size:stream=width,height,codec_name',
            '-of', 'json',
            $absoluteFile,
        ]);
        $process->setTimeout(60);
        try {
            $process->run();
        } catch (\Throwable $e) {
            throw new LocalizedException(__('Unable to run ffprobe: %1', $e->getMessage()));
        }

        if (!$process->isSuccessful()) {
            throw new LocalizedException(
                __('ffprobe failed: %1', trim($process->getErrorOutput()) ?: __('unknown error'))
            );
        }

        $data = json_decode($process->getOutput(), true);
        $stream = $data['streams'][0] ?? [];
        $format = $data['format'] ?? [];
        $formatName = strtolower((string)($format['format_name'] ?? ''));
        if (!str_contains($formatName, 'mp4') && !str_contains($formatName, 'mov')) {
            throw new LocalizedException(__('Only MP4 container files are supported.'));
        }
        $width = (int)($stream['width'] ?? 0);
        $height = (int)($stream['height'] ?? 0);
        if ($width <= 0 || $height <= 0) {
            throw new LocalizedException(__('The MP4 file does not contain a readable video stream.'));
        }

        return [
            'duration' => round((float)($format['duration'] ?? 0), 3),
            'size' => (int)($format['size'] ?? filesize($absoluteFile)),
            'width' => $width,
            'height' => $height,
            'resolution' => $this->getResolution($width, $height),
        ];
    }

    private function getResolution(int $width, int $height): string
    {
        $longEdge = max($width, $height);
        $shortEdge = min($width, $height);
        if ($longEdge >= 3840 || $shortEdge >= 2160) {
            return '4K';
        }
        if ($longEdge >= 1920 || $shortEdge >= 1080) {
            return '1080p';
        }
        return $shortEdge . 'p';
    }
}