import {inject, service} from "../core/service";
import {CliService} from "./CliService";

@service('ffmpegService')
export default class FFMpegService {
    @inject('cliService') protected accessor cliService!: CliService;

    async checkFile(filename: string) {
        const file = await this.cliService.runCommand('ffprobe', [
            '-v',
            'quiet',
            '-print_format',
            'json',
            '-show_format',
            filename
        ]);

        if (file.stderr !== '') {
            throw new Error('FFMpeg returned error: ' + file.stderr);
        }

        const json = JSON.parse(file.stdout);

        if (!json || !json.format) {
            throw new Error('FFMpeg did not return format block: ' + file.stdout);
        }

        return {
            type: json.format.format_name,
            duration: parseFloat(json.format.duration),
            size: parseFloat(json.format.size),
            tags: {
                title: json.format.tags?.title || json.format.tags?.TITLE || null,
                album: json.format.tags?.album || json.format.tags?.ALBUM || null,
                artist: json.format.tags?.artist || json.format.tags?.ARTIST || null,
                comment: json.format.tags?.comment || json.format.tags?.COMMENT || null,
                track: json.format.tags?.track || json.format.tags?.TRACK || null,
                genre: json.format.tags?.genre || json.format.tags?.GENRE || null,
                publisher: json.format.tags?.publisher || json.format.tags?.PUBLISHER || null,
                album_artist: json.format.tags?.album_artist || json.format.tags?.ALBUM_ARTIST || null,
                composer: json.format.tags?.composer || json.format.tags?.COMPOSER || null,
                year: json.format.tags?.year || json.format.tags?.YEAR || null,
            },
        };
    }
}