var fs = require('fs-extra')
var path = require('path')
const config_api = require('./config');

const is_windows = process.platform === 'win32';

function getTrueFileName(unfixed_path, type) {
    let fixed_path = unfixed_path;

    const new_ext = (type === 'audio' ? 'mp3' : 'mp4');
    let unfixed_parts = unfixed_path.split('.');
    const old_ext = unfixed_parts[unfixed_parts.length-1];


    if (old_ext !== new_ext) {
        unfixed_parts[unfixed_parts.length-1] = new_ext;
        fixed_path = unfixed_parts.join('.');
    }
    return fixed_path;
}

function getJSONMp4(name, customPath, openReadPerms = false) {
    var obj = null; // output
    if (!customPath) customPath = config_api.getConfigItem('ytdl_video_folder_path');
    var jsonPath = path.join(customPath, name + ".info.json");
    var alternateJsonPath = path.join(customPath, name + ".mp4.info.json");
    if (fs.existsSync(jsonPath))
    {
        obj = JSON.parse(fs.readFileSync(jsonPath, 'utf8'));
    } else if (fs.existsSync(alternateJsonPath)) {
        obj = JSON.parse(fs.readFileSync(alternateJsonPath, 'utf8'));
    }
    else obj = 0;
    return obj;
}

function getJSONMp3(name, customPath, openReadPerms = false) {
    var obj = null;
    if (!customPath) customPath = config_api.getConfigItem('ytdl_audio_folder_path');
    var jsonPath = path.join(customPath, name + ".info.json");
    var alternateJsonPath = path.join(customPath, name + ".mp3.info.json");
    if (fs.existsSync(jsonPath)) {
        obj = JSON.parse(fs.readFileSync(jsonPath, 'utf8'));
    }
    else if (fs.existsSync(alternateJsonPath)) {
        obj = JSON.parse(fs.readFileSync(alternateJsonPath, 'utf8'));
    }
    else
        obj = 0;

    return obj;
}

function fixVideoMetadataPerms(name, type, customPath = null) {
    if (is_windows) return;
    if (!customPath) customPath = type === 'audio' ? config_api.getConfigItem('ytdl_audio_folder_path')
                                                   : config_api.getConfigItem('ytdl_video_folder_path');

    const ext = type === 'audio' ? '.mp3' : '.mp4';
    
    const files_to_fix = [
        // JSONs
        path.join(customPath, name + '.info.json'),
        path.join(customPath, name + ext + '.info.json'),
        // Thumbnails
        path.join(customPath, name + '.webp'),
        path.join(customPath, name + '.jpg')
    ];

    for (const file of files_to_fix) {
        if (!fs.existsSync(file)) continue;
        fs.chmodSync(file, 0o644);
    }
}

// objects

function File(id, title, thumbnailURL, isAudio, duration, url, uploader, size, path, upload_date) {
    this.id = id;
    this.title = title;
    this.thumbnailURL = thumbnailURL;
    this.isAudio = isAudio;
    this.duration = duration;
    this.url = url;
    this.uploader = uploader;
    this.size = size;
    this.path = path;
    this.upload_date = upload_date;
}

module.exports = {
    getJSONMp3: getJSONMp3,
    getJSONMp4: getJSONMp4,
    getTrueFileName: getTrueFileName,
    fixVideoMetadataPerms: fixVideoMetadataPerms,
    File: File
}