'use strict';
const os = require('os');
const path = require('path');
const fs = require('fs');
const { ipcRenderer } = require('electron');

exports.load_config = function () {
    console.log('CWD: '+process.cwd());

    let home_directory = require('os').homedir();
    console.log('Home: '+home_directory);

    let tmp_directory = require('os').tmpdir();
    console.log('Temporary: '+tmp_directory);

    let config = null;
    let config_directory = null;
    let default_config_path = path.join(process.cwd(),'config.json.default');
    let config_path = null;

    if (os.platform == 'darwin') {
        config_directory = path.join(home_directory, 'Library/Application Support/OSIT');
        console.log('macOS config directory: '+config_directory);
    } else if (os.platform == 'linux') {
        config_directory = path.join(home_directory, '.config/OSIT');
        console.log('Linux config directory: '+config_directory);
    }

    if (fs.existsSync(config_directory)) {
        console.log('Config: '+config_directory);
        config_path = path.join(config_directory, 'config.json');
    } else {
        fs.mkdirSync(config_directory);
        console.log('Config directory created: '+config_directory);

        //default_config_path = path.join(process.cwd(),'config.json.default');
        config_path = path.join(config_directory, 'config.json');
        fs.copyFileSync(default_config_path, config_path);
        console.log('Default config file copied: '+config_directory);
    }

    if (fs.existsSync(config_path)) {
        console.log('Config path: '+config_path);
        console.log('Config file (config.json) found under '+config_directory+'.');

        config = JSON.parse(fs.readFileSync(config_path));
        console.log('Config file read.');
    } else if (!fs.existsSync(config_path)) {
        fs.copyFileSync(default_config_path, config_path);
        console.log('Default config file copied: '+config_directory);

        config = JSON.parse(fs.readFileSync(config_path));
        console.log('Config file read.');
    } else if (fs.existsSync('config.json')) {
        //fs.copyFileSync(default_config_path, config_path);
        //console.log('Default config file copied: '+config_directory);

        config = JSON.parse(fs.readFileSync('config.json'));
        console.log('Config file (config.json) not found under '+config_directory+'. Using config in CWD.');
        console.log('Config file read.');

        //console.log('Config file (config.json) not found under '+config_directory+'. Using config in CWD.');
        //config = JSON.parse(fs.readFileSync('config.json'));
    } else {
        //close();
    }
    //console.log(config);
    return config;
}


exports.check_file_cache = async function (host_file_cache_path, event_file_id, hash) {
    console.log('**** *** ** * FUNCTION: check_file_cache (v3) * ** *** ****');
    console.log('Checking the local file cache against the remote server.');

    event_file_id; // NOTE: This is the event_file.id_random or event_file.event_file_id_random
    let hash_filename = hash+'.file';

    let save_path = path.join(host_file_cache_path, hash_filename);
    console.log(save_path);

    if (fs.existsSync(save_path)) {
        console.log('Hashed file cache already exists: '+save_path);
    } else {
        console.log('Hashed file not found in local cache. Downloading file: '+save_path);
        let endpoint = `/event/file/${event_file_id}/download`;
        ipcRenderer.send('download_file', api_base_url, endpoint, save_path); // Must download file using main node.js thread.
    }

    return true;
}


exports.check_file_cache_v1 = async function () {
    console.log('**** *** ** * FUNCTION: check_file_cache * ** *** ****');
    console.log('Checking the local file cache against the remote server.');

    if (api_base_url && api_temporary_token) {
        tbl_event_file.iterate(function(file_value, key, iteration) {
            //if (file_value.event_location_id == event_location_id) {
            //console.log('f: ('+file_value.event_file_id+') '+file_value.event_file_filename+' ***')

            let file_id = file_value.id; // NOTE: This is the event_file.id or event_file_id.
            let filename = file_value.hosted_file_hash_sha256+'.file';

            let save_path = path.join(host_file_cache_path, filename);
            //console.log(save_path);

            if (fs.existsSync(save_path)) {
                //console.log('Local file already exists: '+save_path);
            } else {
                console.log('File not found locally. Downloading file: '+save_path);
                let api_endpoint = '/event/file/'+file_id+'/download';
                ipcRenderer.send('download_file', api_base_url, api_endpoint, api_temporary_token, save_path); // Must download file using main node.js thread.
            }
        });
    } else {
        console.log('The api_base_url or api_temporary_token has not been set.');
        console.log(api_base_url);
        console.log(api_temporary_token);
        return false;
    }

    return true;
}


exports.currently_online = function() {
    //alert('You are currently online');
    console.log('Currently online');
    app_online = true;
    //document.getElementById('app_network_status').classList.remove('alert-info');
    //document.getElementById('app_network_status').classList.remove('warning');
    //document.getElementById('app_network_status').classList.remove('alert-warning');
    //document.getElementById('app_network_status').classList.add('success');
    //document.getElementById('app_network_status').classList.add('alert-success');
    document.getElementById('app_network_status').classList.remove('app_warning');
    //document.getElementById('app_network_status').classList.add('d-none');
    document.getElementById('app_network_status').innerHTML = '<span class="fas fa-check"></span> <span class="fas fa-globe"></span> Currently Online';
    //document.getElementById('app_network_status').innerHTML('Currently Online');
}


exports.currently_offline = function() {
    //alert('You are currently offline');
    console.log('Currently offline');
    app_online = false;
    //document.getElementById('app_network_status').classList.remove('alert-info');
    //document.getElementById('app_network_status').classList.remove('success');
    //document.getElementById('app_network_status').classList.remove('alert-success');
    //document.getElementById('app_network_status').classList.add('warning');
    //document.getElementById('app_network_status').classList.add('alert-warning');
    document.getElementById('app_network_status').classList.add('app_warning');
    //document.getElementById('app_network_status').classList.remove('d-none');
    document.getElementById('app_network_status').innerHTML = '<span class="fas fa-exclamation"></span> <span class="fas fa-globe"></span> Currently Offline';
    //document.getElementById('app_network_status').innerHTML('Currently Offline');
}

//window.addEventListener('online', currently_online);
//window.addEventListener('offline', currently_offline);