const path = require('path');
const { ipcRenderer } = require('electron');

//exports.render_event_records = function () {
async function render_event_records() {
    console.log('****************** Events ******************');
    console.log('Rendering event records...');
    //console.log(tbl_event);
    //console.log(event_id);

    if (looping_tbl_event) {
        console.log('Already looping through the tbl_event table. Not starting until finished.');
        return false;
    } else {

    }

    looping_tbl_event = true;

    tbl_event.iterate(function(value, key, iteration) {
        if (value.id == event_id) {
            console.log('*** Event id ('+event_id+') found in table.');
            document.getElementById('event_name').innerHTML = '@'+value.name;
            document.getElementById('event_files_menu').getElementsByTagName('ul')[0].id = 'event_files_list_'+value.id;
        } else {
            console.log('Event not it.');
        }
    }).then(function() {
        console.log('idb_to_ui: Iterate tbl_event_file complete')
        //tbl_event_complete = true;
        looping_tbl_event = false;
    });

}


//exports.render_event_location_records = async function () {
async function render_event_location_records() {
    console.log('****************** Locations ******************');
    console.log('Rendering event location records...');

    if (looping_tbl_event_location) {
        console.log('Already looping through the tbl_event_location table. Not starting until finished.');
        return false;
    } else {

    }

    looping_tbl_event_location = true;

    await tbl_event_location.iterate(function(value, key, iteration) {
        if (value.id == event_location_id) {
            console.log('*** Event location id ('+event_location_id+') found in table.');
            document.getElementById('location_name').innerHTML = '<span class="fas fa-map-marker"></span> '+value.name;

            document.getElementById('location_files_menu').getElementsByTagName('ul')[0].id = 'location_files_list_'+value.id;
            /*
            let location_files_ul_node = document.createElement('UL');
            location_files_ul_node.id = 'event_presentation_files_list_'+value.id;
            location_files_ul_node.className = 'list-group list-group-flush location_files location_files_list event_files_list';

            document.getElementById('location_files_menu').appendChild(location_files_ul_node);
            */
        } else {
            console.log('Event location not it.');
        }
    }).then(function() {
        console.log('idb_to_ui: Iterate tbl_event_file complete')
        //tbl_event_location_complete = true;
        looping_tbl_event_location = false;
    });

    return true;
}


/* Updated 2020-01-31 */
function index_launcher_sessions(class_name) {
    console.log('Indexing launcher sessions with class name: '+class_name);
    var class_elements = document.getElementsByClassName(class_name);


    for (var i = 0; i < class_elements.length; i++) {
        class_elements[i].addEventListener( 'click', function() {view_session( this.getAttribute('data-session_id')) } );
    }
    console.log(class_elements);
    return true;
}


/* Updated 2020-01-31 */
function view_session(session_id) {
    var class_elements = document.getElementsByClassName('session_detail'); // This class name should be the class names for each div container
    console.log('View session ID: '+session_id);
    for (var i = 0; i < class_elements.length; i++) {
        //console.log('*** checking: '+class_elements[i].getAttribute('data-session_id'));
        if (class_elements[i].getAttribute('data-session_id') == session_id) {
            //console.log('show');
            class_elements[i].classList.remove('d-none');
            class_elements[i].classList.add('d-block');
        } else {
            //console.log('hide');
            class_elements[i].classList.remove('d-block');
            class_elements[i].classList.add('d-none');
        }
    }

    return true;
}


/* Updated 2020-02-13 */
function index_open_file_buttons(class_name) {
    console.log('****************** Indexing ******************');
    console.log('Indexing open file buttons...');
    var class_elements = document.getElementsByClassName(class_name);
    //console.log(class_elements);

    for (var i = 0; i < class_elements.length; i++) {
        // Do not use an anonymous function. If you do then it will keep adding event listeners.
        // Adding the exact same event listeners over and over doesn't hurt anything.
        // No need to use removeEventListener()
        class_elements[i].addEventListener( 'click', open_local_file );

        /*
        let hash = class_elements[i].getAttribute('data-hash_sha256');
        let file_path = path.join(host_file_cache_path, hash);
        let filename = class_elements[i].getAttribute('data-filename');
        class_elements[i].addEventListener( 'click', function() { ipcRenderer.send('open_local_file', file_path, filename) } );
        */
    }

    return true;
}

/* Updated 2020-02-13 */
function open_local_file() {
    //console.log(this);
    let hash = this.getAttribute('data-hash_sha256');
    let file_path = path.join(host_file_cache_path, hash);
    let filename = this.getAttribute('data-filename');
    console.log(file_path);
    console.log(filename);

    ipcRenderer.send('open_local_file', file_path, filename);
}


function format_bytes(bytes, decimals = 2) {
        if (bytes === 0) return '0 Bytes';

        const k = 1024;
        const dm = decimals < 0 ? 0 : decimals;
        const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];

        const i = Math.floor(Math.log(bytes) / Math.log(k));

        return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
}

function shorten_filename(filename, max_length=45) {
    let length = filename.length;
    let char_over = filename.length-max_length;
    let new_filename = null;
    let wildcards = char_over;
    if (char_over > 0) {
        let part1 = filename.slice(0, 20);
        if (char_over > 5) {
            wildcards = 5;
        } else {
        }
        let part2 = '.'.repeat(wildcards);
        let part3 = filename.slice(-20);

        new_filename = part1+part2+part3;
    } else {
        new_filename = filename;
    }
    return new_filename;
}