'use strict';
const MAPBOX_API_KEY = 'pk.eyJ1IjoiZ2VyYW5nMSIsImEiOiJjbDg5MHZxcG8wMmo3M3BudnphMWhnN2ZrIn0.SsFGVF-EMHwRYTp7njmb_Q';
/**
* @namespace DataSpace
*/
const DataSpace = {};

DataSpace.BASE_URL = 'http://dataspace.ispc.cnr.it';
DataSpace.RES_ENDPOINT = '/resources/';
DataSpace.FILES_URI = `${DataSpace.BASE_URL}/files/uploadedfiles/`;
DataSpace.OBJECT_ORDER = {
    "Object Type" : null,
    "Object ID" : null,
    "Object Excavation code" : null,
    "Object Chronology" : null,
    "Object Era" : null,
    "Object Geographical Context of Discovery" : null,
    "Object Dimensions" : null,
    "Object Material" : null,
    "Object Description" : null,
    "Object Conservation State" : null,
    "Object Reused?" : null,
    "Object Project" : null,
    "Object Compiler" : null,
    "Object Bibliography" : null,
};
/*
export const SAMPLE_ORDER = {

};
*/
const OBJECT_REPORT = new Map();
OBJECT_REPORT.set(
    'before-gallery',
    {
        "Object Type" : null,
        "Object ID" : null,
        "Object Excavation code" : null,
        "Object Chronology" : null,
        "Object Era" : null,
        "Object Geographical Context of Discovery" : null,
        "Object Dimensions" : null,
        "Object Material" : null,
    }
);
OBJECT_REPORT.set(
    'after-gallery-1-col',
    {
        "Object Description" : null,
        "Object Conservation State" : null,
    }
);
OBJECT_REPORT.set(
    'after-gallery-2-col',
    {
        "Object Reused?" : null,
        "Object Project" : null,
        "Object Compiler" : null,
        "Object Bibliography" : null,
    }
);
DataSpace.OBJECT_REPORT = OBJECT_REPORT;
/**
 * Populate partial objects from
 * resource object based on Map
 * @todo
 * @param {object} resource
 * 
 * @return {Map<string, object>}
 */
DataSpace.createObjectShape = function (resource) {
    const shape = this.OBJECT_REPORT;

    let beforeGallery = shape.get('before-gallery'),
        afterGalleryCol1 = shape.get('after-gallery-1-col'),
        afterGalleryCol2 = shape.get('after-gallery-2-col');

    // TODO export to private function
    for (const key in shape.get('before-gallery')) {
        if (resource[key]) {
            beforeGallery[key] = resource[key];
        } else {
            delete beforeGallery[key];
        }
    }

    for (const key in shape.get('after-gallery-1-col')) {
        if (resource[key]) {
            afterGalleryCol1[key] = resource[key];
        } else {
            delete afterGalleryCol1[key];
        }
    }

    for (const key in shape.get('after-gallery-2-col')) {
        if (resource[key]) {
            afterGalleryCol2[key] = resource[key];
        } else {
            delete afterGalleryCol2[key];
        }
    }

    shape.set('before-gallery', beforeGallery);
    shape.set('after-gallery-1-col', afterGalleryCol1);
    shape.set('after-gallery-2-col', afterGalleryCol2);

    return shape;
}
/**
 * @todo Refactor!!
 *
 * @param {object} report The report's JSON object
 * @param {string[]} images Filenames of images
 *
 * @return {void}
 */
DataSpace.renderObjectReport = function (report, images)
{
    // TODO
    const resource = Object.assign(this.OBJECT_ORDER, report.resource);
    const shape = this.createObjectShape(resource);

    let resKeys = Object.keys(resource);
    // Default value...
    let resType = 'Object';
    // TODO
    if (!resKeys.length) {
        location.href = '/404.html';
        return;
    }

    resType = resKeys[0].split(' ')[0]; 
    // TODO use match...
    // TODO check if coordinates exists...
    const coordinates = resource['Object Coordinates']
        ?.replace(/^.*coordinates\':\s?\[(\d+\.\d+,\s?\d+\.\d+)\].*$/, "$1")
        ?.split(', ');

    let lat, long;
    [long, lat] = coordinates;
    
    this.createMap([lat, long]);

    // Write coordinates below map
    document.querySelector('#coord').innerHTML = `
        <span><strong>Latitude</strong>: ${lat}</span>
        <span><strong>Longitude</strong>: ${long}</span>  
    `;

    resKeys = resKeys.filter(e => !e.includes('Coordinates'));

    document.querySelector('#rep-tit')
        .innerText = `${resType} ${report.displayname}`;

    _createObjectTable(resType, shape, resource);

    if (images.length) {
        _createImgGallery(images, 'gallery');
    }

    // Create after-gallery...
    _createObjectTail(resType, shape, resource);
}
/**
 * Fetch JSON report...
 * @param {string} uuid The resource's UUID in Arches
 * @param {string} format Either 'json' or 'arches-json'
 * 
 * @return {object}
 */
DataSpace.fetchReport = async function (uuid, format='json')
{
    return await fetch(
            `${this.BASE_URL}${this.RES_ENDPOINT}${uuid}?format=${format}&indent=2`
        )
        .then(res => res.json())
        .catch(excep => {
            _fetchError(excep, 'error');
            document.querySelector('.modal')
                .classList.remove('active');
        });
}
/**
 * Add window.print to link in navbar
 * 
 * @return {void}
 */
DataSpace.printReport = function () {
    document.querySelector('#print')
        .addEventListener('click', () => {
            window.print();
    });
}
/**
 * @todo Use OpenLayers?
 * Attach Leaflet.js map to HTML element
 * 
 * @param {string[]} coordinates 
 * @param {string} htmlId 
 * 
 * @return {void}
 */
DataSpace.createMap = function (coordinates, htmlId = 'map') {
    const mapboxAttribution = `© <a href="https://www.mapbox.com/about/maps/">Mapbox</a>`;
    const mapboxSat = `https://api.mapbox.com/v4/mapbox.satellite/18/152278/101181.webp?access_token=${MAPBOX_API_KEY}`;
    const streets = L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
        maxZoom: 18,
        attribution: '© <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
    });
    const satellite = L.tileLayer(
        mapboxSat,
        {
            id: 'mapbox/satellite-v9',
            tileSize: 512,
            zoomOffset: -1,
            attribution: mapboxAttribution
        }
    );
    const baseMaps = {
        "OpenStreetMap": streets,
        "Mapbox Satellite": satellite
    };
    const map = L.map(htmlId, {
        center: coordinates,
        zoom: 18,
        layers: [streets, satellite]
    });

    L.control.layers(baseMaps).addTo(map);

    L.marker(coordinates).addTo(map)
        .bindPopup(`lat.: ${coordinates[0]}, long. : ${coordinates[1]}`);
}
/**
 * @todo Use TS to define object shape
 * @param {object} resource The resource object (Arches JSON!)
 *
 * @return {string[]}
 */
DataSpace.getImagesSrc = function (resource) {
    // TODO don't filter this array, populate another one
    let arr = resource.tiles
        .filter(tile => { 
            let key = Object.keys(tile.data)[0];
            return Array.isArray(tile.data[key]);
        }).filter(o => {
            let key = Object.keys(o.data)[0];
            return Object.keys(o.data[key][0]).includes('file_id');
        });

    let fileNames = [],
        dataObjects = [];

    arr.forEach(d => dataObjects.push(d.data));

    dataObjects.forEach(e => {
        e[Object.keys(e)[0]].forEach(o => {
            fileNames.push(this.FILES_URI + o.name)
        });
    });

    return fileNames;
}

/**
 * @todo The order of elements in the tiles array
 *       in arches-json is the same as that of
 *       objects in the JSON resource (report)
 *
 * @param {object} resource The resource object (Arches JSON!)
 *
 * @return {string[]}
DataSpace.getLinkedData = function (resource) 
{
}
*/

function _fetchError(message, htmlId)
{
    const error = document.createElement('div');
    const clear = document.createElement('button');
    error.className = 'toast toast-error';
    clear.className = 'btn btn-clear float-right';

    error.appendChild(clear);
    error.textContent = message;

    document.querySelector(`#${htmlId}`).appendChild(error);
}

function _createImgGallery(images, htmlId)
{
    let gallery = document.querySelector(`#${htmlId}`);
    gallery.parentElement
        .classList.remove('d-hide');

    for (const src of images) {
        const img = document.createElement('img');
        img.className = 'img-responsive img-fit-cover';
        img.src = src;

        const col = document.createElement('div');
        col.className = 'column col-3 c-hand spotlight';
        col.setAttribute('data-src', src);
        col.setAttribute('data-download', true);

        col.appendChild(img);
        gallery.appendChild(col);
    }
}

function _createObjectTable(resType, shape, resource)
{
    const tableElement = document.querySelector('#res-before tbody');
    for (const key in shape.get('before-gallery')) {
        const row = document.createElement('tr');
        let innerList = null;
        
        // TODO refactor
        if (typeof resource[key] == 'object') {
            innerList = document.createElement('ul');

            for (const innerKey in resource[key]) {
                const li = document.createElement('li');

                li.innerHTML = innerKey === '@value' ?
                    resource[key]['@value'] :
                    `<strong>${innerKey.replace(key,'')}</strong>:
                    ${resource[key][innerKey]}`;

                if (resource[key][innerKey] !== null) {
                    innerList.appendChild(li);
                }
            }
        }

        let value = innerList !== null ? 
            innerList.outerHTML : resource[key];

        row.innerHTML = `
            <td class="text-bold key">${key.replace(resType, '')}</td>
            <td>${value}</td>
        `;

        if (!key.includes('Images') && !key.includes('Photos')) {
            tableElement.appendChild(row);
        }
    }
}

function _createObjectTail(resType, shape, resource)
{
    let after = document.querySelector('#res-after');

    for (const key in shape.get('after-gallery-1-col')) {
        const col = document.createElement('div');

        col.className = 'column col-12';
        col.innerHTML = `
            <p class="text-bold">${key.replace(resType, '')}</p>
            <p>${resource[key]}</p>
        `;

        after.appendChild(col);
    }

    for (const key in shape.get('after-gallery-2-col')) {
        const col = document.createElement('div');

        col.className = 'column col-6';
        let displayValue = resource[key];
        const isNested = typeof resource[key] === 'object';

        if (isNested) {
            for (const innerKey in resource[key]) {
                if (resource[key][innerKey] !== "") {
                    const innerCol = document.createElement('div');
                    innerCol.className = 'column col-6';
                    innerCol.innerHTML = innerKey === '@value' ?
                        `
                            <p class="text-bold">${key.replace(resType, '')}</p>
                            <p>${displayValue['@value'].replace('False', 'No')
                                .replace('True', 'Yes')}</p>
                        ` :
                        `
                            <p class="text-bold">${innerKey.replace(resType, '')}</p>
                            <p>${displayValue[innerKey]}</p>
                        ` ;

                    after.appendChild(innerCol);
                }
            }
        } else {
            col.innerHTML = `
                <p class="text-bold">${key.replace(resType, '')}</p>
                <p>${displayValue}</p>
            `;

             after.appendChild(col); 
        }
    }
}

export default DataSpace;