import { Container } from "./Container";
import { generatedAttribute } from "./Utils/Constants";
import { getRandom } from "../Utils/NumberUtils";
import { itemFromSingleOrMultiple } from "../Utils/Utils";
async function getDataFromUrl(jsonUrl, index) {
    const url = itemFromSingleOrMultiple(jsonUrl, index);
    if (!url) {
        return;
    }
    const response = await fetch(url);
    if (response.ok) {
        return response.json();
    }
    console.error(`tsParticles - Error ${response.status} while retrieving config file`);
}
export class Loader {
    constructor(engine) {
        this._engine = engine;
    }
    load(tagId, options, index) {
        const params = { index, remote: false };
        if (typeof tagId === "string") {
            params.tagId = tagId;
        }
        else {
            params.options = tagId;
        }
        if (typeof options === "number") {
            params.index = options;
        }
        else {
            params.options = options !== null && options !== void 0 ? options : params.options;
        }
        return this.loadOptions(params);
    }
    async loadJSON(tagId, jsonUrl, index) {
        let url, id;
        if (typeof jsonUrl === "number" || jsonUrl === undefined) {
            url = tagId;
        }
        else {
            id = tagId;
            url = jsonUrl;
        }
        return this.loadRemoteOptions({ tagId: id, url, index, remote: true });
    }
    async loadOptions(params) {
        var _a, _b, _c;
        const tagId = (_a = params.tagId) !== null && _a !== void 0 ? _a : `tsparticles${Math.floor(getRandom() * 10000)}`, { index, url: jsonUrl, remote } = params, options = remote ? await getDataFromUrl(jsonUrl, index) : params.options;
        let domContainer = (_b = params.element) !== null && _b !== void 0 ? _b : document.getElementById(tagId);
        if (!domContainer) {
            domContainer = document.createElement("div");
            domContainer.id = tagId;
            (_c = document.querySelector("body")) === null || _c === void 0 ? void 0 : _c.append(domContainer);
        }
        const currentOptions = itemFromSingleOrMultiple(options, index), dom = this._engine.dom(), oldIndex = dom.findIndex((v) => v.id === tagId);
        if (oldIndex >= 0) {
            const old = this._engine.domItem(oldIndex);
            if (old && !old.destroyed) {
                old.destroy();
                dom.splice(oldIndex, 1);
            }
        }
        let canvasEl;
        if (domContainer.tagName.toLowerCase() === "canvas") {
            canvasEl = domContainer;
            canvasEl.dataset[generatedAttribute] = "false";
        }
        else {
            const existingCanvases = domContainer.getElementsByTagName("canvas");
            if (existingCanvases.length) {
                canvasEl = existingCanvases[0];
                canvasEl.dataset[generatedAttribute] = "false";
            }
            else {
                canvasEl = document.createElement("canvas");
                canvasEl.dataset[generatedAttribute] = "true";
                domContainer.appendChild(canvasEl);
            }
        }
        if (!canvasEl.style.width) {
            canvasEl.style.width = "100%";
        }
        if (!canvasEl.style.height) {
            canvasEl.style.height = "100%";
        }
        const newItem = new Container(this._engine, tagId, currentOptions);
        if (oldIndex >= 0) {
            dom.splice(oldIndex, 0, newItem);
        }
        else {
            dom.push(newItem);
        }
        newItem.canvas.loadCanvas(canvasEl);
        await newItem.start();
        return newItem;
    }
    async loadRemoteOptions(params) {
        return this.loadOptions(params);
    }
    async set(id, domContainer, options, index) {
        const params = { index, remote: false };
        if (typeof id === "string") {
            params.tagId = id;
        }
        else {
            params.element = id;
        }
        if (domContainer instanceof HTMLElement) {
            params.element = domContainer;
        }
        else {
            params.options = domContainer;
        }
        if (typeof options === "number") {
            params.index = options;
        }
        else {
            params.options = options !== null && options !== void 0 ? options : params.options;
        }
        return this.loadOptions(params);
    }
    async setJSON(id, domContainer, jsonUrl, index) {
        let url, newId, newIndex, element;
        if (id instanceof HTMLElement) {
            element = id;
            url = domContainer;
            newIndex = jsonUrl;
        }
        else {
            newId = id;
            element = domContainer;
            url = jsonUrl;
            newIndex = index;
        }
        return this.loadRemoteOptions({ tagId: newId, url, index: newIndex, element, remote: true });
    }
}