/*
 * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
 *
 *  Copyright (C) 2019 - 2024 Jan Böhmer (https://github.com/jbtronics)
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published
 *  by the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

import { Controller } from "@hotwired/stimulus";
import { autocomplete } from '@algolia/autocomplete-js';
//import "@algolia/autocomplete-theme-classic/dist/theme.css";
import "../../css/components/autocomplete_bootstrap_theme.css";
import { createLocalStorageRecentSearchesPlugin } from '@algolia/autocomplete-plugin-recent-searches';
import {marked} from "marked";

import {
    trans,
} from '../../translator';


/**
 * This controller is responsible for the search fields in the navbar and the homepage.
 * It uses the Algolia Autocomplete library to provide a fast and responsive search.
 */
export default class extends Controller {

    static targets = ["input"];

    _autocomplete;

    // Highlight the search query in the results
    _highlight = (text, query) => {
        if (!text) return text;
        if (!query) return text;

        const HIGHLIGHT_PRE_TAG = '__aa-highlight__'
        const HIGHLIGHT_POST_TAG = '__/aa-highlight__'

        const escaped = query.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&');
        const regex = new RegExp(escaped, 'gi');

        return text.replace(regex, (match) => `${HIGHLIGHT_PRE_TAG}${match}${HIGHLIGHT_POST_TAG}`);
    }

    initialize() {
        // The endpoint for searching parts or assemblies
        const base_url = this.element.dataset.autocomplete;
        // The URL template for the part detail pages
        const part_detail_uri_template = this.element.dataset.detailUrl;
        // The URL template for the assembly detail pages
        const assembly_detail_uri_template = this.element.dataset.assemblyDetailUrl;
        // The URL template for the project detail pages
        const project_detail_uri_template = this.element.dataset.projectDetailUrl;

        const hasAssemblyDetailUrl =
            typeof assembly_detail_uri_template === "string" && assembly_detail_uri_template.length > 0;
        const hasProjectDetailUrl =
            typeof project_detail_uri_template === "string" && project_detail_uri_template.length > 0;

        //The URL of the placeholder picture
        const placeholder_image = this.element.dataset.placeholderImage;

        //If the element is in navbar mode, or not
        const navbar_mode = this.element.dataset.navbarMode === "true";

        const that = this;

        const recentSearchesPlugin = createLocalStorageRecentSearchesPlugin({
            key: 'RECENT_SEARCH',
            limit: 5,
        });

        // Cache the last query to avoid fetching the same endpoint twice (parts source + assemblies source)
        let lastQuery = null;
        let lastFetchPromise = null;

        const fetchMixedItems = (query) => {
            if (query === lastQuery && lastFetchPromise) {
                return lastFetchPromise;
            }

            lastQuery = query;

            const urlString = base_url.replace('__QUERY__', encodeURIComponent(query));
            const url = new URL(urlString, window.location.href);
            if (hasAssemblyDetailUrl || hasProjectDetailUrl) {
                url.searchParams.set('multidatasources', '1');
            }

            lastFetchPromise = fetch(url.toString())
                .then((response) => response.json())
                .then((items) => {
                    //Iterate over all fields besides the id and highlight them (if present)
                    const fields = ["name", "description", "category", "footprint"];

                    items.forEach((item) => {
                        for (const field of fields) {
                            if (item[field] !== undefined && item[field] !== null) {
                                item[field] = that._highlight(item[field], query);
                            }
                        }
                    });

                    return items;
                });

            return lastFetchPromise;
        };

        this._autocomplete = autocomplete({
            container: this.element,
            //Place the panel in the navbar, if the element is in navbar mode
            panelContainer: navbar_mode ? document.getElementById("navbar-search-form") : document.body,
            panelPlacement: this.element.dataset.panelPlacement,
            plugins: [recentSearchesPlugin],
            openOnFocus: true,
            placeholder: trans("search.placeholder"),
            translations: {
                submitButtonTitle: trans("search.submit")
            },

            // Use a navigator compatible with turbo:
            navigator: {
                navigate({ itemUrl }) {
                    window.Turbo.visit(itemUrl, { action: "advance" });
                },
                navigateNewTab({ itemUrl }) {
                    const windowReference = window.open(itemUrl, '_blank', 'noopener');

                    if (windowReference) {
                        windowReference.focus();
                    }
                },
                navigateNewWindow({ itemUrl }) {
                    window.open(itemUrl, '_blank', 'noopener');
                },
            },

            // If the form is submitted, forward the term to the form
            onSubmit({ state, event, ...setters }) {
                //Put the current text into each target input field
                const input = that.inputTarget;

                if (!input) {
                    return;
                }

                //Do not submit the form, if the input is empty
                if (state.query === "") {
                    return;
                }

                input.value = state.query;
                input.form.requestSubmit();
            },

            getSources({ query }) {
                const sources = [
                    // Parts source (filtered from mixed endpoint results)
                    {
                        sourceId: 'parts',
                        getItems() {
                            return fetchMixedItems(query).then((items) =>
                                items.filter((item) => item.type !== "assembly")
                            );
                        },
                        getItemUrl({ item }) {
                            return part_detail_uri_template.replace('__ID__', item.id);
                        },
                        templates: {
                            header({ html }) {
                                return html`<span class="aa-SourceHeaderTitle">${trans("part.labelp")}</span>
                                        <div class="aa-SourceHeaderLine" />`;
                            },
                            item({ item, components, html }) {
                                const details_url = part_detail_uri_template.replace('__ID__', item.id);

                                return html`
                                        <a class="aa-ItemLink" href="${details_url}">
                                            <div class="aa-ItemContent">
                                                <div class="aa-ItemIcon aa-ItemIcon--picture aa-ItemIcon--alignTop">
                                                    <img src="${item.image !== "" ? item.image : placeholder_image}" alt="${item.name}" width="30" height="30"/>
                                                </div>
                                                <div class="aa-ItemContentBody">
                                                    <div class="aa-ItemContentTitle">
                                                        <b>
                                                            ${components.Highlight({hit: item, attribute: 'name'})}
                                                        </b>
                                                    </div>
                                                    <div class="aa-ItemContentDescription">
                                                        ${components.Highlight({hit: item, attribute: 'description'})}
                                                        ${item.category ? html`<p class="m-0"><span class="fa-solid fa-tags fa-fw"></span>${components.Highlight({hit: item, attribute: 'category'})}</p>` : ""}
                                                        ${item.footprint ? html`<p class="m-0"><span class="fa-solid fa-microchip fa-fw"></span>${components.Highlight({hit: item, attribute: 'footprint'})}</p>` : ""}
                                                    </div>
                                                </div>
                                            </div>
                                        </a>
                                    `;
                            },
                        },
                    },
                ];

                if (hasAssemblyDetailUrl) {
                    sources.push(
                        // Assemblies source (filtered from the same mixed endpoint results)
                        {
                            sourceId: 'assemblies',
                            getItems() {
                                return fetchMixedItems(query).then((items) =>
                                    items.filter((item) => item.type === "assembly")
                                );
                            },
                            getItemUrl({ item }) {
                                return assembly_detail_uri_template.replace('__ID__', item.id);
                            },
                            templates: {
                                header({ html }) {
                                    return html`<span class="aa-SourceHeaderTitle">${trans(STATISTICS_ASSEMBLIES)}</span>
                                            <div class="aa-SourceHeaderLine" />`;
                                },
                                item({ item, components, html }) {
                                    const details_url = assembly_detail_uri_template.replace('__ID__', item.id);

                                    return html`
                                            <a class="aa-ItemLink" href="${details_url}">
                                                <div class="aa-ItemContent">
                                                    <div class="aa-ItemIcon aa-ItemIcon--picture aa-ItemIcon--alignTop">
                                                        <img src="${item.image !== "" ? item.image : placeholder_image}" alt="${item.name}" width="30" height="30"/>
                                                    </div>
                                                    <div class="aa-ItemContentBody">
                                                        <div class="aa-ItemContentTitle">
                                                            <b>
                                                                ${components.Highlight({hit: item, attribute: 'name'})}
                                                            </b>
                                                        </div>
                                                        <div class="aa-ItemContentDescription">
                                                            ${components.Highlight({hit: item, attribute: 'description'})}
                                                        </div>
                                                    </div>
                                                </div>
                                            </a>
                                        `;
                                },
                            },
                        }
                    );
                }

                if (hasProjectDetailUrl) {
                    sources.push(
                        // Projects source (filtered from the same mixed endpoint results)
                        {
                            sourceId: 'projects',
                            getItems() {
                                return fetchMixedItems(query).then((items) =>
                                    items.filter((item) => item.type === "project")
                                );
                            },
                            getItemUrl({ item }) {
                                return project_detail_uri_template.replace('__ID__', item.id);
                            },
                            templates: {
                                header({ html }) {
                                    return html`<span class="aa-SourceHeaderTitle">${trans(STATISTICS_PROJECTS)}</span>
                                            <div class="aa-SourceHeaderLine" />`;
                                },
                                item({ item, components, html }) {
                                    const details_url = project_detail_uri_template.replace('__ID__', item.id);

                                    return html`
                                            <a class="aa-ItemLink" href="${details_url}">
                                                <div class="aa-ItemContent">
                                                    <div class="aa-ItemIcon aa-ItemIcon--picture aa-ItemIcon--alignTop">
                                                        <img src="${item.image !== "" ? item.image : placeholder_image}" alt="${item.name}" width="30" height="30"/>
                                                    </div>
                                                    <div class="aa-ItemContentBody">
                                                        <div class="aa-ItemContentTitle">
                                                            <b>
                                                                ${components.Highlight({hit: item, attribute: 'name'})}
                                                            </b>
                                                        </div>
                                                        <div class="aa-ItemContentDescription">
                                                            ${components.Highlight({hit: item, attribute: 'description'})}
                                                        </div>
                                                    </div>
                                                </div>
                                            </a>
                                        `;
                                },
                            },
                        }
                    );
                }

                return sources;
            },
        });

        //Try to find the input field and register a defocus handler. This is necessarry, as by default the autocomplete
        //lib has problems when multiple inputs are present on the page. (see https://github.com/algolia/autocomplete/issues/1216)
        const inputs = this.element.getElementsByClassName('aa-Input');
        for (const input of inputs) {
            input.addEventListener('blur', () => {
                this._autocomplete.setIsOpen(false);
            });
        }
    }
}