import { Navigate, useLocation } from 'react-router';
import PageNotFound from '../common/lib/PageNotFound';
import type { MultiLang } from '../config';
import Functions from '../functions';

interface Props {
    lang: MultiLang;
}

const getRedirectUrl = (location: { pathname: string; search: string }): string => {
    {
        const pathname = location.pathname || '';
        const query = new URLSearchParams(location.search);
        const search = /^\/modules\/xoonips(?:\/+(.*))?$/;
        const matches = pathname.match(search);
        if (matches === null) {
            return '';
        }
        const path = matches[1] || '';
        switch (path) {
            case '':
            case 'index.php': {
                return '/database';
            }
            case 'detail.php': {
                const id = query.get('id');
                if (id !== null) {
                    return `/database/item/id/${Functions.escape(id)}`;
                }
                const itemId = query.get('item_id');
                if (itemId !== null && itemId.match(/^\d+$/) !== null) {
                    return `/database/item/${Functions.escape(itemId)}`;
                }
                return '';
            }
            case 'listitem.php': {
                const indexId = query.get('index_id');
                if (indexId !== null && indexId.match(/^\d+$/) !== null) {
                    const params = new URLSearchParams();
                    const map: Record<string, { key: string; isNumber: boolean }> = {
                        orderby: { key: 'orderby', isNumber: false },
                        order_dir: { key: 'order_dir', isNumber: true },
                        itemcount: { key: 'itemcount', isNumber: true },
                        page: { key: 'page', isNumber: true },
                    };
                    for (const k in map) {
                        const v = query.get(k);
                        if (v === null || v.length === 0) {
                            continue;
                        }
                        if (map[k].isNumber && v.match(/^\d+$/) !== null) {
                            continue;
                        }
                        params.set(map[k].key, v);
                    }
                    const paramStr = params.toString();
                    return `/database/list/${Functions.escape(indexId)}${paramStr.length > 0 ? `?${paramStr}` : ''}`;
                }
                break;
            }
            case 'itemselect.php': {
                const op = query.get('op');
                if (op === null) {
                    break;
                }
                switch (op) {
                    case 'quicksearch': {
                        const keyword = query.get('keyword');
                        const itemType = query.get('search_itemtype');
                        if (keyword === null || itemType === null || keyword === '') {
                            return '';
                        }
                        const type = itemType.replace('xnp', '');
                        if (itemType !== 'basic' && itemType !== 'all' && itemType.match(/^xnp.+/) === null) {
                            return '';
                        }
                        const params = new URLSearchParams({ type, keyword });
                        const map: Record<string, { key: string; isNumber: boolean }> = {
                            orderby: { key: 'orderby', isNumber: false },
                            orderdir: { key: 'order_dir', isNumber: true },
                            item_per_page: { key: 'itemcount', isNumber: true },
                            page: { key: 'page', isNumber: true },
                        };
                        for (const k in map) {
                            const v = query.get(k);
                            if (v === null || v.length === 0) {
                                continue;
                            }
                            if (map[k].isNumber && v.match(/^\d+$/) !== null) {
                                continue;
                            }
                            params.set(map[k].key, v);
                        }
                        return `/database/search?${params.toString()}`;
                    }
                    case 'itemtypesearch': {
                        const itemType = query.get('search_itemtype');
                        if (itemType === null || itemType.match(/^xnp.+/) === null) {
                            return '';
                        }
                        const type = itemType.replace('xnp', '');
                        return `/database/search/itemtype/${Functions.escape(type)}`;
                    }
                    case 'itemsubtypesearch': {
                        let type = '';
                        let subtype = '';
                        query.forEach((v, k) => {
                            if (k.match(/^xnp[a-z]+$/) !== null && v) {
                                type = k.replace('xnp', '');
                                return;
                            }
                        });
                        if (type === '') {
                            return '';
                        }
                        query.forEach((v, k) => {
                            if (k.match(`^xnp${type}_.+$`) !== null && v) {
                                subtype = v;
                                return;
                            }
                        });
                        if (subtype === '') {
                            return '';
                        }
                        return `/database/search/itemtype/${Functions.escape(type)}/${Functions.escape(subtype)}`;
                    }
                }
                return '';
            }
            case 'advanced_search.php': {
                return '/database/advanced';
            }
        }
        return '';
    }
};

const DatabaseXoopsPathRedirect = (props: Props) => {
    const { lang } = props;
    const location = useLocation();
    const url = getRedirectUrl(location);
    if (url === '') {
        return <PageNotFound lang={lang} />;
    }
    return <Navigate to={url} replace />;
};

export default DatabaseXoopsPathRedirect;