/*******************************************************************************

    uBlock Origin - a comprehensive, efficient content blocker
    Copyright (C) 2025-present Raymond Hill

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see {http://www.gnu.org/licenses/}.

    Home: https://github.com/gorhill/uBlock
*/

export function patchRuleset(ruleset) {
    const out = [];
    for ( const rule of ruleset ) {
        const condition = rule.condition;
        if ( rule.action.type === 'modifyHeaders' ) { continue; }
        if ( Array.isArray(rule.condition.responseHeaders) ) { continue; }
        if ( Array.isArray(condition.requestMethods) ) { continue; }
        if ( Array.isArray(condition.excludedRequestMethods) ) { continue; }
        if ( Array.isArray(condition.initiatorDomains) ) {
            condition.domains = condition.initiatorDomains;
            delete condition.initiatorDomains;
        }
        if ( Array.isArray(condition.excludedInitiatorDomains) ) {
            condition.excludedDomains = condition.excludedInitiatorDomains;
            delete condition.excludedInitiatorDomains;
        }
        // https://github.com/uBlockOrigin/uBOL-home/issues/434
        let { urlFilter } = condition;
        if ( urlFilter?.endsWith('^') ) {
            urlFilter = urlFilter.slice(0, -1);
            const match = /^(.*?\/\/|\|\|)/.exec(urlFilter);
            const pattern = match
                ? urlFilter.slice(match[0].length)
                : urlFilter;
            if ( /[^\w.%*-]/.test(pattern) ) {
                const extra = structuredClone(rule);
                extra.condition.urlFilter = `${urlFilter}|`;
                out.push(extra);
                console.log(`Patching to ${extra.condition.urlFilter}`);
            }
        }
        out.push(rule);
    }
    return out;
}