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

    uBlock Origin Lite - a comprehensive, MV3-compliant content blocker
    Copyright (C) 2014-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

*/

// ruleset: spa-1

// Important!
// Isolate from global scope

// Start of local scope
(function uBOL_m3uPrune() {

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

function m3uPrune(
    m3uPattern = '',
    urlPattern = ''
) {
    if ( typeof m3uPattern !== 'string' ) { return; }
    const safe = safeSelf();
    const logPrefix = safe.makeLogPrefix('m3u-prune', m3uPattern, urlPattern);
    const toLog = [];
    const regexFromArg = arg => {
        if ( arg === '' ) { return /^/; }
        const match = /^\/(.+)\/([gms]*)$/.exec(arg);
        if ( match !== null ) {
            let flags = match[2] || '';
            if ( flags.includes('m') ) { flags += 's'; }
            return new RegExp(match[1], flags);
        }
        return new RegExp(
            arg.replace(/[.+?^${}()|[\]\\]/g, '\\$&').replace(/\*+/g, '.*?')
        );
    };
    const reM3u = regexFromArg(m3uPattern);
    const reUrl = regexFromArg(urlPattern);
    const pruneSpliceoutBlock = (lines, i) => {
        if ( lines[i].startsWith('#EXT-X-CUE:TYPE="SpliceOut"') === false ) {
            return false;
        }
        toLog.push(`\t${lines[i]}`);
        lines[i] = undefined; i += 1;
        if ( lines[i].startsWith('#EXT-X-ASSET:CAID') ) {
            toLog.push(`\t${lines[i]}`);
            lines[i] = undefined; i += 1;
        }
        if ( lines[i].startsWith('#EXT-X-SCTE35:') ) {
            toLog.push(`\t${lines[i]}`);
            lines[i] = undefined; i += 1;
        }
        if ( lines[i].startsWith('#EXT-X-CUE-IN') ) {
            toLog.push(`\t${lines[i]}`);
            lines[i] = undefined; i += 1;
        }
        if ( lines[i].startsWith('#EXT-X-SCTE35:') ) {
            toLog.push(`\t${lines[i]}`);
            lines[i] = undefined; i += 1;
        }
        return true;
    };
    const pruneInfBlock = (lines, i) => {
        if ( lines[i].startsWith('#EXTINF') === false ) { return false; }
        if ( reM3u.test(lines[i+1]) === false ) { return false; }
        toLog.push('Discarding', `\t${lines[i]}, \t${lines[i+1]}`);
        lines[i] = lines[i+1] = undefined; i += 2;
        if ( lines[i].startsWith('#EXT-X-DISCONTINUITY') ) {
            toLog.push(`\t${lines[i]}`);
            lines[i] = undefined; i += 1;
        }
        return true;
    };
    const pruner = text => {
        if ( (/^\s*#EXTM3U/.test(text)) === false ) { return text; }
        if ( m3uPattern === '' ) {
            safe.uboLog(` Content:\n${text}`);
            return text;
        }
        if ( reM3u.multiline ) {
            reM3u.lastIndex = 0;
            for (;;) {
                const match = reM3u.exec(text);
                if ( match === null ) { break; }
                let discard = match[0];
                let before = text.slice(0, match.index);
                if (
                    /^[\n\r]+/.test(discard) === false &&
                    /[\n\r]+$/.test(before) === false
                ) {
                    const startOfLine = /[^\n\r]+$/.exec(before);
                    if ( startOfLine !== null ) {
                        before = before.slice(0, startOfLine.index);
                        discard = startOfLine[0] + discard;
                    }
                }
                let after = text.slice(match.index + match[0].length);
                if (
                    /[\n\r]+$/.test(discard) === false &&
                    /^[\n\r]+/.test(after) === false
                ) {
                    const endOfLine = /^[^\n\r]+/.exec(after);
                    if ( endOfLine !== null ) {
                        after = after.slice(endOfLine.index);
                        discard += discard + endOfLine[0];
                    }
                }
                text = before.trim() + '\n' + after.trim();
                reM3u.lastIndex = before.length + 1;
                toLog.push('Discarding', ...safe.String_split.call(discard, /\n+/).map(s => `\t${s}`));
                if ( reM3u.global === false ) { break; }
            }
            return text;
        }
        const lines = safe.String_split.call(text, /\n\r|\n|\r/);
        for ( let i = 0; i < lines.length; i++ ) {
            if ( lines[i] === undefined ) { continue; }
            if ( pruneSpliceoutBlock(lines, i) ) { continue; }
            if ( pruneInfBlock(lines, i) ) { continue; }
        }
        return lines.filter(l => l !== undefined).join('\n');
    };
    const urlFromArg = arg => {
        if ( typeof arg === 'string' ) { return arg; }
        if ( arg instanceof Request ) { return arg.url; }
        return String(arg);
    };
    proxyApplyFn('fetch', async function fetch(context) {
        const args = context.callArgs;
        const fetchPromise = context.reflect();
        if ( reUrl.test(urlFromArg(args[0])) === false ) { return fetchPromise; }
        const responseBefore = await fetchPromise;
        const responseClone = responseBefore.clone();
        const textBefore = await responseClone.text();
        const textAfter = pruner(textBefore);
        if ( textAfter === textBefore ) { return responseBefore; }
        const responseAfter = new Response(textAfter, {
            status: responseBefore.status,
            statusText: responseBefore.statusText,
            headers: responseBefore.headers,
        });
        Object.defineProperties(responseAfter, {
            url: { value: responseBefore.url },
            type: { value: responseBefore.type },
        });
        if ( toLog.length !== 0 ) {
            toLog.unshift(logPrefix);
            safe.uboLog(toLog.join('\n'));
        }
        return responseAfter;
    })
    self.XMLHttpRequest.prototype.open = new Proxy(self.XMLHttpRequest.prototype.open, {
        apply: async (target, thisArg, args) => {
            if ( reUrl.test(urlFromArg(args[1])) === false ) {
                return Reflect.apply(target, thisArg, args);
            }
            thisArg.addEventListener('readystatechange', function() {
                if ( thisArg.readyState !== 4 ) { return; }
                const type = thisArg.responseType;
                if ( type !== '' && type !== 'text' ) { return; }
                const textin = thisArg.responseText;
                const textout = pruner(textin);
                if ( textout === textin ) { return; }
                Object.defineProperty(thisArg, 'response', { value: textout });
                Object.defineProperty(thisArg, 'responseText', { value: textout });
                if ( toLog.length !== 0 ) {
                    toLog.unshift(logPrefix);
                    safe.uboLog(toLog.join('\n'));
                }
            });
            return Reflect.apply(target, thisArg, args);
        }
    });
}

function proxyApplyFn(
    target = '',
    handler = ''
) {
    let context = globalThis;
    let prop = target;
    for (;;) {
        const pos = prop.indexOf('.');
        if ( pos === -1 ) { break; }
        context = context[prop.slice(0, pos)];
        if ( context instanceof Object === false ) { return; }
        prop = prop.slice(pos+1);
    }
    const fn = context[prop];
    if ( typeof fn !== 'function' ) { return; }
    if ( proxyApplyFn.CtorContext === undefined ) {
        proxyApplyFn.ctorContexts = [];
        proxyApplyFn.CtorContext = class {
            constructor(...args) {
                this.init(...args);
            }
            init(callFn, callArgs) {
                this.callFn = callFn;
                this.callArgs = callArgs;
                return this;
            }
            reflect() {
                const r = Reflect.construct(this.callFn, this.callArgs);
                this.callFn = this.callArgs = this.private = undefined;
                proxyApplyFn.ctorContexts.push(this);
                return r;
            }
            static factory(...args) {
                return proxyApplyFn.ctorContexts.length !== 0
                    ? proxyApplyFn.ctorContexts.pop().init(...args)
                    : new proxyApplyFn.CtorContext(...args);
            }
        };
        proxyApplyFn.applyContexts = [];
        proxyApplyFn.ApplyContext = class {
            constructor(...args) {
                this.init(...args);
            }
            init(callFn, thisArg, callArgs) {
                this.callFn = callFn;
                this.thisArg = thisArg;
                this.callArgs = callArgs;
                return this;
            }
            reflect() {
                const r = Reflect.apply(this.callFn, this.thisArg, this.callArgs);
                this.callFn = this.thisArg = this.callArgs = this.private = undefined;
                proxyApplyFn.applyContexts.push(this);
                return r;
            }
            static factory(...args) {
                return proxyApplyFn.applyContexts.length !== 0
                    ? proxyApplyFn.applyContexts.pop().init(...args)
                    : new proxyApplyFn.ApplyContext(...args);
            }
        };
        proxyApplyFn.isCtor = new Map();
    }
    if ( proxyApplyFn.isCtor.has(target) === false ) {
        proxyApplyFn.isCtor.set(target, fn.prototype?.constructor === fn);
    }
    const fnStr = fn.toString();
    const toString = (function toString() { return fnStr; }).bind(null);
    const proxyDetails = {
        apply(target, thisArg, args) {
            return handler(proxyApplyFn.ApplyContext.factory(target, thisArg, args));
        },
        get(target, prop) {
            if ( prop === 'toString' ) { return toString; }
            return Reflect.get(target, prop);
        },
    };
    if ( proxyApplyFn.isCtor.get(target) ) {
        proxyDetails.construct = function(target, args) {
            return handler(proxyApplyFn.CtorContext.factory(target, args));
        };
    }
    context[prop] = new Proxy(fn, proxyDetails);
}

function safeSelf() {
    if ( scriptletGlobals.safeSelf ) {
        return scriptletGlobals.safeSelf;
    }
    const self = globalThis;
    const safe = {
        'Array_from': Array.from,
        'Error': self.Error,
        'Function_toStringFn': self.Function.prototype.toString,
        'Function_toString': thisArg => safe.Function_toStringFn.call(thisArg),
        'Math_floor': Math.floor,
        'Math_max': Math.max,
        'Math_min': Math.min,
        'Math_random': Math.random,
        'Object': Object,
        'Object_defineProperty': Object.defineProperty.bind(Object),
        'Object_defineProperties': Object.defineProperties.bind(Object),
        'Object_fromEntries': Object.fromEntries.bind(Object),
        'Object_getOwnPropertyDescriptor': Object.getOwnPropertyDescriptor.bind(Object),
        'Object_hasOwn': Object.hasOwn.bind(Object),
        'RegExp': self.RegExp,
        'RegExp_test': self.RegExp.prototype.test,
        'RegExp_exec': self.RegExp.prototype.exec,
        'Request_clone': self.Request.prototype.clone,
        'String': self.String,
        'String_fromCharCode': String.fromCharCode,
        'String_split': String.prototype.split,
        'XMLHttpRequest': self.XMLHttpRequest,
        'addEventListener': self.EventTarget.prototype.addEventListener,
        'removeEventListener': self.EventTarget.prototype.removeEventListener,
        'fetch': self.fetch,
        'JSON': self.JSON,
        'JSON_parseFn': self.JSON.parse,
        'JSON_stringifyFn': self.JSON.stringify,
        'JSON_parse': (...args) => safe.JSON_parseFn.call(safe.JSON, ...args),
        'JSON_stringify': (...args) => safe.JSON_stringifyFn.call(safe.JSON, ...args),
        'log': console.log.bind(console),
        // Properties
        logLevel: 0,
        // Methods
        makeLogPrefix(...args) {
            return this.sendToLogger && `[${args.join(' \u205D ')}]` || '';
        },
        uboLog(...args) {
            if ( this.sendToLogger === undefined ) { return; }
            if ( args === undefined || args[0] === '' ) { return; }
            return this.sendToLogger('info', ...args);
            
        },
        uboErr(...args) {
            if ( this.sendToLogger === undefined ) { return; }
            if ( args === undefined || args[0] === '' ) { return; }
            return this.sendToLogger('error', ...args);
        },
        escapeRegexChars(s) {
            return s.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
        },
        initPattern(pattern, options = {}) {
            if ( pattern === '' ) {
                return { matchAll: true, expect: true };
            }
            const expect = (options.canNegate !== true || pattern.startsWith('!') === false);
            if ( expect === false ) {
                pattern = pattern.slice(1);
            }
            const match = /^\/(.+)\/([gimsu]*)$/.exec(pattern);
            if ( match !== null ) {
                return {
                    re: new this.RegExp(
                        match[1],
                        match[2] || options.flags
                    ),
                    expect,
                };
            }
            if ( options.flags !== undefined ) {
                return {
                    re: new this.RegExp(this.escapeRegexChars(pattern),
                        options.flags
                    ),
                    expect,
                };
            }
            return { pattern, expect };
        },
        testPattern(details, haystack) {
            if ( details.matchAll ) { return true; }
            if ( details.re ) {
                return this.RegExp_test.call(details.re, haystack) === details.expect;
            }
            return haystack.includes(details.pattern) === details.expect;
        },
        patternToRegex(pattern, flags = undefined, verbatim = false) {
            if ( pattern === '' ) { return /^/; }
            const match = /^\/(.+)\/([gimsu]*)$/.exec(pattern);
            if ( match === null ) {
                const reStr = this.escapeRegexChars(pattern);
                return new RegExp(verbatim ? `^${reStr}$` : reStr, flags);
            }
            try {
                return new RegExp(match[1], match[2] || undefined);
            }
            catch {
            }
            return /^/;
        },
        getExtraArgs(args, offset = 0) {
            const entries = args.slice(offset).reduce((out, v, i, a) => {
                if ( (i & 1) === 0 ) {
                    const rawValue = a[i+1];
                    const value = /^\d+$/.test(rawValue)
                        ? parseInt(rawValue, 10)
                        : rawValue;
                    out.push([ a[i], value ]);
                }
                return out;
            }, []);
            return this.Object_fromEntries(entries);
        },
        onIdle(fn, options) {
            if ( self.requestIdleCallback ) {
                return self.requestIdleCallback(fn, options);
            }
            return self.requestAnimationFrame(fn);
        },
        offIdle(id) {
            if ( self.requestIdleCallback ) {
                return self.cancelIdleCallback(id);
            }
            return self.cancelAnimationFrame(id);
        }
    };
    scriptletGlobals.safeSelf = safe;
    if ( scriptletGlobals.bcSecret === undefined ) { return safe; }
    // This is executed only when the logger is opened
    safe.logLevel = scriptletGlobals.logLevel || 1;
    let lastLogType = '';
    let lastLogText = '';
    let lastLogTime = 0;
    safe.toLogText = (type, ...args) => {
        if ( args.length === 0 ) { return; }
        const text = `[${document.location.hostname || document.location.href}]${args.join(' ')}`;
        if ( text === lastLogText && type === lastLogType ) {
            if ( (Date.now() - lastLogTime) < 5000 ) { return; }
        }
        lastLogType = type;
        lastLogText = text;
        lastLogTime = Date.now();
        return text;
    };
    try {
        const bc = new self.BroadcastChannel(scriptletGlobals.bcSecret);
        let bcBuffer = [];
        safe.sendToLogger = (type, ...args) => {
            const text = safe.toLogText(type, ...args);
            if ( text === undefined ) { return; }
            if ( bcBuffer === undefined ) {
                return bc.postMessage({ what: 'messageToLogger', type, text });
            }
            bcBuffer.push({ type, text });
        };
        bc.onmessage = ev => {
            const msg = ev.data;
            switch ( msg ) {
            case 'iamready!':
                if ( bcBuffer === undefined ) { break; }
                bcBuffer.forEach(({ type, text }) =>
                    bc.postMessage({ what: 'messageToLogger', type, text })
                );
                bcBuffer = undefined;
                break;
            case 'setScriptletLogLevelToOne':
                safe.logLevel = 1;
                break;
            case 'setScriptletLogLevelToTwo':
                safe.logLevel = 2;
                break;
            }
        };
        bc.postMessage('areyouready?');
    } catch {
        safe.sendToLogger = (type, ...args) => {
            const text = safe.toLogText(type, ...args);
            if ( text === undefined ) { return; }
            safe.log(`uBO ${text}`);
        };
    }
    return safe;
}

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

const scriptletGlobals = {}; // eslint-disable-line
const argsList = [["type=ad",".m3u8"]];
const hostnamesMap = new Map([["vix.com",0]]);
const exceptionsMap = new Map([]);
const hasEntities = false;
const hasAncestors = false;

const collectArgIndices = (hn, map, out) => {
    let argsIndices = map.get(hn);
    if ( argsIndices === undefined ) { return; }
    if ( typeof argsIndices !== 'number' ) {
        for ( const argsIndex of argsIndices ) {
            out.add(argsIndex);
        }
    } else {
        out.add(argsIndices);
    }
};

const indicesFromHostname = (hostname, suffix = '') => {
    const hnParts = hostname.split('.');
    const hnpartslen = hnParts.length;
    if ( hnpartslen === 0 ) { return; }
    for ( let i = 0; i < hnpartslen; i++ ) {
        const hn = `${hnParts.slice(i).join('.')}${suffix}`;
        collectArgIndices(hn, hostnamesMap, todoIndices);
        collectArgIndices(hn, exceptionsMap, tonotdoIndices);
    }
    if ( hasEntities ) {
        const n = hnpartslen - 1;
        for ( let i = 0; i < n; i++ ) {
            for ( let j = n; j > i; j-- ) {
                const en = `${hnParts.slice(i,j).join('.')}.*${suffix}`;
                collectArgIndices(en, hostnamesMap, todoIndices);
                collectArgIndices(en, exceptionsMap, tonotdoIndices);
            }
        }
    }
};

const entries = (( ) => {
    const docloc = document.location;
    const origins = [ docloc.origin ];
    if ( docloc.ancestorOrigins ) {
        origins.push(...docloc.ancestorOrigins);
    }
    return origins.map((origin, i) => {
        const beg = origin.lastIndexOf('://');
        if ( beg === -1 ) { return; }
        const hn = origin.slice(beg+3)
        const end = hn.indexOf(':');
        return { hn: end === -1 ? hn : hn.slice(0, end), i };
    }).filter(a => a !== undefined);
})();
if ( entries.length === 0 ) { return; }

const todoIndices = new Set();
const tonotdoIndices = new Set();

indicesFromHostname(entries[0].hn);
if ( hasAncestors ) {
    for ( const entry of entries ) {
        if ( entry.i === 0 ) { continue; }
        indicesFromHostname(entry.hn, '>>');
    }
}

// Apply scriplets
for ( const i of todoIndices ) {
    if ( tonotdoIndices.has(i) ) { continue; }
    try { m3uPrune(...argsList[i]); }
    catch { }
}

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

// End of local scope
})();

void 0;
