// ==UserScript==
// @name         RTBF Scrobbler v1.5
// @namespace    https://gitea.zoemp.be/SansGuidon
// @version      1.5
// @description  Auto-scrobble RTBF → Last.fm & ListenBrainz; config panel, error display, force-scrobble button
// @match        https://www.rtbf.be/radio/liveradio/*
// @grant        GM_xmlhttpRequest
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_registerMenuCommand
// @grant        GM_openInTab
// @run-at       document-idle
// @connect      ws.audioscrobbler.com
// @connect      api.listenbrainz.org
// @require      https://cdnjs.cloudflare.com/ajax/libs/blueimp-md5/2.19.0/js/md5.min.js
// ==/UserScript==

(function(){
    if (window.self !== window.top) return;
    'use strict';

    // Menu commands
    GM_registerMenuCommand('Scrobbler Config', showConfigPanel);

    // Config panel
    function showConfigPanel() {
        if (document.getElementById('scrobble-config')) return;
        const overlay = document.createElement('div');
        overlay.id = 'scrobble-config';
        Object.assign(overlay.style, {
            position:'fixed', top:0, left:0, right:0, bottom:0,
            background:'rgba(0,0,0,0.6)', zIndex:10000,
            display:'flex', alignItems:'center', justifyContent:'center'
        });
        const panel = document.createElement('div');
        Object.assign(panel.style, {
            background:'#fff', padding:'20px', borderRadius:'8px',
            width:'350px', boxShadow:'0 0 10px rgba(0,0,0,0.5)',
            fontFamily:'sans-serif', fontSize:'14px', color:'#333'
        });
        panel.innerHTML = `
            <h2 style="margin-top:0">Scrobbler Settings</h2>
            <p><a href="https://www.last.fm/api/account/create" target="_blank">Last.fm API App →</a></p>
            <label>API Key:<br><input id="cf-lfm-key" style="width:100%" value="${GM_getValue('lfm_apiKey','')}"/></label>
            <label>API Secret:<br><input id="cf-lfm-secret" style="width:100%" value="${GM_getValue('lfm_apiSecret','')}"/></label>
            <label>Session Key:<br><input id="cf-lfm-session" style="width:100%" value="${GM_getValue('lfm_sessionKey','')}"/></label>
            <button id="cf-gen-session" style="margin:6px 0">Generate LF Session Key</button>
            <p><a href="https://listenbrainz.org/settings" target="_blank">ListenBrainz Token →</a></p>
            <label>LB Token:<br><input id="cf-lb-token" style="width:100%" value="${GM_getValue('lb_token','')}"/></label>
            <div style="margin-top:10px; text-align:right">
                <button id="cf-force">Force Scrobble</button>
                <button id="cf-save">Save</button>
                <button id="cf-close">Close</button>
            </div>`;
        overlay.appendChild(panel);
        document.body.appendChild(overlay);

        panel.querySelector('#cf-close').onclick = () => overlay.remove();
        panel.querySelector('#cf-save').onclick = () => {
            GM_setValue('lfm_apiKey', panel.querySelector('#cf-lfm-key').value.trim());
            GM_setValue('lfm_apiSecret', panel.querySelector('#cf-lfm-secret').value.trim());
            GM_setValue('lfm_sessionKey', panel.querySelector('#cf-lfm-session').value.trim());
            GM_setValue('lb_token', panel.querySelector('#cf-lb-token').value.trim());
            alert('Settings saved');
            overlay.remove();
        };
        panel.querySelector('#cf-gen-session').onclick = generateSession;
        panel.querySelector('#cf-force').onclick = async () => {
            const track = await fetchTrack();
            const cfg = getCfg();
            if (track.artistName && cfg) await scrobble(track, cfg);
        };
    }

    // Generate Last.fm session key flow
    function generateSession(){
        const apiKey = GM_getValue('lfm_apiKey','').trim();
        const apiSecret = GM_getValue('lfm_apiSecret','').trim();
        if (!apiKey || !apiSecret) return ui('⚠ configure LF API first', false);
        const callback = 'http://localhost/';
        const authUrl = `https://www.last.fm/api/auth/?api_key=${apiKey}&cb=${encodeURIComponent(callback)}`;
        (typeof GM_openInTab==='function'? GM_openInTab(authUrl,{active:true}): window.open(authUrl,'_blank'));
        setTimeout(()=>{
            const token = prompt('Paste LAST.FM token from callback URL');
            if (!token) return;
            const sig = md5(`api_key${apiKey}methodauth.getSessiontoken${token}${apiSecret}`);
            const url = `https://ws.audioscrobbler.com/2.0/?method=auth.getSession&api_key=${apiKey}&token=${token}&api_sig=${sig}&format=json`;
            GM_xmlhttpRequest({ method:'GET', url,
                onload(res){
                    try {
                        const d = JSON.parse(res.responseText);
                        const sk = d.session.key;
                        GM_setValue('lfm_sessionKey', sk);
                        ui('✔ LF session saved', true);
                    } catch(e){ ui('⚠ session invalid', false); console.error(e); }
                }, onerror(err){ ui('⚠ network error', false); console.error(err); }
            });
        }, 500);
    }

    // UI indicator
    const container = document.querySelector('main')||document.body;
    if (container!==document.body) container.style.position='relative';
    const ind = document.createElement('div');
    Object.assign(ind.style,{
        position:container===document.body?'fixed':'absolute', bottom:'10px', right:'10px',
        padding:'6px 10px', background:'#555', color:'#fff', fontFamily:'monospace',
        fontSize:'12px', whiteSpace:'pre-wrap', borderRadius:'4px', zIndex:'9999'
    });
    ind.id='scrobble-indicator'; ind.textContent='idle';
    container.appendChild(ind);
    function ui(msg, ok=true){ ind.textContent=msg; ind.style.background=ok?'#27ae60':'#e74c3c'; }

    // Config fetch
    function getCfg(){
        const a=GM_getValue('lfm_apiKey','').trim();
        const s=GM_getValue('lfm_apiSecret','').trim();
        const k=GM_getValue('lfm_sessionKey','').trim();
        const l=GM_getValue('lb_token','').trim();
        if (!a||!s||!k||!l) { ui('⚠ not configured', false); return null; }
        return { apiKey:a, apiSecret:s, sk:k, lbToken:l };
    }

    // Fetch current track
    async function fetchTrack(){
        const cfg = JSON.parse(document.body.dataset.config||'{}');
        const id = cfg.v2Config && cfg.v2Config.id;
        if (!id) throw 'no config';
        const res = await fetch(`https://core-search.radioplayer.cloud/056/qp/v4/events/?rpId=${id}`);
        if (!res.ok) throw res.status;
        const { results:{previous=[], now} } = await res.json();
        return [...previous, now].pop()||{};
    }

    // XHR helper
    function gmReq(o){ return new Promise((rs,rj)=> GM_xmlhttpRequest(Object.assign(o,{ onload:x=>rs(x), onerror:e=>rj(e) })) ); }
    async function post(url, opts){ const x = await gmReq(Object.assign({url,method:'POST'},opts)); return {status:x.status,text:x.responseText}; }

    // Scrobble
    async function scrobble(track, cfg){
        const art=track.artistName, nm=track.name, ts=Math.floor(Date.now()/1e3);
        ui(`▶ ${art} – ${nm}`);
        // Last.fm
        const p={method:'track.scrobble',api_key:cfg.apiKey,artist:art,track:nm,album:'',timestamp:ts,sk:cfg.sk};
        const sig=md5(Object.keys(p).sort().map(k=>k+p[k]).join('')+cfg.apiSecret);
        const body=Object.entries({...p,api_sig:sig,format:'json'}).map(([k,v])=>`${k}=${encodeURIComponent(v)}`).join('&');
        const lf = await post('https://ws.audioscrobbler.com/2.0/',{headers:{'Content-Type':'application/x-www-form-urlencoded'},data:body});
        console.log('[LF]',lf.status,lf.text);
        if (lf.status===403) { ui('⚠ invalid LF session', false); setTimeout(showConfigPanel,300); return; }
        ui(`Last.fm: ${lf.status}`);
        // LB
        const payload={listen_type:'single',payload:[{track_metadata:{artist_name:art,track_name:nm},listened_at:ts}]};
        const lb = await post('https://api.listenbrainz.org/1/submit-listens',{headers:{'Content-Type':'application/json','Authorization':'Token '+cfg.lbToken},data:JSON.stringify(payload)});
        console.log('[LB]',lb.status,lb.text);
        ui(`LF:${lf.status}  LB:${lb.status}`, lb.status===200);
    }

    // Playback check
    function isPlaying(){ const a=document.querySelector('audio'); return a&&!a.paused; }
    let last=GM_getValue('lastTrack','');
    setInterval(async ()=>{
        const cfg=getCfg(); if(!cfg) return;
        let tr;
        try{ tr=await fetchTrack(); } catch(e){ ui('⚠ fetch error',false); console.error(e); return; }
        if(!tr.artistName){ ui('⏹ no track'); return; }
        if(!isPlaying()){ ui('⏸ paused'); return; }
        const title=`${tr.artistName} – ${tr.name}`;
        if(title===last){ ui('⏳ waiting'); return; }
        last=title; GM_setValue('lastTrack', last);
        await scrobble(tr, cfg);
    },15000);
})();