import { useState, useEffect, useCallback, useRef } from 'react';
import ReactDOM from 'react-dom';
import { api } from '../utils/api.js';
import { useToast } from '../contexts/ToastContext.jsx';
import { useAuth } from '../contexts/AuthContext.jsx';

// ── Utilities ─────────────────────────────────────────────────────────────────
const DAYS        = ['Sun','Mon','Tue','Wed','Thu','Fri','Sat'];
const MONTHS      = ['January','February','March','April','May','June','July','August','September','October','November','December'];
const SHORT_MONTHS= ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'];

function fmtDate(d)    { return `${d.getDate()} ${SHORT_MONTHS[d.getMonth()]} ${d.getFullYear()}`; }
function fmtTime(iso)  { if(!iso) return ''; const d=new Date(iso); return d.toLocaleTimeString([],{hour:'2-digit',minute:'2-digit'}); }
function fmtRange(s,e) { return `${fmtTime(s)} – ${fmtTime(e)}`; }
function toDateIn(iso) { return iso?iso.slice(0,10):''; }
function toTimeIn(iso) { if(!iso) return ''; const d=new Date(iso); const h=String(d.getHours()).padStart(2,'0'), m=d.getMinutes()<30?'00':'30'; return `${h}:${m}`; }
function buildISO(d,t) { return d&&t?`${d}T${t}:00`:''; }
function addHours(iso,h){ const d=new Date(iso); d.setMinutes(d.getMinutes()+h*60); return d.toISOString().slice(0,19); }
function sameDay(a,b)  { return a.getFullYear()===b.getFullYear()&&a.getMonth()===b.getMonth()&&a.getDate()===b.getDate(); }
function weekStart(d)  { const r=new Date(d); r.setDate(d.getDate()-d.getDay()); r.setHours(0,0,0,0); return r; }
function daysInMonth(y,m){ return new Date(y,m+1,0).getDate(); }

const RESP_LABEL = { going:'Going', maybe:'Maybe', not_going:'Not Going' };
const RESP_COLOR = { going:'#22c55e', maybe:'#f59e0b', not_going:'#ef4444' };

// 30-minute time slots
const TIME_SLOTS = (() => {
  const s=[];
  for(let h=0;h<24;h++) for(let m of [0,30]) {
    const hh=String(h).padStart(2,'0'), mm=String(m).padStart(2,'0');
    const disp=`${h===0?12:h>12?h-12:h}:${mm} ${h<12?'AM':'PM'}`;
    s.push({value:`${hh}:${mm}`,label:disp});
  }
  return s;
})();

// ── Mini Calendar (desktop) ───────────────────────────────────────────────────
function MiniCalendar({ selected, onChange, eventDates=new Set() }) {
  const [cur, setCur] = useState(()=>{ const d=new Date(selected||Date.now()); d.setDate(1); return d; });
  const y=cur.getFullYear(), m=cur.getMonth(), first=new Date(y,m,1).getDay(), total=daysInMonth(y,m), today=new Date();
  const cells=[]; for(let i=0;i<first;i++) cells.push(null); for(let d=1;d<=total;d++) cells.push(d);
  return (
    <div style={{userSelect:'none'}}>
      <div style={{display:'flex',alignItems:'center',justifyContent:'space-between',marginBottom:8,fontSize:13,fontWeight:600}}>
        <button style={{background:'none',border:'none',cursor:'pointer',padding:'2px 8px',color:'var(--text-secondary)',fontSize:16}} onClick={()=>{const n=new Date(cur);n.setMonth(m-1);setCur(n);}}>‹</button>
        <span>{MONTHS[m]} {y}</span>
        <button style={{background:'none',border:'none',cursor:'pointer',padding:'2px 8px',color:'var(--text-secondary)',fontSize:16}} onClick={()=>{const n=new Date(cur);n.setMonth(m+1);setCur(n);}}>›</button>
      </div>
      <div style={{display:'grid',gridTemplateColumns:'repeat(7,1fr)',gap:1,fontSize:11}}>
        {DAYS.map(d=><div key={d} style={{textAlign:'center',fontWeight:600,color:'var(--text-tertiary)',padding:'2px 0'}}>{d[0]}</div>)}
        {cells.map((d,i)=>{
          if(!d) return <div key={i}/>;
          const date=new Date(y,m,d), isSel=selected&&sameDay(date,new Date(selected)), isToday=sameDay(date,today);
          const key=`${y}-${String(m+1).padStart(2,'0')}-${String(d).padStart(2,'0')}`;
          return (
            <div key={i} onClick={()=>onChange(date)} style={{textAlign:'center',padding:'3px 2px',borderRadius:4,cursor:'pointer',background:isSel?'var(--primary)':'transparent',color:isSel?'white':isToday?'var(--primary)':'var(--text-primary)',fontWeight:isToday?700:400,position:'relative'}}>
              {d}
              {eventDates.has(key)&&!isSel&&<span style={{position:'absolute',bottom:1,left:'50%',transform:'translateX(-50%)',width:4,height:4,borderRadius:'50%',background:'var(--primary)',display:'block'}}/>}
            </div>
          );
        })}
      </div>
    </div>
  );
}

// ── Mobile Date Picker (accordion month view) ─────────────────────────────────
function MobileDatePicker({ selected, onChange, eventDates=new Set() }) {
  const [open, setOpen] = useState(false);
  const [cur, setCur] = useState(()=>{ const d=new Date(selected||Date.now()); d.setDate(1); return d; });
  const y=cur.getFullYear(), m=cur.getMonth(), first=new Date(y,m,1).getDay(), total=daysInMonth(y,m);
  const cells=[]; for(let i=0;i<first;i++) cells.push(null); for(let d=1;d<=total;d++) cells.push(d);
  const today=new Date();
  return (
    <div style={{borderBottom:'1px solid var(--border)',background:'var(--surface)'}}>
      <button onClick={()=>setOpen(v=>!v)} style={{display:'flex',alignItems:'center',justifyContent:'space-between',width:'100%',padding:'10px 16px',background:'none',border:'none',cursor:'pointer',fontSize:14,fontWeight:600,color:'var(--text-primary)'}}>
        <span>{MONTHS[m]} {y}</span>
        <span style={{fontSize:10,transform:open?'rotate(180deg)':'none',display:'inline-block',transition:'transform 0.2s'}}>▼</span>
      </button>
      {open && (
        <div style={{padding:'8px 12px 12px',userSelect:'none'}}>
          <div style={{display:'flex',alignItems:'center',justifyContent:'space-between',marginBottom:8}}>
            <button style={{background:'none',border:'none',cursor:'pointer',padding:'4px 10px',fontSize:16,color:'var(--text-secondary)'}} onClick={()=>{const n=new Date(cur);n.setMonth(m-1);setCur(n);}}>‹</button>
            <button style={{background:'none',border:'none',cursor:'pointer',padding:'4px 10px',fontSize:16,color:'var(--text-secondary)'}} onClick={()=>{const n=new Date(cur);n.setMonth(m+1);setCur(n);}}>›</button>
          </div>
          <div style={{display:'grid',gridTemplateColumns:'repeat(7,1fr)',gap:2,fontSize:12}}>
            {DAYS.map(d=><div key={d} style={{textAlign:'center',fontWeight:600,color:'var(--text-tertiary)',padding:'2px 0'}}>{d[0]}</div>)}
            {cells.map((d,i)=>{
              if(!d) return <div key={i}/>;
              const date=new Date(y,m,d), isSel=selected&&sameDay(date,new Date(selected)), isToday=sameDay(date,today);
              const key=`${y}-${String(m+1).padStart(2,'0')}-${String(d).padStart(2,'0')}`;
              return (
                <div key={i} onClick={()=>{onChange(date);setOpen(false);}} style={{textAlign:'center',padding:'5px 2px',borderRadius:4,cursor:'pointer',background:isSel?'var(--primary)':'transparent',color:isSel?'white':isToday?'var(--primary)':'var(--text-primary)',fontWeight:isToday?700:400,position:'relative'}}>
                  {d}
                  {eventDates.has(key)&&!isSel&&<span style={{position:'absolute',bottom:2,left:'50%',transform:'translateX(-50%)',width:4,height:4,borderRadius:'50%',background:'var(--primary)',display:'block'}}/>}
                </div>
              );
            })}
          </div>
        </div>
      )}
    </div>
  );
}

// ── Event Type Popup ──────────────────────────────────────────────────────────
function EventTypePopup({ userGroups, onSave, onClose, editing=null }) {
  const toast=useToast();
  const DUR=[1,1.5,2,2.5,3,3.5,4,4.5,5];
  const [name,setName]=useState(editing?.name||'');
  const [colour,setColour]=useState(editing?.colour||'#6366f1');
  const [groupId,setGroupId]=useState(editing?.default_user_group_id||'');
  const [dur,setDur]=useState(editing?.default_duration_hrs||1);
  const [useDur,setUseDur]=useState(!!(editing?.default_duration_hrs));
  const [saving,setSaving]=useState(false);
  const handle=async()=>{
    if(!name.trim()) return toast('Name required','error');
    setSaving(true);
    try{const body={name:name.trim(),colour,defaultUserGroupId:groupId||null,defaultDurationHrs:useDur?dur:null};const r=editing?await api.updateEventType(editing.id,body):await api.createEventType(body);onSave(r.eventType);onClose();}catch(e){toast(e.message,'error');}finally{setSaving(false);}
  };
  return (
    <div style={{position:'absolute',top:'100%',left:0,zIndex:300,background:'var(--surface)',border:'1px solid var(--border)',borderRadius:'var(--radius)',padding:16,width:270,boxShadow:'0 4px 20px rgba(0,0,0,0.2)'}}>
      <div style={{marginBottom:8}}><label className="settings-section-label">Name</label><input className="input" value={name} onChange={e=>setName(e.target.value)} style={{marginTop:4}} autoFocus/></div>
      <div style={{marginBottom:8}}><label className="settings-section-label">Colour</label><input type="color" value={colour} onChange={e=>setColour(e.target.value)} style={{marginTop:4,width:'100%',height:32,padding:2,borderRadius:4,border:'1px solid var(--border)'}}/></div>
      <div style={{marginBottom:8}}><label className="settings-section-label">Default Group</label><select className="input" value={groupId} onChange={e=>setGroupId(e.target.value)} style={{marginTop:4}}><option value="">None</option>{userGroups.map(g=><option key={g.id} value={g.id}>{g.name}</option>)}</select></div>
      <div style={{marginBottom:12}}>
        <label style={{display:'flex',alignItems:'center',gap:8,fontSize:13,cursor:'pointer'}}><input type="checkbox" checked={useDur} onChange={e=>setUseDur(e.target.checked)}/> Set default duration</label>
        {useDur&&<select className="input" value={dur} onChange={e=>setDur(Number(e.target.value))} style={{marginTop:6}}>{DUR.map(d=><option key={d} value={d}>{d}hr{d!==1?'s':''}</option>)}</select>}
      </div>
      <div style={{display:'flex',gap:8}}><button className="btn btn-primary btn-sm" onClick={handle} disabled={saving}>{saving?'…':'Save'}</button><button className="btn btn-secondary btn-sm" onClick={onClose}>Cancel</button></div>
    </div>
  );
}

// ── Event Form ────────────────────────────────────────────────────────────────
function EventForm({ event, userGroups, eventTypes, selectedDate, onSave, onCancel, onDelete, isToolManager }) {
  const toast=useToast();
  const def=selectedDate?selectedDate.toISOString().slice(0,10):new Date().toISOString().slice(0,10);
  const [title,setTitle]=useState(event?.title||'');
  const [typeId,setTypeId]=useState(event?.event_type_id||'');
  const [sd,setSd]=useState(event?toDateIn(event.start_at):def);
  const [st,setSt]=useState(event?toTimeIn(event.start_at):'09:00');
  const [ed,setEd]=useState(event?toDateIn(event.end_at):def);
  const [et,setEt]=useState(event?toTimeIn(event.end_at):'10:00');
  const [allDay,setAllDay]=useState(!!event?.all_day);
  const [loc,setLoc]=useState(event?.location||'');
  const [desc,setDesc]=useState(event?.description||'');
  const [pub,setPub]=useState(event?!!event.is_public:true);
  const [track,setTrack]=useState(!!event?.track_availability);
  const [grps,setGrps]=useState(new Set((event?.user_groups||[]).map(g=>g.id)));
  const [saving,setSaving]=useState(false);
  const [showTypeForm,setShowTypeForm]=useState(false);
  const [localTypes,setLocalTypes]=useState(eventTypes);
  const typeRef=useRef(null);

  // Auto end time when type changes (only for new events)
  useEffect(()=>{
    if(!typeId||event) return;
    const typ=localTypes.find(t=>t.id===Number(typeId));
    if(!typ?.default_duration_hrs||!sd||!st) return;
    const start=buildISO(sd,st);
    setEd(toDateIn(addHours(start,typ.default_duration_hrs)));
    setEt(toTimeIn(addHours(start,typ.default_duration_hrs)));
    if(typ.default_user_group_id) setGrps(prev=>new Set([...prev,Number(typ.default_user_group_id)]));
  },[typeId]);

  // Auto-match end date to start date when start date changes
  useEffect(()=>{
    if(!event) setEd(sd);
  },[sd]);

  const toggleGrp=id=>setGrps(prev=>{const n=new Set(prev);n.has(id)?n.delete(id):n.add(id);return n;});
  const groupsRequired=track; // when tracking, groups are required

  const handle=async()=>{
    if(!title.trim()) return toast('Title required','error');
    if(!allDay&&(!sd||!st||!ed||!et)) return toast('Start and end required','error');
    if(groupsRequired&&grps.size===0) return toast('Select at least one group for availability tracking','error');
    setSaving(true);
    try{const body={title:title.trim(),eventTypeId:typeId||null,startAt:allDay?`${sd}T00:00:00`:buildISO(sd,st),endAt:allDay?`${ed}T23:59:59`:buildISO(ed,et),allDay,location:loc,description:desc,isPublic:pub,trackAvailability:track,userGroupIds:[...grps]};const r=event?await api.updateEvent(event.id,body):await api.createEvent(body);onSave(r.event);}catch(e){toast(e.message,'error');}finally{setSaving(false);}
  };

  const Row=({label,children,required})=>(
    <div style={{display:'flex',alignItems:'flex-start',gap:0,marginBottom:16}}>
      <div style={{width:120,flexShrink:0,fontSize:13,color:'var(--text-tertiary)',paddingTop:9,paddingRight:16,textAlign:'right',whiteSpace:'nowrap'}}>
        {label}{required&&<span style={{color:'var(--error)'}}> *</span>}
      </div>
      <div style={{flex:1,minWidth:0}}>{children}</div>
    </div>
  );

  return (
    <div style={{width:'100%',maxWidth:1024,overflowX:'auto'}}>
      <div style={{minWidth:500}}>
        {/* Title */}
        <div style={{marginBottom:20}}>
          <input className="input" placeholder="Add title" value={title} onChange={e=>setTitle(e.target.value)}
            style={{fontSize:20,fontWeight:700,border:'none',borderBottom:'2px solid var(--border)',borderRadius:0,padding:'4px 0',background:'transparent',width:'100%'}}/>
        </div>

        {/* Availability (first — if enabled, groups become required) */}
        <Row label="Availability">
          <label style={{display:'flex',alignItems:'center',gap:10,fontSize:13,cursor:'pointer',paddingTop:6}}>
            <input type="checkbox" checked={track} onChange={e=>{setTrack(e.target.checked);if(!e.target.checked) setPub(true);}}/>
            Track availability for assigned groups
          </label>
        </Row>

        {/* Groups — required when tracking */}
        <Row label="Groups" required={groupsRequired}>
          <div>
            <div style={{border:`1px solid ${groupsRequired&&grps.size===0?'var(--error)':'var(--border)'}`,borderRadius:'var(--radius)',overflow:'hidden',maxHeight:160,overflowY:'auto'}}>
              {userGroups.length===0
                ?<div style={{padding:'10px 14px',fontSize:13,color:'var(--text-tertiary)'}}>No user groups yet</div>
                :userGroups.map(g=>(
                  <label key={g.id} style={{display:'flex',alignItems:'center',gap:10,padding:'7px 12px',borderBottom:'1px solid var(--border)',cursor:'pointer',fontSize:13}}>
                    <input type="checkbox" checked={grps.has(g.id)} onChange={()=>toggleGrp(g.id)} style={{accentColor:'var(--primary)'}}/>
                    {g.name}
                  </label>
                ))}
            </div>
            <p style={{fontSize:11,color:groupsRequired&&grps.size===0?'var(--error)':'var(--text-tertiary)',marginTop:4}}>
              {grps.size===0
                ? (groupsRequired?'At least one group required for availability tracking':'No groups — event visible to all (if public)')
                : `${grps.size} group${grps.size!==1?'s':''} selected`}
            </p>
          </div>
        </Row>

        {/* Visibility — only shown if groups selected OR tracking */}
        {(grps.size>0||track) && (
          <Row label="Visibility">
            <label style={{display:'flex',alignItems:'center',gap:10,fontSize:13,cursor:'pointer',paddingTop:6}}>
              <input type="checkbox" checked={!pub} onChange={e=>setPub(!e.target.checked)}/>
              Viewable by selected groups only (private)
            </label>
          </Row>
        )}

        {/* Date/Time */}
        <Row label="Date & Time">
          <div style={{display:'flex',flexDirection:'column',gap:8}}>
            <div style={{display:'flex',alignItems:'center',gap:8,flexWrap:'nowrap'}}>
              <input type="date" className="input" value={sd} onChange={e=>setSd(e.target.value)} style={{width:150,flexShrink:0}}/>
              {!allDay&&(
                <>
                  <select className="input" value={st} onChange={e=>setSt(e.target.value)} style={{width:120,flexShrink:0}}>
                    {TIME_SLOTS.map(s=><option key={s.value} value={s.value}>{s.label}</option>)}
                  </select>
                  <span style={{color:'var(--text-tertiary)',fontSize:13,flexShrink:0}}>to</span>
                  <select className="input" value={et} onChange={e=>setEt(e.target.value)} style={{width:120,flexShrink:0}}>
                    {TIME_SLOTS.map(s=><option key={s.value} value={s.value}>{s.label}</option>)}
                  </select>
                  <input type="date" className="input" value={ed} onChange={e=>setEd(e.target.value)} style={{width:150,flexShrink:0}}/>
                </>
              )}
            </div>
            <label style={{display:'flex',alignItems:'center',gap:8,fontSize:13,cursor:'pointer'}}>
              <input type="checkbox" checked={allDay} onChange={e=>setAllDay(e.target.checked)}/> All day
            </label>
          </div>
        </Row>

        {/* Event Type */}
        <Row label="Event Type">
          <div style={{display:'flex',gap:8,alignItems:'center',position:'relative'}} ref={typeRef}>
            <select className="input" value={typeId} onChange={e=>setTypeId(e.target.value)} style={{flex:1}}>
              <option value="">Default</option>
              {localTypes.filter(t=>!t.is_default).map(t=><option key={t.id} value={t.id}>{t.name}</option>)}
            </select>
            {isToolManager&&<button className="btn btn-secondary btn-sm" style={{flexShrink:0}} onClick={()=>setShowTypeForm(v=>!v)}>{showTypeForm?'Cancel':'+ Type'}</button>}
            {showTypeForm&&<EventTypePopup userGroups={userGroups} onSave={et=>{setLocalTypes(p=>[...p,et]);setShowTypeForm(false);}} onClose={()=>setShowTypeForm(false)}/>}
          </div>
        </Row>

        {/* Location */}
        <Row label="Location">
          <input className="input" placeholder="Add location" value={loc} onChange={e=>setLoc(e.target.value)}/>
        </Row>

        {/* Description */}
        <Row label="Description">
          <textarea className="input" placeholder="Add description" value={desc} onChange={e=>setDesc(e.target.value)} rows={3} style={{resize:'vertical'}}/>
        </Row>

        <div style={{display:'flex',gap:8,marginTop:8}}>
          <button className="btn btn-primary btn-sm" onClick={handle} disabled={saving}>{saving?'Saving…':event?'Save Changes':'Create Event'}</button>
          <button className="btn btn-secondary btn-sm" onClick={onCancel}>Cancel</button>
          {event&&isToolManager&&<button className="btn btn-sm" style={{marginLeft:'auto',background:'var(--error)',color:'white'}} onClick={()=>onDelete(event)}>Delete</button>}
        </div>
      </div>
    </div>
  );
}

// ── Event Detail Modal ────────────────────────────────────────────────────────
function EventDetailModal({ event, onClose, onEdit, onAvailabilityChange, isToolManager }) {
  const toast=useToast();
  const [myResp,setMyResp]=useState(event.my_response);
  const [avail,setAvail]=useState(event.availability||[]);
  const counts={going:0,maybe:0,not_going:0};
  avail.forEach(r=>{if(counts[r.response]!==undefined)counts[r.response]++;});

  const handleResp=async resp=>{
    try{if(myResp===resp){await api.deleteAvailability(event.id);setMyResp(null);}else{await api.setAvailability(event.id,resp);setMyResp(resp);}onAvailabilityChange?.();}catch(e){toast(e.message,'error');}
  };

  return ReactDOM.createPortal(
    <div className="modal-overlay" onClick={e=>e.target===e.currentTarget&&onClose()}>
      <div className="modal" style={{maxWidth:520,maxHeight:'88vh',overflowY:'auto'}}>
        <div style={{display:'flex',alignItems:'flex-start',justifyContent:'space-between',marginBottom:16}}>
          <div style={{flex:1,paddingRight:12}}>
            <div style={{display:'flex',alignItems:'center',gap:10,marginBottom:4}}>
              {event.event_type&&<span style={{width:13,height:13,borderRadius:'50%',background:event.event_type.colour,flexShrink:0,display:'inline-block'}}/>}
              <h2 style={{fontSize:20,fontWeight:700,margin:0}}>{event.title}</h2>
            </div>
            <div style={{fontSize:13,color:'var(--text-secondary)',display:'flex',alignItems:'center',gap:8}}>
              {event.event_type?.name&&<span>{event.event_type.name}</span>}
              {!event.is_public&&<span style={{background:'var(--surface-variant)',borderRadius:10,padding:'1px 8px',fontSize:11}}>Private</span>}
            </div>
          </div>
          <div style={{display:'flex',gap:6,flexShrink:0}}>
            {isToolManager&&<button className="btn btn-secondary btn-sm" onClick={()=>{onClose();onEdit();}}>Edit</button>}
            <button className="btn-icon" onClick={onClose}><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2"><line x1="18" y1="6" x2="6" y2="18"/><line x1="6" y1="6" x2="18" y2="18"/></svg></button>
          </div>
        </div>

        <div style={{display:'flex',gap:10,alignItems:'center',marginBottom:12,fontSize:14}}>
          <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="var(--text-tertiary)" strokeWidth="2"><rect x="3" y="4" width="18" height="18" rx="2"/><line x1="16" y1="2" x2="16" y2="6"/><line x1="8" y1="2" x2="8" y2="6"/><line x1="3" y1="10" x2="21" y2="10"/></svg>
          <span>{fmtDate(new Date(event.start_at))}{!event.all_day&&` · ${fmtRange(event.start_at,event.end_at)}`}</span>
        </div>
        {event.location&&<div style={{display:'flex',gap:10,alignItems:'center',marginBottom:12,fontSize:14}}><svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="var(--text-tertiary)" strokeWidth="2"><path d="M21 10c0 7-9 13-9 13s-9-6-9-13a9 9 0 0 1 18 0z"/><circle cx="12" cy="10" r="3"/></svg>{event.location}</div>}
        {event.description&&<div style={{display:'flex',gap:10,marginBottom:12,fontSize:14}}><svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="var(--text-tertiary)" strokeWidth="2" style={{flexShrink:0,marginTop:2}}><line x1="21" y1="10" x2="3" y2="10"/><line x1="21" y1="6" x2="3" y2="6"/><line x1="21" y1="14" x2="3" y2="14"/><line x1="21" y1="18" x2="3" y2="18"/></svg><span style={{whiteSpace:'pre-wrap'}}>{event.description}</span></div>}
        {(event.user_groups||[]).length>0&&<div style={{display:'flex',gap:10,marginBottom:16,fontSize:13,color:'var(--text-secondary)'}}><svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="var(--text-tertiary)" strokeWidth="2" style={{flexShrink:0,marginTop:2}}><path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"/><circle cx="9" cy="7" r="4"/><path d="M23 21v-2a4 4 0 0 0-3-3.87"/></svg>{event.user_groups.map(g=>g.name).join(', ')}</div>}

        {event.track_availability&&(
          <div style={{borderTop:'1px solid var(--border)',paddingTop:16,marginTop:4}}>
            <div style={{fontSize:12,fontWeight:700,color:'var(--text-tertiary)',textTransform:'uppercase',letterSpacing:'0.6px',marginBottom:10}}>Your Availability</div>
            <div style={{display:'flex',gap:8,marginBottom:16}}>
              {Object.entries(RESP_LABEL).map(([key,label])=>(
                <button key={key} onClick={()=>handleResp(key)} style={{flex:1,padding:'9px 4px',borderRadius:'var(--radius)',border:`2px solid ${RESP_COLOR[key]}`,background:myResp===key?RESP_COLOR[key]:'transparent',color:myResp===key?'white':RESP_COLOR[key],fontSize:13,fontWeight:600,cursor:'pointer',transition:'all 0.15s'}}>
                  {myResp===key?'✓ ':''}{label}
                </button>
              ))}
            </div>
            {isToolManager&&(
              <>
                <div style={{fontSize:12,fontWeight:700,color:'var(--text-tertiary)',textTransform:'uppercase',letterSpacing:'0.6px',marginBottom:8}}>Responses</div>
                <div style={{display:'flex',gap:20,marginBottom:10,fontSize:13}}>
                  {Object.entries(counts).map(([k,n])=><span key={k}><span style={{color:RESP_COLOR[k],fontWeight:700}}>{n}</span> {RESP_LABEL[k]}</span>)}
                  <span><span style={{fontWeight:700}}>{event.no_response_count||0}</span> No response</span>
                </div>
                {avail.length>0&&(
                  <div style={{border:'1px solid var(--border)',borderRadius:'var(--radius)',overflow:'hidden'}}>
                    {avail.map(r=>(
                      <div key={r.user_id} style={{display:'flex',alignItems:'center',gap:10,padding:'8px 12px',borderBottom:'1px solid var(--border)',fontSize:13}}>
                        <span style={{width:9,height:9,borderRadius:'50%',background:RESP_COLOR[r.response],flexShrink:0,display:'inline-block'}}/>
                        <span style={{flex:1}}>{r.display_name||r.name}</span>
                        <span style={{color:RESP_COLOR[r.response],fontSize:12,fontWeight:600}}>{RESP_LABEL[r.response]}</span>
                      </div>
                    ))}
                  </div>
                )}
              </>
            )}
          </div>
        )}
      </div>
    </div>,
    document.body
  );
}

// ── Event Types Panel ─────────────────────────────────────────────────────────
function EventTypesPanel({ eventTypes, userGroups, onUpdated }) {
  const toast=useToast();
  const [editingType,setEditingType]=useState(null);
  const [showForm,setShowForm]=useState(false);
  const handleDel=async et=>{
    if(!confirm(`Delete "${et.name}"?`)) return;
    try{await api.deleteEventType(et.id);toast('Deleted','success');onUpdated();}catch(e){toast(e.message,'error');}
  };
  return (
    <div style={{maxWidth:560}}>
      <div style={{display:'flex',alignItems:'center',justifyContent:'space-between',marginBottom:16}}>
        <div className="settings-section-label" style={{margin:0}}>Event Types</div>
        <div style={{position:'relative'}}><button className="btn btn-primary btn-sm" onClick={()=>{setShowForm(v=>!v);setEditingType(null);}}>+ New Type</button>{showForm&&!editingType&&<EventTypePopup userGroups={userGroups} onSave={()=>onUpdated()} onClose={()=>setShowForm(false)}/>}</div>
      </div>
      <div style={{display:'flex',flexDirection:'column',gap:6}}>
        {eventTypes.map(et=>(
          <div key={et.id} style={{display:'flex',alignItems:'center',gap:10,padding:'9px 14px',border:'1px solid var(--border)',borderRadius:'var(--radius)'}}>
            <span style={{width:16,height:16,borderRadius:'50%',background:et.colour,flexShrink:0}}/>
            <span style={{flex:1,fontSize:14,fontWeight:500}}>{et.name}</span>
            {et.default_duration_hrs&&<span style={{fontSize:12,color:'var(--text-tertiary)'}}>{et.default_duration_hrs}hr default</span>}
            {!et.is_protected?(
              <div style={{display:'flex',gap:6,position:'relative'}}>
                <button className="btn btn-secondary btn-sm" onClick={()=>{setEditingType(et);setShowForm(true);}}>Edit</button>
                {showForm&&editingType?.id===et.id&&<EventTypePopup editing={et} userGroups={userGroups} onSave={()=>{onUpdated();setShowForm(false);setEditingType(null);}} onClose={()=>{setShowForm(false);setEditingType(null);}}/>}
                <button className="btn btn-sm" style={{background:'var(--error)',color:'white'}} onClick={()=>handleDel(et)}>Delete</button>
              </div>
            ):<span style={{fontSize:11,color:'var(--text-tertiary)'}}>{et.is_default?'Default':'Protected'}</span>}
          </div>
        ))}
      </div>
    </div>
  );
}

// ── Bulk Import Panel ─────────────────────────────────────────────────────────
function BulkImportPanel({ onImported, onCancel }) {
  const toast=useToast();
  const [rows,setRows]=useState(null);
  const [skipped,setSkipped]=useState(new Set());
  const [saving,setSaving]=useState(false);
  const handleFile=async e=>{const file=e.target.files[0];if(!file)return;try{const r=await api.importPreview(file);if(r.error)return toast(r.error,'error');setRows(r.rows);setSkipped(new Set(r.rows.filter(r=>r.duplicate||r.error).map(r=>r.row)));}catch{toast('Upload failed','error');}};
  const handleImport=async()=>{setSaving(true);try{const toImport=rows.filter(r=>!skipped.has(r.row)&&!r.error);const{imported}=await api.importConfirm(toImport);toast(`${imported} event${imported!==1?'s':''} imported`,'success');onImported();}catch(e){toast(e.message,'error');}finally{setSaving(false);}};
  return (
    <div style={{maxWidth:800}}>
      <div className="settings-section-label">Bulk Event Import</div>
      <p style={{fontSize:12,color:'var(--text-tertiary)',marginBottom:12}}>CSV: <code>Event Title, start_date (YYYY-MM-DD), start_time (HH:MM), event_location, event_type, default_duration</code></p>
      <input type="file" accept=".csv" onChange={handleFile} style={{marginBottom:16}}/>
      {rows&&(<><div style={{overflowX:'auto',marginBottom:12}}><table style={{width:'100%',borderCollapse:'collapse',fontSize:12}}><thead><tr style={{borderBottom:'2px solid var(--border)'}}>{['','Row','Title','Start','End','Type','Dur','Status'].map(h=><th key={h} style={{padding:'4px 8px',textAlign:'left',color:'var(--text-tertiary)',whiteSpace:'nowrap'}}>{h}</th>)}</tr></thead><tbody>{rows.map(r=>(<tr key={r.row} style={{borderBottom:'1px solid var(--border)',opacity:skipped.has(r.row)?0.45:1}}><td style={{padding:'4px 8px'}}><input type="checkbox" checked={!skipped.has(r.row)} disabled={!!r.error} onChange={()=>setSkipped(p=>{const n=new Set(p);n.has(r.row)?n.delete(r.row):n.add(r.row);return n;})}/></td><td style={{padding:'4px 8px'}}>{r.row}</td><td style={{padding:'4px 8px',fontWeight:600}}>{r.title}</td><td style={{padding:'4px 8px'}}>{r.startAt?.slice(0,16).replace('T',' ')}</td><td style={{padding:'4px 8px'}}>{r.endAt?.slice(0,16).replace('T',' ')}</td><td style={{padding:'4px 8px'}}>{r.typeName}</td><td style={{padding:'4px 8px'}}>{r.durHrs}hr</td><td style={{padding:'4px 8px'}}>{r.error?<span style={{color:'var(--error)'}}>{r.error}</span>:r.duplicate?<span style={{color:'#f59e0b'}}>⚠ Duplicate</span>:<span style={{color:'var(--success)'}}>✓ Ready</span>}</td></tr>))}</tbody></table></div><div style={{display:'flex',gap:8}}><button className="btn btn-primary btn-sm" onClick={handleImport} disabled={saving}>{saving?'Importing…':`Import ${rows.filter(r=>!skipped.has(r.row)&&!r.error).length} events`}</button><button className="btn btn-secondary btn-sm" onClick={onCancel}>Cancel</button></div></>)}
    </div>
  );
}

// ── Calendar Views ────────────────────────────────────────────────────────────
function ScheduleView({ events, selectedDate, onSelect }) {
  const filtered=events.filter(e=>new Date(e.end_at)>=(selectedDate||new Date(0)));
  if(!filtered.length) return <div style={{textAlign:'center',padding:'60px 20px',color:'var(--text-tertiary)',fontSize:14}}>No upcoming events from selected date</div>;
  return <>{filtered.map(e=>{const s=new Date(e.start_at);const col=e.event_type?.colour||'#9ca3af';return(<div key={e.id} onClick={()=>onSelect(e)} style={{display:'flex',alignItems:'center',gap:20,padding:'14px 20px',borderBottom:'1px solid var(--border)',cursor:'pointer'}} onMouseEnter={el=>el.currentTarget.style.background='var(--background)'} onMouseLeave={el=>el.currentTarget.style.background=''}><div style={{width:44,textAlign:'center',flexShrink:0}}><div style={{fontSize:22,fontWeight:700,lineHeight:1}}>{s.getDate()}</div><div style={{fontSize:11,color:'var(--text-tertiary)',textTransform:'uppercase'}}>{SHORT_MONTHS[s.getMonth()]}, {DAYS[s.getDay()]}</div></div><div style={{width:100,flexShrink:0,display:'flex',alignItems:'center',gap:8,fontSize:13,color:'var(--text-secondary)'}}><span style={{width:10,height:10,borderRadius:'50%',background:col,flexShrink:0}}/>{e.all_day?'All day':fmtRange(e.start_at,e.end_at)}</div><div style={{flex:1,minWidth:0}}><div style={{fontSize:14,fontWeight:600,display:'flex',alignItems:'center',gap:8}}>{e.event_type?.name&&<span style={{fontSize:11,color:'var(--text-tertiary)',textTransform:'uppercase',letterSpacing:'0.5px',fontWeight:600}}>{e.event_type.name}:</span>}{e.title}{e.track_availability&&!e.my_response&&<span style={{width:8,height:8,borderRadius:'50%',background:'#ef4444',flexShrink:0}} title="Awaiting your response"/>}</div>{e.location&&<div style={{fontSize:12,color:'var(--text-tertiary)',marginTop:2}}>{e.location}</div>}</div></div>);})}</>;
}

function DayView({ events, selectedDate, onSelect }) {
  const hours=Array.from({length:16},(_,i)=>i+7);
  const day=events.filter(e=>sameDay(new Date(e.start_at),selectedDate));
  return(<div><div style={{display:'flex',borderBottom:'1px solid var(--border)',padding:'8px 0 8px 60px',fontSize:13,fontWeight:600,color:'var(--primary)'}}><div style={{textAlign:'center'}}><div>{DAYS[selectedDate.getDay()]}</div><div style={{fontSize:28,fontWeight:700}}>{selectedDate.getDate()}</div></div></div>{hours.map(h=>(<div key={h} style={{display:'flex',borderBottom:'1px solid var(--border)',minHeight:52}}><div style={{width:60,flexShrink:0,fontSize:11,color:'var(--text-tertiary)',padding:'3px 10px 0',textAlign:'right'}}>{h>12?`${h-12} PM`:h===12?'12 PM':`${h} AM`}</div><div style={{flex:1,padding:'2px 4px'}}>{day.filter(e=>new Date(e.start_at).getHours()===h).map(e=>(<div key={e.id} onClick={()=>onSelect(e)} style={{margin:'2px 0',padding:'5px 10px',borderRadius:5,background:e.event_type?.colour||'#6366f1',color:'white',fontSize:12,cursor:'pointer',fontWeight:600}}>{e.title} · {fmtRange(e.start_at,e.end_at)}</div>))}</div></div>))}</div>);
}

function WeekView({ events, selectedDate, onSelect }) {
  const ws=weekStart(selectedDate), days=Array.from({length:7},(_,i)=>{const d=new Date(ws);d.setDate(d.getDate()+i);return d;});
  const hours=Array.from({length:16},(_,i)=>i+7), today=new Date();
  return(<div><div style={{display:'grid',gridTemplateColumns:'60px repeat(7,1fr)',borderBottom:'1px solid var(--border)'}}><div/>{days.map((d,i)=><div key={i} style={{textAlign:'center',padding:'6px 4px',fontSize:12,fontWeight:600,color:sameDay(d,today)?'var(--primary)':'var(--text-secondary)'}}>{DAYS[d.getDay()]} {d.getDate()}</div>)}</div>{hours.map(h=>(<div key={h} style={{display:'grid',gridTemplateColumns:'60px repeat(7,1fr)',borderBottom:'1px solid var(--border)',minHeight:46}}><div style={{fontSize:11,color:'var(--text-tertiary)',padding:'3px 10px 0',textAlign:'right'}}>{h>12?`${h-12} PM`:h===12?'12 PM':`${h} AM`}</div>{days.map((d,i)=>(<div key={i} style={{borderLeft:'1px solid var(--border)',padding:'1px 2px'}}>{events.filter(e=>sameDay(new Date(e.start_at),d)&&new Date(e.start_at).getHours()===h).map(e=>(<div key={e.id} onClick={()=>onSelect(e)} style={{background:e.event_type?.colour||'#6366f1',color:'white',borderRadius:3,padding:'2px 5px',fontSize:11,cursor:'pointer',marginBottom:1,fontWeight:600,overflow:'hidden',whiteSpace:'nowrap',textOverflow:'ellipsis'}}>{e.title}</div>))}</div>))}</div>))}</div>);
}

function MonthView({ events, selectedDate, onSelect, onSelectDay }) {
  const y=selectedDate.getFullYear(), m=selectedDate.getMonth(), first=new Date(y,m,1).getDay(), total=daysInMonth(y,m), today=new Date();
  const cells=[]; for(let i=0;i<first;i++) cells.push(null); for(let d=1;d<=total;d++) cells.push(d);
  while(cells.length%7!==0) cells.push(null);
  const weeks=[]; for(let i=0;i<cells.length;i+=7) weeks.push(cells.slice(i,i+7));
  return(<div><div style={{display:'grid',gridTemplateColumns:'repeat(7,1fr)',borderBottom:'1px solid var(--border)'}}>{DAYS.map(d=><div key={d} style={{textAlign:'center',padding:'8px',fontSize:12,fontWeight:600,color:'var(--text-tertiary)'}}>{d}</div>)}</div>{weeks.map((week,wi)=>(<div key={wi} style={{display:'grid',gridTemplateColumns:'repeat(7,1fr)'}}>{week.map((d,di)=>{if(!d)return<div key={di} style={{borderRight:'1px solid var(--border)',borderBottom:'1px solid var(--border)',minHeight:90,background:'var(--surface-variant)'}}/>;const date=new Date(y,m,d),dayEvs=events.filter(e=>sameDay(new Date(e.start_at),date)),isToday=sameDay(date,today);return(<div key={di} onClick={()=>onSelectDay(date)} style={{borderRight:'1px solid var(--border)',borderBottom:'1px solid var(--border)',padding:'4px',minHeight:90,cursor:'pointer'}} onMouseEnter={el=>el.currentTarget.style.background='var(--background)'} onMouseLeave={el=>el.currentTarget.style.background=''}><div style={{width:26,height:26,borderRadius:'50%',display:'flex',alignItems:'center',justifyContent:'center',marginBottom:3,fontSize:13,fontWeight:isToday?700:400,background:isToday?'var(--primary)':'transparent',color:isToday?'white':'var(--text-primary)'}}>{d}</div>{dayEvs.slice(0,3).map(e=>(<div key={e.id} onClick={ev=>{ev.stopPropagation();onSelect(e);}} style={{background:e.event_type?.colour||'#6366f1',color:'white',borderRadius:3,padding:'1px 5px',fontSize:11,marginBottom:2,cursor:'pointer',whiteSpace:'nowrap',overflow:'hidden',textOverflow:'ellipsis'}}>{!e.all_day&&<span style={{marginRight:3}}>{fmtTime(e.start_at)}</span>}{e.title}</div>))}{dayEvs.length>3&&<div style={{fontSize:10,color:'var(--text-tertiary)'}}>+{dayEvs.length-3} more</div>}</div>);})}</div>))}</div>);
}

// ── Main Schedule Page ────────────────────────────────────────────────────────
export default function SchedulePage({ isToolManager, isMobile }) {
  const { user } = useAuth();
  const toast = useToast();

  // Mobile: only day + schedule views
  const allowedViews = isMobile ? ['schedule','day'] : ['schedule','day','week','month'];
  const [view, setView] = useState('schedule');
  const [selDate, setSelDate] = useState(new Date());
  const [events, setEvents] = useState([]);
  const [eventTypes, setEventTypes] = useState([]);
  const [userGroups, setUserGroups] = useState([]);
  const [panel, setPanel] = useState('calendar');
  const [editingEvent, setEditingEvent] = useState(null);
  const [detailEvent, setDetailEvent] = useState(null);
  const [loading, setLoading] = useState(true);
  const [createOpen, setCreateOpen] = useState(false);
  const createRef = useRef(null);

  const load = useCallback(() => {
    Promise.all([api.getEvents(), api.getEventTypes(), api.getUserGroups()])
      .then(([ev,et,ug]) => { setEvents(ev.events||[]); setEventTypes(et.eventTypes||[]); setUserGroups(ug.groups||[]); setLoading(false); })
      .catch(() => setLoading(false));
  }, []);

  useEffect(() => { load(); }, [load]);

  useEffect(() => {
    if (!createOpen) return;
    const h = e => { if (createRef.current && !createRef.current.contains(e.target)) setCreateOpen(false); };
    document.addEventListener('mousedown', h);
    return () => document.removeEventListener('mousedown', h);
  }, [createOpen]);

  const eventDates = new Set(events.map(e => e.start_at?.slice(0,10)));

  const navDate = dir => {
    const d = new Date(selDate);
    if (view==='day') d.setDate(d.getDate()+dir);
    else if (view==='week') d.setDate(d.getDate()+dir*7);
    else d.setMonth(d.getMonth()+dir);
    setSelDate(d);
  };

  const navLabel = () => {
    if (view==='day') return `${DAYS[selDate.getDay()]} ${selDate.getDate()} ${MONTHS[selDate.getMonth()]} ${selDate.getFullYear()}`;
    if (view==='week') { const ws=weekStart(selDate),we=new Date(ws); we.setDate(we.getDate()+6); return `${SHORT_MONTHS[ws.getMonth()]} ${ws.getDate()} – ${SHORT_MONTHS[we.getMonth()]} ${we.getDate()} ${we.getFullYear()}`; }
    return `${MONTHS[selDate.getMonth()]} ${selDate.getFullYear()}`;
  };

  const openDetail = async e => {
    try { const { event } = await api.getEvent(e.id); setDetailEvent(event); } catch { toast('Failed to load event','error'); }
  };

  const handleSaved = () => { load(); setPanel('calendar'); setEditingEvent(null); };
  const handleDelete = async e => {
    if (!confirm(`Delete "${e.title}"?`)) return;
    try { await api.deleteEvent(e.id); toast('Deleted','success'); load(); setDetailEvent(null); } catch(err) { toast(err.message,'error'); }
  };

  if (loading) return <div style={{display:'flex',alignItems:'center',justifyContent:'center',flex:1,color:'var(--text-tertiary)',fontSize:14}}>Loading schedule…</div>;

  // ── Sidebar width matches Messages (~280px) ───────────────────────────────
  const SIDEBAR_W = isMobile ? 0 : 260;

  return (
    <div style={{ display:'flex', flex:1, overflow:'hidden', minHeight:0 }}>
      {/* Left panel — matches sidebar width */}
      {!isMobile && (
        <div style={{ width:SIDEBAR_W, flexShrink:0, borderRight:'1px solid var(--border)', display:'flex', flexDirection:'column', background:'var(--surface)', overflow:'hidden' }}>
          <div style={{ padding:'16px 16px 8px', borderBottom:'1px solid var(--border)' }}>
            <div style={{ fontSize:16, fontWeight:700, marginBottom:12, color:'var(--text-primary)' }}>Team Schedule</div>

            {/* Create button — styled like new-chat-btn */}
            {isToolManager && (
              <div style={{ position:'relative', marginBottom:12 }} ref={createRef}>
                <button className="newchat-btn" onClick={() => setCreateOpen(v=>!v)} style={{ width:'100%', justifyContent:'center', gap:8 }}>
                  <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" strokeWidth={1.5} stroke="currentColor" width="18" height="18">
                    <path strokeLinecap="round" strokeLinejoin="round" d="M12 4.5v15m7.5-7.5h-15" />
                  </svg>
                  Create Event
                  <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2"><polyline points="6 9 12 15 18 9"/></svg>
                </button>
                {createOpen && (
                  <div style={{ position:'absolute', top:'100%', left:0, right:0, zIndex:100, background:'var(--surface)', border:'1px solid var(--border)', borderRadius:'var(--radius)', marginTop:4, boxShadow:'0 4px 16px rgba(0,0,0,0.12)' }}>
                    {[['Event', ()=>{setPanel('eventForm');setEditingEvent(null);setCreateOpen(false);}],
                      ['Event Type', ()=>{setPanel('eventTypes');setCreateOpen(false);}],
                      ['Bulk Event Import', ()=>{setPanel('bulkImport');setCreateOpen(false);}]
                    ].map(([label,action])=>(
                      <button key={label} onClick={action} style={{display:'block',width:'100%',padding:'9px 16px',textAlign:'left',fontSize:14,background:'none',border:'none',cursor:'pointer',color:'var(--text-primary)'}}
                        onMouseEnter={e=>e.currentTarget.style.background='var(--background)'} onMouseLeave={e=>e.currentTarget.style.background=''}>{label}</button>
                    ))}
                  </div>
                )}
              </div>
            )}
          </div>

          {/* Mini calendar */}
          <div style={{ padding:16 }}>
            <MiniCalendar selected={selDate} onChange={d=>{setSelDate(d);setPanel('calendar');}} eventDates={eventDates}/>
          </div>
        </div>
      )}

      {/* Right panel */}
      <div style={{ flex:1, display:'flex', flexDirection:'column', overflow:'hidden', minWidth:0 }}>
        {/* View toolbar */}
        <div style={{ display:'flex', alignItems:'center', gap:8, padding:'8px 16px', borderBottom:'1px solid var(--border)', background:'var(--surface)', flexShrink:0, flexWrap:'nowrap' }}>
          {/* Mobile title + create */}
          {isMobile && (
            <span style={{ fontSize:15, fontWeight:700, flex:1 }}>Team Schedule</span>
          )}

          {!isMobile && (
            <>
              <button className="btn btn-secondary btn-sm" onClick={() => setSelDate(new Date())}>Today</button>
              <div style={{ display:'flex', gap:2 }}>
                <button className="btn-icon" onClick={() => navDate(-1)} style={{ fontSize:16, padding:'2px 8px' }}>‹</button>
                <button className="btn-icon" onClick={() => navDate(1)}  style={{ fontSize:16, padding:'2px 8px' }}>›</button>
              </div>
              {view !== 'schedule' && <span style={{ fontSize:13, fontWeight:600, color:'var(--text-primary)', whiteSpace:'nowrap' }}>{navLabel()}</span>}
              <div style={{ marginLeft:'auto' }}/>
            </>
          )}

          {/* View switcher */}
          <div style={{ display:'flex', gap:2, background:'var(--surface-variant)', borderRadius:'var(--radius)', padding:3, flexShrink:0 }}>
            {allowedViews.map(v => {
              const labels = { schedule:'Schedule', day:'Day', week:'Week', month:'Month' };
              return (
                <button key={v} onClick={()=>{setView(v);setPanel('calendar');}} style={{ padding:'4px 10px', borderRadius:5, border:'none', cursor:'pointer', fontSize:12, fontWeight:600, background:view===v?'var(--surface)':'transparent', color:view===v?'var(--text-primary)':'var(--text-tertiary)', boxShadow:view===v?'0 1px 3px rgba(0,0,0,0.1)':'none', transition:'all 0.15s', whiteSpace:'nowrap' }}>
                  {labels[v]}
                </button>
              );
            })}
          </div>
        </div>

        {/* Mobile date picker */}
        {isMobile && (
          <MobileDatePicker selected={selDate} onChange={d=>{setSelDate(d);setPanel('calendar');}} eventDates={eventDates}/>
        )}

        {/* Calendar or panel content */}
        <div style={{ flex:1, overflowY:'auto', overflowX: panel==='eventForm'?'auto':'hidden' }}>
          {panel === 'calendar' && view === 'schedule' && <ScheduleView events={events} selectedDate={selDate} onSelect={openDetail}/>}
          {panel === 'calendar' && view === 'day'      && <DayView events={events} selectedDate={selDate} onSelect={openDetail}/>}
          {panel === 'calendar' && view === 'week'     && <WeekView events={events} selectedDate={selDate} onSelect={openDetail}/>}
          {panel === 'calendar' && view === 'month'    && <MonthView events={events} selectedDate={selDate} onSelect={openDetail} onSelectDay={d=>{setSelDate(d);setView('schedule');}}/>}

          {panel === 'eventForm' && isToolManager && (
            <div style={{ padding:28, maxWidth:1024 }}>
              <h2 style={{ fontSize:17, fontWeight:700, marginBottom:24 }}>{editingEvent?'Edit Event':'New Event'}</h2>
              <EventForm event={editingEvent} userGroups={userGroups} eventTypes={eventTypes} selectedDate={selDate} isToolManager={isToolManager}
                onSave={handleSaved} onCancel={()=>{setPanel('calendar');setEditingEvent(null);}} onDelete={handleDelete}/>
            </div>
          )}
          {panel === 'eventTypes' && isToolManager && (
            <div style={{ padding:28 }}>
              <div style={{ display:'flex', alignItems:'center', gap:10, marginBottom:24 }}>
                <h2 style={{ fontSize:17, fontWeight:700, margin:0 }}>Event Types</h2>
                <button className="btn btn-secondary btn-sm" onClick={()=>setPanel('calendar')}>← Back</button>
              </div>
              <EventTypesPanel eventTypes={eventTypes} userGroups={userGroups} onUpdated={load}/>
            </div>
          )}
          {panel === 'bulkImport' && isToolManager && (
            <div style={{ padding:28 }}>
              <div style={{ display:'flex', alignItems:'center', gap:10, marginBottom:24 }}>
                <h2 style={{ fontSize:17, fontWeight:700, margin:0 }}>Bulk Event Import</h2>
                <button className="btn btn-secondary btn-sm" onClick={()=>setPanel('calendar')}>← Back</button>
              </div>
              <BulkImportPanel onImported={()=>{load();setPanel('calendar');}} onCancel={()=>setPanel('calendar')}/>
            </div>
          )}
        </div>
      </div>

      {/* Event detail modal */}
      {detailEvent && (
        <EventDetailModal
          event={detailEvent}
          isToolManager={isToolManager}
          onClose={() => setDetailEvent(null)}
          onEdit={() => { setEditingEvent(detailEvent); setPanel('eventForm'); setDetailEvent(null); }}
          onAvailabilityChange={() => openDetail(detailEvent)}
        />
      )}
    </div>
  );
}