"use strict";

const REGIONS = [
  {id:"hokkaido", label:"北海道 Hokkaido"},
  {id:"tohoku", label:"東北 Tohoku"},
  {id:"kanto", label:"関東 Kanto"},
  {id:"chubu", label:"中部 Chubu"},
  {id:"kansai", label:"関西 Kansai"},
  {id:"chugoku", label:"中国 Chugoku"},
  {id:"kyushu", label:"九州 Kyushu"},
];

// Order matters: it drives the stats grid, the filter chips and the legend.
const STATUS = {
  open:      {label:"Open",              color:"#22c55e", short:"Open"},
  closing:   {label:"Closing soon",      color:"#f59e0b", short:"Closing soon"},
  full:      {label:"Full 満員",          color:"#9ca3af", short:"Full (満員)"},
  closed:    {label:"Closed (deadline)", color:"#ef4444", short:"Deadline passed"},
  upcoming:  {label:"Upcoming",          color:"#a78bfa", short:"Upcoming"},
};
const STATUS_KEYS = Object.keys(STATUS);
// Statuses you can actually still sign up for.
const ENTERABLE = ["open","closing"];

const CLOSING_DAYS = 14;

// Difficulty derived from the profile description.
const DIFFICULTY = [
  {id:"fast",  label:"⚡ Flat & fast"},
  {id:"rolling",label:"起伏 Rolling"},
  {id:"tough", label:"⛰ Hilly / tough finish"},
];
function difficultyOf(r){
  const p=(r.profile||"").toLowerCase();
  if(/hilly|brutal| climb|steep|pass/.test(p)) return "tough";
  if(/rolling/.test(p)) return "rolling";
  return "fast";
}

// ---- date helpers (JST-ish, dates only) ----
function d(s){ return new Date(s+"T00:00:00+09:00"); }  // start-of-day JST
function dayEnd(s){ return new Date(s+"T23:59:59+09:00"); } // end-of-day JST
function today(){ return new Date(); }
function fmtDate(s){ const dt=d(s); return dt.toLocaleDateString("en-GB",{year:"numeric",month:"short",day:"2-digit"}); }
function fmtJP(s){ const dt=d(s); return dt.toLocaleDateString("ja-JP",{month:"long",day:"numeric",weekday:"short"}); }
function daysBetween(a,b){ return Math.round((d(b)-d(a))/86400000); }

function statusOf(r){
  if(r.soldOut) return "full";   // capacity reached — distinct from "the deadline passed"
  const now = today();
  const st = d(r.entryStart), en = dayEnd(r.entryEnd);
  if(now < st) return "upcoming";
  if(now > en) return "closed";
  const rem = Math.ceil((en - now)/86400000);
  return rem <= CLOSING_DAYS ? "closing" : "open";
}
function daysLeft(r){ return Math.ceil((dayEnd(r.entryEnd) - today())/86400000); }

// One plain-language line answering "can I still get a spot in this race?"
function availability(r){
  const s = statusOf(r);
  if(s==="full") return {
    s, icon:"🚫",
    text:`満員 FULL — capacity reached${r.capacity?` (${r.capacity.toLocaleString()} runners)`:""}, no spots left`
  };
  if(s==="closed") return {
    s, icon:"⛔",
    text:`Entry closed — ${r.lottery?"lottery":"deadline"} ended ${fmtDate(r.entryEnd)} (not marked full)`
  };
  if(s==="upcoming") return {
    s, icon:"🕒",
    text:`Not open yet — entry opens ${fmtDate(r.entryStart)}`
  };
  const n = Math.max(daysLeft(r),0);
  if(s==="closing") return {
    s, icon:"⚠️",
    text:`Spots still available — closes in ${n} day${n===1?"":"s"} (${fmtDate(r.entryEnd)})`
  };
  return { s, icon:"✅", text:`Spots available — ${n} days left to enter` };
}

// ---- map ----
const map = L.map("map",{zoomControl:true,scrollWheelZoom:true}).setView([36.2,138.6],5);
L.control.zoom({position:"topright"});
L.tileLayer("https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png",{
  maxZoom:14,
  attribution:'&copy; OpenStreetMap'
}).addTo(map);

// nice base style
document.querySelector(".leaflet-control-attribution").style.background="rgba(15,20,25,.7)";
document.querySelector(".leaflet-control-attribution").style.color="#9fb0c0";

const markers = {};
const statusColor = (s)=> STATUS[s].color;

function raceIcon(s){
  const c = STATUS[s].color;
  // full races get an ✕ so "no spots left" is readable straight off the map
  const glyph = s==="full"
    ? `<span style="position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font:900 9px/1 sans-serif;color:#0f1419">\u2715</span>`
    : "";
  return L.divIcon({
    className:"ricon",
    html:`<span style="position:relative;display:block;width:16px;height:16px;border-radius:50%;background:${c};border:3px solid #0f1419;box-shadow:0 0 0 2px ${c}55">${glyph}</span>`,
    iconSize:[16,16], iconAnchor:[8,8], popupAnchor:[0,-10]
  });
}

function popupHtml(r,s){
  const av = availability(r);
  const badge = `<span class="badge ${s}">${STATUS[s].label}</span>`;
  const links = (r.official?`<a href="${r.official}" target="_blank" rel="noopener">公式サイト</a> · `:'') + `<a href="${r.runnet}" target="_blank" rel="noopener">RUNNET</a>`;
  const kv=(label,val)=>val?`<div style="font-size:11.5px;color:#9fb0c0;margin-top:3px"><b style="color:#cdd9e5">${label}:</b> ${val}</div>`:'';
  return `<div class="popup">
    <div class="ptitle">${r.name}</div>
    <div class="pplace">${r.prefecture} ${r.city}${r.lottery?' · 抽選 lottery':''}</div>
    <div class="pdate"><b>${fmtJP(r.date)}</b> (${r.weekday})</div>
    ${badge}
    <div class="avail ${av.s}" style="margin-top:6px">${av.icon} ${av.text}</div>
    <div style="margin-top:6px;font-size:12px;color:#9fb0c0">Entry: ${fmtDate(r.entryStart)} – ${fmtDate(r.entryEnd)}${r.capacity?` · cap ${r.capacity.toLocaleString()}`:''}</div>
    ${kv('Profile',r.profile)}
    ${kv('Climate',r.clim)}
    ${r.vibe?`<div style="font-size:11.5px;line-height:1.45;color:#9fb0c0;margin-top:4px">${r.vibe}</div>`:''}
    ${r.elevNote?`<div style="font-size:11px;line-height:1.4;color:#7b8a99;margin-top:4px">⛰ ${r.elevNote}</div>`:''}
    <div style="margin-top:6px">${links}</div>
  </div>`;
}

RACES.forEach(r=>{
  const s = statusOf(r);
  const m = L.marker([r.lat,r.lng],{icon:raceIcon(s)}).bindPopup(popupHtml(r,s));
  m.raceId = r.id;
  m.addTo(map);
  markers[r.id] = m;
});

// ---- filters state ----
let state = {
  search:"",
  statuses:new Set(STATUS_KEYS),
  month:"all",
  regions:new Set(REGIONS.map(r=>r.id)),
  difficulties:new Set(DIFFICULTY.map(d=>d.id)),
  enterableOnly:false,
  hideSoldOut:false,
  lotteryOnly:false,
  sortAsc:true,
};

// ---- build filter UI ----
const statsEl = document.getElementById("stats");
function renderStats(){
  const counts = {};
  STATUS_KEYS.forEach(k=>counts[k]=0);
  RACES.forEach(r=>counts[statusOf(r)]++);
  const enterable = ENTERABLE.reduce((a,k)=>a+counts[k],0);
  const cell = k => `<div class="stat"><div class="n" style="color:${STATUS[k].color}">${counts[k]}</div><div class="l">${STATUS[k].short}</div></div>`;
  statsEl.innerHTML =
    `<div class="stat wide hero"><div class="n" style="color:#22c55e">${enterable}<span class="of"> / ${RACES.length}</span></div>`+
    `<div class="l">races you can still enter</div></div>`+
    ["open","closing","full","closed"].map(cell).join("")+
    (counts.upcoming ? `<div class="stat wide"><div class="n" style="color:${STATUS.upcoming.color}">${counts.upcoming}</div><div class="l">Entry not open yet</div></div>` : "");
}
renderStats();

const sfEl = document.getElementById("statusFilters");
STATUS_KEYS.forEach(s=>{
  const b=document.createElement("button");
  b.className="chip active";
  b.innerHTML=`<span class="dot" style="background:${STATUS[s].color}"></span>${STATUS[s].label}`;
  b.onclick=()=>{
    if(state.statuses.has(s)){state.statuses.delete(s);b.classList.remove("active");}
    else{state.statuses.add(s);b.classList.add("active");}
    update();
  };
  sfEl.appendChild(b);
});

const rfEl = document.getElementById("regionFilters");
const dfEl = document.getElementById("diffFilters");
if(dfEl){
  DIFFICULTY.forEach(dd=>{
    const b=document.createElement("button");
    b.className="chip active";
    b.textContent=dd.label;
    b.onclick=()=>{
      if(state.difficulties.has(dd.id)){state.difficulties.delete(dd.id);b.classList.remove("active");}
      else{state.difficulties.add(dd.id);b.classList.add("active");}
      update();
    };
    dfEl.appendChild(b);
  });
}
REGIONS.forEach(rg=>{
  const b=document.createElement("button");
  b.className="chip active";
  b.textContent=rg.label;
  b.onclick=()=>{
    if(state.regions.has(rg.id)){state.regions.delete(rg.id);b.classList.remove("active");}
    else{state.regions.add(rg.id);b.classList.add("active");}
    update();
  };
  rfEl.appendChild(b);
});

document.getElementById("search").addEventListener("input",e=>{state.search=e.target.value.toLowerCase();update();});
document.getElementById("monthFilter").addEventListener("change",e=>{state.month=e.target.value;update();});
document.getElementById("enterableOnly").addEventListener("change",e=>{state.enterableOnly=e.target.checked;update();});
document.getElementById("hideSoldOut").addEventListener("change",e=>{state.hideSoldOut=e.target.checked;update();});
document.getElementById("lotteryOnly").addEventListener("change",e=>{state.lotteryOnly=e.target.checked;update();});
const sortBtn=document.getElementById("sortDate");
sortBtn.onclick=()=>{state.sortAsc=!state.sortAsc;sortBtn.textContent="Sort: Date "+(state.sortAsc?"↑":"↓");update();};

// legend
const legendEl=document.getElementById("legend");
legendEl.innerHTML = STATUS_KEYS.map(s=>
  `<div class="row"><span class="dot${s==="full"?" x":""}" style="background:${STATUS[s].color}"></span>${STATUS[s].label}</div>`
).join("");

// ---- filtering ----
function matches(r){
  const s=statusOf(r);
  if(state.enterableOnly && !ENTERABLE.includes(s)) return false;
  if(state.hideSoldOut && s==="full") return false;
  if(state.lotteryOnly && !r.lottery) return false;
  if(!state.statuses.has(s)) return false;
  if(state.month!=="all" && String(Number(r.date.slice(5,7)))!==state.month) return false;
  if(!state.regions.has(r.region)) return false;
  if(!state.difficulties.has(difficultyOf(r))) return false;
  if(state.search){
    const hay=(r.name+" "+r.nameEn+" "+r.prefecture+" "+r.city+" "+r.region).toLowerCase();
    if(!hay.includes(state.search)) return false;
  }
  return true;
}

function update(){
  const visible = RACES.filter(matches).sort((a,b)=> state.sortAsc? (a.date<b.date?-1:a.date>b.date?1:0) : (a.date>b.date?-1:a.date<b.date?1:0));
  // markers
  RACES.forEach(r=>{
    const show = visible.includes(r);
    if(show && !map.hasLayer(markers[r.id])) markers[r.id].addTo(map);
    if(!show && map.hasLayer(markers[r.id])) map.removeLayer(markers[r.id]);
  });
  renderCards(visible);
  document.getElementById("count").textContent = `(${visible.length} / ${RACES.length})`;
  document.getElementById("empty").style.display = visible.length? "none":"block";
}

function renderCards(list){
  const cards=document.getElementById("cards");
  cards.innerHTML = list.map(r=>{
    const s=statusOf(r);
    const av = availability(r);
    const badge = `<span class="badge ${s}">${STATUS[s].label}</span>`;
    const tags = [];
    if(r.lottery) tags.push(`<span class="tag lot">抽選 lottery</span>`);
    if(r.capacity) tags.push(`<span class="tag">cap ${r.capacity.toLocaleString()}</span>`);
    if(r.fee && r.fee!=="—") tags.push(`<span class="tag">${r.fee}</span>`);
    tags.push(`<span class="tag">${r.limitTime}</span>`);
    return `<div class="card${s==="full"?" is-full":""}" data-id="${r.id}">
      <div class="top">
        <div>
          <div class="name">${r.name}</div>
          <div class="place">${r.prefecture} ${r.city}</div>
        </div>
        ${badge}
      </div>
      <div class="date">${fmtJP(r.date)} · ${r.weekday}</div>
      <div class="avail ${av.s}">${av.icon} ${av.text}</div>
      <div class="row"><b>Entry:</b> ${fmtDate(r.entryStart)} → ${fmtDate(r.entryEnd)}</div>
      ${r.profile?`<div class="row"><b>Profile:</b> ${r.profile}</div>`:''}
      ${r.terrain?`<div class="row"><b>Terrain:</b> ${r.terrain}</div>`:''}
      ${r.clim?`<div class="row" style="color:#7bc4f0"><b>🌡 Climate:</b> ${r.clim}</div>`:''}
      ${r.vibe?`<div class="row" style="font-size:11.5px;line-height:1.45;color:#cdd9e5"><b>Vibe:</b> ${r.vibe}</div>`:''}
      ${r.elevNote?`<div class="row" style="font-size:11px;line-height:1.4;color:#7b8a99">⛰ ${r.elevNote}</div>`:''}
      ${r.note?`<div class="row" style="font-size:11px;line-height:1.4;color:#9fb0c0">${r.note}</div>`:''}
      <div class="tags">${tags.join("")}</div>
    </div>`;
  }).join("");
}

// click card -> focus map
document.getElementById("cards").addEventListener("click",e=>{
  const c=e.target.closest(".card"); if(!c) return;
  const r=RACES.find(x=>x.id===c.dataset.id); if(!r) return;
  map.setView([r.lat,r.lng],10,{animate:true});
  markers[r.id].openPopup();
});

update();