// graph.js — v9.50: platform row | infra row | grid | Manhattan edges
(function () {
  "use strict";

  var COLS=5, NW=170, NH=56, RW=160, RH=44, GX=30, GY=70, PX=40, PY=30;

  var INFRA = ["s3","vcloud","штурвал","cloud direct","edge","vdc","vapp"];
  function isInfra(svc){
    var s=(svc||"").toLowerCase();
    for(var i=0;i<INFRA.length;i++){if(s.indexOf(INFRA[i])>=0)return true;}
    return false;
  }

  var SVC_STYLE = [
    ["s3","#1d4e6e","#38bdf8"],["postgresql","#1a3d2b","#4ade80"],["postgres","#1a3d2b","#4ade80"],
    ["redis","#4a1c1c","#f87171"],["vcloud","#1a2e4a","#60a5fa"],["штурвал","#1a2e4a","#60a5fa"],
    ["cloud direct","#0c2340","#93c5fd"],["rabbitmq","#3b2000","#fb923c"],
    ["nodejs","#1a3b20","#86efac"],["flask","#1a3b20","#86efac"],["lucee","#2d1b4a","#c084fc"],
    ["mongodb","#1a3a1a","#4ade80"],["grafana","#2d1000","#fdba74"],["pgadmin","#1a3d2b","#6ee7b7"],
    ["edge","#1e293b","#94a3b8"],["vdc","#1e293b","#94a3b8"],["vapp","#1e293b","#94a3b8"],
    ["dns","#1a2040","#818cf8"],["nodered","#3b1500","#fdba74"],["http","#1a2e1a","#bbf7d0"]
  ];
  function svcStyle(svc){
    var s=(svc||"").toLowerCase();
    for(var i=0;i<SVC_STYLE.length;i++){
      if(s.indexOf(SVC_STYLE[i][0])>=0)return{bg:SVC_STYLE[i][1],border:SVC_STYLE[i][2]};
    }
    return{bg:"#1e293b",border:"#475569"};
  }
  function svcColor(svc){return svcStyle(svc).border;}
  function statusDot(s){
    var m={running:"#56d364",suspended:"#e3b341",deleted:"#f85149",
           deleting:"#f85149",pending:"#58a6ff",creating:"#58a6ff"};
    return m[(s||"").toLowerCase()]||"#6e7681";
  }
  function esc(v){
    return String(v==null?"":v)
      .replace(/&/g,"&amp;").replace(/</g,"&lt;")
      .replace(/>/g,"&gt;").replace(/"/g,"&quot;");
  }
  function trunc(s,n){return(!s)?"":s.length>n?s.slice(0,n-1)+"\u2026":s;}

  // ── State ─────────────────────────────────────────────────────────────────
  var graphCache=null, building=false;
  function getOverlay(){return document.getElementById("graph-overlay");}
  function getCanvas() {return document.getElementById("graph-canvas");}
  function getStatus() {return document.getElementById("graph-status");}
  function setStatus(m){var el=getStatus();if(el)el.textContent=m;}

  function openGraph(){
    var ov=getOverlay();if(!ov)return;
    ov.style.display="flex";
    if(graphCache){getCanvas().innerHTML=graphCache;attachPanzoom();}
    else if(!building)buildGraph();
  }
  function closeGraph(){var ov=getOverlay();if(ov)ov.style.display="none";}
  function refreshGraph(){graphCache=null;building=false;var c=getCanvas();if(c)c.innerHTML="";buildGraph();}

  // ── Layout ────────────────────────────────────────────────────────────────
  function computeLayout(instances){
    var realms=[],seen={};
    instances.forEach(function(i){
      var r=i.resourceRealm||"";
      if(r&&!seen[r]){seen[r]=true;realms.push(r);}
    });
    var infra  = instances.filter(function(i){return isInfra(i.svc);});
    var others = instances.filter(function(i){return !isInfra(i.svc);});
    var canvasW = PX*2 + COLS*NW + (COLS-1)*GX;

    // Row 0: platforms — spread evenly across full width
    var realmNodes = realms.map(function(r,i){
      var sp=canvasW/realms.length, cx=sp*i+sp/2;
      return{id:"realm:"+r,label:r,x:cx-RW/2,y:PY,w:RW,h:RH,cx:cx,cy:PY+RH/2};
    });

    // Row 1: infra (S3, Cloud Director, Edge) — spread evenly
    var row1Y = PY+RH+GY;
    var infraNodes = infra.map(function(inst,i){
      var sp=canvasW/Math.max(infra.length,1), cx=sp*i+sp/2;
      return{uid:inst.instanceUid,inst:inst,x:cx-NW/2,y:row1Y,w:NW,h:NH,cx:cx,cy:row1Y+NH/2};
    });

    // Row 2+: other instances — grid, max COLS per row
    var row2Y = row1Y+(infra.length>0?NH+GY:0);
    var otherNodes = others.map(function(inst,i){
      var col=i%COLS, row=Math.floor(i/COLS);
      var x=PX+col*(NW+GX), y=row2Y+row*(NH+GY);
      return{uid:inst.instanceUid,inst:inst,x:x,y:y,w:NW,h:NH,cx:x+NW/2,cy:y+NH/2};
    });
    return{realms:realmNodes,infra:infraNodes,others:otherNodes};
  }

  // ── Manhattan (orthogonal) path ───────────────────────────────────────────
  function mpath(src,tgt){
    var x1=src.cx, y1=src.y+src.h;  // source bottom-center
    var x2=tgt.cx, y2=tgt.y;        // target top-center
    if(Math.abs(y1-y2)<8){
      // same row: dip below both nodes
      var dip=Math.max(src.y+src.h,tgt.y+tgt.h)+24;
      return"M"+x1+","+y1+" L"+x1+","+dip+" L"+x2+","+dip+" L"+x2+","+y2;
    }
    var my=(y1+y2)/2;
    return"M"+x1+","+y1+" L"+x1+","+my+" L"+x2+","+my+" L"+x2+","+y2;
  }

  // ── SVG render ────────────────────────────────────────────────────────────
  function renderSVG(instances, depEdges){
    var layout=computeLayout(instances);
    var nodeMap={};
    layout.realms.forEach(function(n){nodeMap[n.id]=n;});
    layout.infra.forEach(function(n){nodeMap[n.uid]=n;});
    layout.others.forEach(function(n){nodeMap[n.uid]=n;});

    var allN=layout.realms.concat(layout.infra).concat(layout.others);
    var maxX=0, maxY=0;
    allN.forEach(function(n){
      if(n.x+n.w>maxX)maxX=n.x+n.w;
      if(n.y+n.h>maxY)maxY=n.y+n.h;
    });
    var W=maxX+PX, H=maxY+PY;

    // Collect unique edge colors for arrowhead markers
    var colors={"#334155":1};
    depEdges.forEach(function(e){if(e.color)colors[e.color]=1;});

    var p=[
      '<svg id="graph-svg" xmlns="http://www.w3.org/2000/svg" width="'+W+'" height="'+H+'" viewBox="0 0 '+W+' '+H+'">',
      '<defs>'
    ];
    Object.keys(colors).forEach(function(c){
      var id="arr"+c.replace(/[^a-zA-Z0-9]/g,"");
      p.push('<marker id="'+id+'" markerWidth="8" markerHeight="8" refX="7" refY="3" orient="auto">'+
             '<path d="M0,0 L0,6 L8,3 z" fill="'+esc(c)+'"/></marker>');
    });
    p.push('</defs>');

    // Platform → instance lines (thin dashed, gray)
    instances.forEach(function(inst){
      var r=inst.resourceRealm; if(!r)return;
      var src=nodeMap["realm:"+r], tgt=nodeMap[inst.instanceUid];
      if(!src||!tgt)return;
      p.push('<path d="'+esc(mpath(src,tgt))+'" fill="none" stroke="#334155" stroke-width="1" opacity="0.35" stroke-dasharray="4,3"/>');
    });

    // Dependency edges (colored Manhattan lines with arrow)
    depEdges.forEach(function(e){
      var src=nodeMap[e.from], tgt=nodeMap[e.to];
      if(!src||!tgt)return;
      var c=e.color||"#475569";
      var id="arr"+c.replace(/[^a-zA-Z0-9]/g,"");
      p.push('<path d="'+esc(mpath(src,tgt))+'" fill="none" stroke="'+esc(c)+
             '" stroke-width="2" opacity="0.85" marker-end="url(#'+id+')"/>');
    });

    // Realm (platform) nodes
    layout.realms.forEach(function(n){
      p.push('<rect x="'+n.x+'" y="'+n.y+'" width="'+n.w+'" height="'+n.h+
             '" rx="6" fill="#0f172a" stroke="#475569" stroke-width="1.5" stroke-dasharray="5,3"/>');
      p.push('<text x="'+n.cx+'" y="'+(n.y+13)+'" text-anchor="middle" '+
             'font-family="sans-serif" font-size="9" font-weight="600" fill="#64748b">ПЛАТФОРМА</text>');
      p.push('<text x="'+n.cx+'" y="'+(n.y+n.h-10)+'" text-anchor="middle" '+
             'font-family="sans-serif" font-size="12" font-weight="700" fill="#e2e8f0">'+
             esc(trunc(n.label,20))+'</text>');
    });

    // Instance nodes (infra row + grid rows)
    layout.infra.concat(layout.others).forEach(function(n){
      var st=svcStyle(n.inst.svc), dot=statusDot(n.inst.explainedStatus);
      var lbl=trunc(n.inst.displayName||n.inst.instanceUid,18);
      var svc=trunc(n.inst.svc||"",22);
      p.push('<rect x="'+n.x+'" y="'+n.y+'" width="'+n.w+'" height="'+n.h+
             '" rx="6" fill="'+esc(st.bg)+'" stroke="'+esc(st.border)+'" stroke-width="1.5"/>');
      p.push('<circle cx="'+(n.x+12)+'" cy="'+(n.y+n.h/2)+'" r="4" fill="'+esc(dot)+'"/>');
      p.push('<text x="'+(n.x+24)+'" y="'+(n.y+n.h/2-5)+
             '" font-family="sans-serif" font-size="12" font-weight="600" fill="#f1f5f9">'+esc(lbl)+'</text>');
      p.push('<text x="'+(n.x+24)+'" y="'+(n.y+n.h/2+11)+
             '" font-family="sans-serif" font-size="10" fill="'+esc(st.border)+'">'+esc(svc)+'</text>');
    });

    p.push('</svg>');
    return p.join("\n");
  }

  // ── Panzoom ───────────────────────────────────────────────────────────────
  function attachPanzoom(){
    var svg=document.getElementById("graph-svg");
    if(!svg||typeof panzoom==="undefined")return;
    if(svg._pz){try{svg._pz.dispose();}catch(e){}}
    svg._pz=panzoom(svg,{maxZoom:4,minZoom:0.1,smoothScroll:false});
  }

  // ── Build ─────────────────────────────────────────────────────────────────
  function buildGraph(){
    if(building)return;
    building=true; graphCache=null;
    var canvas=getCanvas(); if(!canvas)return;
    canvas.innerHTML=""; setStatus("Загрузка\u2026");

    var instances=(typeof window._getVisibleInstances==="function")?window._getVisibleInstances()
                 :(typeof window._getInstances==="function"?window._getInstances():[]);

    if(!instances||!instances.length){
      setStatus("Нет данных. Обновите таблицу и откройте схему снова.");
      building=false; return;
    }

    canvas.innerHTML=renderSVG(instances,[]); attachPanzoom();
    setStatus("Загрузка зависимостей\u2026");

    var edges=[], total=instances.length, done=0;

    function loadNext(idx){
      if(idx>=instances.length){
        canvas.innerHTML=renderSVG(instances,edges); attachPanzoom();
        graphCache=canvas.innerHTML; building=false; setStatus(""); return;
      }
      var uid=instances[idx].instanceUid, srcSvc=instances[idx].svc||"";
      fetch("/dashboard/api/instances/"+uid,{
        headers:{
          "X-Deck-Token":localStorage.getItem("deck_token")||"",
          "X-Deck-Env":localStorage.getItem("deck_env")||"test"
        }
      })
      .then(function(r){return r.ok?r.json():null;})
      .then(function(data){
        done++; setStatus("Зависимости: "+done+"/"+total);
        if(data){
          var inst=data.instance||data;
          [].concat(inst.dependencies||[],inst.deps||[]).forEach(function(d){
            var to=d.uid||d.instanceUid||d.dependencyUid;
            if(to)edges.push({from:uid,to:to,color:svcColor(d.svc||srcSvc)});
          });
          [].concat(inst.dependentInstances||[],inst.dependsOn||[]).forEach(function(d){
            var from=d.uid||d.instanceUid||d.dependencyUid;
            if(from)edges.push({from:from,to:uid,color:svcColor(d.svc||srcSvc)});
          });
        }
        setTimeout(function(){loadNext(idx+1);},20);
      })
      .catch(function(){done++;setTimeout(function(){loadNext(idx+1);},20);});
    }
    loadNext(0);
  }

  // ── Init ──────────────────────────────────────────────────────────────────
  function init(){
    var a=document.getElementById("btn-graph-open");
    var b=document.getElementById("btn-graph-close");
    var c=document.getElementById("btn-graph-refresh");
    var ov=document.getElementById("graph-overlay");
    if(a)a.addEventListener("click",openGraph);
    if(b)b.addEventListener("click",closeGraph);
    if(c)c.addEventListener("click",refreshGraph);
    if(ov)ov.addEventListener("click",function(e){if(e.target===ov)closeGraph();});
    document.addEventListener("keydown",function(e){if(e.key==="Escape")closeGraph();});
  }

  if(document.readyState==="loading"){document.addEventListener("DOMContentLoaded",init);}else{init();}
  window.graphModule={open:openGraph,close:closeGraph,refresh:refreshGraph};
})();