// engine/anim/clip-map.js - written by Muse Glimmer (Phase 31, part A, 27 Sep 2026; raw output in game/muse-authored/phase31/raw/),
// reviewed by Grok Bot (coach) with game/muse-authored/phase31/harness/. Coach fixes are marked [coach fix P31-n], see FIXES-P31.md.
(function () {
  function splitCamel(s) {
    // [coach fix P31-1] also split letter/digit boundaries ("sprint01" -> sprint 01, "Character1" -> character 1) and acronym runs ("IDLERifle")
    return s
      .replace(/([a-z0-9])([A-Z])/g, "$1 $2")
      .replace(/([A-Z]+)([A-Z][a-z])/g, "$1 $2")
      .replace(/([A-Za-z])([0-9])/g, "$1 $2")
      .replace(/([0-9])([A-Za-z])/g, "$1 $2");
  }
  function tokenize(name) {
    name = String(name == null ? "" : name); // [coach fix P31-2a] tolerate null/undefined clip names
    var seg = ""; // [coach fix P31-2] when every segment is a junk take name ("Take 001"), there are no tokens (was: the whole name)
    var parts = name.split("|");
    for (var i = parts.length - 1; i >= 0; i--) {
      var p = parts[i].trim();
      if (!p) continue;
      var low = p.toLowerCase();
      if (low === "mixamo.com" || low === "layer0" || low === "baselayer" || low === "default") continue;
      if (/^take\s*\d+$/.test(low) || /^take\d+$/.test(low)) continue;
      seg = p;
      break;
    }
    var colon = seg.lastIndexOf(":");
    if (colon !== -1) seg = seg.slice(colon + 1);
    seg = splitCamel(seg);
    var raw = seg.split(/[\s_\-\.]+/);
    var out = [];
    for (var t of raw) {
      if (!t) continue;
      var tt = t.toLowerCase();
      if (/^\d+$/.test(tt)) continue;
      out.push(tt);
    }
    return out;
  }
  function stem(w) {
    if (w === "dying") return "die";
    if (w === "running") return "run";
    if (w === "firing") return "fire";
    if (w.endsWith("ing") && w.length > 4) return w.slice(0, -3);
    if (w.endsWith("ed") && w.length > 3) return w.slice(0, -2);
    if (w.endsWith("s") && w.length > 3) return w.slice(0, -1);
    return w;
  }
  var ROLES = ["idle", "walk", "run", "shoot", "death"];
  var SYN = {
    idle: ["idle", "stand", "standing", "breathe", "breathing", "rest"],
    walk: ["walk", "stroll"],
    run: ["run", "jog", "sprint"],
    shoot: ["shoot", "shot", "fire", "attack", "gunshot"],
    death: ["death", "die", "dead", "dying"],
  };
  var DIR = ["back", "backward", "backwards", "left", "right", "strafe", "turn", "side"];
  var PEN = ["hit", "react", "reaction", "hurt", "start", "end", "stop", "to"];
  function scoreClip(tokens, role) {
    var syn = SYN[role];
    var hasSyn = false;
    for (var t of tokens) {
      var s = stem(t);
      for (var k of syn) {
        if (s === k || t === k) {
          hasSyn = true;
          break;
        }
      }
      if (hasSyn) break;
    }
    if (!hasSyn) return -Infinity;
    var sc = 10;
    var other = 0;
    for (var r of ROLES) {
      if (r === role) continue;
      for (var t of tokens) {
        var s = stem(t);
        for (var k of SYN[r]) {
          if (s === k || t === k) {
            other++;
            break;
          }
        }
      }
    }
    if (other > 0) sc -= 6;
    for (var t of tokens) {
      if (DIR.includes(t)) sc -= 4;
    }
    for (var t of tokens) {
      if (PEN.includes(t)) sc -= 3;
    }
    if (tokens.length > 1) sc -= tokens.length - 1;
    if (role === "walk" || role === "run") {
      for (var t of tokens) {
        if (t === "loop" || t === "forward" || t === "fwd") sc += 1;
      }
    }
    return sc;
  }
  function match(names, opts) {
    opts = opts || {};
    var overrides = opts.overrides || {};
    var n = names.length;
    var tokenLists = names.map(tokenize);
    var scores = {};
    for (var r of ROLES) {
      scores[r] = new Array(n).fill(-Infinity);
    }
    for (var i = 0; i < n; i++) {
      var toks = tokenLists[i];
      for (var ri = 0; ri < ROLES.length; ri++) {
        var r = ROLES[ri];
        var sc = scoreClip(toks, r);
        if (sc >= 5) scores[r][i] = sc;
      }
    }
    var roleIdx = {};
    for (var i = 0; i < ROLES.length; i++) roleIdx[ROLES[i]] = i;
    var assignedClip = new Array(n).fill(false);
    var roleMap = {};
    for (var r of ROLES) roleMap[r] = -1;
    for (var r of ROLES) {
      var idx = overrides[r];
      if (idx !== undefined) {
        if (idx >= 0 && idx < n) {
          roleMap[r] = idx;
          assignedClip[idx] = true;
        } else {
          roleMap[r] = -1;
        }
      }
    }
    // [coach fix P31-3] roles given in overrides (including -1 = "force none") are not auto-assigned afterwards
    var remainingRoles = ROLES.filter(function (r) {
      return roleMap[r] === -1 && overrides[r] === undefined;
    });
    while (remainingRoles.length) {
      var best = { score: -Infinity, ri: -1, ci: -1 };
      for (var ri = 0; ri < remainingRoles.length; ri++) {
        var r = remainingRoles[ri];
        for (var i = 0; i < n; i++) {
          if (assignedClip[i]) continue;
          var sc = scores[r][i];
          if (sc > best.score || (sc === best.score && (i < best.ci || (i === best.ci && roleIdx[r] < roleIdx[ROLES[best.ri]])))) {
            best = { score: sc, ri: ri, ci: i };
          }
        }
      }
      if (best.score === -Infinity || best.score < 5) break;
      var r = remainingRoles[best.ri];
      roleMap[r] = best.ci;
      assignedClip[best.ci] = true;
      remainingRoles.splice(best.ri, 1);
    }
    var used = new Set();
    for (var r of ROLES) {
      if (roleMap[r] >= 0) used.add(roleMap[r]);
    }
    var unmatched = [];
    for (var i = 0; i < n; i++) if (!used.has(i)) unmatched.push(i);
    return {
      roles: { idle: roleMap.idle, walk: roleMap.walk, run: roleMap.run, shoot: roleMap.shoot, death: roleMap.death },
      // [coach fix P31-3b] spec: scores = {role: score of the chosen clip} (was the full per-clip arrays); null when unassigned, 'override' when forced
      scores: ROLES.reduce(function (o, r) {
        o[r] = overrides[r] !== undefined ? "override" : roleMap[r] >= 0 ? scores[r][roleMap[r]] : null;
        return o;
      }, {}),
      unmatched: unmatched,
    };
  }
  function boneKey(name) {
    var s = String(name == null ? "" : name); // [coach fix P31-2a]
    var colon = s.lastIndexOf(":");
    var pipe = s.lastIndexOf("|");
    var cut = Math.max(colon, pipe);
    if (cut !== -1) s = s.slice(cut + 1);
    s = s.toLowerCase().trim();
    s = s
      .replace(/^mixamorig/, "")
      .replace(/^bip01/, "")
      .replace(/^bip001/, "");
    s = s.replace(/^character1_/, "");
    s = s.replace(/[\s_\.]+/g, "");
    return s;
  }
  window.MuseClipMap = { ROLES: ROLES, tokens: tokenize, match: match, boneKey: boneKey };
})();