// Shared helpers + status palette — matches Crewli light-mode look
window.CrewliHelpers = (function () {
  // Status palette tuned to Crewli's light surface + teal accent.
  // Each status: pill bg/fg for popover & inline switches; block bg/border for timetable rows.
  const STATUS = {
    concept: {
      label: "Concept",
      pillBg: "#eceae6", pillFg: "#5a574e",
      blockBg: "#f1efe9", blockBorder: "#dcd9d1", blockFg: "#3a3830",
      dot: "#a09c92",
    },
    requested: {
      label: "Aangevraagd",
      pillBg: "#fdf2dc", pillFg: "#8a6a1d",
      blockBg: "#fff6e0", blockBorder: "#f0d99a", blockFg: "#5d4612",
      dot: "#d9a93c",
    },
    option: {
      label: "Optie",
      pillBg: "#ece6f6", pillFg: "#5d4a8a",
      blockBg: "#f3eefa", blockBorder: "#d9c9ed", blockFg: "#3f2f6a",
      dot: "#9a82c7",
    },
    confirmed: {
      label: "Bevestigd",
      pillBg: "#dff5ec", pillFg: "#1f7a5e",
      blockBg: "#e8f8f0", blockBorder: "#a9e0c8", blockFg: "#125541",
      dot: "#3cc2a8",
    },
    contracted: {
      label: "Getekend",
      pillBg: "#dcecfa", pillFg: "#1f5a8a",
      blockBg: "#e6f1fb", blockBorder: "#a8cfee", blockFg: "#143b5d",
      dot: "#3a8acc",
    },
    cancelled: {
      label: "Geannuleerd",
      pillBg: "#f0eeea", pillFg: "#8a8780",
      blockBg: "#f5f3ef", blockBorder: "#dedbd3", blockFg: "#7a7770",
      dot: "#a8a59d",
    },
  };

  // minute-of-grid -> "HH:MM" (handles past-midnight rollover)
  function fmtTime(minOfGrid, startHour) {
    const total = startHour * 60 + minOfGrid;
    const h = Math.floor(total / 60) % 24;
    const m = total % 60;
    return String(h).padStart(2, "0") + ":" + String(m).padStart(2, "0");
  }
  function snap(min, step) { return Math.round(min / step) * step; }

  function findConflicts(performances) {
    const conflicts = new Set();
    const byStage = {};
    for (const p of performances) {
      if (p.status === "cancelled") continue;
      (byStage[p.stage_id] = byStage[p.stage_id] || []).push(p);
    }
    for (const sid in byStage) {
      const list = byStage[sid].slice().sort((a, b) => a.start - b.start);
      for (let i = 0; i < list.length; i++) {
        for (let j = i + 1; j < list.length; j++) {
          if (list[j].start < list[i].end) {
            conflicts.add(list[i].id);
            conflicts.add(list[j].id);
          }
        }
      }
    }
    return conflicts;
  }

  function findB2B(performances, gap = 5) {
    const links = [];
    const byStage = {};
    for (const p of performances) {
      if (p.status === "cancelled") continue;
      (byStage[p.stage_id] = byStage[p.stage_id] || []).push(p);
    }
    for (const sid in byStage) {
      const list = byStage[sid].slice().sort((a, b) => a.start - b.start);
      for (let i = 0; i < list.length - 1; i++) {
        const gapMin = list[i + 1].start - list[i].end;
        if (gapMin >= 0 && gapMin <= gap) {
          links.push({ leftId: list[i].id, rightId: list[i + 1].id, gap: gapMin });
        }
      }
    }
    return links;
  }

  function isCapacityWarn(artist, stage) {
    if (!artist || !stage) return false;
    return artist.draw > stage.capacity * 1.1;
  }

  // Lane-pack: assign each item a lane index so overlapping items stack vertically.
  // Items with explicit `lane` (integer) are honored exactly — even if they overlap
  // another item on the same lane (that's a real conflict and shows visually).
  // Items without `lane` get placed in the lowest lane that has no time-overlap
  // with already-placed items (explicit OR previously auto-placed).
  // Returns { laneOf: {id: lane}, laneCount }
  function assignLanes(items) {
    const sorted = items.slice().sort((a, b) => a.start - b.start || a.id.localeCompare(b.id));
    const laneOf = {};
    let maxLane = 0;

    const overlapsAt = (it, lane) => sorted.some(other =>
      other.id !== it.id &&
      laneOf[other.id] === lane &&
      other.start < it.end && other.end > it.start
    );

    // Pass 1 — items with explicit lane (sorted by lane asc): try requested lane,
    // bump down on conflict to avoid overlap.
    const explicit = sorted.filter(i => Number.isInteger(i.lane))
                           .sort((a, b) => a.lane - b.lane || a.start - b.start);
    for (const it of explicit) {
      let lane = Math.max(0, it.lane);
      while (overlapsAt(it, lane)) lane++;
      laneOf[it.id] = lane;
      if (lane > maxLane) maxLane = lane;
    }

    // Pass 2 — items without explicit lane: lowest free lane.
    for (const it of sorted) {
      if (it.id in laneOf) continue;
      let lane = 0;
      while (overlapsAt(it, lane)) lane++;
      laneOf[it.id] = lane;
      if (lane > maxLane) maxLane = lane;
    }
    return { laneOf, laneCount: maxLane + 1 };
  }

  function advanceCount(artist, sections) {
    let done = 0;
    for (const s of sections) if (artist.advance && artist.advance[s.key]) done++;
    return { done, total: sections.length };
  }

  return { STATUS, fmtTime, snap, findConflicts, findB2B, isCapacityWarn, advanceCount, assignLanes };
})();