// gk-greyknight — helpers v0.6.4 (Brotherhood discipline prompt)
Hooks.once("ready", () => {
  const PACK_KEY = "gk-greyknight.gk-items";
  const PACK_SRC_PREFIX = `Compendium.${PACK_KEY}.`;
  const FLAG_SCOPE = "gk-greyknight";

  async function promptDiscipline(actor) {
    const existing = await actor.getFlag(FLAG_SCOPE, "discipline");
    if (existing) return existing;
    return await new Promise(resolve => {
      new Dialog({
        title: "Brotherhood of Psykers — Discipline",
        content: `<p>Choose a psychic discipline for this character:</p>
          <div style="display:flex; gap:.75rem; margin-top:.5rem;">
            <label><input type="radio" name="disc" value="librarius" checked> Librarius</label>
            <label><input type="radio" name="disc" value="sanctic"> Sanctic</label>
          </div>
          <p style="margin:.5rem 0 0; font-size:.9em; opacity:.8;">(You can change this later in Actor → Flags → gk-greyknight → discipline.)</p>`,
        buttons: {
          ok: { label: "Confirm", icon: "<i class='fas fa-check'></i>", callback: html => resolve(html.find('input[name=\"disc\"]:checked').val() || "librarius") },
          cancel: { label: "Cancel", callback: () => resolve(null) }
        },
        default: "ok"
      }).render(true);
    });
  }

  if (window._gkBroHookId) { Hooks.off("createItem", window._gkBroHookId); window._gkBroHookId = null; }

  window._gkBroHookId = Hooks.on("createItem", async (item, opts, userId) => {
    try {
      if (game.userId !== userId) return;
      if (item?.type !== "ability") return;
      const name = item?.name || "";
      if (name !== "Brotherhood of Psykers") return;
      const src = item?.flags?.core?.sourceId || "";
      const isFromOurPack = src.startsWith(PACK_SRC_PREFIX);
      if (!isFromOurPack && name !== "Brotherhood of Psykers") return;
      const actor = item.parent; if (!actor) return;

      const chosen = await promptDiscipline(actor);
      if (!chosen) return;
      await actor.setFlag(FLAG_SCOPE, "discipline", chosen);

      if (chosen === "sanctic") {
        ui.notifications.info("Discipline set to SANCTIC. Open the GK compendium and pick one Sanctic power as your starter.");
      } else {
        ui.notifications.info("Discipline set to LIBRARIUS. Use core Librarius powers from wng-core.");
      }
    } catch (e) { console.error("gk-greyknight brotherhood helper:", e); }
  });

  console.log("gk-greyknight helpers active (v0.6.4): Brotherhood discipline prompt enabled.");
});

/* gk-greyknight 0.6.4.1 — house-rule reminder (non-blocking) */
Hooks.on("preCreateChatMessage", (doc, data, options, userId) => {
  try {
    const flavor = (data.flavor || "").toLowerCase();
    const isPsychic = flavor.includes("psychic") || flavor.includes("power");
    if (!isPsychic) return;
    const speaker = data.speaker || {}; const actor = game.actors?.get(speaker.actor);
    if (!actor) return;
    const hasBrotherhood = actor.items?.some(i => i.type === "ability" && i.name === "Brotherhood of Psykers");
    if (!hasBrotherhood) return;
    const combat = game.combat; if (!combat) return;
    const key = `gk-greyknight.usedPsychicAction.r${combat.round}`;
    const prev = combat.getFlag("gk-greyknight", key) || null;
    if (prev && prev !== actor.id) ui.notifications?.warn("House rule (Brotherhood Focus): only one Grey Knight should use a psychic power as their Action this round.");
    else if (!prev) combat.setFlag("gk-greyknight", key, actor.id);
  } catch (e) { console.error("gk-greyknight helpers (house-rule reminder):", e); }
});

// === gk-greyknight 0.6.4.3 — Brotherhood discipline prompt + starter grants ===
Hooks.once("ready", () => {
  const FLAG_SCOPE = "gk-greyknight";
  // Prevent duplicate hook registration on hot-reload
  if (window._gkBroHookId) { Hooks.off("createItem", window._gkBroHookId); window._gkBroHookId = null; }

  async function findItemInAllPacksByName(name, type=null) {
    for (const pack of game.packs) {
      if (pack.documentName !== "Item") continue;
      const index = await pack.getIndex();
      const hit = index.find(e => e.name === name && (!type || e.type === type));
      if (hit) return await pack.getDocument(hit._id);
    }
    return null;
  }
  async function ensureHasItemByName(actor, name, type=null) {
    const existing = actor.items?.find(i => i.name === name && (!type || i.type === type));
    if (existing) return existing;
    const doc = await findItemInAllPacksByName(name, type);
    if (!doc) return null;
    const data = doc.toObject(); delete data._id;
    const [created] = await actor.createEmbeddedDocuments("Item", [data]);
    return created;
  }
  async function promptDiscipline(actor) {
    const existing = await actor.getFlag(FLAG_SCOPE, "discipline");
    if (existing) return existing;
    return await new Promise(resolve => {
      new Dialog({
        title: "Brotherhood of Psykers — Choose Discipline",
        content: `<p>Select a discipline for this character:</p>
                  <label style='display:block;margin-top:.5rem'><input type="radio" name="disc" value="sanctic" checked> Sanctic</label>
                  <label style='display:block'><input type="radio" name="disc" value="librarius"> Librarius</label>`,
        buttons: {
          ok: { label: "Confirm", icon: "<i class='fas fa-check'></i>", callback: html => resolve(html.find('input[name="disc"]:checked').val() || "sanctic") },
          cancel: { label: "Cancel", callback: () => resolve(null) }
        },
        default: "ok"
      }).render(true);
    });
  }

  window._gkBroHookId = Hooks.on("createItem", async (item, opts, userId) => {
    try {
      if (game.userId !== userId) return;
      if (item?.type !== "ability" || item?.name !== "Brotherhood of Psykers") return;
      const actor = item.parent; if (!actor) return;

      const chosen = await promptDiscipline(actor);
      if (!chosen) return;
      await actor.setFlag(FLAG_SCOPE, "discipline", chosen);

      // Ensure PSYKER keyword so powers are available
      const psyker = await ensureHasItemByName(actor, "PSYKER", "keyword");
      if (!psyker) ui.notifications?.warn("PSYKER keyword not found in loaded packs. Add it manually from wng-core.");

      // Starter power by discipline
      if (chosen === "sanctic") {
        const ok = await ensureHasItemByName(actor, "Hammerhand (Sanctic)", "psychicPower");
        if (!ok) ui.notifications?.warn("Couldn't auto-add Hammerhand (Sanctic). Drag a Sanctic power from the GK pack.");
      } else {
        const ok = await ensureHasItemByName(actor, "Smite", "psychicPower");
        if (!ok) {
          ui.notifications?.warn("Smite not found in available packs. Please add a Librarius power manually.");
          game.ui?.sidebar?.tabs?.compendium?.activate();
        }
      }
    } catch (e) { console.error("gk-greyknight — Brotherhood prompt:", e); }
  });
});


// gk-greyknight 0.6.4.4 — QoL: Brotherhood Focus summary on sheet open
Hooks.on("renderActorSheet", async (sheet, htmlEl, data) => {
  try {
    const actor = sheet.actor; if (!actor) return;
    const hasBro = actor.items?.some(i => i.type === "ability" && i.name === "Brotherhood of Psykers");
    if (!hasBro) return;
    const tokens = canvas?.tokens?.placeables || [];
    const allied = new Set();
    for (const t of tokens) {
      const a = t.actor; if (!a) continue;
      const ok = a.items?.some(i => i.type === "ability" && i.name === "Brotherhood of Psykers");
      if (ok) allied.add(a.id);
    }
    const total = allied.size;
    const bonus = allied.has(actor.id) ? Math.max(0, total - 1) : total;
    const owners = Object.keys(actor.ownership || {}).filter(uid => actor.ownership[uid] >= CONST.DOCUMENT_OWNERSHIP_LEVELS.OWNER);
    const content = `<div class="gk-brotherhood-summary">
      <h3 style="margin:0 0 .25rem 0;">Brotherhood Focus — Summary</h3>
      <p style="margin:0;">Allies with Brotherhood in scene: <b>${total}</b> (excluding self: <b>${bonus}</b> bonus die to <em>Psychic Mastery</em>).</p>
      <p style="margin:.25rem 0 0;font-size:.9em;opacity:.85;">Reminder: each subsequent power cast this round using the shared focus adds one extra <em>Wrath die</em>. Only one linked character should use a psychic power as their <em>Action</em> per round.</p>
    </div>`;
    ChatMessage.create({content, whisper: owners, speaker: {actor: actor.id}});
  } catch (e) { console.error("gk-greyknight QoL summary:", e); }
});


// gk-greyknight 0.6.4.5 — Reliable Brotherhood notification on psychic power use
Hooks.on("createChatMessage", async (doc, options, userId) => {
  try {
    // Heuristic detection of psychic power usage
    const flavor = (doc.flavor || "").toLowerCase();
    const contentText = (ui?.chat && doc.content) ? TextEditor?.stripHTML(doc.content)?.toLowerCase?.() : (doc.content || "").toLowerCase();
    const keyWords = ["psychic", "psychic mastery", "power", "smite", "hammerhand", "sanctuary", "shrouding", "might of titan"];
    const looksPsychic = keyWords.some(k => flavor.includes(k) || contentText.includes(k));
    if (!looksPsychic) return;

    // Resolve actor
    let actor = null;
    const sp = doc.speaker || {};
    if (sp.actor) actor = game.actors?.get(sp.actor);
    if (!actor && canvas?.tokens) {
      const t = canvas.tokens.get(sp.token) || canvas.tokens.controlled?.[0];
      actor = t?.actor || actor;
    }
    if (!actor) return;

    // Check Brotherhood ability on actor
    const hasBrotherhood = actor.items?.some(i => i.type === "ability" && i.name === "Brotherhood of Psykers");
    if (!hasBrotherhood) return;

    // Count allies with Brotherhood in the scene
    const tokens = canvas?.tokens?.placeables || [];
    const allied = new Set();
    for (const t of tokens) {
      const a = t.actor; if (!a) continue;
      const ok = a.items?.some(i => i.type === "ability" && i.name === "Brotherhood of Psykers");
      if (ok) allied.add(a.id);
    }
    const total = allied.size;
    const bonus = allied.has(actor.id) ? Math.max(0, total - 1) : total;

    // Compose message
    const msg = `<div class="gk-brotherhood-notice">
      <b>Brotherhood Focus</b>: Allies with Brotherhood here: <b>${total}</b> → bonus to <em>Psychic Mastery</em>: <b>+${bonus} dice</b>.
      <div style="opacity:.85;font-size:.9em;margin-top:.25rem;">House rule: only one linked Grey Knight should use a psychic power as their <em>Action</em> per round; subsequent powers add +1 <em>Wrath</em> die.</div>
    </div>`;

    // Whisper to owners + GM
    const ownerIds = Object.entries(actor.ownership || {})
      .filter(([uid, lvl]) => lvl >= (CONST.DOCUMENT_OWNERSHIP_LEVELS?.OWNER ?? 3))
      .map(([uid]) => uid);
    const gmIds = game.users?.filter(u => u.isGM).map(u => u.id) ?? [];
    const whisper = Array.from(new Set([...ownerIds, ...gmIds]));
    await ChatMessage.create({content: msg, whisper, speaker: {actor: actor.id}});

    // If in combat, enforce one-per-round reminder
    const combat = game.combat;
    if (combat) {
      const key = `gk-greyknight.usedPsychicAction.r${combat.round}`;
      const prev = combat.getFlag("gk-greyknight", key) || null;
      if (prev && prev !== actor.id) {
        ui.notifications?.warn("House rule (Brotherhood Focus): only one Grey Knight should use a psychic power as their Action this round.");
      } else if (!prev) {
        await combat.setFlag("gk-greyknight", key, actor.id);
      }
    }
  } catch (e) {
    console.error("gk-greyknight 0.6.4.5 notification error:", e);
  }
});