import { useShellStore } from "./shellStore";
import { specializationById } from "../game/specializationCatalog";
import { defaultPartyRoleForClass, type PartyRole } from "../game/partyRoles";
import { createBossTestingRoom, type TestableBoss } from "../game/bossTesting";
import { clearBossTestingDungeons, registerBossTestingDungeon, requireDungeonDefinition } from "../game/dungeonRegistry";
import { activateDungeonSession } from "../game/dungeonSession";
import { dungeonContentIsUsable, initializeContentSystem, installContentPack } from "../content/contentManager";

let preparationQueue: Promise<void> = Promise.resolve();

export async function prepareBossTesting(boss: TestableBoss): Promise<void> {
  if (dungeonContentIsUsable(boss.dungeonId)) return;
  const preparation = preparationQueue.then(async () => {
    await initializeContentSystem();
    if (!dungeonContentIsUsable(boss.dungeonId)) await installContentPack(`dungeon:${boss.dungeonId}`);
    if (!dungeonContentIsUsable(boss.dungeonId)) throw new Error("The boss assets could not be verified. Please retry the download.");
  });
  preparationQueue = preparation.catch(() => undefined);
  await preparation;
}

export function enterBossTesting(boss: TestableBoss, requestedRole?: PartyRole): boolean {
  const shell = useShellStore.getState();
  const character = shell.characters.find((entry) => entry.id === shell.selectedCharacterId);
  if (!shell.session || !character) throw new Error("Select a character first.");
  const specialization = specializationById(character.specializationId);
  if (character.categoryId !== "rom" && !specialization) throw new Error("Choose a specialization in the Class Hall first.");
  const { definition, session } = createBossTestingRoom(requireDungeonDefinition(boss.dungeonId), boss);
  registerBossTestingDungeon(definition, boss.dungeonId);
  if (!activateDungeonSession(definition.id, undefined, { gmTestMode: true, bossTest: session })) {
    clearBossTestingDungeons();
    throw new Error("The boss testing room could not be started. Check the downloaded assets and retry.");
  }
  useShellStore.setState({ phase: "game", activeCharacter: character, activeDungeonId: definition.id,
    activeDungeonRole: specialization?.role ?? requestedRole ?? defaultPartyRoleForClass(character.classId), notice: "" });
  return true;
}