import { touchCharacter } from "./accountRepository";
import { useShellStore } from "./shellStore";
import { registerGeneratedManastormStageAssets } from "../game/manastormAssetRegistry";
import {
  isGameMasterSession,
  resolvedBossAdminCatalog,
} from "../game/manastormAdminConfig";
import {
  drawRandomGmReviewTarget,
  type GmReviewKind,
  type GmReviewTarget,
} from "../game/gmContentReview";
import { useManastormAdminStore } from "../game/manastormAdminStore";
import { INSTALLED_MANASTORM_RUNTIME_CATALOG } from "../game/manastormInstalledCatalog";
import { installedManastormStageBinding } from "../game/manastormInstalledStages";
import { registerManastormStageBindingResolver } from "../game/manastormStagePopulation";
import { activateManastormStage, releaseActiveManastormStage } from "../game/manastormStageLoader";
import { manastormModeForCharacterLevel, setManastormCatalog } from "../game/manastorm";
import { createEmptyManastormProgress, manastormModeProgress } from "../game/manastormProgress";
import { manastormActiveSpellLoadoutModel } from "../game/manastormSpellLoadout";
import { useManastormStore } from "../game/manastormStore";
import { defaultPartyRoleForClass } from "../game/partyRoles";
import { useGameStore } from "../game/store";
import { activateDungeonSession } from "../game/dungeonSession";
import type { CharacterProfile } from "./types";

function activeGmCharacter(): CharacterProfile | null {
  const shell = useShellStore.getState();
  if (!isGameMasterSession(shell.session) || !shell.selectedCharacterId) {
    useShellStore.setState({ notice: "Game Master access is required." });
    return null;
  }
  const activeCharacter = touchCharacter(shell.session!.ownerId, shell.selectedCharacterId)
    ?? shell.characters.find((character) => character.id === shell.selectedCharacterId)
    ?? null;
  if (!activeCharacter) {
    useShellStore.setState({ notice: "Select a character before testing content." });
    return null;
  }
  return activeCharacter;
}

function enterGmDungeonTest(target: Extract<GmReviewTarget, { readonly kind: "dungeon" }>): boolean {
  const activeCharacter = activeGmCharacter();
  if (!activeCharacter) return false;
  useManastormStore.getState().resetRun();
  releaseActiveManastormStage();
  if (!activateDungeonSession(target.dungeonId, undefined, {
    gmTestMode: true,
    gmReviewTarget: target,
  })) {
    useShellStore.setState({ notice: "That dungeon did not pass its offline runtime gate." });
    return false;
  }
  useGameStore.getState().setCompanionOpen(false);
  useShellStore.setState({
    phase: "game",
    activeCharacter,
    activeDungeonId: target.dungeonId,
    activeDungeonRole: defaultPartyRoleForClass(activeCharacter.classId),
    notice: "GM dungeon review",
  });
  return true;
}

export function enterRandomGmReview(kind: GmReviewKind): boolean {
  const admin = useManastormAdminStore.getState();
  if (admin.dirty || admin.saving) {
    useShellStore.setState({ notice: "Save or discard GM changes before testing another target." });
    return false;
  }
  const previous = useGameStore.getState().activeGmReviewTarget;
  const target = drawRandomGmReviewTarget(kind, admin.config, previous);
  if (!target) {
    const label = kind === "dungeon" ? "dungeons" : kind === "boss" ? "bosses" : "Manastorm encounters";
    useShellStore.setState({ notice: `All runnable ${label} have been marked Ready.` });
    return false;
  }
  if (target.kind === "dungeon") return enterGmDungeonTest(target);
  return enterGmManastormTest(target.bossKey, target);
}

export function enterGmManastormTest(bossKey: string, reviewTarget: GmReviewTarget | null = null): boolean {
  const activeCharacter = activeGmCharacter();
  if (!activeCharacter) return false;
  const adminConfig = useManastormAdminStore.getState().config;
  const entry = resolvedBossAdminCatalog(adminConfig).find((candidate) => candidate.key === bossKey);
  if (!entry || !entry.runnable || !entry.stage) {
    useShellStore.setState({ notice: entry?.validationIssues[0] ?? "That boss is not available for GM testing." });
    return false;
  }

  registerGeneratedManastormStageAssets();
  registerManastormStageBindingResolver(installedManastormStageBinding);
  const modeId = manastormModeForCharacterLevel(activeCharacter.level, INSTALLED_MANASTORM_RUNTIME_CATALOG);
  const { milestoneLevel: _milestoneLevel, ...stageWithoutMilestone } = entry.stage;
  const testStage = Object.freeze({
    ...stageWithoutMilestone,
    modeIds: [modeId],
    stageKind: "standard" as const,
    unlockLevel: 1,
    chaoticLinkEnabled: adminConfig.global.chaoticLinkEnabled,
  });
  const testCatalog = Object.freeze({
    ...INSTALLED_MANASTORM_RUNTIME_CATALOG,
    stages: [testStage],
    fallbackPolicy: "none" as const,
    runtimeOptions: Object.freeze({ ...adminConfig.global }),
  });
  setManastormCatalog(testCatalog);
  useManastormStore.getState().resetRun();
  const progress = activeCharacter.manastormProgress ?? createEmptyManastormProgress();
  const modeProgress = manastormModeProgress(progress, modeId);
  const spellLoadout = manastormActiveSpellLoadoutModel(
    activeCharacter.classId,
    activeCharacter.level,
    activeCharacter.talentRanks,
  );
  let encounter;
  try {
    encounter = useManastormStore.getState().startRun({
      partySize: 5,
      startingLevel: 1,
      unlockedThroughLevel: 1,
      modeId,
      activeSpellLoadout: {
        available: spellLoadout.options,
        selectedIds: progress.loadout,
        maxSelections: spellLoadout.maxSelections,
        provenance: spellLoadout.provenance,
      },
      cacheMeter: modeProgress.cacheMeter,
      rewardCaches: modeProgress.rewardCaches,
      random: () => 0,
    });
  } catch {
    useShellStore.setState({ notice: "The configured boss could not be prepared for testing." });
    return false;
  }
  if (!activateManastormStage(encounter, undefined, false, true, reviewTarget).activated) {
    useManastormStore.getState().resetRun();
    useShellStore.setState({ notice: "The configured dungeon or stage package is not loadable." });
    return false;
  }

  useGameStore.getState().setCompanionOpen(false);
  useShellStore.setState({
    phase: "game",
    activeCharacter,
    activeDungeonId: encounter.dungeonId,
    activeDungeonRole: defaultPartyRoleForClass(activeCharacter.classId),
    notice: `GM test: ${entry.name}`,
  });
  return true;
}