import type { ClassId } from "../app/characterCatalog";
import type {
  OnlineMobTransform,
  OnlineRelayEventInput,
  OnlineSessionPlayer,
} from "../app/onlineSessionTypes";
import {
  normalizeActorResourcePool,
  type CombatActorState,
} from "./combatActors";

const ONLINE_PLAYER_PREFIX = "online-player:";
let active = false;
let authority = true;
let localAccountId: string | null = null;
let playerActors = new Map<string, CombatActorState>();
let players = new Map<string, OnlineSessionPlayer>();
let mobTransforms = new Map<string, OnlineMobTransform>();
let interactionSequence = 0;
let interactions: OnlineRelayEventInput[] = [];

export function onlinePlayerActorId(accountId: string): string {
  return `${ONLINE_PLAYER_PREFIX}${accountId}`;
}

export function onlineAccountIdFromActor(actorId: string): string | null {
  return actorId.startsWith(ONLINE_PLAYER_PREFIX)
    ? actorId.slice(ONLINE_PLAYER_PREFIX.length)
    : null;
}

export function isOnlinePlayerActorId(actorId: string): boolean {
  return actorId.startsWith(ONLINE_PLAYER_PREFIX);
}

export function configureOnlineSessionRuntime(input: {
  readonly active: boolean;
  readonly authority: boolean;
  readonly localAccountId: string | null;
  readonly players?: readonly OnlineSessionPlayer[];
  readonly mobTransforms?: Readonly<Record<string, OnlineMobTransform>>;
}): void {
  active = input.active;
  authority = !input.active || input.authority;
  localAccountId = input.localAccountId;
  players = new Map((input.players ?? []).map((player) => [player.accountId, player]));
  mobTransforms = new Map(Object.entries(input.mobTransforms ?? {}));
  const nextActors = new Map<string, CombatActorState>();
  for (const player of input.players ?? []) {
    if (player.accountId === input.localAccountId || !player.character) continue;
    const id = onlinePlayerActorId(player.accountId);
    const maximum = Math.max(0, player.maxResource);
    const resourceId = player.resourceName.toLowerCase() || "resource";
    nextActors.set(id, {
      id,
      threatActorId: id,
      kind: "companion",
      ownerId: player.accountId,
      classId: player.character.classId as ClassId,
      level: player.character.level,
      health: player.health,
      maxHealth: player.maxHealth,
      absorb: 0,
      resources: maximum > 0
        ? { [resourceId]: normalizeActorResourcePool(resourceId, player.resource, maximum) }
        : {},
      cooldowns: {},
      globalCooldownEndsAt: 0,
      cast: player.activeCast ? {
        abilityId: player.activeCast.abilityId,
        school: player.activeCast.school,
        mode: player.activeCast.mode,
        startedAt: player.activeCast.startedAt,
        completesAt: player.activeCast.completesAt,
        originalDurationMs: player.activeCast.originalDurationMs,
        pushbackHits: player.activeCast.pushbackHits,
        origin: player.activeCast.origin,
        targetId: player.activeCast.targetId,
      } : null,
      controlledUntil: 0,
      schoolLockedUntil: {},
      comboPoints: 0,
      comboTargetId: null,
      runes: [],
      alive: player.health > 0,
    });
  }
  playerActors = nextActors;
  if (!input.active) interactions = [];
}

export function onlineSessionIsActive(): boolean {
  return active;
}

export function onlineSessionOwnsWorldSimulation(): boolean {
  return !active || authority;
}

export function onlineSessionLocalAccountId(): string | null {
  return localAccountId;
}

export function onlinePlayerRuntimeActors(): readonly CombatActorState[] {
  return [...playerActors.values()];
}

export function onlinePlayerRuntimeActor(actorId: string): CombatActorState | null {
  return playerActors.get(actorId) ?? null;
}

export function onlineSessionPlayer(accountId: string): OnlineSessionPlayer | null {
  return players.get(accountId) ?? null;
}

export function onlineSynchronizedMobTransform(id: string): OnlineMobTransform | null {
  return active && !authority ? mobTransforms.get(id) ?? null : null;
}

export function requestOnlineInteraction(kind: "loot" | "portal", targetActorId = ""): boolean {
  if (!active || authority) return false;
  interactionSequence += 1;
  interactions.push({
    clientEventId: `interaction:${kind}:${Date.now()}:${interactionSequence}`,
    kind,
    sourceActorId: localAccountId ? onlinePlayerActorId(localAccountId) : "",
    targetActorId,
    occurredAt: Date.now(),
  });
  return true;
}

export function drainOnlineInteractions(): readonly OnlineRelayEventInput[] {
  const pending = interactions;
  interactions = [];
  return pending;
}