"use server";

/**
 * Canonical server-action surface for the poker minigame.
 * The signatures below are the pinned contract shared with the UI layer.
 * All table logic lives in the registry (src/lib/minigames/poker/tables.ts).
 */

import config from "@payload-config";
import { getPayload } from "payload";
import type { Card, PokerActionKind, PrivatePlayerView } from "@/lib/minigames/poker/types";
import { isSuperuser } from "@/utils/access-control/hasPermission";
import {
  adjustStack,
  applyPlayerAction,
  createTable,
  forceExpireTable,
  getSnapshotFor,
  joinTableWithBuyIn,
  leaveTableWithBuyIn,
  spectateTable,
  listSummaries,
  renameTable,
  setBoardQueue,
  setHoleQueue,
  startGameWithBuyIn,
  type PokerSnapshot,
  type PokerTableSummary,
} from "@/lib/minigames/poker/tables";

export type { PokerSnapshot, PokerTableSummary };
export type PokerCardInput = Card;

interface ActionResult<T = undefined> {
  success: boolean;
  error?: string;
  data?: T;
}

async function authenticate() {
  const payloadConfig = await config;
  const payload = await getPayload({ config: payloadConfig });
  const { headers } = await import("next/headers");
  const hdrs = await headers();
  const { user } = await payload.auth({
    headers: hdrs,
    canSetHeaders: false,
  });

  if (!user) {
    throw new Error("Unauthorized");
  }

  return { payload, user };
}

function toError(error: unknown): { success: false; error: string } {
  const message = error instanceof Error ? error.message : "Unknown error";
  if (message === "Unauthorized") {
    return { success: false, error: "You must be logged in." };
  }
  return { success: false, error: message };
}

interface UserLike {
  id: number;
  displayName?: string | null;
  username?: string | null;
}

function userName(user: UserLike): string {
  if (typeof user.displayName === "string" && user.displayName) return user.displayName;
  if (typeof user.username === "string" && user.username) return user.username;
  return `Player ${user.id}`;
}

export async function createPokerTable(): Promise<ActionResult<{ tableId: string }>> {
  try {
    const { user } = await authenticate();
    const tableId = createTable(Number(user.id), userName(user));
    return { success: true, data: { tableId } };
  } catch (error) {
    return toError(error);
  }
}

export async function listPokerTables(): Promise<ActionResult<PokerTableSummary[]>> {
  try {
    await authenticate();
    return { success: true, data: listSummaries() };
  } catch (error) {
    return toError(error);
  }
}

export async function forceExpirePokerTable(tableId: string): Promise<ActionResult<undefined>> {
  try {
    const { payload, user } = await authenticate();
    const allowed = await isSuperuser(payload, user);
    if (!allowed) {
      return { success: false, error: "Only administrators can force-end tables." };
    }
    forceExpireTable(tableId, payload);
    return { success: true };
  } catch (error) {
    return toError(error);
  }
}

export async function joinPokerTable(tableId: string): Promise<ActionResult<PokerSnapshot>> {
  try {
    const { user } = await authenticate();
    const snapshot = await joinTableWithBuyIn(tableId, Number(user.id), userName(user));
    return { success: true, data: snapshot };
  } catch (error) {
    return toError(error);
  }
}

export async function spectatePokerTable(tableId: string): Promise<ActionResult<PokerSnapshot>> {
  try {
    const { user } = await authenticate();
    const snapshot = spectateTable(tableId, Number(user.id));
    return { success: true, data: snapshot };
  } catch (error) {
    return toError(error);
  }
}

export async function setPokerBoardQueue(
  tableId: string,
  cards: PokerCardInput[],
): Promise<ActionResult<PokerSnapshot>> {
  try {
    const { payload, user } = await authenticate();
    const allowed = await isSuperuser(payload, user);
    if (!allowed) {
      return { success: false, error: "Only administrators can use dev controls." };
    }
    const snapshot = setBoardQueue(tableId, Number(user.id), cards);
    return { success: true, data: snapshot };
  } catch (error) {
    return toError(error);
  }
}

export async function setPokerHoleQueue(
  tableId: string,
  seatId: number,
  cards: PokerCardInput[],
): Promise<ActionResult<PokerSnapshot>> {
  try {
    const { payload, user } = await authenticate();
    const allowed = await isSuperuser(payload, user);
    if (!allowed) {
      return { success: false, error: "Only administrators can use dev controls." };
    }
    const snapshot = setHoleQueue(tableId, Number(user.id), seatId, cards);
    return { success: true, data: snapshot };
  } catch (error) {
    return toError(error);
  }
}

export async function adjustPokerStack(
  tableId: string,
  seatId: number,
  delta: number,
): Promise<ActionResult<PokerSnapshot>> {
  try {
    const { payload, user } = await authenticate();
    const allowed = await isSuperuser(payload, user);
    if (!allowed) {
      return { success: false, error: "Only administrators can use dev controls." };
    }
    const snapshot = adjustStack(tableId, Number(user.id), seatId, delta);
    return { success: true, data: snapshot };
  } catch (error) {
    return toError(error);
  }
}

export async function leavePokerTable(tableId: string): Promise<ActionResult<undefined>> {
  try {
    const { user } = await authenticate();
    await leaveTableWithBuyIn(tableId, Number(user.id));
    return { success: true };
  } catch (error) {
    return toError(error);
  }
}

export async function startPokerGame(tableId: string): Promise<ActionResult<PokerSnapshot>> {
  try {
    const { user } = await authenticate();
    const snapshot = await startGameWithBuyIn(tableId, Number(user.id));
    return { success: true, data: snapshot };
  } catch (error) {
    return toError(error);
  }
}

export async function renamePokerTable(
  tableId: string,
  rawName: string,
): Promise<ActionResult<PokerSnapshot>> {
  try {
    const { user } = await authenticate();
    const snapshot = renameTable(tableId, Number(user.id), rawName);
    return { success: true, data: snapshot };
  } catch (error) {
    return toError(error);
  }
}

export async function fetchPokerTable(tableId: string): Promise<ActionResult<PokerSnapshot>> {
  try {
    const { user } = await authenticate();
    const snapshot = getSnapshotFor(tableId, Number(user.id));
    return { success: true, data: snapshot };
  } catch (error) {
    return toError(error);
  }
}

export async function pokerAction(
  tableId: string,
  kind: PokerActionKind,
  amount?: number,
): Promise<ActionResult<PokerSnapshot>> {
  try {
    const { user } = await authenticate();
    const snapshot = applyPlayerAction(tableId, Number(user.id), kind, amount);
    return { success: true, data: snapshot };
  } catch (error) {
    return toError(error);
  }
}