import type { CreateExpressContextOptions } from "@trpc/server/adapters/express";
import type { User } from "../../drizzle/schema";
import { sdk } from "./sdk";
import { parse as parseCookieHeader } from "cookie";
import { verifyLocalToken, getLocalUserById, LOCAL_AUTH_COOKIE } from "../localAuth";

export type TrpcContext = {
  req: CreateExpressContextOptions["req"];
  res: CreateExpressContextOptions["res"];
  user: User | null;
};

export async function createContext(
  opts: CreateExpressContextOptions
): Promise<TrpcContext> {
  let user: User | null = null;

  // 1. Essayer l'authentification Manus OAuth
  try {
    user = await sdk.authenticateRequest(opts.req);
  } catch {
    user = null;
  }

  // 2. Si pas d'utilisateur OAuth, essayer le cookie d'auth locale
  if (!user) {
    try {
      const cookieHeader = opts.req.headers.cookie;
      if (cookieHeader) {
        const cookies = parseCookieHeader(cookieHeader);
        const localToken = cookies[LOCAL_AUTH_COOKIE];
        if (localToken) {
          const payload = await verifyLocalToken(localToken);
          if (payload) {
            const localUser = await getLocalUserById(payload.userId);
            if (localUser && localUser.isActive) {
              // Construire un objet User compatible avec le type attendu par tRPC
              // On utilise un openId synthétique basé sur l'id local
              user = {
                id: localUser.id,
                openId: `local:${localUser.id}`,
                name: localUser.name,
                email: localUser.email ?? null,
                loginMethod: "local",
                role: localUser.role === "admin" ? "admin" : "user",
                createdAt: localUser.createdAt,
                updatedAt: localUser.updatedAt,
                lastSignedIn: localUser.lastSignedIn ?? new Date(),
              } as User;
            }
          }
        }
      }
    } catch (error) {
      // Auth locale optionnelle — on ignore les erreurs
      user = null;
    }
  }

  return {
    req: opts.req,
    res: opts.res,
    user,
  };
}